Nicolas Hubert - Opening Plentary
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Transcript of Nicolas Hubert - Opening Plentary
Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding
provides new support to the centre-of-overlap hypothesis
Nicolas Huberta, Meyer Cb, Bruggemann Hc, Guérin Fc, Komeno RJLd, Espiau Be, Causse Rf, Williams Jb, Planes Se
a IRD, UMR5554 ISE-M, France; b Smithsonian Institution, NMNH, Washington DC, c Université de la Réunion, Département de Biologie, Réunion; d Université de Toliara, IHSM, Madagascar; e CNRS, CRIOBE USR 3278, France; f Muséum National d’Histoire Naturelle, UMR 7208 BOREA, France.
Diversity of Indo-Pacific coral reef fishes
10490 species, 394 familles (Fishbase, 2011)
33% of world’s ichthyofauna
≈ 5000 reef associated
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Spatial diversity of Indo-Pacific coral reefs
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
4200 sp. (1% surface, 40% ichthyofauna)
944 sp. (698 reef associated) 703 sp. (598 reef associated)
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Gradient of diversity and IPR biodiversity centre
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Centre of origin
Biodiversity hypotheses for coral reefs
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Centre of origin
Biodiversity hypotheses for coral reefs
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Centre of origin
Biodiversity hypotheses for coral reefs
(1) Endemism is young in IPR (2) Range midpoint fall in IPR
(3) Shallow population structure (high connectivity & dispersal)
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Centre of overlap
Biodiversity hypotheses for coral reefs
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Centre of overlap
Biodiversity hypotheses for coral reefs
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Centre of overlap
Biodiversity hypotheses for coral reefs
(1) Endemism follows history (2) Range midpoint out of IPR
(3) Deep population structure (barrier to dispersal)
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Hypothesis testing through large-scale Barcoding
Widespread species with Indopacific distribution ranges = Cryptic diversity ?
(2) Range midpoint = what if n spp. ?
(3) Population structure = dispersal ?
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Collaborative framework for large-scale initiatives
SWIO BIOTAS project
Central Pacific Moorea biocode project
Coral reef fishes 2276 ind., 667 sp., 70 fam.
Inner reef Outer slope
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Inter-oceanic genetic divergence
Intraspecific 513 taxa, 2122 ind., 4794 comp.
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Patterns in widespread species
Pattern 1 62/142
Pattern 2 68/142
Pattern 3 6/142
Pattern 4 6/142
80/142 widespread species include 167 lineages (Patterns 2, 3, 4)
142 species = 229 lineages
Shallow Monophyly Paraphyly (geography, taxonomy)
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Cryptic diversity and genetic divergence
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis
Cryptic diversity and species range midpoint
Widespread species with Indopacific distribution ranges = n spp.
(2) Range midpoint = out of the IPR but species range tails?
(3) Population structure = “fragmented” across the Indopacific
?
Thank you
Hubert et al. Cryptic diversity in Indo-Pacific coral reef fishes revealed by DNA barcoding provides new support to the centre-of-overlap hypothesis