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Title Transcription
ナカウミ ニ オケル カコ ヤク 40ネンカン ノ カイケイチュウ コウカクルイ ノ グンシュウ ヘンカ
Title Alternative (English)
Faunal changes in Ostracoda(Crustacea)in Lake Nakaumi,southwest Japan,over the last 40 years
File
language
jpn
Author
Irizuki, Toshiaki Interdisciplinary Faculty of Science and Engineering, Department of Geoscience, Shimane University
Nakamura, Yuzo ITS Co. Ltd.
Takayasu, Katsumi Research Center for Coastal Lagoon Environments, Shimane University
Sakai, Saburo Japan Marine Science and Technology Center
Description
Sixty−five ostracode species were obtained from 37 sufuace sediment samples collected from Lake Nakaumi between August 5 to 8,2002.The most dominant species is Bicornucythere bisanensis.This species is abundant in the central part of the lake,where oxygen-poor bottom waters develop in summer.Dolerocypria mukaishinense and Cytherura miii are sporadically dominant in relatively low-salinity environments such as river mouths and the Honjo-koku area.Other species are rare except at the lake mouth,where high-diversity assemblages composed of 47 shallow brackish to marine ostracode species are recognized.To clarify the relationships between ostracode assemblages and human activities over the last 40 years,particularly reclamation and freshening projects,we compared published ostracode studies of Lake Nakaumi,based on samples collected in 1963/1967 and 1986,with our present results.Six ostracode assemblages are distinguished on the basis of Q-mode cluster analysis.Ostracode assemblages and their distribution areas changed dramatically between 1963/1967 and 1986,related to change in pattern of bottom water circulation.In contrast,they have changed little at from 1986 to 2002,although the areas dominated by B.Bisanensis seem to be slightly enlarged.
Journal Title
島根大学地球資源環境学研究報告
Volume
22
Start Page
149
End Page
160
ISSN
13439774
Published Date
2003-12-27
NCID
AA11455176
DOI(SelfDOI)
Publisher
島根大学総合理工学部地球資源環境学教室
Publisher Aalternative
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
Estuary Research Center
Remark
12-14,16+ / 1993+
飯泉滋教授・山内靖喜教授 退官記念特集号
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