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Molecular phylogenies and historical biogeography of a circumtropical group of gastropods (Genus: Nerita): implications for regional diversity patterns in the marine tropics.
Mol Phylogenet Evol. 2008 Sep; 48(3):1067-86.MP

Abstract

To determine how historical processes, namely speciation, extinction, and dispersal, have contributed to regional species diversity patterns across the marine tropics, we examined the biogeographical history of a circumtropical genus of intertidal gastropods. A species-level phylogeny of Nerita, representing approximately 87% of extant species, was developed from 1608bp of mitochondrial (COI and 16S) and nuclear (ATPSalpha) markers. Phylogenetic relationships generally corresponded to prior classifications; however, comprehensive sampling revealed a number of previously undetected ESUs. Using the resulting tree as a framework, we combined geographical distributions and fossil evidence to reconstruct ancestral ranges, produce a time-calibrated chronogram, and estimate diversification rates. Analyses revealed two monophyletic eastern Pacific+Atlantic (EPA) clades, each of which likely split from an Indo-West Pacific (IWP) sister clade prior to an early Miocene Tethys Seaway closure. More recent diversification throughout the IWP appears to have been driven by both vicariance and dispersal events; EPA diversity has been further shaped by speciation across the Central American Seaway prior to its closure and dispersal across the Atlantic. Despite the latter, inter-regional dispersal has been rare, and likely contributes little to regional diversity patterns. Similarly, infrequent transitions into temperate regions combined with reduced diversification rates may explain low diversity in West and South Pacific clades. Since origination, Nerita diversification appears remarkably constant, with the exception of a lag in the late Eocene-early Oligocene and elevated rates in the late Oligocene-early Miocene. However, a comparison among regions suggested that IWP clades have experienced, on average, higher rates of speciation. Fossil evidence indicates that the EPA likely witnessed greater extinction relative to the IWP. We propose that regional differences in species diversity in Nerita have been largely shaped by differential rates of speciation and extinction.

Authors+Show Affiliations

Center for Population Biology, University of California, One Shields Avenue, Davis, CA 95616, USA. mafrey@ucdavis.eduNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

18586528

Citation

Frey, Melissa A., and Geerat J. Vermeij. "Molecular Phylogenies and Historical Biogeography of a Circumtropical Group of Gastropods (Genus: Nerita): Implications for Regional Diversity Patterns in the Marine Tropics." Molecular Phylogenetics and Evolution, vol. 48, no. 3, 2008, pp. 1067-86.
Frey MA, Vermeij GJ. Molecular phylogenies and historical biogeography of a circumtropical group of gastropods (Genus: Nerita): implications for regional diversity patterns in the marine tropics. Mol Phylogenet Evol. 2008;48(3):1067-86.
Frey, M. A., & Vermeij, G. J. (2008). Molecular phylogenies and historical biogeography of a circumtropical group of gastropods (Genus: Nerita): implications for regional diversity patterns in the marine tropics. Molecular Phylogenetics and Evolution, 48(3), 1067-86. https://doi.org/10.1016/j.ympev.2008.05.009
Frey MA, Vermeij GJ. Molecular Phylogenies and Historical Biogeography of a Circumtropical Group of Gastropods (Genus: Nerita): Implications for Regional Diversity Patterns in the Marine Tropics. Mol Phylogenet Evol. 2008;48(3):1067-86. PubMed PMID: 18586528.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Molecular phylogenies and historical biogeography of a circumtropical group of gastropods (Genus: Nerita): implications for regional diversity patterns in the marine tropics. AU - Frey,Melissa A, AU - Vermeij,Geerat J, Y1 - 2008/05/14/ PY - 2008/01/05/received PY - 2008/04/08/revised PY - 2008/05/08/accepted PY - 2008/7/1/pubmed PY - 2008/11/15/medline PY - 2008/7/1/entrez SP - 1067 EP - 86 JF - Molecular phylogenetics and evolution JO - Mol Phylogenet Evol VL - 48 IS - 3 N2 - To determine how historical processes, namely speciation, extinction, and dispersal, have contributed to regional species diversity patterns across the marine tropics, we examined the biogeographical history of a circumtropical genus of intertidal gastropods. A species-level phylogeny of Nerita, representing approximately 87% of extant species, was developed from 1608bp of mitochondrial (COI and 16S) and nuclear (ATPSalpha) markers. Phylogenetic relationships generally corresponded to prior classifications; however, comprehensive sampling revealed a number of previously undetected ESUs. Using the resulting tree as a framework, we combined geographical distributions and fossil evidence to reconstruct ancestral ranges, produce a time-calibrated chronogram, and estimate diversification rates. Analyses revealed two monophyletic eastern Pacific+Atlantic (EPA) clades, each of which likely split from an Indo-West Pacific (IWP) sister clade prior to an early Miocene Tethys Seaway closure. More recent diversification throughout the IWP appears to have been driven by both vicariance and dispersal events; EPA diversity has been further shaped by speciation across the Central American Seaway prior to its closure and dispersal across the Atlantic. Despite the latter, inter-regional dispersal has been rare, and likely contributes little to regional diversity patterns. Similarly, infrequent transitions into temperate regions combined with reduced diversification rates may explain low diversity in West and South Pacific clades. Since origination, Nerita diversification appears remarkably constant, with the exception of a lag in the late Eocene-early Oligocene and elevated rates in the late Oligocene-early Miocene. However, a comparison among regions suggested that IWP clades have experienced, on average, higher rates of speciation. Fossil evidence indicates that the EPA likely witnessed greater extinction relative to the IWP. We propose that regional differences in species diversity in Nerita have been largely shaped by differential rates of speciation and extinction. SN - 1095-9513 UR - https://www.unboundmedicine.com/medline/citation/18586528/Molecular_phylogenies_and_historical_biogeography_of_a_circumtropical_group_of_gastropods__Genus:_Nerita_:_implications_for_regional_diversity_patterns_in_the_marine_tropics_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1055-7903(08)00226-1 DB - PRIME DP - Unbound Medicine ER -