RT info:eu-repo/semantics/article
T1 Topography-driven isolation, speciation and a global increase of endemism with elevation
A1 Steinbauer, Manuel J.
A1 Field, Richard
A1 Grytnes, John-Arvid
A1 Trigas, Panayiotis
A1 Ah-Peng, Claudine
A1 Attorre, Fabio
A1 Birks, H. John B.
A1 Borges, Paulo A. V.
A1 Cardoso, Pedro
A1 Chou, Chang-Hung
A1 De Sanctis, Michele
A1 Sequeira, Miguel M. de
A1 Duarte, Maria C.
A1 Elias, Rui B.
A1 Fernández-Palacios, José María
A1 Gabriel, Rosalina
A1 Gereau, Roy E.
A1 Gillespie, Rosemary G.
A1 Greimler, Josef
A1 Harter, David E. V.
A1 Huang, Tsurng-Juhn
A1 Irl, Severin D.H.
A1 Jeanmonod, Daniel
A1 Jentsch, Anke
A1 Jump, Alistair S.
A1 Kueffer, Christoph
A1 Nogué, Sandra
A1 Otto, Rüdiger
A1 Price, Jonathan
A1 Romeiras, Maria M.
A1 Strasberg, Dominique
A1 Stuessy, Tod
A1 Svenning, Jens-Christian
A1 Vetaas, Ole R.
A1 Beierkuhnlein, Carl
K1 Altitude
K1 Biogeographical processes
K1 Diversity
K1 Ecological mechanisms
K1 Endemism
K1 Global relationship
K1 Isolation
K1 Latitudinal gradient
K1 Mixedeffects models
K1 Sky islands.
AB Aim Higher-elevation areas on islands and continental mountains tendto be separated by longer distances, predicting higher endemism athigher elevations; our study is the first to test the generality of thepredicted pattern. We also compare it empirically with contrastingexpectations from hypotheses invoking higher speciation with area,temperature and species richness.Location Thirty-two insular and 18 continental elevational gradientsfrom around the world.Methods We compiled entire floras with elevation-specific occurrenceinformation, and calculated the proportion of native species that areendemic (‘percent endemism’) in 100-m bands, for each of the 50elevational gradients. Using generalized linear models, we tested therelationships between percent endemism and elevation, isolation,temperature, area and species richness.Results Percent endemism consistently increased monotonically withelevation, globally. This was independent of richness–elevationrelationships, which had varying shapes but decreased with elevation athigh elevations. The endemism–elevation relationships were consistentwith isolation-related predictions, but inconsistent with hypothesesrelated to area, richness and temperature.Main conclusions Higher per-species speciation rates caused byincreasing isolation with elevation are the most plausible andparsimonious explanation for the globally consistent pattern of higherendemism at higher elevations that we identify. We suggest thattopography-driven isolation increases speciation rates in mountainousareas, across all elevations and increasingly towards the equator. If so, itrepresents a mechanism that may contribute to generating latitudinal diversity gradients in a way that is consistent with both present-day andpalaeontological evidence
PB Wiley
SN 1466-822X
YR 2016
FD 2016
LK http://riull.ull.es/xmlui/handle/915/16816
UL http://riull.ull.es/xmlui/handle/915/16816
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-nov-2024