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GIS Coop: networks of silvicultural trials for supporting forest management under changing environment

I. Seynave,A. Bailly,P. Balandier,J. Bontemps,Priscilla Cailly,T. Cordonnier,C. Deleuze,J. Dhote,C. Ginisty,F. Lebourgeois,D. Merzeau,E. Paillassa,S. Perret,C. Richter,C. Meredieu

Published 2018 in Annals of Forest Science

ABSTRACT

Key messageThe diversity of forest management systems and the contrasted competition level treatments applied make the experimental networks of the GIS Coop, a nationwide testing program in the field of emerging forestry topics within the framework of the ongoing global changes.ContextTo understand the dynamics of forest management systems and build adapted growth models for new forestry practices, long-term experiment networks remain more crucial than ever.AimsTwo principles are at the basis of the experimental design of the networks of the Scientific Interest Group Cooperative for data on forest tree and stand growth (GIS Coop): contrasted and extreme silvicultural treatments in diverse pedoclimatic contexts.MethodsVarious forest management systems are under study: regular and even-aged stands of Douglas fir, sessile and pedunculate oaks, Maritime and Laricio pines, mixed stands of sessile oak, European silver fir, and Douglas fir combined with other species. Highly contrasted stand density regimes, from open growth to self-thinning, are formalized quantitatively.ResultsOne hundred and eighty-five sites representing a total of 1206 plots have been set up in the last 20 years, where trees are measured regularly (every 3 to 10 years). The major outputs of these networks for research and management are the calibration/validation of growth and yield models and the drawing up of forest management guides.ConclusionThe GIS Coop adapts its networks so that they can contribute to develop growth models that explicitly integrate pedoclimatic factors and thus also contribute to research on the sustainability of ecosystems under environmental and socio-economic changes.

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