Snail-epiphyton Interaction and Its Effects on Submerged Macrophytes

Abstract

Abstract: 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.

Key words: alpine plant, photosynthetic apparatus, photo-protection, adaptation mechanism.

You Wenhui. Snail-epiphyton Interaction and Its Effects on Submerged Macrophytes[J]. cje, 1999, (3): 54-58,74.

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