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Patterns in species richness and assemblage structure of native mussels in the Upper Mississippi River

Aquatic Conservation: Marine and Freshwater Ecosystems

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Abstract

1. To evaluate patterns in mussel assemblages in the Upper Mississippi River (UMR), data from systematic surveys of mussels conducted in three large reaches (Navigation Pools 5, 6, and 18) from 2005–2007 were analysed. 2. Nonmetric multi-dimensional scaling analyses and permutation tests indicated that assemblages differed among reaches. The mussel assemblage in Pool 18 was substantially different from the assemblage in Pool 5 and moderately different from the assemblage in Pool 6, whereas assemblages in Pools 5 and 6 were similar. Assemblages in broadly defined, flowing aquatic habitats did not substantially differ. 3. The dissimilarity of Pool 18 was primarily the result of Pool 18 having higher abundances of three Quadrula species (Q. quadrula, Q. pustulosa, and Q. nodulata), and lower abundances of Amblema plicata and Fusconaia flava. 4. Rarefaction analyses showed that species richness and species density were higher in Pool 18 compared with the other two pools. 5. Large-scale patterns in mussel assemblages may be related to other longitudinal trends in the system including geomorphology, water quality, and abundances of fish species that serve as hosts for glochidial larvae. 6. The results suggest that management goals and actions in the UMR may need to account for important differences in mussel assemblages that occur among reaches.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Patterns in species richness and assemblage structure of native mussels in the Upper Mississippi River
Series title:
Aquatic Conservation: Marine and Freshwater Ecosystems
Volume
22
Issue:
5
Year Published:
2012
Language:
English
Publisher:
Wiley
Publisher location:
Hoboken, NJ
Contributing office(s):
Upper Midwest Environmental Sciences Center
Description:
11 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Aquatic Conservation: Marine and Freshwater Ecosystems
First page:
577
Last page:
587
Country:
United States
State:
Illinois;Iowa;Minnesota;Wisconsin