关键词: 嵊泗列岛, 潮间带, 群落生物量, 根系, 植物地上部分, 土壤, 枯落物, 植被恢复

Abstract: Studies on the benthic biocommunity in rocky intertidal zone of Shengsi archipelago show that under the influence of salt concentration and seashore spacious degree,there exist three kinds of biocommunities,i.e.,low,broad-and high-salt ones.The number of polychaetes shows an increasing trend from west to east.The density and biomass of molluscs are in the order of SS₄>HL₃ >SJ₂ >DY₁ and DY₁ >SJ₂> HL₃ >SS₄,and those of crustaceans are DY₁ >SJ₂> HL₃ >SS₄ and SS₄>HL₃ >SJ₂ >DY₁,respectively.The biomass of algae is all HL₃>SS₄>SJ₂>SY₁,and the number of polychaetes is in the order of midtide area >low-tide area>high-tide area at DY₁ and SJ₂, and of low-tide area>mid-tide area>high-tide area at HL₃ and SS₄.The biomass of molluscs,crustaceans and algae is all in the order of mid-tide area>low tide area >high-tide area.Algae biomass is the highest in spring and autumn, but lower in summer.The biomass of benthic invertebrates at sampling section DY₁ is higher in summer and autumn, but becomes lowest in winter.At SJ₂ and HL₃,it is maximum in spring and autumn,and at SJ₂ and HL₃,it is minimum in winter and spring.

Key words: Shengsi archipelago, Intertidal zone, Community biomass, vegetation restoration, root, soil, plant aboveground part, litter