biomass - the total dry mass of organic matter in organisms or ecosystems, gross production - total amount of energy accumulated at a trophic level , net production - The amount of organic matter remaining after respiration. , pyramid of energy - ecological pyramid that shows the energy flow through each trophic level, primary succession - the series of changes that occur in an area where no soil or organisms exist , secondary succession - the series of changes that occur after a disturbance of an existing ecosystem , biome - large geographic region with similar climate, plants and , biosphere - All life on earth , simpson - name of diversity index which takes into account both richness and evenness ,
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