螺类与着生藻类的相互作用及其对沉水植物的影响

浅水湖泊的富营养化常导致水生植被的退化与浮游藻类的爆发［１０，１８，２９］。可利用光通常是决定沉水植物分布、生物量和生产力的最重要因子，因此，伴随高营养负荷的浮游藻类繁殖，极大地削弱了沉水植物的光合能力［２０］。然而，Ｐｈｉｌｉｐｓ等人［２８］认为，...

Snail-epiphyton Interaction and Its Effects on Submerged Macrophytes.

Epiphyton-feeding snails are often a conspicuous feature of the invertebrate fauna associated with submerged freshwater macrophytes. This paper reviewed the different interactions among snail, epiphyton and macrophytes.Studies on grazing by freshwater snail show that snails have a great impact on the biomass, productivity and species composition of epiphytic communities. Direct effects of the grazing on living macrophytes are probably of minor importance, but snails have a significant indirect effect on macrophytes by reducing the detrimental impact of epiphyton(e.g. shading and competition for nutrients). Predaters of snails can have a mediating effect on snail-epiphyton-macrophyte interactions, both through a direct predator-prey relationship (reducing the density of snails) and by inducing a habitat displacement of the snail.