– Biomass refers to the total weight of living matter that exist at each trophic level of an ecosystem at a particular time regardless of species. For example, all autotrophs (including autotrophic bacteria, grasses, trees, shrubs and herbs) belong to one level; all primary consumers (herbivores) at another level, etc. Biomass at each level decreases as one moves up the food chain (from producers to consumers)
– Standing crop refers to the total weight of organisms belonging to a particular species in ecosystem at a given time. It’s species dependent for example, the total number of lions, elephants, grass, etc that can be harvested at a given time within a trophic level.
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