Biosphere The part of the planet Earth where life occurs, including land, sea and air.
Ecosystem A reasonably self-contained area together with all its living organisms, e.g. oak forest,deep sea, sand dune, rocky shore, moorland, hedgerow, garden pond, etc.
Habitat The physical or abiotic part of an ecosystem, i.e. a defined area with specificcharacteristics where the organisms live. Most ecosystems have several habitats.
Microhabitat A localised specific habitat within a larger habitat e.g. under a rotting log, in a rock pool,etc.
Terrestrial An ecosystem on dry land
Aquatic An ecosystem in water
Marine An ecosystem in the sea
Community The living or biotic part of an ecosystem, i.e. all the organisms of all the different species living in one habitat.
Biotic Any living or biological factor.
Abiotic Any non-living or physical factor.
Population The members of the same species living in one habitat.
Species A group of organisms that can successfully interbreed
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