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Coastal Wetlands Drive Isotopic Niche Plasticity of Top Predator Fish Communities in Green Bay, Lake Michigan.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Coastal Wetlands Drive Isotopic Niche Plasticity of Top Predator Fish Communities in Green Bay, Lake Michigan./
Author:	Rojas Carbajal, Tania Victoria.
Description:	1 online resource (64 pages)
Notes:	Source: Masters Abstracts International, Volume: 84-12.
Contained By:	Masters Abstracts International84-12.
Subject:	Aquatic sciences. -
Online resource:	click for full text (PQDT)
ISBN:	9798379722036

Coastal Wetlands Drive Isotopic Niche Plasticity of Top Predator Fish Communities in Green Bay, Lake Michigan.
Rojas Carbajal, Tania Victoria.

Coastal Wetlands Drive Isotopic Niche Plasticity of Top Predator Fish Communities in Green Bay, Lake Michigan. - 1 online resource (64 pages)

Source: Masters Abstracts International, Volume: 84-12.

Thesis (M.S.)--University of Wisconsin - Green Bay, 2023.

Includes bibliographical references

Green Bay, the largest freshwater estuary in Lake Michigan, is a unique environment consisting of a trophic gradient along the latitudinal axis within the system. This gradient shapes heterogeneous and dynamic habitats and therefore drives a very diverse fish community with different ecology along the coastal wetlands of Green Bay. While previous studies of aquatic food webs in Green Bay have focused on lower trophic levels (e.g., plankton and macroinvertebrates) to estimate trophic shifts due to the occurrence of invasive species, we examined trophic relationships among fish communities in five coastal wetland areas of Green Bay with emphasis on top predator species that are key to fisheries in Lake Michigan. We used stable isotope-based community metrics and Bayesian mixing models to describe food webs (i.e., trophic diversity and redundancy) and observe stable isotope patterns in the trophic position, isotopic niche, and diet contributions. Our overall results suggest that predatory fish communities in Green Bay coastal wetlands displayed different trophic features and energy sources. We found differences in the trophic positions that top predators occupied and the foraging strategies they develop at each site, reporting the plasticity of their isotopic niches. Variations in dietary overlap and niche mechanisms, along with the hydrogeomorphic setting and environmental condition of coastal wetlands, underpin the ability of fish communities in Green Bay to thrive under different stressors.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798379722036Subjects--Topical Terms:

1178821
Aquatic sciences.
Subjects--Index Terms:

Community metricsIndex Terms--Genre/Form:

554714
Electronic books.

Coastal Wetlands Drive Isotopic Niche Plasticity of Top Predator Fish Communities in Green Bay, Lake Michigan.
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520 $a Green Bay, the largest freshwater estuary in Lake Michigan, is a unique environment consisting of a trophic gradient along the latitudinal axis within the system. This gradient shapes heterogeneous and dynamic habitats and therefore drives a very diverse fish community with different ecology along the coastal wetlands of Green Bay. While previous studies of aquatic food webs in Green Bay have focused on lower trophic levels (e.g., plankton and macroinvertebrates) to estimate trophic shifts due to the occurrence of invasive species, we examined trophic relationships among fish communities in five coastal wetland areas of Green Bay with emphasis on top predator species that are key to fisheries in Lake Michigan. We used stable isotope-based community metrics and Bayesian mixing models to describe food webs (i.e., trophic diversity and redundancy) and observe stable isotope patterns in the trophic position, isotopic niche, and diet contributions. Our overall results suggest that predatory fish communities in Green Bay coastal wetlands displayed different trophic features and energy sources. We found differences in the trophic positions that top predators occupied and the foraging strategies they develop at each site, reporting the plasticity of their isotopic niches. Variations in dietary overlap and niche mechanisms, along with the hydrogeomorphic setting and environmental condition of coastal wetlands, underpin the ability of fish communities in Green Bay to thrive under different stressors.
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