Site-specific factors influence the richness and phenology of snowbed plants in the Pyrenees
Domènech Ferrés, Marta (Institut d'Estudis Andorrans. Centre d'Estudis de la Neu i la Muntanya d'Andorra)
Komac, Benjamin (Institut d'Estudis Andorrans. Centre d'Estudis de la Neu i la Muntanya d'Andorra)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Conesa, Josep Antoni (Universitat de Lleida. Departament d'Hortofructicultura, Botànica i Jardineria)

Data:	2016
Resum:	Although the timing of snowmelt and growth temperatures appear to be the main factors that influence the species richness and phenology of snowbed plants, site-specific characteristics may also play a role in modifying the effects of the timing of snowmelt and temperature. In this study, the effects of site-specific factors (microtopography and snow origin) on species richness and plant phenology were evaluated in 72 plots in two snowbeds in the Andorran Pyrenees. Snowmelt patterns influenced the spatial distribution of species richness and abundance. Site-specific factors had significant effects on the responses of species (shortening or lengthening the duration of the phenophase) and on the extent to which the timing of snowmelt influenced leaf expansion and flowering. Notably, the highest rates of leaf expansion occurred on late snowmelt isoclines, where, nevertheless, the time taken to reach peak flowering was significantly longer than on the early snowmelt isoclines. The results of this study highlight the fact that, in addition to the effects of interannual variability in climate, site-specific factors have a significant effect on the phenology and reproductive success of the commonest plants in the snowbed communities of the Pyrenees.
Ajuts:	Ministerio de Economía y Competitividad CGL2006-04205 Ministerio de Economía y Competitividad CGL2010-17172 Ministerio de Economía y Competitividad CSD2008-0040 Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-458 European Commission 610028
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Phenology ; Pyrenees ; Richness ; Site-specific ; Snowbed
Publicat a:	Plant Biosystems, Vol. 150, Issue 4 (2016) , p. 741-749, ISSN 1126-3504

DOI: 10.1080/11263504.2014.990941

Postprint 28 p, 531.1 KB

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