In a new study published in the journal Systematic Biology, a model simulating the distributions of two imaginary species with identical environmental requirements, or ecological niches, was created. The model was tested to determine whether a variety of ecological niche modeling methods would correctly infer that the environmental requirements of the two species were identical.
"But the fact that the two populations live in different environments could be a trivial observation and lead to erroneous conclusions. For example, you might infer that the two populations have different environmental requirements, suggesting that reintroducing one species into the other wouldn't work, when in fact it could," Godsoe said.
The findings have important implications for understanding the relationship between the environmental requirements of a species—its niche—and its geographic distribution.
"There is a growing interest in using data on the geographic distributions of a species. This study clarifies the conditions under which distribution data can mislead us, and in the future, this might help us make better management decisions about a species," Godsoe explained.
The National Institute for Mathematical and Biological Synthesis (NIMBioS) brings together researchers from around the world to collaborate across disciplinary boundaries to investigate solutions to basic and applied problems in the life sciences. NIMBioS is sponsored by the National Science Foundation, the U.S. Department of Homeland Security, and the U.S. Department of Agriculture with additional support from The University of Tennessee, Knoxville.
Publication: Godsoe W. 2010. Regional Variation Exaggerates Ecological Divergence in Niche Models. Systematic Biology 59: 298-306. http://sysbio.oxfordjournals.org/cgi/content/abstract/59/3/298
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