Climatic Influence on Oak Landscape Distributions

Abstract

Climate is one determinant of the distribution and structure of California oak woodlands and Spanish dehesas. We summarize studies conducted in the two regions that use different methodologies to investigate the influence of climate on the distribution of oak species in California and on the development of dehesa silvopastoral systems in Spain. Results show some common climatic characteristics, mainly strong summer drought, medium to low overall year rainfall, and high summer temperatures. However, the influence of climate on oak distribution and management differs sharply. Climate strongly influences oak distribution in California. However, it has little effect on whether or not oak forests are managed as dehesa in Spain. Soil characteristics and socioeconomic issues are more important factors than climate for the creation and maintenance of dehesas in Spain.