open-water area fish will increase, but the yield of herbivorous fishes which lay eggs on aquatic vascular plants will somewhat decrease.
敞水性的鱼类增加,草食性鱼类或以水生维管束植物为产卵基质的鱼产量将下降。
the paper discussed the main reasons of declination of aquatic vegetation including the eutrophication, the excessive breeding of herbivorous fishes and the effect of human beings.