keystone species- a species on which other soecies in an ecosystem
largely depend such yhat if...
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keystone species- a species on which other soecies in an ecosystemlargely depend such yhat if it were removed the exosystem woukdchange drastically-> coral itself.
also need 1 heterotroph -> molluscs(ex.octopus/squid/seaslug
this is on coral reef
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A trophic cascade occurs when a keystone species is removed from an ecosystem A trophic cascade involves reciprocal changes in the relative populations of predator and prey through a food chain which often results in dramatic changes in ecosystem structure and nutrient cycling keystone species was defined by Paine as a species that has a disproportionately large effect on its environment relative to its abundanceIt has been defined operationally by R D Davic in 2003 as a strongly interacting species whose topdown effect on species diversity and competition is large relative to its biomass dominance
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