Grassland species composition and morpho-functional traits along an altitudinal gradient in a Mediterranean environment: Relationship with soil water availability and evaporative dynamic

Acosta, B; Sanchez Jardon, L.; Del Pozo A.; Garcia-Ibanez, E; Casado, MA; Montalvo, J; Pineda, FD

Abstract

We studied the relationship between soil water dynamics and plant spatial distribution in Mediterranean grasslands. We considered five sites along an altitudinal gradient of 1100 m in Central Spain, each one comprising plots in the upper and lower zones of a south-facing slope. Soil and vegetation variables were obtained for five subplots placed at random within each plot. The evaporative dynamics of soil and litter samples was studied under laboratory conditions at two extreme temperatures (12 and 30 °C). We used Detrended Correspondence Analysis and regression analysis to determine the relationship between the evaporation parameters of soil and the abundance and traits of the species. We related soil moisture and evaporation to the distribution of the herbaceous vegetation for plant species and morpho-functional traits, revealing a variation trend associated simultaneously with altitude and the geomorphological position. Water content at the end of the linear phase and parameters of total evaporation length showed linear relationships with the vegetation gradient, in both soil and litter. These relationships, however, depended on temperature setting and enabled us to examine hypotheses on the consequences of different climate change scenarios in Mediterranean grasslands. If global temperatures increase, soils at high altitudes will require higher water content in order to maintain their characteristic vegetation. © 2008 Elsevier Masson SAS. All rights reserved.

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Título según WOS: Grassland species composition and morpho-functional traits along an altitudinal gradient in a Mediterranean environment: Relationship with soil water availability and evaporative dynamic
Título según SCOPUS: Grassland species composition and morpho-functional traits along an altitudinal gradient in a Mediterranean environment: Relationship with soil water availability and evaporative dynamic
Título de la Revista: ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
Volumen: 34
Número: 1
Editorial: Elsevier
Fecha de publicación: 2008
Página de inicio: 26
Página final: 37
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S1146609X08000453
DOI:

10.1016/j.actao.2008.03.001

Notas: ISI, SCOPUS