Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders
Aims: In many taxa, the latitudinal span of species' geographic ranges is positively correlated with median latitude (i.e., a Rapoport effect). This is frequently explained as adaptation to contemporary climate, however, variability in postglacial range expansion among species could also explai...
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ftdatacite:10.5281/zenodo.5884584 2023-05-15T16:41:18+02:00 Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders Radomski, Tom Kuchta, Shawn Kozak, Kenneth 2022 https://dx.doi.org/10.5281/zenodo.5884584 https://zenodo.org/record/5884584 unknown Zenodo https://zenodo.org/communities/dryad https://dx.doi.org/10.5061/dryad.nzs7h44ss https://dx.doi.org/10.5281/zenodo.5594524 https://zenodo.org/communities/dryad Open Access MIT License https://opensource.org/licenses/MIT mit info:eu-repo/semantics/openAccess MIT SoftwareSourceCode article Software 2022 ftdatacite https://doi.org/10.5281/zenodo.5884584 https://doi.org/10.5061/dryad.nzs7h44ss https://doi.org/10.5281/zenodo.5594524 2022-03-10T10:43:50Z Aims: In many taxa, the latitudinal span of species' geographic ranges is positively correlated with median latitude (i.e., a Rapoport effect). This is frequently explained as adaptation to contemporary climate, however, variability in postglacial range expansion among species could also explain this pattern. Here, we analyze geographic data for North American salamanders to test the causes of Rapoport effects. Location: Temperate North America Taxon: Salamanders (order Caudata) Methods: Using range maps, we tested for a Rapoport effect. We then manipulated species' latitudinal ranges and species pools to test for an impact of postglacial range expansion in forming a Rapoport effect. In addition, we built ecological niche models for species found south of the Wisconsin Ice Sheet during the Last Glacial Maximum and transferred these models to postglacial areas. If dispersal is important in forming a Rapoport effect, then some species may be able to tolerate northern climates but have not expanded northward as a result of variation in geographic access to postglacial habitats. Results: We found evidence of a Rapoport effect that was robust to the null models we tested. Analyses that manipulated ranges and species pools supported a role for variation in postglacial range expansion among species, especially for eastern North America. Results from transferring ecological niche models indicated that species have suitable habitat north of their range limit. Main conclusions: Our analyses suggest that variation in postglacial range expansion is likely important in shaping geographic range size variation among species in areas where climates have changed rapidly. Postglacial colonization and range expansion likely plays an important role in forming latitudinal biodiversity gradients in many taxa. Historically, ecophysiology and biotic interactions have been emphasized as important contributors to diversity gradients, yet our study indicates that postglacial colonization also plays a key role in forming latitudinal biodiversity gradients. Software Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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description |
Aims: In many taxa, the latitudinal span of species' geographic ranges is positively correlated with median latitude (i.e., a Rapoport effect). This is frequently explained as adaptation to contemporary climate, however, variability in postglacial range expansion among species could also explain this pattern. Here, we analyze geographic data for North American salamanders to test the causes of Rapoport effects. Location: Temperate North America Taxon: Salamanders (order Caudata) Methods: Using range maps, we tested for a Rapoport effect. We then manipulated species' latitudinal ranges and species pools to test for an impact of postglacial range expansion in forming a Rapoport effect. In addition, we built ecological niche models for species found south of the Wisconsin Ice Sheet during the Last Glacial Maximum and transferred these models to postglacial areas. If dispersal is important in forming a Rapoport effect, then some species may be able to tolerate northern climates but have not expanded northward as a result of variation in geographic access to postglacial habitats. Results: We found evidence of a Rapoport effect that was robust to the null models we tested. Analyses that manipulated ranges and species pools supported a role for variation in postglacial range expansion among species, especially for eastern North America. Results from transferring ecological niche models indicated that species have suitable habitat north of their range limit. Main conclusions: Our analyses suggest that variation in postglacial range expansion is likely important in shaping geographic range size variation among species in areas where climates have changed rapidly. Postglacial colonization and range expansion likely plays an important role in forming latitudinal biodiversity gradients in many taxa. Historically, ecophysiology and biotic interactions have been emphasized as important contributors to diversity gradients, yet our study indicates that postglacial colonization also plays a key role in forming latitudinal biodiversity gradients. |
format |
Software |
author |
Radomski, Tom Kuchta, Shawn Kozak, Kenneth |
spellingShingle |
Radomski, Tom Kuchta, Shawn Kozak, Kenneth Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders |
author_facet |
Radomski, Tom Kuchta, Shawn Kozak, Kenneth |
author_sort |
Radomski, Tom |
title |
Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders |
title_short |
Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders |
title_full |
Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders |
title_fullStr |
Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders |
title_full_unstemmed |
Post-Pleistocene Dispersal Explains the Rapoport Effect in North American Salamanders |
title_sort |
post-pleistocene dispersal explains the rapoport effect in north american salamanders |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://dx.doi.org/10.5281/zenodo.5884584 https://zenodo.org/record/5884584 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://zenodo.org/communities/dryad https://dx.doi.org/10.5061/dryad.nzs7h44ss https://dx.doi.org/10.5281/zenodo.5594524 https://zenodo.org/communities/dryad |
op_rights |
Open Access MIT License https://opensource.org/licenses/MIT mit info:eu-repo/semantics/openAccess |
op_rightsnorm |
MIT |
op_doi |
https://doi.org/10.5281/zenodo.5884584 https://doi.org/10.5061/dryad.nzs7h44ss https://doi.org/10.5281/zenodo.5594524 |
_version_ |
1766031728210608128 |