Body-size evolution in gastropods across the Plio-Pleistocene extinction in the western Atlantic
Anderson, B.M.; Petsios, E.; Behn, J.; Betz, A.; Allmon, W.D.; Lieberman, B.S.; Hendricks, J.R. (2024). Body-size evolution in gastropods across the Plio-Pleistocene extinction in the western Atlantic. PLoS One 19(12): e0313060. https://dx.doi.org/10.1371/journal.pone.0313060
In: PLoS One. Public Library of Science: San Francisco. ISSN 1932-6203; e-ISSN 1932-6203, more
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| Authors | | Top |
- Anderson, B.M.
- Petsios, E.
- Behn, J.
- Betz, A.
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- Allmon, W.D.
- Lieberman, B.S.
- Hendricks, J.R.
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| Abstract |
The Plio-Pleistocene turnover event in the western Atlantic following the closure of the Cen?tral American Seaway involved high rates of extinction for both gastropod and bivalve mol?luscs. This extinction was associated with declining nutrient conditions and has been presumed to be associated with a decrease in molluscan body size. Previous work which has been concordant with this expectation, however, has either focused on bivalves or not considered the effects of the recovery post extinction. In three phylogenetically diverse clades, we found that body-size evolution in gastropods across the turnover event is likely tied to ecology. One clade increased in size, one decreased, and another exhibited no sub?stantial change. Individual species lineages exhibit a mixture of microevolutionary changes from the Pliocene to today. This study indicates that gastropod body-size evolution may be more complex than in bivalves, with ecology and other functional traits playing a significant role. Macroevolutionary processes, especially whether a clade re-radiated post extinction, were found to be important. Indeed, a low portion of extant diversity consists of survivors from clades that increased in size or have similar size distributions among their species rela?tive to the Pliocene. |
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