nonliving parts of an organism's enviroment; temperature, moisture, light and soil
portion of earth tha supports life; extends from the atmosphere to the bottom of oceans
all the living organisms that inhabit an enviroment
an ecological relationship in wich one organism benefits and the other neihter benefits nor is harmed
collection of several interacting popultions that inhabit a common enviroment
scientific study of interactions amoung organisms and their enviroments
interactions amoung populations in a community; the community's physical surroundings' or abiotic factors
place where an organism lives out its life
a form of symbiosis in wich both organisms benefit from living togeather
role and position a species has in its environment; includes all biotic and abiotic interactions as an animal meets its needs for suvival and reproduction
symbiotic relationship in which one organism benefits at the expense of the other species
group of organisms of one species that interbreed and live in the same place at the same time
permanet, close association between twoor more organisms of diffrent species
organisms that use energy from the sun or energy stored in chemical compounds to manufacture their own nutrients
organisms, such as fungi, that break down and absorb nutrients from dead organisms
beginning with procedures along wich energy is transferred from trophic level to troshic level
the interconnected food chains in an ecosystem
organisms that cannot make their own food and must feed on other organisms for energy and nutrients
animals that feed on animals that have already died
a feeding level in an ecosystem
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