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Brown recluse spider: Range could expand in N. America with changing climate

Date:
April 23, 2011
Source:
University of Kansas Biodiversity Institute
Summary:
One of the most feared spiders in North America -- the brown recluse -- is the subject a new study that aims to predict its distribution and how that distribution may be affected by climate changes. Researchers believe that the range may expand northward, potentially invading previously unaffected regions. Newly influenced areas may include parts of Nebraska, Minnesota, Wisconsin, Michigan, South Dakota, Ohio, and Pennsylvania.

Brown recluse spider.
Credit: iStockphoto/William Howe

One of the most feared spiders in North America is the subject a new study that aims to predict its distribution and how that distribution may be affected by climate changes.

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When provoked, the spider, commonly known as the brown recluse (Loxosceles reclusa), injects powerful venom that can kill the tissues at the site of the bite. This can lead to a painful deep sore and occasional scarring.

But the wounds are not always easy to diagnose. Medical practitioners can confuse the bite with other serious conditions, including Lyme disease and various cancers. The distribution of the spider is poorly understood as well, and medical professionals routinely diagnose brown recluse bites outside of the areas where it is known to exist.

By better characterizing its distribution, and by examining potential new areas of distribution with future climate change scenarios, the medical community and the public can be more informed about this species, said study author Erin Saupe. Saupe is a graduate student in Geology and a Biodiversity Institute student.

To address the issue of brown recluse distribution, Saupe and other researchers used a predictive mapping technique called ecological niche modeling. They applied future climate change scenarios to the spider's known distribution in the Midwest and southern United States. The researchers concluded that the range may expand northward, potentially invading previously unaffected regions. Newly influenced areas may include parts of Nebraska, Minnesota, Wisconsin, Michigan, South Dakota, Ohio, and Pennsylvania.

"These results illustrate a potential negative consequence of climate change on humans and will aid medical professionals in proper bite identification and treatment, potentially reducing bite misdiagnoses," Saupe said.

The paper is published in the March 25 edition of the journal PLoS ONE. The research team included Saupe; Monica Papes, a Biodiversity Institute and Ecology and Evolutionary Biology alumna; Paul Selden, Director of the Paleontological Institute and Gulf-Hedberg Distinguished Professor of Invertebrate Paleontology, Department of Geology; and Richard S. Vetter, University of California-Riverside.


Story Source:

The above story is based on materials provided by University of Kansas Biodiversity Institute. Note: Materials may be edited for content and length.


Journal Reference:

  1. Erin E. Saupe, Monica Papes, Paul A. Selden, Richard S. Vetter. Tracking a Medically Important Spider: Climate Change, Ecological Niche Modeling, and the Brown Recluse (Loxosceles reclusa). PLoS ONE, 2011; 6 (3): e17731 DOI: 10.1371/journal.pone.0017731

Cite This Page:

University of Kansas Biodiversity Institute. "Brown recluse spider: Range could expand in N. America with changing climate." ScienceDaily. ScienceDaily, 23 April 2011. <www.sciencedaily.com/releases/2011/04/110421212230.htm>.
University of Kansas Biodiversity Institute. (2011, April 23). Brown recluse spider: Range could expand in N. America with changing climate. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2011/04/110421212230.htm
University of Kansas Biodiversity Institute. "Brown recluse spider: Range could expand in N. America with changing climate." ScienceDaily. www.sciencedaily.com/releases/2011/04/110421212230.htm (accessed October 31, 2014).

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