LITTERFALL AS A MEASURE OF PRIMARY PRODUCTION IN MEDITERRANEAN HOLM-OAK FOREST

In this paper we discuss the use of litterfall as a method to measure primary production an its between year relation to climatic fluctuation. Seven years of study in a mediterranean holm-oak forest showed a moderate inter-annual variability of litterfall (C.V. 11%), while the annual variability of the actual evapotranspiration was three times higher (C.V. 30%). Furthermore, the inter- and intra-annual variability of nutrient content in the various fractions are presented in relation to water availability. Monthly and seasonal variability was higher than the annual variability for all analyzed elements.