In addition, the macroalgae served as a primaryproducer in the paleoecosystem to provide an alternative food for the metazoarl.
同时，宏体藻类作为生态系统中的初级生产者成为一种新的食物，改变了后生动物的食谱。
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Phytoplankton is the main food to the bivalve filter-feeders and the marine primaryproducer, so the impacts on the phytoplankton community by scallop culture deserve studying.