Sorting of persistent morphological polymorphisms links paleobiological pattern to population process
Sorting of persistent morphological polymorphisms links paleobiological pattern to population process
复制标题
持久形态多态性的排序将古生物学模式与种群过程联系起来
DOI:
10.1017/pab.2023.27
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发表时间:
2023
期刊:
影响因子:
2.7
通讯作者:
Parins-Fukuchi, C. Tomomi
中科院分区:
文献类型:
--
作者:
Parins-Fukuchi, C. Tomomi
Biological variation fuels evolutionary change. Across longer timescales, however, polymorphisms at both the genomic and phenotypic levels often persist longer than would be expected under standard population genetic models such as positive selection or genetic drift. Explaining the maintenance of this variation within populations across long time spans via balancing selection has been a major triumph of theoretical population genetics and ecology. Although persistent polymorphisms can often be traced in fossil lineages over long periods through the rock record, paleobiology has had little to say about either the long-term maintenance of phenotypic variation or its macroevolutionary consequences. I explore the dynamics that occur when persistent polymorphisms maintained over long lineage durations are filtered into descendant lineages during periods of demographic upheaval that occur at speciation. I evaluate these patterns in two lineages: Ectocion, a genus of Eocene mammals, and botryocrinids, a Mississippian cladid crinoid family. Following origination, descendants are less variable than their ancestors. The patterns by which ancestral variation is sorted cannot be distinguished from drift. Maintained and accumulated polymorphisms in highly variable ancestral lineages such as Barycrinus rhombiferus Owen and Shumard, 1852 may fuel radiations as character states are sorted into multiple descendant lineages. Interrogating the conditions under which trans-specific polymorphism is either maintained or lost during periods of demographic and ecological upheaval can explain how population-level processes contribute to the emergent macroevolutionary dynamics that shape the history of life as preserved in the fossil record.
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DOI:
10.1101/2020.11.04.368902
发表时间:
2020-11
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
作者:
C. Parins-Fukuchi;Gregory W. Stull;Stephen A. Smith
通讯作者:
C. Parins-Fukuchi;Gregory W. Stull;Stephen A. Smith
影响因子:
3.2
作者:
C. C. Gilbert
通讯作者:
C. C. Gilbert
影响因子:
2.7
作者:
J. Archibald
通讯作者:
J. Archibald
DOI:
--
发表时间:
2020
期刊:
bioRxiv
影响因子:
--
作者:
C. Parins
通讯作者:
C. Parins
DOI:
--
发表时间:
1980
期刊:
影响因子:
--
作者:
W. Ausich
通讯作者:
W. Ausich