Decline of a native mussel masked by sibling species invasion

Article Abstract:

A portion of the 16S ribosomal RNA gene from mussels collected in southern and central California in the 19th century has been sequenced to compare the sequences with 22 others from modern (Mytilus galloprovincialis), M. edulis and M. trossulus. The European blue mussel has invaded southern California, but a native species, M. trossulus, is abundant in northern California and further north. Phylogenetic analysis using parsimony found that the 19th-centruy mussels were M. trossulus. This species were present when the initial invasion took place but declined. Because the two species were morphologically similar, no one noticed.

California, Usage, Cladistic analysis, Mussels, Biological diversity conservation, Biodiversity conservation

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A transportation model assessment of the risk to native mussel communities from zebra mussel spread

Article Abstract:

North American freshwater mussels are at risk of being fouled by the introduced zebra mussel. Analysis of zebra mussel spread in Illinois suggests it will probably begin at areas of high boat use, including the Fox Chain of Lakes, and proceed to central reservoirs that will act as stepping stones to upstream lakes. Quarantine will displace boat traffic to critical habitats; the most effective means to manage the possible invasion is through education and inspection efforts.

Analysis, Risk assessment, Illinois, Zebra mussels, Zebra mussel

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Impoundments and the decline of freshwater mussels: a case study of an extinction gradient

Article Abstract:

This article examines the negative effects of river impoundment on populations of freshwater mussels in Oklahoma state. Topics discussed include observed mussel extinction gradients, and conservation management plans to overcome the effects of damming rivers.

United States, Statistical Data Included, Management, Endangered species, Stream conservation, Dams

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