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1、東海浮游翼足類（pteropods）種類組成和多樣性研究生物多樣性2005,13(2):168—173BiodiversityScience?研究簡報●東海浮游翼足類(pteropods)種類組成和多樣性研究徐兆禮(農業(yè)部海洋與河口漁業(yè)重點開放實驗室,中國水產科學研究院東海水產研究所,上海200090)摘要:根據1997—2000年東海23.30一33.00N,118.30一128.00E海域四季調查資料,運用定量,定性方法探討了東海浮游翼足類種類組成,種類數(shù),物種多樣性指數(shù)(H)及其與環(huán)境因子的關系
2、.結果表明:四季中共出現(xiàn)翼足類21種,其中尖筆帽螺(Creseisacicula),馬蹄搋螺(Limacinatrochiformis),強卷螺(Agadinasyimpsoni),蝴蝶螺(Desmopterta~papilio),錐筆帽螺(C.virgulavar.comica),棒筆帽螺(C.~la1)a),玻杯螺(Hyalocylizstriata),長吻龜螺(Cavolinialongirostris),芽筆帽螺(Creseisvirgula)和擬海若螺(Paraclionelongicaud
3、ata)等l0種為常見種,胖搋螺(Limacinainflata)和皮鰓螺(Pneumodermaatlanticum)等兩種為次常見種,其余9種是稀有種.在春季轉至夏季,冬季轉至春季時,種類組成出現(xiàn)明顯的季節(jié)更替現(xiàn)象;冬春季種類分布僅受溫度變化的影響,而夏秋季則受溫度和10nl層或底層鹽度變化的共同影響.在冬春季,東海近海由于暖流勢力較弱,水溫較低,翼足類種數(shù)較少,種類數(shù)和多樣性指數(shù)南部大于北部,外海大于近海;從夏季到秋季隨著臺灣暖流勢力的加強,海流將較多的種類帶到東海北部和近海,盡管近海種數(shù)和多樣
4、性指數(shù)值仍呈南高北低的特征,但南部和北部,近海和外海的差距明顯縮小.關鍵詞:浮游動物,常見種,季節(jié)交替,東海SpeciescompositionanddiversityofpteropodsintheEastChinaSeaZhaoliXuKeyandOpenLaboratoryofMarineandEstuaryFisheries,MinistryofAgricultureofChina,EastChinaSeaFisheriesResearchInstitute,ChineseAcademyofF
5、isheriesSciences,Shanghai200090,ChinaAbstract:BasedonthedatafromfouroceanographiccensusesintheEastChinaSea(23.30一33.00N,ll8.30一128.00E)during1997—2000,andbymeansofqualitativeandquantitativeparameters.weanalyzedthespeciescomposition,speciesnumber,andspec
6、iesdiversityofpteropodsandtheirrela—tionshipswithenvironmentalfactors.Atotal0f21pteropodsspecieswereobservedintheEastChinaSea,ofwhichCreseisacicula,Linuwinatrochiformis,Agadinasyimpsoni,Desmopteruspapilio,C.virgulavar.comica,Cavolinialongirostris,Cresei
7、svirgula,C.clara,HyalocylizstriataandParaclionelongicau.datawerecommonspecies;LirmwinainflataandPneumodermaatlatrticumweresubordinatespecies:andtheremaining9specieswererare.Accordingtoseasonalalterationrates(R).obviousalternationsofpteropodsspeciesoccur
8、redfromspringtosummerandfromautumntowinter.Thespeciesnumberofpteropodspeakedinautumn(20species),followedbysummer(15species)andwinter(14species),andwaslowestinspring(5species).Resultsofregressionanalysisshowedthatthedistributionof
