Steinbauer, M; Field, R; Grytnes, JA; Trigas, P; Ah-Peng, C; Attorre, F; Birks, HJB; Borges, PAV; Cardoso, P; Chou, C-H; De Sanctis, M; Sequera, MM; Duarte, MC; Elias, RB; Fernandez-Palacios, JM; Gabriel, R; Gereau, RE; Gillespie, RG; Greimler, J; Harter, D; Huang, T-J; Irl, S; Jeanmonod, D; Jentsch, A; Jump, AS; Kueffer, C; Nogué, S; Otto, R; Price, J; Romeiras, MM; Strasberg, D; Stuessy, T; Svenning, JC; Vetaas, OR; Beierkuhnlein, C: Topography-driven isolation, speciation and a global increase of endemism with elevation, Global Ecology and Biogeography, 25(9), 1097–1107 (2016), doi:10.1111/geb.12469
Abstract:

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.

Upcoming ...


BayCEER Colloquium:
Th. 2020-01-16
Ecosystem functional types and biome concepts
Ecological-Botanical Garden:
Su. 2020-01-05
Auf ins Neue! Winterspaziergang im ÖBG
Su. 2020-01-05
Konzert: Musikalischer Jahresbeginn mit den Rockin`Dinos
Su. 2020-01-19
Kastilien, Navarra und das Baskenland: Orchideen im Land Don Quijotes
Geographisches Kolloquium:
Tu. 2019-12-17
The meat of the Anthropocene: Food, capital and the globalisation of industrialised animal killing
BayCEER Blog
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
07.05.2019
EGU – interesting research and free coffee
16.04.2019
Picky carnivorous plants?
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 943.6 hPa
Lufttemperatur: 3.0 °C
Niederschlag: 7.6 mm/24h
Sonnenschein: 6 h/d
Wind (Höhe 17m): 11.3 km/h
Wind (Max.): 23.0 km/h
Windrichtung: SW

...more
This site makes use of cookies More information