Document Type
Journal Article
Publication Date
10-1-2017
Journal
Evolution
Volume
71
Issue
10
Inclusive Pages
2522-2532
DOI
10.1111/evo.13326
Abstract
Caves are perceived as isolated, extreme habitats with a uniquely specialized biota, which long ago led to the idea that caves are "evolutionary dead-ends." This implies that cave-adapted taxa may be doomed for extinction before they can diversify or transition to a more stable state. However, this hypothesis has not been explicitly tested in a phylogenetic framework with multiple independently evolved cave-dwelling groups. Here, we use the freshwater crayfish, a group with dozens of cave-dwelling species in multiple lineages, as a system to test this hypothesis. We consider historical patterns of lineage diversification and habitat transition as well as current patterns of geographic range size. We find that while cave-dwelling lineages have small relative range sizes and rarely transition back to the surface, they exhibit remarkably similar diversification patterns to those of other habitat types and appear to be able to maintain a diversity of lineages through time. This suggests that cave adaptation is not a "dead-end" for freshwater crayfish, which has positive implications for our understanding of biodiversity and conservation in cave habitats.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
APA Citation
Stern, D., Breinholt, J., Pedraza-Lara, C., López-Mejía, M., Owen, C., Bracken-Grissom, H., Fetzner, J., & Crandall, K. (2017). Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead-end.. Evolution, 71 (10). http://dx.doi.org/10.1111/evo.13326
Peer Reviewed
1
Open Access
1
Included in
Computational Biology Commons, Research Methods in Life Sciences Commons, Structural Biology Commons
Comments
Reproduced with permission of Wiley Periodicals, Inc. Evolution