Savannah’s are located on both sides of the equator in country's and region’s like : Africa, Zambia, Leone, Sudan, and the central American republic (ect) Overgrazing and farming have destroyed much of the savannah. When overgrazing occurs the grasses don’t grow back and the savannah can turn into a desert. In Africa the Sahara desert is expanding into the savannah at the rate of mpy (miles per year A savannah is a rolling grassland scattered with shrubs and isolated trees. Most savannah’s are located in Africa and the most well known the serngeai in Tanzania http://freewallsource.com/savannah-10830.html www.blueplanetbiomes.org/savannah.hltm www.brainpop.com www.ducksters.com/science/ecosystem/savannah_biome.ph p www.plantpatrol.info/savannah.hltm By Alexandra Mercurio Climate Overview The main seasons are dry and wet, during the rainy season the savanna is lush and rivers typically overflow and bring water to plants and animals. In the dry season water may be scarce and there can be a drought which can effect plants and animals. Dry Season A drought can cause loss of water and other resources. The water can be dried out for months but it will generally return when there is heavy rain in the rainy season. Wildfires can also cause damage to savannas' caused by droughts. A lack of water is called a drought which can happen mostly in the dry season. The dry season happens from October to May. In the dry season it is also a bit cooler then the wet because it takes place during what would be our winter. Wet Season The wet season usually happens from November to April. The rainfall in the savanna can be 20-50 inches of rain. Most of the rain comes from the rainy season but it can rain in the dry season. However it won’t rain as much as it might in the other season. A period before the wet season is called a build up. The build up is a time between August and November where the humidity increases and there can be thunder storms and even lightning. Wind Velocity Dust storms can happen in the savanna and is more possible to happen in a dry season. Dust storms can be caused by when a strong wind blows dust around particles start to vibrate and dust or sand blows everywhere! Weather Patterns The savanna has two seasons instead of four, but they have at wet season and dry season. But these seasons are different then ours because these biomes are typically closer to the equator. There winter is a dry season and it is very hot, but the wet is a bit more humid then being hot. Therefore, a dry season is more likely to have heat and droughts and the rainy season can more likely have humidity, heavy rainfall, and floods. Temperature During the wet season it is somewhat more humid then it would be in the dry season because with rain normally comes humidity, This humidity can mean that it may be more hot then the dry season. During this season the average temperature is 70 – 90 In the dry season it is sometimes cooler than the wet season and it doesn't have much humidity but it does have heat. The average temperature is 60 – 80. Weather Impact The weather has impact on in the: Wet season - During this particular season many plants thrive and soak up the water and animals can drink more water. However some plants or animals may dominate by extra food/water and change food chains. During the dry season if there is a drought most animals can’t survive the loss of water. Plants will be expected to die if they don’t need much water. And loss of water can lead to dying animals which can lead to food chains changing as well as in the rainy season. If any animals survive on supplies of fish they can also be seriously impacted. Sites used http://www.savanna.org.au/all/climate.html -Slides 5 and 6. http://savannatprimosch.weebly.com/precipitationtemperature--soil.html - dry season facts and precipitation (3 and 4) http://www.blueplanetbiomes.org/savanna.htm .Slides 2 and some of 8 http://www.blueplanetbiomes.org/savanna_australiacl imate.htm - 7 Savanna-Plants Mia Different Plants The Majority of the biome is grass, often they grow 3-6 feet tall. There are not many trees in the savanna because wildfires and droughts often stop the trees from growing. The Umbrella Thorn Acacia Tree http://thegreatsavanna.weebly.com/savanna-plants.html Kangaroo Paw http://upload.wikimedia.org/wikipedia/en/a/ab/Kangaroo_paws_darling_range.JPG http://trade.indi amart.com/detail s.mp?offer=4328 571062 Elephant Grass http://3.imimg.com/data3/JB/QC/MY-2604841/elephant-grass-seeds500x500.jpg http://www.google.com/search?q=Red+fescue&safe=acti ve&client=firefox-a&hs=B9i&rls=org.mozilla:enUS:official&source=lnms&tbm=isch&sa=X&ei=Dd79VJSh Msr3yQTsw4GYBQ&ved=0CAcQ_AUoAQ&biw=1280&bi h=661#imgdii=_&imgrc=1nplRpEncxtQAM%253A%3Brf UsnZ-PdS9qyM%3Bhttp%253A%252F%252Fyac wag.org.uk%252Fwpcontent%252Fuploads%252F2012%252F06%252Fredfescue.jpg%3Bhttp%253A%252F%252Frosarubicondior.blo gspot.com%252F2014%252F07%252Fevolution-arms-racemoose-spit-detox.html%3B1600%3B1200 Red Fescue https://farm4.staticflickr.com/3652/3542304350_2aa3417df1_z.jpg Aloe Marlothii http://pics.davesgarden.com/pics/2012/02/11/palmbob/4a51e3.jpg http://www.plantza frica.com/vegetation /savanna.htm Lala Palm http://media-cacheec0.pinimg.com/736x/55/af/f6/55aff659e1ce730d70a03cbc77ccd3d4.j pg Pitcher Plant http://cdn-1.carnivorous--plants.com/images/pitcher-plant.jpg Davill Eliptica t0.gstatic.com/images?q=tbn:ANd9GcS37v9q10bhhIlgYnW0TzZomlqaUpL9cJvZCKCncZGw WvrMXhGa2w Stemless Palm http://cdn.c.photoshelter.com/img-get/I0000wGu8mBATMZo/s/860/860/brazil-cerradopalm-attalea-JNGX0700.jpg Iron Wood http://www.marietta.edu/~biol/biomes/images/grassland/tironweed.jpg Dogbane seed pod: http://www.marietta.edu/~biol/biomes/images/grassland/dogbane_7299.jpg Plant Adoption » The Plants in the savanna have adapted to common drought circumstances, by putting their roots deep in the ground to find water below the surface. This helps them survive in the savanna. » The roots of the plants are so deep in the ground that even during wildfires the will remain unharmed. » The plants in the savanna are known for their bright and colorful flower that bloom exclusively to get pollen. » The leaves of a lot of the plants in this biome are small and narrow, this is to make sure little loss of the heat in the daytime. http://www.buzzle.com/articles/grassland-biome-animals-and-plants.html Abiotic Factors: soil, climate, sunlight Credits: http://oaksavannas.org/savanna-ecology.html http://www.softschools.com/facts/biomes/savanna_biome_facts/163/ Soil Most Soil in the savanna is dry, some plants that cant survive in such soil may die during this season and grow back during rainy seasons. Crops are not found in the savanna because they cant grow in the dry soil. There are many different types of Soil in the Savanna, the major ones are: lateritic soils cracking clays deep sands alluvial soils Climate Plants vary in there temperature needs. Some are cool weather plants and others warm weather plants. Trees may loose there leaves so that there is a minimum water loss during dry seasons. When there is a lot of rain it could flood the plants and they could die. Sun light When direct sunlight hits the ground, the water in the soil evaporates, giving the plants little water. Drought resistant plants may be able to survive, but plants that cant survive without a lot of water may die. Sunlight gives plants Nutrients. Grey-green/ pale coloring of the bottom of the leafs helps reflect the sun away so there is a minimum loss of water. Giraffes, Hippos and Elephants Wild African Dogs, Meerkats and Lions Jackals, Ostriches and Warthogs Termites Termites are responsible for keeping nutrients for the producers and keep the food chain rolling. Primary consumer: Deer Secondary consumer: Cougar Primary consumer: Rodent Secondary consumer: Fox Hippo have very sensitive skin and the sweat reddish oil to keep it from drying out. Hippos spend most of the day sleeping underwater and bathing in rivers or lakes. At night Hippos come out of the water to graze on grass beside the shores of the river or lake. Water Availability: Water is scarce during the winter-dry season but in the summer there is plenty of water to go around. So the in the winter-dry season animals store and conserve food and water. In the summer animals gather around a pond or lake and drink. Also carnivores are on the prowl in the summer again. http://kids.nceas.ucsb.edu/biomes/sava nna.html http://www.planetpatrol.info/savannah. html http://www.outtoafrica.nl/animals/enghi ppo.html https://images.google.com/