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Topography-driven isolation, speciation and a global increase of endemism with elevation

Title data

Steinbauer, Manuel ; Field, Richard ; Grytnes, John-Arvid ; Trigas, Panayiotis ; Ah-Peng, Claudine ; Attorre, Fabio ; Birks, H. John B. ; Borges, Paulo A. V. ; Cardoso, Pedro ; Chou, Chang-Hung ; de Sanctis, Michele ; Sequera, Miguel M. ; Duarte, Maria C. ; Elias, Rui B. ; Fernandez-Palacios, José-María ; Gabriel, Rosalina ; Gereau, Roy E. ; Gillespie, Rosemary G. ; Greimler, Josef ; Harter, David ; Huang, Tsung-Juhn ; Irl, Severin D. H. ; Jeanmonod, Daniel ; Jentsch, Anke ; Jump, Alistair ; Kueffer, Christoph ; Nogué, Sandra ; Otto, Rüdiger ; Price, Jonathan ; Romeiras, Maria M. ; Strasberg, Dominique ; Stuessy, Tod ; Svenning, Jens-Christian ; Vetaas, Ole R. ; Beierkuhnlein, Carl:
Topography-driven isolation, speciation and a global increase of endemism with elevation.
In: Global Ecology and Biogeography. (2016) . - online publ.: 21 June 2016.
ISSN 1466-822X
DOI: https://doi.org/10.1111/geb.12469

Official URL: Volltext

Abstract in another language

Aim: Higher-elevation areas on islands and continental mountains tend to be separated by longer distances, predicting higher endemism at higher elevations; our study is the first to test the generality of the predicted pattern. We also compare it empirically with contrasting expectations from hypotheses invoking higher speciation with area, temperature and species richness.Location: 32 insular and 18 continental elevational gradients from around the world.Methods: We compiled entire floras with elevation-specific occurrence information, and calculated the proportion of native species that are endemic (‘percent endemism’) in 100 m bands, for each of the 50 elevational gradients. Using generalized linear models, we tested the relationships between percent endemism and elevation, isolation, temperature, area and species richness.Results: Percent endemism consistently increased monotonically with elevation, globally. This was independent of richness–elevation relationships, which had varying shapes but decreased with elevation at high elevations. The endemism-elevation relationships were consistent with isolation-related predictions, but inconsistent with hypotheses related to area, richness and temperature.Main conclusions: Higher per-species speciation rates caused by increasing isolation with elevation are the most plausible and parsimonious explanation for the globally consistent pattern of higher endemism at higher elevations that we identify. We suggest that topography-driven isolation increases speciation rates in mountainous areas, across all elevations, and increasingly towards the equator. If so, it represents a mechanism that may contribute to generating latitudinal diversity gradients in a way that is consistent with both present-day and palaeontological evidence.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER136017
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography > Chair Biogeography - Univ.-Prof. Dr. Carl Beierkuhnlein
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Disturbance Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Disturbance Ecology > Professorship Disturbance Ecology - Univ.-Prof. Dr. Anke Jentsch
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 16 Aug 2016 06:02
Last Modified: 16 Aug 2016 06:02
URI: https://eref.uni-bayreuth.de/id/eprint/33940