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Habitat. Type of environment in which a population or species regularly lives WHERE it lives Monkey – tropical rain forest Frog – pond Palm tree – tropical beach. Habitat. Habitat. Habitat. Niche. The role of an organism in the ecosystem What it does
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Habitat • Type of environment in which a population or species regularly lives • WHERE it lives • Monkey – tropical rain forest • Frog – pond • Palm tree – tropical beach
Niche • The role of an organism in the ecosystem • What it does • Spider –makes webs and eats insects • Oak tree – form part of the forest and produce acorns • Humpback whale – eat plankton and krill
Niche • Competition • If two species try to share the same niche in the same habitat, they will compete for resources
Niche • Competitive exclusion • The extinction of a population due to direct competition with another species for a resource
Niche • Realized niche • The actual role that the organism filling • Fundamental niche • Any of the roles that an organism can fill
Niche • Niche Diversity • The number of different niches in an ecosystem • Depends on type of biome
Niche • Predator • An organism that actively hunts other organisms • Keystone Predator • A predator that promotes a great niche diversity in its habitat • Prey • The organism that is hunted
The sea otter Enhydralutris can be considered a keystone predator because its voracious feeding on herbivorous sea urchins allows kelps to flourish along the rocky coast, along with an entire ecosystem associated with these large marine plants.
Convergent Evolution converged
Divergent Evolution Journal
Fundamental vs. realized niche Chthalamus barnacles can live in both deep and shallow intertidal zones (its fundamental niche). Competition from Balanus forces Chthalamus to occupy a smaller realized niche on higher, drier habitat.
