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Unionoid mussels as an indicator of fish communities : A conceptual framework and empirical evidence

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Title: Unionoid mussels as an indicator of fish communities : A conceptual framework and empirical evidence
Authors: Negishi, J. N. Browse this author
Nagayama, S. Browse this author
Kume, M. Browse this author
Sagawa, S. Browse this author
Kayaba, Y. Browse this author
Yamanaka, Y. Browse this author →KAKEN DB
Keywords: Backwaters
Drainage channels
Issue Date: Jan-2013
Publisher: Elsevier
Journal Title: Ecological Indicators
Volume: 24
Start Page: 127
End Page: 137
Publisher DOI: 10.1016/j.ecolind.2012.05.029
Abstract: We tested the hypothesis that globally imperiled freshwater mussels (Order: Unionoida) can be used as an indicator of fish communities in lowland aquatic systems for relatively small geographic areas (i.e., <100 km2). The survey was conducted in 13 reaches within a network of agricultural drainage channels and in 9 floodplain backwaters in Central Japan. In each site, the fish community was examined on four seasonal occasions (spring to early summer, mid-summer, fall to early winter, and winter) and related to the mussel community. Total abundance, taxon richness, and diversity index were used to characterize fish communities. Mussel community variables predicted some aspects of fish communities, but such patterns were seasonally limited. In both systems, mussel community variables had no predictive power for the total abundance of fishes. In drainage channels, taxon richness of mussels was a good predictor of all fish community variables except for total abundance in early summer. In winter, mussel abundance predicted well the taxon richness of the fish community, while taxon richness predicted the diversity index of the fish community. In backwaters, mussel abundance was a good predictor of fish community variables except total abundance in mid-summer. A relatively minor portion (<23%) of fish-mussel relationships was attributable to direct commensalism between mussels and bitterlings. A conceptual framework was provided to help identify the mechanisms behind fish-mussel relationships. Our findings validated the use of mussels as an indicator of high-quality summer rearing habitats in backwaters and wintering and reproduction habitats of fishes in drainage channels.
Type: article (author version)
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 根岸 淳二郎

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