Reproductive strategy as a piece of the biogeographic puzzle

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TitleReproductive strategy as a piece of the biogeographic puzzle: A case study using Antarctic sea stars (Echinodermata, Asteroidea)AbstractAim: To describe and analyse asteroid biogeographic patterns in the Southern Ocean (SO) and test whether reproductive strategy (brooder versus broadcaster) can explain distribution patterns at the scale of the entire class. We hypothesize that brooding and broadcasting species display different biogeographic patterns. Location: Southern Ocean, south of 45 deg S. Methods: Over 14,000 asteroid occurrences are analysed using bootstrapped spanning network (BSN), non-metrical multidimensional scaling (nMDS) and clustering to uncover the spatial structure of faunal similarities among 25 bioregions. Results: Main biogeographic patterns are congruent with previous works based on other taxa and highlight the isolation of New Zealand, the high richness in the Scotia Arc area particularly of brooding species, an East/West Antarctic differentiation, and the faunal affinities between South America and sub-Antarctic Islands. Asteroids show lower endemism levels than previously reported with 29 percent of species occurring in Antarctica only. In particular, asteroids from Tierra del Fuego showed affinities with those of West Antarctica at the species level, suggesting a recent mixing of assemblages. Biogeographic patterns are highly linked to reproductive strategy. Patterns also differ according to the taxonomic level, revealing the underlying role of historical factors. Main conclusions: Patterns of sea star biogeography are consistent with results obtained for other marine groups and are strongly linked to reproductive strategy. Copyright 2017 John Wiley & Sons Ltd.AcknowledgementsThe authors thank Dr. Gilles Escarguel (Lyon)for his help with the BSN procedure as well as Rachel Downey and Dr. David Barnes for helpful comments on an early manuscript. Marc Eleaume, Christopher Mah, Vladimir Laptikhovsky and Anna Ja_zd_zewska for their data and identification contributions. Prof. Richard Ladle for the help he offered in the last steps of the submission process. The work was supported by a “Fonds pour la formation a la Recherche dans l’Industrie et l’Agriculture” (FRIA) grants to C. Moreau. This is contribution no. 13 to the vERSO project (www.versoproject.be), funded by the Belgian Science Policy Office (BELSPO, contract n BR/132/A1/vERSO) and a contribution to team BioME of the Biogeosciences laboratory.

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1st AuthorMoreau, C.AuthorMoreau, C.Saucède, T.Jossart, Q.Agüera, A.Brayard, A.Danis, B.Year2017JournalJournal of BiogeographyDOI10.1111/jbi.12965URLhttps://www.scopus.com/inward/recor.....c0fcd26040e573b093ae86878Author KeywordsAntarcticaBenthosBiogeographic barrierEchinodermataInvertebrateRegionalizationReproductive modeSea starsSouthern Ocean

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TypeArticleCitationMoreau, C., Saucède, T., Jossart, Q., Agüera, A., Brayard, A. and Danis, B. (2017). Reproductive strategy as a piece of the biogeographic puzzle: A case study using Antarctic sea stars (Echinodermata, Asteroidea). Journal of Biogeography, 44(4): 848-860