Environmental variables measured at multiple spatial scales exert uneven influence on fish assemblages of floodplain lakes

Hydrobiologia
By:  and 

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Abstract

We examined the interaction between environmental variables measured at three different scales (i.e., landscape, lake, and in-lake) and fish assemblage descriptors across a range of over 50 floodplain lakes in the Mississippi Alluvial Valley of Mississippi and Arkansas. Our goal was to identify important local- and landscape-level determinants of fish assemblage structure. Relationships between fish assemblage structure and variables measured at broader scales (i.e., landscape-level and lake-level) were hypothesized to be stronger than relationships with variables measured at finer scales (i.e., in-lake variables). Results suggest that fish assemblage structure in floodplain lakes was influenced by variables operating on three different scales. However, and contrary to expectations, canonical correlations between in-lake environmental characteristics and fish assemblage structure were generally stronger than correlations between landscape-level and lake-level variables and fish assemblage structure, suggesting a hierarchy of influence. From a resource management perspective, our study suggests that landscape-level and lake-level variables may be manipulated for conservation or restoration purposes, and in-lake variables and fish assemblage structure may be used to monitor the success of such efforts.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Environmental variables measured at multiple spatial scales exert uneven influence on fish assemblages of floodplain lakes
Series title Hydrobiologia
DOI 10.1007/s10750-013-1655-x
Volume 721
Issue 1
Year Published 2014
Language English
Publisher Springer
Contributing office(s) Coop Res Unit Atlanta
Description 16 p.
First page 129
Last page 144
Country United States
State Arkansas, Mississippi
Other Geospatial Mississippi Alluvial Valley
Online Only (Y/N) N
Additional Online Files (Y/N) N