The historical biogeography of groupers: clade diversification patterns and processes

Ma, Ka Yan, Craig, Matthew Thomas, Choat, John Howard, and van Herwerden, Lynne (2016) The historical biogeography of groupers: clade diversification patterns and processes. Molecular Phylogenetics and Evolution, 100. pp. 21-30.

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Abstract

Groupers (family Epinephelidae) are a Glade of species-rich, biologically diverse reef fishes. Given their ecological variability and widespread distribution across ocean basins, it is important to scrutinize their evolutionary history that underlies present day distributions. This study investigated the patterns and processes by which grouper biodiversity has been generated and what factors have influenced their present day distributions. We reconstructed a robust, time-calibrated molecular phylogeny of Epinephelidae with comprehensive (similar to 87%) species sampling, whereby diversification rates were estimated and ancestral ranges were reconstructed. Our results indicate that groupers originated in what is now the East Atlantic during the mid-Eocene and diverged successively to form six strongly supported main clades. These clades differ in age (late Oligocene to mid-Miocene), geographic origin (West Atlantic to West Indo-Pacific) and temporal-spatial diversification pattern, ranging from constant rates of diversification to episodes of rapid radiation. Overall, divergence within certain biogeographic regions was most prevalent in groupers, while vicariant divergences were more common in Tropical Atlantic and East Pacific groupers. Our findings reveal that both biological and geographical factors have driven grouper diversification. They also underscore the importance of scrutinizing group-specific patterns to better understand reef fish evolution. (C) 2016 Elsevier Inc. All rights reserved.

Item ID: 45449
Item Type: Article (Refereed Research - C1)
Keywords: ancestral range reconstruction, climate change cycles, geological history, historical biogeography, molecular dating, reef fishes
ISSN: 1095-9513
Funders: James Cook University (JCU)
Date Deposited: 29 Jun 2016 07:35
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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