Grizzly bears hibernate for 5 to 7 months each year (except where the climate is warm, as the California
grizzly did not hibernate). During this time, female grizzly bears give birth to their offspring, who then
consume milk from their mother and gain strength for the remainder of the hibernation period.
The grizzly bear was once seen to populate the entire western coast of North America, from Alaska to
Mexico. However, today the grizzly bear is found predominately in Alaska and western Canada.
MIGRATION: Grizzlies hibernate rather than migrate. Males disperse to set up new territories or reclaim
lost habitat; females are presumed to disperse over shorter distances. Grizzlies can travel dozens of miles;
territory sizes are thought to be a function of food density.
THREATS: Most threats faced by the grizzly stem from habitat degradation by development, logging, road
building, oil and gas drilling, livestock grazing and other resource exploitation. Grizzlies are also
significantly threatened by predator control. In the Yellowstone region, a primary bear food source, the
white bark pine nut, is in decline due to pine bark beetle infestations that are exacerbated by global
warming.
---------------Grizzlies hibernate rather than migrate. They hibernate for 5 to 7 months each year (except where the
climate is warm, as the California grizzly did not hibernate). The grizzly bear was once seen to populate
the entire western coast of North America, from Alaska to Mexico. However, today the grizzly bear is
found predominately in Alaska and western Canada. Bears play the role of consumer in food web. Bears
are omnivores, meaning they get their energy from both producers and other consumers. Bears are
important links in food webs and help maintain populations of deer and other prey species through
predation.
In the world of flora and fauna, living under nature's "rules of the jungle" (so to speak), there are predators
and prey, and there are symbiotic relationships.
Explains where and why it migrates
Hummingbirds migrate because they are unable to withstand freezing temperatures for extended periods
of time. They have an amazing adaption to help them survive the unexpected, though. If cold weather
sets in early, or a belated lingerer faces an unexpected cold spell, hummingbird bodies will essentially shut
down all non-essential functions (including breathing for a short time).
Hummingbirds migrate alone, not as a group, so they can't learn routes from one another. Hummingbirds
migrate because it is an innate, genetic instinct. Factors such as weather (they are unable to withstand
freezing temperatures for extended periods of time), length of daylight, & fat accumulation stimulate
migration. Many species of hummingbirds spend the winter in Central America or Mexico. They begin to
migrate north to their breeding grounds in the southern U.S. and western states as early as February, and
to areas further north later in the spring. Some hummingbirds that live in warmer areas like California do
not migrate. When they migrate, they fly low and fast, traveling as many as 23 miles per day. In order to
have energy to make the journey, a hummingbird will consume copious amounts of food and gain 25-40%
of its body weight as energy stores. Birds use the magnetic fields of the earth to help them navigate.
Hummingbirds migrate alone, not as a group, so they can't learn routes from one another. They migrate
because it is a genetically programmed instinct. Factors such as cold weather, length of daylight, & fat
accumulation stimulate migration. Many hummingbird species spend the winter in Central America or
Mexico. As early as February, they begin to migrate north to their breeding grounds in the southern and
western U.S., and later in the spring and summer. Hummingbirds that live in warmer climates, such as
California, do not migrate. To make the journey, a hummingbird will consume copious amounts of food
and gain 25-40% of its body weight as energy stores. Birds use the magnetic fields of the Earth to help
them navigate.
Explains role species plays in food web
Hummingbirds are omnivores, meaning they eat both plants and other animals such as spiders, tiny flies,
gnats, and aphids. Omnivores are the other type of secondary consumer.
Why species is important to food web with at least 2 specific details
Hummingbirds (family Trochilidae) are amazingly adapted pollinators and they play an important role in
pollination. They drink up to two times their body weight per day. As they move from plant to plant, they
carry pollen. If plants do not pollinate, fertilize and reproduce, they will die. Furthermore, other species
that rely on plants, including humans, will be impacted. For example, if hummingbirds become extinct,
mites may become extinct as well because they would no longer be able to move from flower to flower.
The flowers will then become extinct because they rely on hummingbirds and mites to spread pollen. In
fact, if all of the affiliate species on the endangered list that are expected to become extinct are not saved,
an additional 6300 species become endangered.
Clearly explains problems and challenges species faces due to global changes.
Hummingbirds are a prime example of a species that is imperiled by climate change and deforestation.
Their food sources are restricted to specific temperature ranges. Hummingbirds will be forced to migrate
to higher elevations if the world continues to warm.
Explains what is being done to help species survive now with at least 3 accurate details and evidence of
research.
According to research, reforestation, limiting the use of pesticide and creating urban gardens are the best
ways to help protect hummingbirds. As a result, Hundreds of thousands of acres of isolated patches of
land have been reforested and reconnected, allowing species to migrate.
Limit Pesticide Use. Just like any animal, hummingbirds are vulnerable to ingesting and absorbing
pesticides. ...
Position Your Hummingbird Feeders to Avoid Predators. ...
Change Hummingbird Food Regularly. ...
Know What to do with Windows. ...
Set a Cleaning Routine.
Plants, including trees, do not truly migrate; rather, they disperse their seeds, which can take root in new
locations if growing conditions are favorable. Furthermore, they must move in order to grow, catch
sunlight, and, in some cases, feed. Plants move in a variety of ways, one of which is known as
phototropism. They essentially move and grow toward the light. A food chain always begins with a
producer, which is an organism that produces food. Because plants can produce their own food through
photosynthesis, this is usually a green plant. Plants are thought to be producers in the food web. Many of
the animals in the environment only eat plants. Animals that live on plants are eaten by other animals.
Plants, on the other hand, produce their own food in the presence of sunlight by utilizing water and carbon
dioxide from the atmosphere. This means that plants are the foundation of every food chain.
Plants face problems and challenges as a result of human activities that aggravate the situation. The
causes of deforestation can be either direct or indirect. Natural causes such as hurricanes, fires, parasites,
and floods are examples of direct causes. Human activities such as agricultural expansion, mining, oil
extraction, dam construction, and infrastructure development are examples of human activities. Plants
are extremely beneficial to the environment and all living things. Plants provide us with food, materials
for shelter, fuel to keep us warm, and oxygen to breathe.
Many species of beetles are able to hibernate. This is a common trait among these insects, and their
reasons for doing so are generally the same. Adult beetles are looking for a secure, dry area that will
protect them from both the cold air and any predators that are able to survive the winter, such as spiders.
Beetles and their larvae help facilitate natural composting. They are prominent decomposers, especially
in forests feeding on dead animals and fallen leaves, thereby recycling the nutrients back to the soil. As
predators, they reduce populations of problem insects, especially caterpillars.
All earthworms do more than just burrow to escape frozen ground. Once down as deep as they will go,
they curl up tightly, surrounding themselves in insulating slime. Earthworms burrow deeply in the winter,
just as they do during a drought (dry soil conditions). During hot and dry spells in the summer, they enter
a hibernation-like state known as estivation, which is similar to bear hibernation. The worms hibernate in
the winter, waiting for the soil to thaw before moving upward. Earthworms improve soil aeration,
infiltration, structure, nutrient cycling, water movement, and plant growth by increasing soil aeration,
infiltration, structure, and plant growth. Earthworms are important organic matter decomposers. They
are fed by microorganisms that live on organic matter and in soil material.
The disappearance of earthworms means poor soil fertility, lower crop yields and loss of carbon from the
soil, a factor exacerbating climate change. It also partly explains the crash in the song thrush population,
which relies on this type of worm to feed its young in the spring.
Earthworms make it possible for us to live on the planet, simply by eating and pooping, and ploughing up,
ventilating and fertilizing the soil along the way. ... Arguably without earthworms in our soils, life could
vanish pretty quickly. We would have less food, more pollution, and more flooding.
The extinction of earthworms results in poor soil fertility, lower crop yields, and carbon loss from the soil,
all of which exacerbates climate change. Different levels of rainfall can also have an impact on soil during
climate change. If the soil becomes saturated from too much rain, the earthworms may drown. If there
isn't enough rain, the earthworms will dry out and die. That is another reason why earthworms can die
when the climate changes dramatically.
As per research, we can encourage earthworm populations on farms by reducing cultivation frequency
and intensity, as cultivations bury their food supply, can directly kill worms, and damage eggs. Moreover,
because worms are sensitive to acidity, we must correct soil problems by preventing pH from falling too
low.