Roles of land-use and climate change on the establishment and regeneration dynamics of Mediterranean semi-deciduous oak forests

[EN] Long-term changes in climate and land use have significant effects on the forest dynamics in formerly managed landscapes. To quantify the relative importance of climatic and land-use factors on tree establishment at regional scales, retrospective analyses are required. In this paper, we provide an historical reconstruction of the establishment of Mediterranean oak (. Quercus faginea) forests in the 20th century within the context of substantial changes in climate and changes in land use in the Spanish Pre-Pyrenees. Since the late 1930s, Q. faginea became established episodically, and the highest peak occurred between 1965 and 1975. Tree establishment was negatively correlated with mean summer maximum temperature, population size of nearby villages, and the amount of livestock, but was positively correlated with annual, winter, and winter-spring precipitation. This study revealed that assessments of the effects of land-use and climate changes on historical forest recruitment are vital in understanding the structure of contemporary forests. © 2012 Elsevier B.V..The Spanish Ministry of Education and Science (projects CICYT CGL2008-00655/BOS and CGL2008-04847-C02-01/BOS) funded this research. A MAEC-AECID grant from the Spanish Agency for International Cooperation and Development supported the first author. J.J. Camarero is grateful for the support of ARAID and the Globimed Network (www.globimed.net). We thank A.Q. Alla, G. Sangüesa-Barreda, and P.N. Galve for assisting in the collecting of field data, and the Agencia Estatal de Meteorología for providing weather data.Peer Reviewe