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A group of interdependent organisms inhabiting the same region and interacting with each other
the conversionn of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria
the movement of phosphorus from the nonliving environment into living things and then back into the nonliving environment
single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem
any nonliving component of an environment, a nonliving factor or element (e.g., light, water, heat, rock, energy, mineral).
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