close living association between two species

the rate of photosynthesis of the producers in n ecosystem

the conversion of inorganic carbon into organic carbon substances

the conversion of CO2, water and energy into organic material and O2

deep ocean trench zone

zone where continental shelp drops

grams of organic carbon fixed by photosynthesis under a sq. meter of sea per day

the zone above inter tidal zone

organism that swim against the current

hetertrophs that feed on autotrophs

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