文章基本信息

标题：Tree-grass interactions in the south-western Iberian Peninsula dehesas and montados
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作者：Richard Joffre ; Serge Rambal
期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2006
卷号：17
期号：1
页码：340-342
出版社：John Libbey Eurotext
摘要：Authors Richard Joffre , Serge Rambal Centre d’écologie fonctionnelle et évolutive (Cefe), Équipe « Dynamique réactionnelle des écosystèmes, analyse spatiale et modélisation » (DREAM), Centre national de la recherche scientifique (CNRS), 1919, route de Mende, 34293 Montpellier cedex 5 France Key words: parkland, agroforestry, sylvopastoralism, Spain, Portugal Page(s) : 340-2 Published in: 2006 The dehesas and montados of the south-western Iberian Peninsula are man-made ecosystems characterized by a savanna-like physiognomy. The open tree stratum is dominated by three Mediterranean oak species, Quercus ilex, Q. suber, and Q. pyrenaica, whose densities range from 10 to 80 trees per hectare. In this paper, the key processes involved in the functioning of the dehesas are discussed, with particular reference paid to the significant modifications of environmental conditions induced by the presence of isolated trees. We describe how, in the face of the physiological constraints imposed by climatic stress, the changes in soil properties caused by the presence of trees increase the availability and uptake of soil water and permit a more efficient use of the limited water resource by the two life forms of vegetation: grass and trees.
关键词：parkland; agroforestry; sylvopastoralism; Spain; Portugal