2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/27/2021 | 2:00 PM - 3:30 PM | USING A SPATIAL STREAM NETWORK MODEL TO EXAMINE HABITAT ASSOCIATIONS OF AN INVASIVE CRAYFISH SPECIES IN A FRESHWATER DIVERSITY HOTSPOT | Virtual Platform
USING A SPATIAL STREAM NETWORK MODEL TO EXAMINE HABITAT ASSOCIATIONS OF AN INVASIVE CRAYFISH SPECIES IN A FRESHWATER DIVERSITY HOTSPOT
Freshwater biodiversity is threatened globally by introductions of invasive species. Invasive crayfish pose a particular threat to native communities as they often change taxonomic composition through habitat modification and displacement of native species. Alabama’s crayfish community is threatened most severely by the invasive crayfish Faxonius virilis, which is now found across 9 sub-watersheds of the Mobile River basin. To examine how environmental variables relate to the probability of F. virilis occurrence, we used a spatial stream network (SSN) model and species locality records dating back from 1929 through 2018 to model occurrence as a function of nearest distance to a dam, stream slope, and predominant land use at local, regional, and catchment levels. This geostatistical approach accounts for spatial autocorrelation along dendritic river networks, allowing us to determine if movement over time of F. virilis can be characterized as Euclidean (i.e. related to land distances), flow-connected along the river network, or flow-unconnected. Examining the relationship between species distributions and potential drivers of distribution for this highly invasive species is critical both to understanding the consequences of invasion and maintaining the unique crayfish diversity found in Alabama.
- Stream
- Landscape
- Biodiversity
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Presenters/Authors
Emma Arneson
(), University of Alabama, emarneson@crimson.ua.edu;
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Jonathan P. Benstead
(), The University of Alabama, jbenstead@ua.edu;
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Nate Jones
(), University of Alabama, cnjones7@ua.edu;
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Christopher A. Taylor
(), Illinois Natural History Survey, cataylor@illinois.edu;
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