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Universidad ALMERÍA (2015)

ECOPHYSILOGICAL RESPONSE OF SEMIARID MEDITERRANEAN GRASSLAND TO CLIMATE CHANGE

LADRÓN DE GUEVARA SÁEZ DE EGUÍLAZ, MÓNICA

Titre : ECOPHYSILOGICAL RESPONSE OF SEMIARID MEDITERRANEAN GRASSLAND TO CLIMATE CHANGE

RESPUESTA ECOFISIOLÓGICA DEL ESPARTAL MEDITERRÁNEO SEMIÁRIDO AL CAMBIO CLIMÁTICO

Auteur : LADRÓN DE GUEVARA SÁEZ DE EGUÍLAZ, MÓNICA

Université de soutenance : Universidad ALMERÍA

Grade : Doctor en Ciencias Aplicadas al Medio Ambiente 2015

Résumé
Climate change is a component of the several planetary-scale shifts that are currently taking place in the Earth system, which as a whole are referred to as global change. However, climate, as a vector of energy and material fluxes, has the ability to interact with all the elements (including natural and social components) of the Earth system, also influencing their dynamics. The Mediterranean-European region has been identified as one of the most prominent climate response hot spots, and precipitation patterns are major limiting factors for human activities and natural ecosystems in this area. Climate model projections forecast an increase of 4–5°C over the course of this century in the Mediterranean-European region, and although with less confidence in specific values, they also detect a robust signal of change in precipitation patterns. These changes will consist of a decrease in the amount and frequency of precipitation, and an intensification of extreme precipitation events. Macrochloa tenacissima is a rhizomatous, C3 perennial tussock grass widespread and endemic in Western Mediterranean drylands, and is one of the few species that is usually dominant in its community. The soil in the interspaces of these tussocks is frequently covered by biological soil crust (BSC or biocrust), a community of organisms made up of cyanobacteria, green algae, heterotrophic bacteria, microfungi, lichens and bryophytes. Therefore, the major goal of this thesis is to estimate the effects of climate change on the ecophysiology of these two dominant functional types of the semiarid Western Mediterranean region

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Page publiée le 29 novembre 2015, mise à jour le 9 février 2018