CAJ | 학술논문

根据2008、2010、2013年3个年度春季在安海湾及邻近海域7个站位的生态调查数据，对该海域的大型底栖动物种类组成及其群落变化进行研究．结果表明：调查海域春季大型底栖动物共计198种，种类组成上以多毛类和甲壳动物为主，不同年度的物种数由2008年的98种逐次增至2013年的118种，且软体动物比例呈上升趋势．单因素相似性分析表明3个年度的群落结构不存在显著差异，但历年调查的优势种组成已有所变化，尤其是2013年的优势种明显不同于前2个年度．3个年度的平均密度介于369～780个／m2，平均生物量介于23．22～40．10 g／m2，物种丰富度指数 d 介于3．693～4．265，多样性指数 H′介于3．076～3．782，密度逐次降低，生物量2010年最低，而物种丰富度指数 d 和多样性指数 H′呈现2010年最高，前后年度低的特点．空间分布上，安海湾外的站位平均物种数和多样性指数 H′高于湾内．聚类结果表明，安海湾内外的群落相似性低，且优势种组成明显差异．与1989年相比，安海湾底栖动物群落发生明显改变．迹象表明，较之前2个年度，2013年安海湾底栖动物群落出现新变化．
근거2008、2010、2013년3개년도춘계재안해만급린근해역7개참위적생태조사수거，대해해역적대형저서동물충류조성급기군락변화진행연구．결과표명：조사해역춘계대형저서동물공계198충，충류조성상이다모류화갑각동물위주，불동년도적물충수유2008년적98충축차증지2013년적118충，차연체동물비례정상승추세．단인소상사성분석표명3개년도적군락결구불존재현저차이，단력년조사적우세충조성이유소변화，우기시2013년적우세충명현불동우전2개년도．3개년도적평균밀도개우369～780개／m2，평균생물량개우23．22～40．10 g／m2，물충봉부도지수 d 개우3．693～4．265，다양성지수 H′개우3．076～3．782，밀도축차강저，생물량2010년최저，이물충봉부도지수 d 화다양성지수 H′정현2010년최고，전후년도저적특점．공간분포상，안해만외적참위평균물충수화다양성지수 H′고우만내．취류결과표명，안해만내외적군락상사성저，차우세충조성명현차이．여1989년상비，안해만저서동물군락발생명현개변．적상표명，교지전2개년도，2013년안해만저서동물군락출현신변화．
Based on the ecological survey at 7 stations in Anhai Bay and its adjacent sea in springs of 2008,2010 and 2013,macrobenthic species composition and community structures were analyzed.The results showed that a to-tal of 198 macrobenthic species were recorded and it was dominated by polychaetes and crustaceans.The total spe-cies number increased gradually from 98 in 2008 to 118 in 2013 with the increment of molluscs.There was no sig-nificant difference in community structure among years except for dominant species,especially in 2013 when domi-nant species completely differred from 2008 and 2010.The average densities of macrobenthos was from 369 inds/m2 and 780 inds/m2 ,the average biomass from 23.22 g/m2 to 40.10 g/m2 .Margalef species richness index ranged from 3.693 to 4.265,and Shannon-Wiener diversity index from 3.076 to 3.782 in these 3 years.Density declined gradually while biomass was the lowest in 2010.Margalef richness index and Shannon-Wiener diversity index showed the values were higher in 2010 than in 2008 and 2013.The species numbers per station and Shannon-Wie-ner diversity index H′were generally higher in the outer than the inner Anhai Bay by spatial distribution.Cluster a-nalysis showed that the similarity of community structures between the inner and the outer Anhai Bay was low and composition of dominant species were quite different.Recent macrobenthic communites changed significantly com-pared with that in 1989.Besides,it suggested that macrobenthic communites in Anhai Bay might have new changes in 2013 compared with 2008 and 2010.