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Title Transcription
サロマコ ノ タモウルイ グンシュウ ノ コウゾウ トクセイ ト ギョジョウ カンキョウ カコ 20ネンカン ノ ヘンカ ケイコウ
Title Alternative (English)
Polychaete Community Structure and its Temporal Change Through Last 20 Years in the Intensive Scallop Culture Area, Saroma Lagoon, Northern Japan
File
language
jpn
Author
Sonoda, Takeshi
Nakao, Shigeru
Takayasu, Katsumi
Description
The accumulative impact of the intensive scallop culture on the bottom environment and polychaete community structure were studied in Saroma Lagoon, northern Japan. The bottom sampling was carried out in 1995, and the multivariate analysis have been used to compare 1975, 1987 data with 1995 data. 55 species were identified in 1995 samples, among them the dominant species were Maldane cristata, Lumbrineris longifolia and Scalibregma inflatum, which were typical species in Japanese eutrophic coastal bays. The result of comparative analysis of the polychaete community structure during period of the past 20 years showed marked changes in species number, density and species composition. The species composition of polychaete community in 1995 indicates that the lagoon environment may not be in the state of heavily organic pollution. But clear temporal changes in the community structure and frequent occurrence of spreading hypoxic water and red tides in recent time suggest the accumulative organic loading by the intensive scallop culture in the lagoon may cause severe bottom hypoxia, eutrophication of water and stressful disturbances to the benthic community.
Subject
community structure
disturbance
organic loading
polychaete
scallop culture
Journal Title
Laguna : 汽水域研究
Volume
9
Start Page
19
End Page
30
ISSN
21852995
Published Date
2002-03
NCID
AN10439529
Publisher
島根大学汽水域研究センター
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Estuary Research Center
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