Ulva pertusa, a kind of marine macroalgae, is a preponderant algae in Chinese sea area.
孔石莼是一种资源量较大的大型绿藻，在我国主要海区均是优势物种。
2
In addition, the macroalgae served as a primary producer 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。
3
Macroalgae compose the important parts of primary production near the sea, and the photosynthesis and growth of which are affected by many kinds of environmental factors.