2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/27/2021 | 2:00 PM - 3:30 PM | COMMUNITY RESPONSES TO THE DECLINE OF A MAJOR FRESHWATER INVASIVE SPECIES | Virtual Platform

COMMUNITY RESPONSES TO THE DECLINE OF A MAJOR FRESHWATER INVASIVE SPECIES

A central focus of invasive species research has been human efforts to eradicate invaders or reduce their abundance to mitigate their impacts. In some cases, however, populations of invasive species decline without human intervention. Such is the case of the invasive rusty crayfish (Faxonius rusticus) in northern Wisconsin, where systematic trapping since 1975 has revealed population declines in approximately half of the lakes surveyed. Population declines of invasive species without human intervention remain understudied, but there is even less research on whether communities recover after these declines. We investigated community recovery of habitat (macrophytes) and prey (snails) affected by F. rusticus following declines of this invader using a rare, long-term dataset (sampled in 1987, 2002, 2011, and 2020) from ten lakes in Vilas County, Wisconsin. We compared community responses in lakes where F. rusticus populations reached a peak and subsequently declined (boom-bust lakes) and lakes where our dataset only captured the decline of F. rusticus (bust lakes) to high- and low-crayfish reference lakes. We will discuss the recovery of macrophytes and snails (measured as species richness and abundance) following F. rusticus invasion, along with future directions for this research.

Species interactions
Biological effects
Biodiversity

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Presenters/Authors

Daniel Szydlowski (), University of Illinois, dannyszydlowski1@gmail.com;