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Role or position a species has in its environment; includes all biotic and abiotic interactions as an animal meets its needs for survival and reproduction
collection of all the organisms that live in a particular place, together with their nonliving (abiotic) environment
symbiotic relationship in which one member of the association benefits and the other is neither helped nor harmed
symbiotic relationship in which one organism lives in or on another organism (the host) and consequently harms it.
growth pattern in which the individuals in a population reproduce at a constant rate
Population growth pattern that begins with rapid growth, and slows down as the environmental carrying capacity is reached; characterized by an S-shaped curve when graphed.
a natural community of plants and animals, its composition being largely determined by climatic conditions.
orderly natural changes and species replacements that take place in communities and ecosystems over time
succession following a disturbance that destroys a community without destroying the soil
an immediate increase in the amount of algae and other producers that results from a large input of a limiting nutrient
Pyramid of energy
an ecological pyramid that shows the energy flow through each trophic level in an ecosystem (10%)
Pyramid of biomass
illustrates the relative amount of living organic matter available at each trophic level in an ecosystem
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