Predicting where a radiation will occur: Acoustic and molecular surveys reveal overlooked diversity in Indian Ocean Island crickets (Mogoplistinae: Ornebius)

Warren Ben H., Baudin Rémy, Franck Antoine, Hugel Sylvain, Strasberg Dominique. 2016. Predicting where a radiation will occur: Acoustic and molecular surveys reveal overlooked diversity in Indian Ocean Island crickets (Mogoplistinae: Ornebius). PloS One, 11 (2):e0148971, 22 p.

Url - jeu de données - Entrepôt autre : http://www.ncbi.nlm.nih.gov/nuccore/KC494774 / Url - jeu de données - Entrepôt autre : http://www.ncbi.nlm.nih.gov/nuccore/KC494868 / Url - jeu de données - Entrepôt autre : http://www.ncbi.nlm.nih.gov/nuccore/KU597648 / Url - jeu de données - Entrepôt autre : http://www.ncbi.nlm.nih.gov/nuccore/KU597710

Quartile : Q1, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Note générale : Jeux de données enregistrés dans la base GenBank du numéro KC494774 au KC49486 et du numéro KU597648 au KU597710.

Résumé : Recent theory suggests that the geographic location of island radiations (local accumulation of species diversity due to cladogenesis) can be predicted based on island area and isolation. Crickets are a suitable group for testing these predictions, as they show both the ability to reach some of the most isolated islands in the world, and to speciate at small spatial scales. Despite substantial song variation between closely related species in many island cricket lineages worldwide, to date this characteristic has not received attention in the western Indian Ocean islands; existing species descriptions are based on morphology alone. Here we use a combination of acoustics and DNA sequencing to survey these islands for Ornebius crickets. We uncover a small but previously unknown radiation in the Mascarenes, constituting a three-fold increase in the Ornebius species diversity of this archipelago (from two to six species). A further new species is detected in the Comoros. Although double archipelago colonisation is the best explanation for species diversity in the Seychelles, in situ cladogenesis is the best explanation for the six species in the Mascarenes and two species of the Comoros. Whether the radiation of Mascarene Ornebius results from intra- or purely inter- island speciation cannot be determined on the basis of the phylogenetic data alone. However, the existence of genetic, song and ecological divergence at the intra-island scale is suggestive of an intra-island speciation scenario in which ecological and mating traits diverge hand-in-hand. Our results suggest that the geographic location of Ornebius radiations is partially but not fully explained by island area and isolation. A notable anomaly is Madagascar, where our surveys are consistent with existing accounts in finding no Ornebius species present. Possible explanations are discussed, invoking ecological differences between species and differences in environmental history between islands.

Mots-clés géographiques Agrovoc : océan Indien

Classification Agris : L20 - Écologie animale
U30 - Méthodes de recherche

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

• Warren Ben H., Université de la Réunion (REU)
• Baudin Rémy, Université de la Réunion (REU)
• Franck Antoine, CIRAD-BIOS-UMR PVBMT (REU)
• Hugel Sylvain, Université de Strasbourg (FRA)
• Strasberg Dominique, Université de la Réunion (REU)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580012/)

Métriques

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