Speciation pattern of the horned ghost crab Ocypode ceratophthalmus (Pallas, 1772): An evaluation of the drivers of Indo‐Pacific marine biodiversity using a widely distributed species

Ka Yan MA, Lai Him CHOW, Kingsley J. H. WONG, Hsi‐Nien CHEN, Brian Ho Yeung IP, Christoph D. SCHUBART, Ling Ming TSANG, Benny K. K. CHAN, Ka Hou CHU

Research output: Contribution to journalArticles

1 Citation (Scopus)

Abstract

Aim: The high species richness of the Indo‐Australian Archipelago (IAA) marine biodiversity hotspot has been attributed to three competing hypotheses: Centre of Origin/Centre of Overlap/Centre of Accumulation. While most phylogeographic studies testing these hypotheses have focused on marine fishes, we provide a new perspective on this evolutionary important question by examining the population genetics of the horned ghost crab Ocypode ceratophthalmus sensu lato (Ocypodidae) whose distribution spans the entire Indo‐Pacific and contains at least two colour morphs.
Location: Indo‐Pacific region, spanning from East Africa, India, East Asia to Central Pacific.
Methods: Population genetics analyses based on mitochondrial COI and nuclear NaK intron sequences of O. ceratophthalmus from 39 sites throughout the Indo‐Pacific.
Results: We found at least three genetically distinct geographical clades in O. ceratophthalmus, corresponding to the east, west and central region of the species' range. Divergent clades were found to have originated in the peripheral Central Pacific and West Indian Ocean. Populations at the eastern margin of IAA harbour the highest genetic diversity, due to the co‐existence of east and central clades in these populations.
Main conclusions: Peripheral isolation plays an important role in shaping evolutionary history of this species. Particularly, secondary dispersal of divergent lineages from the Central Pacific contributes to the high diversity found in the IAA. Thus, the Centre of Accumulation hypothesis best describes the evolutionary and demographic history of O. ceratophthalmus. Copyright © 2018 John Wiley & Sons Ltd.
Original languageEnglish
Pages (from-to)2658-2668
JournalJournal of Biogeography
Volume45
Issue number12
Early online dateOct 2018
DOIs
Publication statusPublished - Dec 2018

Citation

Ma, K. Y., Chow, L. H., Wong, K. J. H., Chen, H.-N., Ip, B. H. Y., Schubart, C. D., . . . Chu, K. H. (2018). Speciation pattern of the horned ghost crab Ocypode ceratophthalmus (Pallas, 1772): An evaluation of the drivers of Indo‐Pacific marine biodiversity using a widely distributed species. Journal of Biogeography, 45(12), 2658-2668. doi: 10.1111/jbi.13443

Keywords

  • Centre of Accumulation
  • Centre of Origin
  • Centre of Overlap
  • Coral Triangle
  • Decapoda
  • Indo‐Pacific
  • Phylogeography

Fingerprint Dive into the research topics of 'Speciation pattern of the horned ghost crab Ocypode ceratophthalmus (Pallas, 1772): An evaluation of the drivers of Indo‐Pacific marine biodiversity using a widely distributed species'. Together they form a unique fingerprint.