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25 Cards in this Set

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Community

a group of people living in the same place or having a particular characteristic in common.

Ecosystem

a biological community of interacting organisms and their physical environment.

habitat

the natural home or environment of an animal, plant, or other organism.

biodiversity

the variety of life in the world or in a particular habitat or ecosystem.

succession

a number of people or things sharing a specified characteristic and following one after the other.

climate

the weather conditions prevailing in an area in general or over a long period.

biome

a large naturally occurring community of flora and fauna occupying a major habitat,

producer

An autotrophic organism that serves as a source of food for other organisms in a food chain.

consumer

Consumers are organisms of an ecological food chain that receive energy by consuming other organisms.

decomposer

organisms that break down dead or decaying organisms, and in doing so, carry out the natural process of decomposition.

trophic level

the position that an organism occupies in a food chain

energy pyramid

An energy pyramid is a graphical model ofenergy flow in a community

Population

all the inhabitants of a particular town, area, or country.

carrying capacity

the number of people, other living organisms, or crops that a region can support without environmental degradation.

predation

the preying of one animal on others.

coevolution

the influence of closely associated species on each other in their evolution.

patasitism

one species, the parasite, benefits at the expense of the other, the host.

symbiosis

nteraction between two different organisms living in close physical association, typically to the advantage of both.

mutualism

symbiosis that is beneficial to both organisms involved.

commensalism

an association between two organisms in which one benefits and the other derives neither benefit nor harm.

niche

a certain place to live

fundamental niche

viable population of a species occupies in the absence of competition from other species.

realized niche

Some species are not able to occupy their entire niche because of the presence or absence of other species.

competitive exclusion

the inevitable elimination from a habitat of one of two different species with identical needs for resources.

keystone species

a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.