Reproductive strategy as a piece of the biogeographic puzzle: a case study using Antarctic sea stars (Echinodermata, Asteroidea). - Université de Bourgogne Accéder directement au contenu
Article Dans Une Revue Journal of Biogeography Année : 2017

Reproductive strategy as a piece of the biogeographic puzzle: a case study using Antarctic sea stars (Echinodermata, Asteroidea).

Thomas Saucède
Quentin Jossart
Arnaud Brayard
Bruno Danis

Résumé

Aim 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 °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% 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.
Fichier principal
Vignette du fichier
Moreau et al 2017 postprint.pdf (1.01 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01501245 , version 1 (02-03-2024)

Identifiants

Citer

Camille Moreau, Thomas Saucède, Quentin Jossart, Antonio Agüera, Arnaud Brayard, et al.. Reproductive strategy as a piece of the biogeographic puzzle: a case study using Antarctic sea stars (Echinodermata, Asteroidea).. Journal of Biogeography, 2017, 44 (4), pp.848-860. ⟨10.1111/jbi.12965⟩. ⟨hal-01501245⟩
85 Consultations
2 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More