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Functional diversity enhances the resistance of ecosystem multifunctionality to aridity in M editerranean drylands
Author(s) -
Valencia Enrique,
Maestre Fernando T.,
Le BagoussePinguet Yoann,
Quero José Luis,
Tamme Riin,
Börger Luca,
GarcíaGómez Miguel,
Gross Nicolas
Publication year - 2015
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.13268
Subject(s) - shrub , resistance (ecology) , arid , ecosystem , trait , ecology , climate change , specific leaf area , agroforestry , biology , environmental science , geography , botany , photosynthesis , computer science , programming language
Summary We used a functional trait‐based approach to assess the impacts of aridity and shrub encroachment on the functional structure of Mediterranean dryland communities (functional diversity ( FD ) and community‐weighted mean trait values ( CWM )), and to evaluate how these functional attributes ultimately affect multifunctionality (i.e. the provision of several ecosystem functions simultaneously). Shrub encroachment (the increase in the abundance/cover of shrubs) is a major land cover change that is taking place in grasslands worldwide. Studies conducted on drylands have reported positive or negative impacts of shrub encroachment depending on the functions and the traits of the sprouting or nonsprouting shrub species considered. FD and CWM were equally important as drivers of multifunctionality responses to both aridity and shrub encroachment. Size traits (e.g. vegetative height or lateral spread) and leaf traits (e.g. specific leaf area and leaf dry matter content) captured the effect of shrub encroachment on multifunctionality with a relative high accuracy ( r 2  = 0.63). FD also improved the resistance of multifunctionality along the aridity gradient studied. Maintaining and enhancing FD in plant communities may help to buffer negative effects of ongoing global environmental change on dryland multifunctionality.

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