Litterfall and litter decomposition in chestnut high forest stands in northern Portugal

  • M.S. Patricio 1Mountain Research Center (CIMO), Polytechnic Institute of Bragança, School of Agriculture, Campus Sta. Apolónia
  • L.F. Nunes 1Mountain Research Center (CIMO), Polytechnic Institute of Bragança, School of Agriculture, Campus Sta. Apolónia
  • E.L. Pereira 1Mountain Research Center (CIMO), Polytechnic Institute of Bragança, School of Agriculture, Campus Sta. Apolónia


This research aimed to: estimate the inputs of litterfall; model the decomposition process and assess the rates of litter decay and turnover; study the litter decomposition process and dynamics of nutrients in old chestnut high forests. This study aimed to fill a gap in the knowledge of chestnut decomposition process as this type of ecosystems have never been modeled and studied from this point of view in Portugal. The study sites are located in the mountains of Marão, Padrela and Bornes in a west-to-east transect, across northern Portugal, from a more-Atlantic-to-lessmaritime influence. This research was developed on old chestnut high forests for quality timber production submitted to a silviculture management close-to-nature. We collected litterfall using littertraps and studied decomposition of leaf and bur litter by the nylon net bag technique. Simple and double exponential models were used to describe the decomposition of chestnut litterfall incubated in situ during 559 days. The results of the decomposition are discussed in relation to the initial litter quality (C, N, P, K, Ca, Mg) and the decomposition rates. Annually, the mature chestnut high-forest stands (density 360-1,260 tree ha–1, age 55-73 years old) restore 4.9 Mg DM ha–1 of litter and 2.6 Mg ha–1 yr–1 of carbon to the soil. The two-component litter decay model proved to be more biologically realistic, providing a decay rate for the fast initial stage (46-58 yr–1for the leaves and 38-42 yr–1for the burs) and a decay rate related to the recalcitrant pool (0.45-0.60 yr–1for the leaves and 0.22-0.36 yr–1for the burs). This study pointed to some decay patterns and release of bioelements by the litterfall which can be useful for calibrating existing models and indicators of sustainability to improve both silvicultural and environmental approaches for the management of chestnut forests.


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How to Cite
PatricioM., NunesL., & PereiraE. (2012). Litterfall and litter decomposition in chestnut high forest stands in northern Portugal. Forest Systems, 21(2), 259-271.
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