Connectedness of land use, nutrients, primary production, and fish assemblages in oxbow lakes

Aquatic Sciences
By: , and 

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Abstract

We explored the strength of connectedness among hierarchical system components associated with oxbow lakes in the alluvial valley of the Lower Mississippi River. Specifically, we examined the degree of canonical correlation between land use (agriculture and forests), lake morphometry (depth and size), nutrients (total nitrogen and total phosphorus), primary production (chlorophyll-a), and various fish assemblage descriptors. Watershed (p < 0.01) and riparian (p = 0.02) land use, and lake depth (p = 0.05) but not size (p = 0.28), were associated with nutrient concentrations. In turn, nutrients were associated with primary production (p < 0.01), and primary production was associated with sunfish (Centrarchidae) assemblages (p < 0.01) and fish biodiversity (p = 0.08), but not with those of other taxa and functional guilds. Multiple chemical and biological components of oxbow lake ecosystems are connected to landscape characteristics such as land use and lake depth. Therefore, a top-down hierarchical approach can be useful in developing management and conservation plans for oxbow lakes in a region impacted by widespread landscape changes due to agriculture.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Connectedness of land use, nutrients, primary production, and fish assemblages in oxbow lakes
Series title Aquatic Sciences
DOI 10.1007/s00027-013-0310-y
Volume 76
Issue 1
Year Published 2013
Language English
Publisher Springer
Contributing office(s) Coop Res Unit Atlanta
Description 10 p.
First page 41
Last page 50
Country United States
State Arkansas, Mississippi
Other Geospatial Lower Mississippi River alluvial valley
Online Only (Y/N) N
Additional Online Files (Y/N) N