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Ecosystem An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. It's also a system formed by an ecological community and its environment that functions as a unit.
population is the people living within apolitical or geographical boundary. in biology a community of animals, plants, or humans among whose members interbreeding occurs.
a community of animals, plants, or humans among whose members interbreeding occurs."fluctuations in populations of voles and lemmings"
Food chain the feeding relationships between species in a biotic community. also the series of processes by which food is grown or produced, sold, and eventually consumed.
Food web a diagram showing the organisms that eat other organisms in particular ecosystem, predators being higher in the web than their prey.