Peralta de Andrés, Francisco Javier
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Peralta de Andrés
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Francisco Javier
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Publication Open Access Decoupling of traditional burnings and grazing regimes alters plant diversity and dominant species competition in high-mountain grasslands(Elsevier, 2021) Múgica Azpilicueta, Leire; Canals Tresserras, Rosa María; San Emeterio Garciandía, Leticia; Peralta de Andrés, Francisco Javier; Agronomia, Bioteknologia eta Elikadura; Zientziak; Institute on Innovation and Sustainable Development in Food Chain - ISFOOD; Agronomía, Biotecnología y Alimentación; Ciencias; Universidad Pública de Navarra / Nafarroako Unibertsitate PublikoaOver millennia, the combination of controlled burnings and extensive grazing has maintained mosaic landscapes and preserved mountain grasslands in southern Europe. In the last century, deep socio-economic changes have led to an abandonment of traditional uses, to a general decline of the domestic herbivory and to a misuse of burning practices. This study aims to quantify how the decoupling of burning and grazing regimes affects in the long-term the structure, diversity and dynamics of high-mountain, shrub-encroached grasslands. In spring 2012, four treatments (burned-grazed, burned-ungrazed, unburned-grazed and unburned-ungrazed) were set up at three sites in the Special Area of Conservation Roncesvalles-Selva de Irati, in southwest Pyrenees. During seven years, we monitored floristic composition and the height of the native tall-grass Brachypodium rupestre in four plots at each site. In the burned plots, we surveyed the resprout of the dominant shrub Ulex gallii and the dynamics of recovering of the herbaceous vegetation. Plant communities evolved differently in grazed and ungrazed plots. Extensive grazing, despite being lower than in previous decades, maintained plant diversity and limited shrub encroachment. The total absence of grazing fostered the encroachment of U. gallii at two sites and the expansion of B. rupestre at the other site. When B. rupestre cover was >60%, the encroachment of U. gallii was reduced. This research highlights the competition that occurs between shrubs and tall-grasses in the absence of grazing, and the modulating effect exerted by the burnings and the site-specific features. Understanding local plant dynamics is the first step to design the most appropriate practices that help to preserve diversity at the landscape and the community level in high-mountain grasslands of south Europe.Publication Open Access 4ª Edición de la Escuela de Verano de Ecología de la UPNA 2018(Asociación Española de Ecología Terrestre (AEET), 2018) Canals Tresserras, Rosa María; Peralta de Andrés, Francisco Javier; Agronomía, Biotecnología y Alimentación; Agronomia, Bioteknologia eta Elikadura; Ciencias; ZientziakNoticia de la celebración de la cuarta edición de la Escuela de Verano de Ecología de la Universidad Pública de Navarra (UPNA), los días 3 y 4 de septiembre de 2018, en el Parque Natural del Señorío de Bertiz (Navarra), bajo el título 'Observando la Biodiversidad: desde la investigación científica a la ciencia ciudadana'.