Experimental evaluation of the effects of bigmouth buffalo (Ictiobus 1 cyprinellus) density on shallow lake ecosystems

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dc.contributor.author Wilkinson, Grace M.
dc.contributor.author Butts, Tyler J.
dc.contributor.author Sandry, Elena
dc.contributor.author Simonson, Martin A.
dc.contributor.author Weber, Michael
dc.contributor.department Natural Resource Ecology and Management
dc.date.accessioned 2022-06-01T19:38:08Z
dc.date.available 2022-06-01T19:38:08Z
dc.date.issued 2022
dc.description.abstract Bigmouth buffalo (Ictiobus cyprinellus) is a large-bodied planktivore inhabiting shallow waterways in North America and subjected to unregulated harvest throughout much of their native range. Despite high harvest pressure on some populations, we know little about the ecosystem-level effects of lowering bigmouth buffalo densities. To evaluate the effect of bigmouth buffalo density on lower trophic levels we added fish in ambient and harvested densities to a set of ponds and compared plankton dynamics to reference, fishless ponds. Zooplankton biomass declined in ambient density ponds after the fish addition while chlorophyll-a concentrations increased. In the harvested density treatment chlorophyll-a concentrations were similar to the reference ponds despite a decline in zooplankton biomass, likely due to larger zooplankton community size in the harvested ponds exerting greater grazing pressure. This experimental manipulation revealed density-dependent top-down control on lower trophic levels by bigmouth buffalo and the potential for cascading trophic interactions with the harvest of this species. These results point to the need for ecosystem-level studies of the effects of intensive harvest of bigmouth buffalo on water quality.
dc.description.comments This is a pre-print of the article Wilkinson, Grace Marie, Tyler Butts, Elena Sandry, Martin Simonson, and Michael Weber. "Experimental evaluation of the effects of bigmouth buffalo (Ictiobus cyprinellus) density on shallow lake ecosystems." EarthArXiv (2022). DOI: 10.31223/X5R923. Attribution 4.0 International (CC BY 4.0). Copyright 2022 The Authors. Posted with permission.
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/Nr1VM21z
dc.language.iso en
dc.publisher EarthArXiv
dc.source.uri https://doi.org/10.31223/X5R923 *
dc.subject.keywords trophic cascade
dc.subject.keywords bigmouth buffalo
dc.subject.keywords commercial harvest
dc.subject.keywords food web
dc.title Experimental evaluation of the effects of bigmouth buffalo (Ictiobus 1 cyprinellus) density on shallow lake ecosystems
dc.type Article
dspace.entity.type Publication
relation.isAuthorOfPublication 3baf6c7c-b2cc-49f9-8206-a05cfe5ef774
relation.isOrgUnitOfPublication e87b7b9d-30ea-4978-9fb9-def61b4010ae
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