资源描述：
《长江口湿地三个演替阶段大型底栖动物群落特征》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、动物学研究2006,Aug.27(4):411-418CN53-1040/QISSN0254-5853ZoologicalResearchX长江口湿地三个演替阶段大型底栖动物群落特征3杨泽华,童春富,陆健健(华东师范大学河口海岸学国家重点实验室,上海200062)摘要:2001—2005年对长江口新生沙洲九段沙(上沙、中沙、下沙)盐沼演替序列不同阶段[盐渍藻类阶段(SA)、海三棱草(Scirpusmariqueter)—草(Scirpustriqueter)阶段(MT)、芦苇(Phragmites
2、aus2tralis)—互花米草(Spartinaalterniflora)阶段(AA)]的大型底栖动物群落特征进行了分析研究。大型底栖动物群落的物种数、Shannon2Wiener多样性指数、Pielou均匀度指数、密度及生物量都是MT>AA>SA。SA、AA优势种的生活型分别是底内型、穴居型;MT优势种的生活型是底上附着型和穴居型。不同沙洲相同盐沼演替阶段大型底栖动物群落结构都较为相似,盐渍藻类阶段的相似性最高;不同演替阶段间差别明显,SA和AA间差别最大。不同盐沼演替阶段大型底栖动物群落特征
3、的明显差异,既反映了环境沿盐沼演替序列的梯度变化,也体现了不同盐沼对底栖动物群落作用的差别,同时也显示了大型底栖动物对不同盐沼演替阶段生境的适应。关键词:盐沼;演替阶段;大型底栖动物;群落结构中图分类号:Q17914;Q958115文献标识码:A文章编号:0254-5853(2006)04-0411-08CharacteristicsofMacrobenthicFaunaCommunitiesinThreeSuccessionalStagesoftheNewEmergentSaltMarshina
4、nEstuaryoftheYangtzeRiver3YANGZe2hua,TONGChun2fu,LUJian2jian(StateKeyLaboratoryofEstuarineandCoastalResearch,EastChinaNormalUniversity,Shanghai200062,China)Abstract:Thecharacteristicsofmacrobenthicfaunacommunitiesinthethreesaltmarshsuccessionalstages[
5、salinealgaestage(SA),Scirpusmariqueter-Scirpustriqueterstage(MT)andPhragmitesaustralis-Spartinaalternflorastage(AA)]werestudiedduring2001to2005,innewemergentshoals,Jiuduansha(Shangsha,ZhongshaandXiasha),anes2tuaryoftheYangtzeRiver.Theresultsshowedthat
6、theShannon2Wienerindex,thePielousEvennessindex,thedensityandthebiomassofthecommunitiesineachshoalallhadthesamesequenceforthesesuccessionalstages.ThissequencewasMT>AA>SA.ThedominantlifeformsatSAandAAstageswereinfaunalandcavingrespectively,whilethoseatM
7、Twereadheringandcaving.ThecommunitystructuresatthesamesuccessionalstageinthethreedifferentshoalswereallquitesimilarandthoseattheSAstageshadevenmoresimilarities.However,therewereobviousdifferencesamongthecommunitystructuresatthethreesuccessionalstages,
8、especiallybetweenthoseatSAandAA.Theseresultsimpliedthattherewassomeenvironmentalgradientvariationalongthesuccessionalsequence,andthatthesaltmarshofthedifferentsuccessionalstageshaddifferenteffectsonthemacrobenthicfaunacommunities.Accordingly,t
