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an assemblage of all populations of organisms living close enough together for potential interaction
relationships between different species -- affect population structure and dynamics
occurs when the niches of two populations overlap and both populations need a resource that is in short supply
Trophic Structure Order
producers - primary consumers - secondary consumers - tertiary consumers - quaternary consumers
a species whose impact on its community is much larger than its biomass would indicate
the transition in species composition of a community, often following a disturbance
spread further beyond the original point of introduction and cause environmental or economical damage
consists of all the organisms in a community as well as the abiotic environment with which the organisms interact
the amount of solar energy converted to chemical energy in organic compounds by an ecosystem's producers for a given area during a given period
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