Caring for our coast, caring for our future Ministry of Environment and Tourism A resource book for upper-primary learners and teachers Namibian Coast Conservation and Management Project (NACOMA) Caring for our coast, caring for our future Resource book for upper-primary learners and teachers Ministry of Environment and Tourism Namibian Coast Conservation and Management Project (NACOMA) Sam Nujoma Avenue, Standard Bank building, 1st floor, room 8 P.O. Box 7018, Swakopmund Tel: 064-403-905 http://www.nacoma.org.na © Ministry of Environment and Tourism 2009. Copyright is waived for non-profit educational purposes. Activities and information can be freely photocopied for use in institutions of learning. ISBN: 978-99945-68-99-4 Many people had a hand in the development of this book, and all are thanked. Important contributors include Ginger Mauney, Juliane Ziegler, Nicky Marais, Haiko Bruns, Hans Ovlisen, Rod Braby, Nathalie Cadot and teachers of schools in Henties Bay, Swakopmund, Walvis Bay, Narraville and Lüderitz. Project Co-ordinators: Written by: Illustrations by: Layout and design: Printed by: Integrated Environmental Consultants Namibia (IECN) cc P.O. Box 86634, Eros, Windhoek, Namibia Juliane Zeidler, Reagan Chunga, Hans Ovlisen and Ginger Mauney Ginger Mauney Nicky Marais Haiko Bruns John Meinert Printing Pty (Ltd) This project was funded by the Global Environmental Facility (GEF), the Government of the Republic of Namibia and the World Bank. COASTODIANS • Caring for our coast, caring for our future Page COASTODIANS Caring for our coast, caring for our future Namibia’s coastline is a place of natural wonders, economic importance, adventure and diversity. Take pride in your coast! Become a Coastodian – caring for our coast, caring for our future. The Ministry of Environment and Tourism through its Namibian Coast Conservation and Management Project (NACOMA) is currently implementing the Government’s strategy to promote sustainable economic development in the coastal zone, balanced with its natural resources. By reaching out to teachers, learners and their families, the Ministry of Environment and Tourism (MET) wants to inform Namibians of the diversity of our coastal environment and the pressures it faces. Through information, MET hopes to inspire all Namibians – and most particularly those living at the coast – to become Coastodians. This coastal awareness booklet is designed as an aid to environmental education, the process of becoming informed about your environment. Environmental education helps you acquire skills that give you some control over the constantly changing environment. In acquiring skills and knowledge, you can become more self-sufficient and better able to manage resources in a sustainable way. Coastodian was derived from the words custodian and coast. Custodian implies a person(s) who has the responsibility to look after something and be accountable for it, hence the name: Coastodian. Page COASTODIANS • Caring for our coast, caring for our future Contents Chapter One - Where do you stand? .................................................................................................................... 5 Chapter Two - What makes Namibia’s coastal environment unique? ........................................................ 9 Chapter Three - Get water wise! . ............................................................................................................................12 Chapter Four - Desert ecology: is there life out there? . .................................................................................18 Chapter Five - Wetlands: global importance, local magic..............................................................................23 Chapter Six - Environmental changes: natural and unnatural stresses on our coast...........................27 Chapter Seven - Using our resources wisely ......................................................................................................30 Chapter Eight - Coastal conservation: the future in our hands....................................................................34 COASTODIANS • Caring for our coast, caring for our future Page Chapter One Where do you stand? Namibia’s coastline runs for approximately 1 600 km from the Kunene River in the north to the Orange River in the south. These two perennial or flowing rivers also mark Namibia’s borders with two of our neighbouring countries, Angola to the north and, on our southern border, South Africa. Carved into the rest of our country’s long coastline are both natural and man-made features including ephemeral or seasonal river courses, cities and mining concerns, harbours and the fishing industry, wetlands, sand dunes and protected national parks and reserves. Off shore, there are 16 small islands, plus islets and rocks along Namibia’s southern coast that are important sites for fish, seabirds and marine mammals. Working with this booklet will help you understand what makes our coastal environment so special and how you can become a COASTODIAN, caring for our coast, caring for our future. Take a look at this map of Namibia. Where do you stand? Can you locate your hometown or other features on the map? Dominant features Nature and man have made their mark on the Namibian coastline. Some of the most dominant features include: Natural: 8Namib Desert 8Skeleton Coast 8Diamond coast 8Cape Cross Seal Reserve 8Walvis Bay wetlands and lagoon 8Sandwich Harbour wetland 8Lüderitz Bay 8Orange River 8Kunene River 8Swakop River 8Kuiseb River Man-made: 8Towns: Lüderitz, Walvis Bay, Swakopmund, Henties Bay and Oranjemund 8Salt works 8Guano platforms 8Aquaculture farms at Lüderitz and Walvis Bay Page 8Harbours at Lüderitz and Walvis Bay 8Diamond mining at Oranjemund and along the coast near Lüderitz 8Toscanini 8Uranium mining inland from Swakopmund COASTODIANS • Caring for our coast, caring for our future COASTODIANS • Caring for our coast, caring for our future Page Living systems For those of us lucky enough to live along Namibia’s coast, we share this fascinating place with plants, chameleons, penguins, seals and other people. In environmental terms, these different groups create biodiversity. Biodiversity refers to the variety of plant and animal life in a particular habitat. A habitat can range in size from a single rock to your backyard to the world as a whole, and for every habitat a high level of biodiversity is desirable. The variety of life within a particular habitat that makes up our biodiversity is a defined or classified as species. Aloes, pelicans and humans are all different species. Species means a type or classification, and eco-systems are communities of different species interacting with one another and with their physical environment. This adds to global biodiversity, and without diversity, life would be rather boring! Biodiversity, the diversity of plant and animal life within an eco-system, like the coast, helps answer the question: is our coastline healthy? In Namibia, human activities like poor farming methods and industrial pollution can cause imbalances in our eco-systems that result in environmental disasters, like the extinction of animals and plants. Important places and parks in Namibia, such as the wetlands at the Orange River Mouth, the Namib-Naukluft Park and the Cape Cross Seal Reserve, give us an opportunity to study, appreciate and protect this biodiversity. Biodiversity facts and figures There are an estimated 80 million different species of organisms living on our planet. During the next 25 to 30 years, 25% of these face extinction. By destroying forests and wetlands, polluting our oceans and streams, we are forcing the extinction of plants and animals living in these and other natural habitats. An estimated 185 000 species of plants, animals and other living organisms are found in Namibia, and many of them live in and along Namibia’s coast. Shouldn’t you get to know them? Read on, and become a COASTODIAN. Page COASTODIANS • Caring for our coast, caring for our future DID YOU KNOW? The Namibian coast is classified as hyper arid desert, but fog plays an important role in supporting fascinating plant and animal life. There are around 1,6 million birds from 73 species are found along the Namibian Coast. Between Swakopmund and Walvis Bay, there are up to 770 birds per kilometre of beach. This stretch of beach is declared an Important Bird Area. 493 species of fish and 25 species of shellfish occur in Namibian waters. Around 552 000 tons of fish was harvested by the fishing industry in Namibia in 2005. COASTODIANS CAN … • Learn more about the environment in which you live… remember we are not alone! • Become more environmentally literate by learning the meaning of terms such as biodiversity, species and eco-systems • Help protect coastal biodiversity – do not litter, do not drive off road, respect the difference types of life along the coast! • Remember - you can make a difference! COASTODIANS • Caring for our coast, caring for our future Page Activities Geography • How many landmarks can you find on your coastal map? English • Learn environmental terms, such as coast, biodiversity, ephemeral, arid, desert, and species. Make a set of flash cards using these words to test your classmates! • Choose books from the library with sea themes to use in lessons. Outside • Look around your school. How many different species or elements of biodiversity can you find? Keep a running list of these in your classroom and add to them when you can. Art • Design a poster on conservation and biodiversity. It’s fun and it will help you learn more about the issues affecting our fragile coastal environment. Page COASTODIANS • Caring for our coast, caring for our future Chapter Two What makes Namibia’s coastal environment unique? Defining the coast is simple. The coast is the place where land meets ocean. But that is just the beginning. Understanding the coast can be a lot more challenging, and a lot more fun! Namibia’s coastal environment is a fascinating place. Though it has been around for hundreds of millions of years, the coast seems to be constantly changing! One minute the fog drifts in and you are soaking wet, then the hot wind blows through, drying your clothes and stinging your skin. Hot, cold, wet, and dry, all at the same time! What is going on here? To understand the coastal environment and our place in it, we need to know more about the natural forces that shape it, the life it supports, and what the future holds for our coastal environment. AT SEA AND ON LAND There are four major environmental factors affecting our coast: 1 the Benguela Current 2 the South Atlantic high-pressure system 3 South and south-westerly winds 4 the Namib Desert Even when the sea looks bleak, it is home to an incredible variety of life. The Benguela current brings cold Antarctic water into warmer regions along the southern and western coast of Africa. Moved along by south and south-westerly winds and the South Atlantic high-pressure system, the Benguela current pushes warm surface water away from the coast and replaces it with deep, cold ocean water. This ocean water is rich in nutrients and is the basis for a long food chain. COASTODIANS • Caring for our coast, caring for our future Page From microscopic organisms to small fish like pilchard up to sharks, seabirds and other predators – like us – the food chain supports a variety of life and is also the foundation for Namibia’s important fishing industry. On land, the fog is created when cold sea air collides with the hot, dry conditions of the Namib Desert. The moisture from fog makes it possible for a host of desert-adapted plants and animals, including a large number of endangered species, to survive. The Fifth Factor It’s not waves or winds. It doesn’t burrow in the sand at night or migrate to our shores during winter. The fifth – or maybe it should be the first – most important factor impacting our coastal environment is ….. US! Our mines, our fishing industry, our off road driving, our litter and our choice to clean up and conserve have a huge affect on the coastal environment. Increased human pressures over the past several years highlight the urgent need for us to understand our coastal environment. With understanding comes a desire to protect and use our coastal resources wisely now and in the future. COASTODIANS CAN … • Take pride in our unique coastline and the life it supports • Realise the responsibility that comes with being a part of this fascinating biodiversity • Become a weatherman! Understand coastal pressure systems and prevailing winds Page 10 COASTODIANS • Caring for our coast, caring for our future Activities English • make a set of “sea word” cards. Give learners a number of cards and ask them to combine the words to make marine environmental words. Teams can be formed so that learners work together and they can use a dictionary to check if the words exist. • Write an English essay on how has the use of the sea resulted in major changes around in the world and in Namibia. Think about trade, industry, the exchange of ideas and tourism. Art • Design a postage stamp that reflects some aspect of Namibia’s coastal environment. Outside • Invite someone from NACOMA, the Ministry of Fisheries and Marine Resources or the Ministry of Environment and Tourism to talk to your class about the coastal environment. COASTODIANS • Caring for our coast, caring for our future Page 11 Chapter Three Get water wise! Standing at the coast, looking out across the Atlantic Ocean and all you see is water. But you know this water is saline or salty and cannot be consumed without going through the expensive process of desalination (removing the salt). Turn around and look inland. Now you face sand, gravel plains and in some cases buildings or urban development, but not a drop of water. Water is our most precious natural resource. All plants and animals – including people – need water to live. Water is also vital to agriculture and industry. Water has to be shared between people, livestock and crops, industry and services that provide employment, and the natural environment which also needs and provides us with water. For water resources to be managed in a sustainable way in an arid environment like Namibia, the consumer (that’s us and our industries) needs to be aware of the availability of water in relation to our water needs. Water management refers to control over and administration of water resources. Various methods of water management can be used. For example, water can be supplied according to demand or it can be supplied according to availability. Water availability at the coast depends on water abstraction (or usage) inland. This means that land uses upstream need to be controlled to ensure that our water sources are “healthy.” If the demand for water exceeds availability, the use of this limited resource will not be sustainable. A sustainable resource is one, which if used wisely today, can be used by future generations. Page 12 COASTODIANS • Caring for our coast, caring for our future Where does our water come from? Along the coast, all of our fresh water comes from aquifers (water stored underground) found under ephemeral rivers. Ephemeral (pronounced eff-em-ur-al) means ‘short-lived’, which, with regards to rivers, means that they only flow after heavy rains fall in their catchment area. Catchment is the area that “catches” rainfall that feeds any river or aquifer. These ephemeral river courses may remain dry for several years, before strong rains force water down them again and recharge the aquifers. For example, ephemeral rivers in the central region include the Swakop, Kuiseb and Omaruru Rivers. Although water flows on the surface of these rivers for only a few days each year, they provide large amounts of fresh water for human, animal, mining and industrial use. NAMWATER extracts, or takes out, water by using boreholes that tap into underground water. Groundwater from the Kuiseb and Omaruru riverbeds has made it possible for towns such as Swakopmund, Walvis Bay, Henties Bay and Omaruru to develop. Uranium mines rely heavily on water from these aquifers for their mining activities. New mines opening in the desert will also require water from these rivers’ aquifers. With so much new development and limited water supplies, the Namibian government has asked new uranium mines to provide their own water by building desalination plants. Besides pumping water from the aquifers, surface water in the Swakop, Omaruru and Kuiseb rivers is collected in a number of dams. The Von Bach and Swakoppoort dams on the Swakop River supply the central region of Namibia, including Windhoek, with fresh water. The Omdel Dam on the Omaruru River is a unique dam in that it does not store water on the surface but rather functions to encourage water to penetrate the soil and so supply the Omaruru Delta Aquifer. In recent years as the demand for water has increased, flows of the Swakop and Kuiseb Rivers have become less frequent. This is a cause for concern since river flow is essential for recharging the groundwater of the aquifers. River flow is also important for recharging beaches with sand. Without this phenomenon, coastal erosion increases. There is only one large dam on the Kuiseb River, the Friedenau Dam near Windhoek. But there are also approximately 400 farm dams built along the Kuiseb and its tributaries. Although a single farm dam is too small to have a major impact on flow patterns in the river, the combined affect of hundreds of small dams may strongly influence the amount of water that reaches the lower parts of the catchment. With no fresh water sources nearby, Lüderitz’s water is pumped from Khoichab Pan. COASTODIANS • Caring for our coast, caring for our future Page 13 Meeting our water needs depends upon: 8Rainfall upstream 8A clean environment along the river system 8Recharging of underground aquifers 8Using this valuable resource wisely Using water from underground aquifers is like withdrawing money from the bank, this action relies upon having money (or water) in the bank. That is not a given. Sometimes the account (or aquifer) is empty and you must wait for a deposit (or recharge) before drawing cash (or water). Keep our water clean Clean water is essential for all life. But with mining, food processing, oil spills at sea, plus industrial, agricultural and human waste, water quality often suffers. The results can be devastating to the land, ocean, animals, plants and to us. Diseases such as cholera, typhoid and hepatitis are water-borne, and drinking dirty water can cause diarrhoea, a leading cause of death in young children. Page 14 COASTODIANS • Caring for our coast, caring for our future So what can you do to keep our water clean? Never litter – anywhere – but especially at the coast where items like discarded fishing line and plastic bags can be deadly to fish, sea birds, turtles and seals. Take your litter home Never throw chemicals or dirty car oil down a toilet or into a river, dam, or the sea. Chemicals such as turpentine and oil from your car can contaminate water and groundwater. Ask your Municipality where you can dispose of these items safely. Never relieve yourself in or near a river or dam. Bacteria from your urine mixed with water could cause animals and people to get sick. Water Conservation and Recycling With coastal towns growing and uranium mining increasing in Erongo region, fresh water availability is a serious problem for these towns and Namibia as a whole. In fact, Namibia is facing the problem of an absolute water scarcity by 2020. By 2020, you will most likely be out of school and part of the work force, perhaps starting a family, and hopefully your actions to conserve water will be part of the solution, helping to insure Namibia’s long-term supply of clean drinking water. Potential long-term solutions to a looming water crisis Fog water harvesting - It is not a new idea: African nomads and Andean people have long taken advantage of trees and other natural water-catching properties by collecting morning dew or using the water trapped by forests. Now scientists around the world are working to help more arid communities harvest the fog water in their regions. The technology is simple: synthetic meshes are set up in areas with dense fog and light winds. As the fog passes through the mesh, the water droplets are caught by the net then drip down into a collection trough and are channelled into a storage tank. Water captured by the nets is of excellent quality. In Chile and other places around the world, fog is a long-term sustainable resource much more reliable in both availability and safety than ground water. Along Namibia’s coast, the Desert Research Foundation of Namibia has experiment with fogcollection. The results indicate that fog is a viable source of water in the Namib and could supplement traditional water sources in rural settlements and perhaps also in urban water supply schemes. COASTODIANS • Caring for our coast, caring for our future Page 15 Desalination – Oceans offer a potentially limitless source of water, problem is we can’t drink it. The water is too salty. Desalination is the process of removing salt from water to make it suitable for humans to drink. The process requires a lot of energy and is expensive, but desalination is an option that has been discussed in Swakopmund for years, and it could be a useful alternative for Namibia’s water supply in the future. The uranium mine at Trekkopje, the largest in the world, has built the first desalination plant in Namibia. The fresh water will be used to process the uranium. The uranium ore is sold to countries like France or United States of America for the production of electricity in a nuclear plant. DID YOU KNOW? The average bath uses 90 litres of water, but a fiveminute shower only uses 20 litres. Cooking and washing up by hand uses 30 litres of water, but an automatic dishwasher uses 80 litres per load. The average amount of water used per person per day in some of Namibia’s urban centres: Henties Bay 312 litres/day Lüderitz 192 litres/day Opuwo 320 litres/day Oshakati 123 litres/day Swakopmund 318 litres/day Walvis Bay 282 litres/day Windhoek 230 litres/day And in Oranjemund an astonishing 4,046 litres/day! The UN basic minimum is 15 litres/day. COASTODIANS CAN … • Turn the water off while you brush your teeth • Water your lawn early in the morning or late in the afternoon when there is less evaporation • Help your parents change leaky taps • Limit showers to 5 minutes or less • Flush the toilet only when it is completely necessary • After washing the dishes or clothes, use this ‘grey water’ to water your plants and trees • Never flush oil, cigarette stubs or other rubbish down the toilet, these items can contaminate the water and add to the amount of water needed to clean water during the sewage treatment process Page 16 COASTODIANS • Caring for our coast, caring for our future Activities Environmental studies • With the help of the teachers, students can carry out a simple environmental audit on water for their school, looking at how much water they use in a month and the associated costs and any measures to reduce the water usage. Students can be encouraged to do the same in their homes. Art • Start a “Keep our water clean” campaign at school with catchy slogans, posters and a prize for the winning class! Outside • Take a walk along one of the dry riverbeds in your area. Map the number of households and land uses, and determining the water abstraction rates. Compare this information to uses in other areas and by businesses and industries in your area. Think of ways to help conserve water and share them with the associated groups. • Visit a Water Recycling plant. Math and biology • Make a fog net and measure how much fog is collected per day. Use this information to work out how large a net and how many days of fog you’d need as that you could fill a 500l bottle or enough water to fill a bath tub. COASTODIANS • Caring for our coast, caring for our future Page 17 Chapter Four Desert ecology – is there life out there? One way to better understand our coastal environment is to learn more about the plants and animals that also live here. Looking inland, out across the desert, you could be mistaken for thinking there is nothing out there! Just sand and rocky plains for as far as the eye can see. But look closer. The Namib Desert is a fascinating place, home to plants and animals that have adapted to survive without water and under extreme conditions. It is the second largest desert in Africa and one of the oldest deserts in the world. In fact, the Namib Desert is so special that is world famous! Each year more than 600,000 people from all over the world visit Namibia and many of them come to enjoy the desert landscape and the flora (plants) and fauna (animals) it holds. Tourism, the industry that brings people to our country and hosts them while they are here, provides jobs, income and further incentive to protect our natural world. Tourism that minimises its impact on the environment and is sensitive to local cultures is called eco-tourism. You are lucky. You don’t have to travel around the world to enjoy the Namib Desert, just step out into the desert and have a closer look at all the amazing life out there! SURVIVAL STRATEGIES Want to learn how to take advantage of the fog or how to beat the heat? Here’s your chance to learn from the experts: Wacky and water-wise On misty mornings, the fog-basking beetle, Onymacris unguicularis moves to the crest of the dune, drops its head, extends its hind legs, tilts forward and lets it body serve as a surface for fog to collect. Soon droplets of water form on its back and slide down and into its mouth. On a foggy morning, this head-standing beetle may drink as much as 40% of its original weight in water. A common slipface lizard, Meroles anchietae, has a very uncommon adaptation that allows it to endure waterless days in the Namib. This lizard stores water in its body, keeping it almost free of body salts, for more than a month. It doesn’t have to stand on its head for water; it has its own internal fresh-water reservoir. Page 18 COASTODIANS • Caring for our coast, caring for our future By not allowing moisture to escape from its body, the gemsbok, Oryx gazella, survives weeks without drinking water. The gemsbok simply stops sweating. At such times its body temperature, normally around 39ºC, might reach as high as 45ºC. This is possible because of another intriguing adaptation. At the base of the gemsbok’s brain is a network of fine blood vessels where the hot blood from the heart is cooled against the blood draining from the nasal sinuses before entering the brain. So while you might feel like your brain is frying in the desert, the gemsbok doesn’t. Lithops, or stone plants, are extremely well adapted to existing with little water. Almost the entire plant grows beneath the surface of the soil where it is protected from heat and evaporation. Only the tips of its leaves appear above the ground’s surface. These tips are rounded and speckled and look just like the pebbles scattered on the ground where these plants grow. Other animals, including large animals like the gemsbok, take advantage of the desert’s intermittent fog by drinking moisture that collects on plants and rocks or the droplets of water that condense on their skin. Another beetle takes this a step further. It builds narrow trenches on the dunes at right angles to the winds that bring fog in from the coast. The ridges of these trenches collect more water than the surrounding sand, and the beetle moves from ridge to ridge drinking water. It can drink up to 41% of its body weight in water on foggy mornings. Beat the heat During the heat of the day, the long-legged beetle Onymacris plana runs across the scorching sand at a speed of 1m per second. Dashing from one tuft of grass to the next, the beetle creates extra wind over its body that lowers its temperature by up to 10ºC. But it must keep running. If it stood still for long, it would die of hyperthermia, abnormally high body temperature. As crazy as it might sound, this is the only land animal known to use exercise-induced cooling. To cope with the extreme heat radiating from dune surfaces the shovel-snouted lizard, Aporosaura anchietae, performs a fascinating ‘thermal dance,’ lifting two feet off the ground for a few seconds at a time in alternate fashion (left front foot with right rear foot, and vice versa). Another animal that appears to dance across the dunes is the sidewinder snake, Bitis peringueyi. Look for a beautiful broken s-pattern running up the dunes that marks the sidewinder’s movement across the sand. The pattern often ends near a tuft of desert grass where the snake curls its body and shimmies into the sand, leaving only its eyes exposed to lookout for prey. COASTODIANS • Caring for our coast, caring for our future Page 19 Environmental terms you need to know Many of the amazing plants and animals you’ve just learned about are endemic to the Namib Desert. Endemic means they live here and nowhere else in the world. It is also important to know that many of the special plants and animals found in the Namib Desert are considered vulnerable, threatened or endangered. These terms refer to the abundance of the specific plant or animal in its natural habitat, the degree of conservation protection it is getting, and how close it may be to extinction. Extinction is the complete disappearance of the plant or animal from the planet. Forever. An endangered species is any type of animal or plant that has so few individual survivors that it is in danger of extinction. Extinction is actually a natural phenomenon in the process of evolution. Over 90% of all species that have ever lived have disappeared, including dinosaurs. However, the rapid pace of extinctions that is now taking place is due entirely to human activities, such as pollution, hunting and the destruction of the natural areas that wildlife requires for survival for agriculture or/and urban development. Largely because of this rapid, often thoughtless development and pollution, wildlife species are being lost at an alarming rate about 400 times faster than at any time in history. These are some of Namibia’s endangered plants and animals living in our coastal environment that need our protection: Endangered Flora (plants) Fenestraria rhopalophylla, the window plant, grows on sandy plain habitat in the southern Namib but is sometimes found on gravel plains. Xanthoparmelia walteri, lichens, a combination of algae and fungi which stabilise the soil, are found on gravel plains between Swakopmund and Henties Bay. Lithops rushiorium, the stone plants, is part of the flora in the southern Namib known as the Succulent Karoo. From Lüderitz through the Richtersveld in South Africa, this area is rich in rare and endemic plant life and is considered one of the world’s biological “hot spots.” Page 20 COASTODIANS • Caring for our coast, caring for our future Welwitschia Mirabilis – a plant that can live for more than a thousand years …. if we let it! These ancient plants are found on the gravel plains from the Kuiseb River into southern Angola. Endangered Fauna (animals) Living in wetlands or on the shore: 8 African Black Oystercatcher 8 African Penguin 8 Bank Cormorant 8 Cape Gannet 8 Caspian Tern 8 Chestnut-banded Plover 8 Damara Tern 8 Great White Pelican Living in the ocean: 8 Benguela or Heaviside Dolphin 8 Green Turtle 8 Humpback Whale 8 Southern Right Whale 8 Leatherback Turtle Living on the plains: 8 Namaqua Chameleon Namaqua Chameleon Damara Tern Bottlenose Dolphin Leatherback Turtle DID YOU KNOW? The Succulent Karoo which stretches form southern Namib into South Africa is home to over 1 600 species of plants, making it a global biodiversity ‘hotspot’. Namibia is home to about 98% of the world’s population of Damara Terns. Of the 8 species of sea turtles found worldwide, 5 occur in Namibia. Most are considered endangered and are protected under the Sea Fisheries Act and international agreement. Of the 62 species of seabirds recorded in Namibian waters, 20 are rare vagrants (non-resident birds). Of the 11 species of baleen whales worldwide, 8 occur in Namibian waters and 23 species of dolphins and toothed whales can be found off the coast. (Toothed whales eat other animals such as seals, fish and squid. Baleen whales have thick, horny brush on their jaws through which they strain seawater to filter out and feed on microscopic plants and animals called plankton.) COASTODIANS • Caring for our coast, caring for our future Page 21 COASTODIANS CAN … • Ask your parents or your English teacher to help you write a letter to the editor of your newspaper expressing your concern for endangered species • Start an environmental awareness group at your school • Protect endangered species before it’s too late! Remember, extinction is forever. Activities Art • Find out more about an endangered species – present a poster or play to your class on a particular plant or animal’s importance and what can be done to protect it. Environmental studies • Make a list of species in your area ranging from common to rare to endangered – see how this compares to your classmates lists and discuss what you can to help protect these plants and animals! Outside • Plan a field trip to Gobabeb or Nadeet Page 22 COASTODIANS • Caring for our coast, caring for our future Chapter Five Wetlands: global importance, local magic Now you know about threatened, vulnerable and endangered species. Did you know that one of the best ways to protect these species is by protecting the area where they live? That’s right, and that is why it is important to know more about Namibia’s coastal wetlands. Why should we care about wetlands? Wetlands are important breeding, feeding, nesting and resting sites for migratory and resident birds. Migratory means moving from one region to another at a specific time of year, usually to breed or avoid bad weather conditions. Resident means birds and mammals, like us, that stay in a certain place year round. Wetlands are also home to mammals, reptiles, amphibians, fish and other flora and fauna, giving them an important role in helping to maintain Namibia’s biodiversity. Wetlands also help to maintain water tables for agriculture, they stabilise the shoreline and provide protection from storms, and they increase nutrients (wetlands provide eight times as much plant life as wheat fields). National pride, international recognition Namibia’s coastal environment is home to several wetlands of international importance. These are known as Ramsar sites. The Ramsar Convention is an international treaty for the conservation and sustainable utilisation of wetlands now and in the future. It recognizes the ecological, economic, cultural, scientific, and recreational value of wetlands. In December 1995, Namibia signed onto the Convention and the Walvis Bay wetlands were proclaimed the country’s first Ramsar site. Namibia’s Ramsar sites Walvis Bay wetlands including the Walvis Bay Lagoon, Pelican Point, the salt works and other nearby flooded areas cover an area of 35 to 40 km² (around 400 soccer fields). They are home to a large number of migrant birds and to more than half of southern Africa’s flamingos. Regular bird counts at the Walvis Bay wetlands have shown that numbers of wetlands birds vary from 37 000 to 79 000 individuals, peaking at about 150,000, a number which includes about 50 % of the world population of the Chestnut-banded plovers. COASTODIANS • Caring for our coast, caring for our future Page 23 But birds, fish and mammals share the wetlands, and our country’s most important fishing and commercial harbour at Walvis Bay, with joggers, domestic dogs, kite-surfers, windsurfers and other residents of Walvis Bay. This means that the protection of the wetland has to be balanced with the needs of industry and a growing population. The Coastal Environmental Trust of Namibia (CETN) placed information signs aimed at helping the public understand the importance of protecting the lagoon and wetlands. Located against the sand dunes and the sea just south of Walvis Bay within the Namib-Naukluft Park, Sandwich Harbour is another wetland of international importance. Sandwich Harbour’s northern wetland is sustained by water seeping from an aquifer beneath the dunes. This not only makes Sandwich Harbour unique, but it also maintains a freshwater wetland that supports 36 species of fish and a large bird population of shorebirds, waders and flamingos. Peak bird counts suggest up to 70 000 birds in summer. What makes Namibia’s third wetland of global significance special is that it is located along our shared border with South Africa at the Orange River Mouth. This perennial river forms a linear oasis through the semi-arid and arid Karoo and southern Namibia. It also supports many threatened species of birds including Damara Terns and Hartlaub’s Gull. Located far from the sea, the Etosha Pan is Namibia’s only inland Ramsar site. With seasonal rains and inflow of water from Lake Oponono and Cuvelai Drainage, the pan is an important nesting site for flamingos. But wait…. there’s more! All along Namibia’s coast there are interesting, important places that help to broaden, protect and support our nation’s biodiversity. Lüderitz Lagoon supports salt marsh vegetation and a number of different species of shore and sea birds. Oysters and crayfish, a source of food that Lüderitz is famous for, are also found here. Overharvesting (taking more out of the environment than can be replaced), pollution from the harbour and future industrial developments are potential threats to this wetland. The 30 km section of coastline from Swakopmund to Walvis Bay is designated as an Important Bird Area (IBA). During the summer months, this area has up to 770 birds per km, the highest linear count of birds anywhere in Southern Africa. It is the world’s most important breeding ground for endemic Damara Terns. These small birds are rated as “extinction possible” so protecting their breeding areas is a critical conservation effort. Page 24 COASTODIANS • Caring for our coast, caring for our future Guano platform The Swakop lagoon at the Swakop River mouth is fed by infrequent flooding of the ephemeral Swakop River. Over 85 bird species have been recorded in the vicinity of the Swakop lagoon. Cape Cross Seal Reserve and surrounding lagoons provides shelter and food for a large number of sea birds and seals. They also attract more than 100 000 tourists every year, making it an important contributor to Namibia’s economy! Salt works near Walvis Bay, Swakopmund and Henties Bay create artificial (not natural) wetlands and … jobs, so both people and birds benefit! Guano platforms off of Namibia’s coast are a safe place for birds and provide a moneymaking opportunity for Namibians. Guano, a rich fertiliser made from bird droppings, is collected and sold. This was one of the earliest industries along Namibia’s coast, and as long as birds visit these platforms, it is a renewable resource. Guano is also used in another unusual way. It is one of the ingredients in make-up (yes… make-up!). So it helps to make the land and us more beautiful! Pressures on Namibia’s wetlands Some of the most common threats to wetlands include: 8 Illegal or over fishing 8 Overgrazing 8 Industrial waste 8 Sewage waste 8 Pesticides and other forms of pollution 8 Poor mining practices 8 Dams 8 Human encroachment and a growing demand for resource 8 Invasive plants and animals 8 Poor town planning COASTODIANS • Caring for our coast, caring for our future Page 25 DID YOU KNOW? Internationally important wetlands are called Ramsar sites because the UN convention that adopted measures to protect wetlands was signed in 1971 in Ramsar, Iran. Namibia became a signatory to the Convention in 1995. Currently, there are 157 contracting parties to the Ramsar treaty. Globally, 1,708 Ramsar sites cover around 1,530,000 square kilometres – that’s an area larger than our entire country! Other potential Ramsar sites in Namibia include the Kunene River Mouth, the second richest coastal wetland for birds in our country, the Cape Cross Lagoons, the Mile 4 Salt works in Swakopmund and the Lüderitz Lagoon. COASTODIANS CAN … • Participate in a bird count at your local wetlands • Clean up rubbish around your wetlands • Read the newspaper to make sure that any proposed new developments in your town do not encroach on wetlands • Urge your municipality to adopt a conservation based water management plan • Urge industries to adopt clean, environmentally friendly working methods • Stop water pollution – keep wetlands, catchment areas and ground water sources clean! Activities English • have inter-class debates, where you not only challenge what you’ve been told but also get to draw your own conclusions. For example, under the topic of biodiversity, one topic for debate could be: Should the government spend money trying to protect endangered species such as Damara terns or would the money be better spent elsewhere? Get talking - think and debate! Outside • take a field trip to one of your local lagoons, river mouths and/or Ramsar sites to observe the variety of life in person! Page 26 COASTODIANS • Caring for our coast, caring for our future Chapter Six Environmental changes: natural and unnatural stresses on our coast Look outside. Is it sunny? Foggy? Hot? Cold? The environment changes constantly. Some changes are temporary, but there are changes that have a greater impact on our environment. How do these changes add up over the long term and how might they affect our environment? Though we haven’t got a crystal ball to look into the future, there are some alarming changes happening right now in the environment that we need to better understand. Climate change Climate change is a long-term change in our weather patterns. Namibia can be described as a hot, dry country. This is our average weather pattern over the years, but how might climate change affect us? The cold Benguela Current associated with our coastal regions is responsible for low rainfall yet brings dense fog to the region. Fog from the coast rolls across the Namib Desert an average of 60 days a year. This fog is very important as it supports a variety of plant and animal life. If the climate changed considerably and the Namib received less fog each year, it would have a significant impact on life in the desert. Global warming refers to an increase in the Earth’s average temperature. This affects the climate, leading to changes in rainfall patterns, a rise in sea temperature, sea levels, and a wide range of impacts to plants, animals and humans. With our long coastline, Namibia would certainly feel the affects of global warming. The Earth has warmed over the last 100 years. This affects the air we breathe, the water we drink, and scientists believe that the greenhouse gases (gases that trap heat such as CO2 – carbon dioxide) that we send into the air are increasing the speed of climate change and global warming. Changes to the temperature on land and in the sea can affect the environment and us by: 8Changing the patterns of fish distribution the fishing industry 8Altering wetlands bird, animal and plant life, agriculture and protection from storms 8Affecting populations of rock lobster and oysters restaurants and export products 8Rising sea levels coastal erosion, coastal development COASTODIANS • Caring for our coast, caring for our future Page 27 Sulphur eruptions, red tides and low oxygen events When bottom-dwelling bacteria in the ocean decompose or breakdown, they produce sulphur, a chemical element. When sulphur is concentrated, sulphur eruptions occur and create problems for Namibia’s marine environment, especially in the central region, between Cape Cross and Conception Bay. Sulphur eruptions give the air a pungent smell, turn the sea lime green in colour, and cause fish, rock lobster and shellfish to die. Complex chemical and biological processes such as sulphur eruptions are often associated with harmful algal blooms that cause even more deaths in fish and shellfish populations. Red tides are the decay of blooms that can create a highly toxic hydrogen sulphide in the sea. Red tides and sulphur eruptions are also the cause of low oxygen events in the seawater. When there is not enough oxygen in the water, fish and rock lobsters, are forced to escape. Problem is they have nowhere to go and end up washed up on our beaches. Maybe you’ve seen this happen and were able to pick up fish that had been washed ashore? DID YOU KNOW? In Kenya, Wangari Maathai started a project that has planted more than 40 million trees. She started the initiative to help woman find jobs and help the environment. In 2004, her hard work was recognized with a Nobel Peace Prize! In South Africa, shoppers must pay an extra 21 cents for each plastic shopping bag they take home. Germany produces more electricity from wind power than any other country. Unlike coal or oil, wind power is clean (no emission of CO2 ) and renewable. In Paris, France there are 20,000 clean, pedal-powered bikes for tourists and residents to rent. COASTODIANS CAN … • Walk, ride bicycles, carpool – uses less energy and get great exercise! • Recycle plastic, paper and glass so that fewer materials are needed to manufacture new goods and it helps reduce litter. Do not throw bottles and cans out of the window of the car. • Use fabric/cloth bags and limit the use of plastic bags, as they are one of the most abundant pollutants of our coastal desert. • Turn off the lights. • Consume products from Namibia. Less energy will be used in the process, and you’ll help the country’s economy too! Page 28 COASTODIANS • Caring for our coast, caring for our future Activities Environmental studies • Chart the weather patterns – draw graphs, charts and diagrams of weather patterns and compare them on a monthly basis. Climate change • Organise a small tree planting ceremony where students pledge to plant a certain amount of trees, and plant some that day. Math • Take a quiz to discover your “carbon footprint”. This is the amount of greenhouse gases you are responsible for releasing into the atmosphere. Then multiply this by the number of individuals then households in your town to get a figure that illustrates the amount of greenhouses gases emitted in your area. Outside • Take a walk around town. Ask students to think about whether or not their community includes any of the eco-resources from the list below and where they might be located: • Parks and green spaces • Pathways for walking, roller-blading, bike-riding • Public transportation • Cultural/historical sites • Second-hand stores • Landfills • Wildlife habitat • Nature Education sites/ facilities • Draw an eco-map of your neighbourhood indicating where these services/places are found. • When the students have completed their maps, discuss how often they visit their local parks, trails, educational sites, or second-hand stores. If they do not visit these places often, arrange a field trip to one or more of them. COASTODIANS • Caring for our coast, caring for our future Page 29 Chapter Seven Using our resources wisely Fish. Diamonds. Uranium. Tourists. These are resources at the core of the fishing, mining, and tourism industries. These are important industries, providing employment for Namibians and income for our nation. They also have an impact on the sea, the land, and our future. The type of impact they have – positive or negative – is up to us. Defining our resources A renewable resource is a resource that can supposedly last forever because it is replenished through natural processes. Fish, water, trees, grasses, fertile soil, wild animals and fresh air are examples of renewable resources. However, if a resource is used faster than it can be replaced, it can be depleted and converted to a nonrenewable resource. Non-renewable resources are resources that exist in fixed amounts on earth. They are formed over millions of years and cannot be replenished once they are used. Uranium, diamonds, marble, gas and oil are examples of non-renewable resources. Wise use and recycling can help extend the life and usefulness of our non-renewable resources. Fishing The Benguela current, an upwelling that brings cold nutrient rich water to the surface that occurs off the Namibian coast, results in one of the richest fish resource bases in the world. This renewable resource has the potential to contribute greatly to our economy, to generate employment and to feed many people. However, these fish stocks survive in a sensitive ecosystem whose balance can and has been disturbed by over-exploitation (over-use). Fishing can only be sustainable if it is managed properly. Quotas, established by Namibia’s Ministry of Fisheries and Marine Resources, set a limit for how many fish can be taken out of the sea and are based upon scientific research into the health and future of each type of fish. Quotas are important tools in protecting the future health of our fishing stocks as they help to make sure that enough fish are left to breed and allow the populations to return to their natural levels. Oil and diamonds are examples of nonrenewable marine resources, while seaweeds, oysters, rock lobsters and guano are renewable resources obtained from the sea. Careful management of all these resources is needed to insure that they are used wisely, benefit our economy, and that Page 30 COASTODIANS • Caring for our coast, caring for our future their extraction from the sea doesn’t upset the natural balance that is important for our environmental future. Diamond mining Diamond mining is a very important part of Namibia’s economy. It provides jobs, training and income for our nation. Yet, diamonds are a non-renewable resource and mining them takes a heavy toll on the natural environment. Large amounts of sand are moved during diamond mining operations. Removing diamonds from the coastline has resulted in the destruction of marine and coastal habitats as the sea is forced back to reveal its treasures. If not managed carefully, offshore mining has a negative impact as pollution from the moving of the sand affects the chain of life at the bottom of the sea. Inland mining Uranium mines are being developed in sensitive desert environments in our coastal regions. These mines require a huge amount of fresh water and electricity for production. They tap into our aquifers and, if not managed properly, could leave our water supply threatened. To support these mines, roads are built, and water pipelines and power lines are laid. This type of development leaves tracks on fragile gravel plains that can last for hundreds of years, long after the uranium, a non-renewable resource, is gone. The visual impact of uranium mines (power lines and water pipelines and the huge hole made for extracting the ore) has a negative impact on the tourism industry, a more sustainable activity. Remember, thousands of foreigners visit Namibia every year to enjoy our spectacular pristine desert. Would tourist continue to visit if the area was damaged? Other kinds of mining operations at the coast include salt and stone mining. They are generally smallscale mines but their visual impact adds up to lasting scars on our landscape. Tourism and coastal development The Namibian coast is an important destination for tourists. The tourism industry provides jobs, income and a chance for visitors to experience the wonders of our coastal environment. If tourists enjoy their time in our country, they will encourage others to visit. This makes tourism an important renewable resource. But in order to protect the renewable nature of tourism, we need to protect our environment. Uncontrolled off-road driving of quad bikes, motorbikes and 4x4 vehicles leads to the destruction of unique habitats, especially fragile lichen fields and breeding areas for endangered species, such as the Damara Tern. COASTODIANS • Caring for our coast, caring for our future Page 31 The pressure on seals, dolphins and recovering whale populations is increasing with the growing number of boat tour operators. Walvis Bay used to be a major breeding ground for Southern Right Whales before they disappeared from our waters through over harvesting in the early 1800s. Today these whales have a chance to recover here, if we do not interfere with them too much. Low flying aircraft that ignore height restrictions and no-fly zones over Ramsar sites and Important Bird Areas disturb shorebirds, flamingos and seabirds. Coastal development and the growing number of holiday homes threaten the area which supports more resident and migrant birds than any other stretch of beach in the country. These developments have already started to suffer the effects of coastal erosion, following higher tides and more frequent swell, a situation that will increase with climate change. We need to build homes in less sensitive areas and above a certain height, safely away from the high tide mark. Finding the balance Fishing, mining, tourism and other industries are important to people living along the coast and to our nation as a whole. But wetlands, ephemeral rivers, wildlife and bird populations, and our seas are equally as important. In terms of development and for our future, the needs of these man-made and natural components that make up our coastal environment need to be balanced. Finding this balance is key to sustainable development. Sustainable development is development that considers the needs of people in present times without depriving future generations of the means to meet their own needs. All people have basic needs for food, water, shelter and energy. As the world population increases, the earth is expected to provide more in order to fulfil these needs. The development that follows can be called sustainable development only if natural resources are used in such a way that they are not lost to future generations. DID YOU KNOW? Over 600 000 tourists visited Namibia in 2007 and approximately 1 million visited in 2008. The major threats to environment and biodiversity along the coast are: 8 Uncontrolled activities in protected areas and state lands such as mining & prospecting, tourism, recreational angling, off-road driving. 8 Land reclamation for urban and industrial development. 8 Marine pollution through mining & prospecting activities, fishing industry, oil & gas exploration & extraction, harbour activities. 8 Over fishing & over harvesting depleting our ocean resources. 8 Introduction of invasive alien species along our riverbeds and through mariculture development. Page 32 COASTODIANS • Caring for our coast, caring for our future COASTODIANS CAN … • Start a clean up campaign to remove alien plants from riverbeds and wetlands • Organize a poster campaign over the holiday period to educate holidaymakers about the environmental hazards of off-road driving • Create a project on the coastal environment for your science fair • Choose a career in the environmental field: nature conservation, water & waste management, control of pollution, renewable energy, management of marine resources, etc. • Plant a tree Activities Environmental studies • Ask parents who work in the fishing, mining, tourism or other industries that affect the coastal environment to come to class and discuss their jobs and what their companies are doing to protect the environment. Outside • Visit the harbour at Walvis Bay or Lüderitz to understand more about this industry and its impact on the environment. English • with the help of your teacher or parents, write a letter to the editor of your local newspaper expressing your thoughts and concerns regarding development and its impact on the coastal environment COASTODIANS • Caring for our coast, caring for our future Page 33 Chapter Eight Coastal conservation: the future in our hands Coastodians, the time to act is now! Namibia has the most extraordinary coastal environment and we are its coastodians. Working together, we can clean up, conserve and protect our world for future generations. Conservation describes the process of managing natural resources so that they are not degraded or destroyed, but are used in a sustainable way. Conservation of an area should take into account the needs of the local human population, together with the needs of the wildlife species and their habitat. This means setting priorities, finding a balance, and using our natural resources wisely. Conservation is key to our future! Coastal review Coastal region: Namibia’s coastline covers four administrative regions, namely: Kunene, Erongo, Hardap and Karas Regions. The entire coastal area is desert and much of it lies within protected areas. The hyperarid Namibian coastal ecosystem is home to a significant and unique array of biological and ecological diversity, including uniquely adapted plants and animals, and a high diversity of migratory shore and seabirds, including a number of endangered species. Concerns: Pollution, litter, climate change, over-fishing, bad mining, bad tourism and other forms of poorly planned coastal development are areas of concern that we have some control over. They affect our biodiversity – our wetlands, our air, our water, the unique plants that share our coast, our lives and our future. Choices: Making wise choices involves knowing where you stand in terms of environmental needs and our future. Using resources wisely and participating in activities that have a positive impact on our coastal environment can make a difference. Here are more ways to help protect the coastal environment: Page 34 COASTODIANS • Caring for our coast, caring for our future COASTODIANS CAN … SPREAD THE WORD – Talk to your parents, your friends, your local municipality and let them know that you are concerned about our coastal environment. They will be impressed! READ THE NEWSPAPER – Scan the newspaper for stories that concentrate on the environment and what our lawmakers and municipalities are doing to ensure a healthy, productive use of our natural resources. WRITE LETTERS TO THE EDITOR – Write to the editor of your local newspaper expressing your concerns about wetlands, conservation and development. Then check the papers to see when your letter appears. If it doesn’t, phone the editor to find out why it hasn’t! PROTECT OUR OCEANS – The world’s oceans have become one of the biggest dumping grounds for garbage in the world! In the Pacific Ocean there is a litter dump the size of the African continent! Worldwide over 300 different species of seabird, turtle, seal, sea lion, whale and fish have suffered from entanglement or ingestion in litter. Stop pollution! Organize clean ups. Make sure coastal industry in Namibia doesn’t dump waste in the ocean. KEEP OUR WATER CLEAN – In a dry country like Namibia, clean drinking water is in limited supply so it is important to keep poisonous materials out of the system. Clean water is essential for life! USE WATER WISELY – Remember recycle, reuse and reduce. Water is a limited resource! PROTECT OUR GRAVEL PLAINS – Stay on existing tracks, do not drive off road and protect the fragile lichen fields along the coast and the endangered birds, like the Damara Tern, who nest there. HAVE FUN FISHING – RESPONSIBLY - Get a permit from Namibia’s Ministry of Fisheries and Marine Resources (MFMR) to catch fish, collect bait/mussels or dive for rock lobster and respect harvesting limitations to insure the future of these renewable resources. By using our resources wisely today, it will help to ensure that you will be able to take your son and grandson for a fishing trip 25 years from now! KEEP OUR BEACHES CLEAN - Do not leave bait or fish on the beach because this food attracts scavengers like jackals and gulls who prey on nesting birds and other vulnerable parts of our biodiversity. Do not feed scavengers such as gulls, crows or jackals. Take your litter home. LEARN MORE! Read up on the biodiversity of the coast before visiting areas so you’re your actions aren’t harmful to the environment. You’ll have much more fun discovering new wonders along the coast. COASTODIANS • Caring for our coast, caring for our future Page 35 Activities English • Identify and classify wastes that result from human activity. Students can question how these items could be reused or recycled or how the user could have avoided using it in the first place. Chart the resources you use in a week into renewable and non-renewable lists – realize your personal use of resources and discuss how you can use resources more wisely. Environmental studies • Identify methods of waste disposal currently used within your community. Debate the merits of the various options and how waste management could be improved. Art • Reuse, reduce, recycle! Decorate cardboard boxes, turning them into dustbins that can be distributed to every class in the school. Outside • Connect with the coast! Take a walk on the beach, identify natural and unnatural materials that have washed up on the beach, discuss why they are there, whether or not they belong there and what can be done to clean up the beach. Web resources / references CETN: DRFN: IECN: MET: MFMR: NACOMA: NaDEET: Page 36 http://.www.cetn.com http://www.drfn.org.na http://www.iecn.org.na http://www.met.gov.na http://www.mfmr.gov.na http://www.nacoma.org.na http://www.nadeet.org COASTODIANS • Caring for our coast, caring for our future D id you know there are more birds living along Namibia’s coast than there are people in our country; that the average bath uses 90 litres of water but a five-minute shower only uses 20 litres; or that your actions – both good and bad – have an affect on our coastal environment and our future? Yes? No? The more you learn about Namibia’s coastal environment, the more you’ll want to know! Celebrating the wonders of Namibia’s coast, this book contains information on the usual and important nature of our coast, the industry and the life it supports, plus fascinating facts and a variety of activities to challenge you at school, at home and outside. From understanding your physical place in the environment to understanding how we are all connected to the land, the animals and each other through biodiversity, the topics in this book range from biology to conservation, from English to the arts. So be inspired, be challenged and become a Coastodian! Caring for our coast, caring for our future. ISBN 978-99945-68-99-4 Integrated Environmental Consultants Namibia Namibian Coast Conservation and Management Project (NACOMA)