Ecosystem
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- Any natural unit or entity including living and non-living parts that interact to produce a stable system through cyclic exchange of materials.
EPA - Cite This Source - This Definition - The complex system of plant, animal, fungal, and microorganism communities and their associated non-living environment interacting as an ecological unit. Ecosystems have no fixed boundaries; instead their parameters are set to the scientific, management, or policy question being examined. Depending upon the purpose of analysis, a single lake, a watershed, or an entire region could be considered an ecosystem.
EPA - Cite This Source - This Definition - relationships between and among living organisms and their non-living environment.
NCDC National Climatic Data Center - Cite This Source - This Definition - abiotic, biosphere, Biotic, Environment, Histosol, photosynthesis, Polyvinyl chloride (PVC), Population, Respiration, Soil
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