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Type: Artigo
Title: The Rich Sides Of Mountain Summits: A Pan-european View On Aspect Preferences Of Alpine Plants
Author: Winkler
Manuela; Lamprecht
Andrea; Steinbauer
Klaus; Huelber
Karl; Theurillat
Jean-Paul; Breiner
Frank; Choler
Philippe; Ertl
Siegrun; Giron
Alba Gutierrez; Rossi
Graziano; Vittoz
Pascal; Akhalkatsi
Maia; Bay
Christian; Alonso
Jose-Luis Benito; Bergstrom
Tomas; Carranza
Maria Laura; Corcket
Emmanuel; Dick
Jan; Erschbamer
Brigitta; Calzado
Rosa Fernandez; Fosaa
Anna Maria; Gavilan
Rosario G.; Ghosn
Dany; Gigauri
Khatuna; Huber
Doris; Kanka
Robert; Kazakis
George; Klipp
Martin; Kollar
Jozef; Kudernatsch
Thomas; Larsson
Per; Mallaun
Martin; Michelsen
Ottar; Moiseev
Pavel; Moiseev
Dmitry; Molau
Ulf; Mesa
Joaquin Molero; di Cella
Umberto Morra; Nagy
Laszlo; Petey
Martina; Puscas
Mihai; Rixen
Christian; Stanisci
Angela; Suen
Michael; Syverhuset
Anne O.; Tomaselli
Marcello; Unterluggauer
Peter; Ursu
Tudor; Villar
Luis; Gottfried
Michael; Pauli
Abstract: In the alpine life zone, plant diversity is strongly determined by local topography and microclimate. We assessed the extent to which aspect and its relatedness to temperature affect plant species diversity, and the colonization and disappearance of species on alpine summits on a pan-European scale. Location Mountain summits in Europe's alpine life zone. Methods Vascular plant species and their percentage cover were recorded in permanent plots in each cardinal direction on 123 summits in 32 regions across Europe. For a subset from 17 regions, resurvey data and 6-year soil temperature series were available. Differences in temperature sum and Shannon index as well as species richness, colonization and disappearance of species among cardinal directions were analysed using linear mixed-effects and generalised mixed-effects models, respectively. Results Temperature sums were higher in east-and south-facing aspects than in the north-facing ones, while the west-facing ones were intermediate; differences were smallest in northern Europe. The patterns of temperature sums among aspects were consistent among years. In temperate regions, thermal differences were reflected by plant diversity, whereas this relationship was weaker or absent on Mediterranean and boreal mountains. Colonization of species was positively related to temperature on Mediterranean and temperate mountains, whereas disappearance of species was not related to temperature. Main conclusions Thermal differences caused by solar radiation determine plant species diversity on temperate mountains. Advantages for plants on eastern slopes may result from the combined effects of a longer diurnal period of radiation due to convection cloud effects in the afternoon and the sheltered position against the prevailing westerly winds. In northern Europe, long summer days and low sun angles can even out differences among aspects. On Mediterranean summits, summer drought may limit species numbers on the warmer slopes. Warmer aspects support a higher number of colonization events. Hence, aspect can be a principal determinant of the pace of climate-induced migration processes.
Subject: Alpine Life Zone
Climate Change
Long-term Monitoring
Slope Aspect
Soil Temperature
Species Diversity
Vascular Plants
Editor: Wiley-Blackwell
Citation: Journal Of Biogeography. Wiley-blackwell, v. 43, p. 2261 - 2273, 2016.
Rights: fechado
Identifier DOI: 10.1111/jbi.12835
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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