Are global hotspots of endemic richness shaped by plate tectonics?
Type | Article | ||||||||||||||||
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Date | 2018-01 | ||||||||||||||||
Language | English | ||||||||||||||||
Author(s) | Pellissier Loic1, 2, Heine Christian3, 7, Rosauer Dan F.4, 5, Albouy Camille1, 2, 6 | ||||||||||||||||
Affiliation(s) | 1 : ETH, Landscape Ecol, Inst Terr Ecosyst, Univ Str 16, CH-8092 Zurich, Switzerland. 2 : Swiss Fed Res Inst WSL, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland. 3 : Univ Sydney, EarthByte Grp, Sydney, NSW 2006, Australia. 4 : Australian Natl Univ, Res Sch Biol, Acton, ACT 2601, Australia. 5 : Australian Natl Univ, Ctr Biodivers Anal, Acton, ACT 2601, Australia. 6 : IFREMER, Unite Ecol & Modeles Halieut, Rue Ile Yeu,BP 21105, F-44311 Nantes 3, France. 7 : Shell Int Explorat & Prod BV, Upstream Int New Ventures, The Hague, Netherlands. |
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Source | Biological Journal Of The Linnean Society (0024-4066) (Oxford Univ Press), 2018-01 , Vol. 123 , N. 1 , P. 247-261 | ||||||||||||||||
DOI | 10.1093/biolinnean/blx125 | ||||||||||||||||
WOS© Times Cited | 33 | ||||||||||||||||
Keyword(s) | allopatric speciation, biodiversity, continental drift, dispersal, species richness | ||||||||||||||||
Abstract | The geology of the earth has shown profound changes in the position, connectivity and topography of continents during the last 100 Myr, which could have shaped the diversification of lineages and thus the current distribution of biodiversity. Here, we evaluate the association between plate tectonics and the current location of hotspots of endemic richness across the globe. We used palaeogeographies in a model that quantifies, through time and for each geographic cell, the potential dispersal between disconnected habitat areas. We expected that rare dispersal events across barriers of unsuitable habitat allow species colonization, but a subsequent absence of gene flow could lead to in situ speciation. We evaluated whether this process could pinpoint the locations of hotspots of endemic richness computed from the ranges of 181 603 species across 14 taxonomic groups. The significant spatial congruence between the model and the endemic richness of several clades provides evidence of the contribution of plate tectonics in shaping global biodiversity gradients. The signal of plate tectonics was independent from those of the Quaternary glaciation, topographical heterogeneity and contemporary productivity and was stronger for terrestrial than freshwater and marine taxa. Regions with high tectonic complexity, predominantly located at the confluence of major lithospheric plates such as the Mediterranean basin, Mesoamerica, Madagascar and South East Asia, probably provided favourable circumstances for allopatric speciation and the emergence of new species across straits. Further efforts should be made to disentangle the effect of past diversification relative to current ecological interactions in shaping global patterns in species diversity. |
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