Community ecology of intertidal zone of Shengsi archipelagoⅠ.Species constitution and seasonal variation of benthic biocommunity in rocky intertidal zone

Abstract

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

Yang Wanxi, Chen Yongshou. Community ecology of intertidal zone of Shengsi archipelagoⅠ.Species constitution and seasonal variation of benthic biocommunity in rocky intertidal zone[J]. Chinese Journal of Applied Ecology, 1996, 7(3): 305-309.

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