abundance - A measure of how common something is., community - All the different organisms living and interacting with one another in a particular area., ecosystem - An area in which all the living organisms and all the non-living physical factors in an area form a stable relationship that needs no input from outside the area to remain stable., food web - A diagram of interlinked food chains. It shows how the feeding relationships in a community are interdependent., habitat - The place in which an organism lives, e.g. woodland or sea shore., interdependent - When organisms in an area need each other for resources, e.g. for food and shelter., population - A group of one species living in the same area., quadrat - A square frame of known area, such as 1 m2, that is placed on the ground to get a sample of the organisms living in a small area., resources - Something that an organism needs to stay alive such as food, water and space., sample - A small portion of an area or population.,

SB9a Ecosystems

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