Conceptualizing alternate regimes in a large floodplain-river ecosystem

Journal of Environmental Management
By: , and 

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Abstract

Regime shifts –persistent changes in the structure and function of an ecosystem - are well-documented in many ecosystems but remain poorly understood in floodplain-river ecosystems. We apply a resilience perspective to large floodplain-river ecosystems by presenting three examples of plausible sets of alternate regimes that are relevant to natural resource management interests within the Upper Mississippi River and Illinois River. These alternate regimes include: 1) a clear water and abundant vegetation regime vs. a turbid water and sparse vegetation regime in lentic, off-channel areas, 2) a diverse native fish community regime vs. an invasive-dominated fish community regime, and 3) a regime characterized by a diverse and dynamic mosaic of floodplain vegetation types vs. one characterized as a persistent invasive wet meadow monoculture. For each set of potential alternate regimes, we synthesize known or hypothesized feedback mechanisms that reinforce regimes, controlling variables that drive regime transitions, and restoration pathways. The conceptual models presented here provide a framework for synthesizing our understanding of the dynamics of this ecosystem and are relevant to other large floodplain-river ecosystems that face similar human pressures across the world. The models are currently being used to prioritize future research, test hypotheses, and inform restoration and management on the Upper Mississippi River and Illinois River. Through sharing our approach, we provide a case study in which we document an important step in operationalizing resilience concepts for the management of natural resources.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Conceptualizing alternate regimes in a large floodplain-river ecosystem
Series title Journal of Environmental Management
DOI 10.1016/j.jenvman.2020.110516
Volume 264
Year Published 2020
Language English
Publisher Elsevier
Contributing office(s) Upper Midwest Environmental Sciences Center
Description 110516, 15 p.
Country United States
State Minnesota, Wisconsin, Iowa, Illinois, Missouri
Other Geospatial Upper Mississippi River, Illinois River
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