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What is a niche?
Is the range of physical and biological conditions in which a species lives and the way the species obtains what it needs to survive.
How does competition shape communities?
By causing species to divide resources, competition helps determine the number and kinds of species in a community and the niche each species occupies.
How do predation and herbivory shape communities?
Predators can affect the size of prey populations in a community and determine the places prey can live and feed.
Herbivores can affect both the size and distribution of plant populations in a community and determine the places that certain plants can survive and grow.
What are the three primary ways the organisms depend on each other?
Biologists recognize three main classes of cymbiotic relationships in nature: mutualism, parasitism, and commensalism.
Mutualism: to capture prey and protect the anemone from predators.
Parasitism: tapeworms live in the intestine of mammals, where they absorb large amounts of their hosts' food.
Commensalism: small marine animals called barnacles often attach themselves to a whale's skin.
What is the difference between a habitat and a niche?
A habitat is where an organism or a community of organisms lives, and a niche is the specific place and organism has in an ecosystem.
A habitat can help define the niche of a particular creature but cannot describe it entirely.
What is a competition?
When communities compete for resources, such as water, food, mates and places to live and raise their young.
What is a keystone species?
Changes in the population of a single species, that can cause dramatic changes in the structure of a community.
why can't two organisms compete if they live in different habitats?
Because they do not live in the same place.
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