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Stocks et flux de carbone dans les forêts françaises.

doi: 10.4267/2042/5399
De par la masse importante de carbone qu'elles contiennent (81 % du carbone de la biomasse terrestre) et en raison de la lenteur des cycles forestiers, les forets pourraient contribuer a limiter l'effet de serre, en immobilisant a moyen ou long terme une part du carbone emis lors de l'utilisation de sources d'energies fossiles. Le stock de carbone dans la biomasse des forets francaises est evalue a 860 MtC pour 14,5 millions d'hectares de foret, celui des sols a 1 140 MtC. Le stock total des forets francaises est donc de 2 000 MtC. Le stockage net a ete dans les forets francaises de 10,5 MtC/an entre 1979 et 1991, soit 10 % de nos emissions annuelles de carbone fossile. Ce puits est lie a l'accroissement de la surface forestiere, de la productivite des peuplements, au vieillissement de la foret francaise alors que les niveaux de prelevements de bois restent tres moderes (61 % de la croissance). Nous discutons enfin les options forestieres permettant d'accroitre cette fonction puits de la foret : augmentation des surfaces forestieres, utilisation d'essences a croissance rapide, vieillissement des peuplements, diminution du niveau des eclaircies et du travail du sol, mise en reserve integrale...
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, [SDE] Environmental Sciences, FORET, [SDV]Life Sciences [q-bio], Forests, Modification climat, BIOMASS, CYCLE BIOGEOCHIMIQUE, GESTION DES RESSOURCES, CARBON, PRODUIT FORESTIER, Combustible fossile, Carbone organique, Biomasse, EFNO, Biomass, Regional study, Silviculture, Sol forestier -- Europe, Material flow, SOL DE FORET, RESSOUCE MANAGEMENT, [SDV.SA] Life Sciences [q-bio]/Agricultural sciences, Prescription technique, Fossil fuel, Carbon cycle, Flux matière, Biogeochemistry, CARBONE, [SDV] Life Sciences [q-bio], AMENAGEMENT FORESTIER, FOREST SOILS, Forêt, Source sink relationship, France, Stock, Biogéochimie, Technical prescription, Sylviculture, Carbone, CEMAGREF, Cycle carbone, Production forestière, FOREST PRODUCTS, FRANCE, Greenhouse effect, Temperate zone, FOREST MANAGEMENT, CYCLING FORESTS, Physical environment, Zone tempérée, Effet serre, Forest production, Forest soil -- Europe, Organic carbon, BIOMASSE, Climate modification, Environnement physique, Etude régionale, Carbon, Relation source puits, Carbon dioxide, Carbone dioxyde
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, [SDE] Environmental Sciences, FORET, [SDV]Life Sciences [q-bio], Forests, Modification climat, BIOMASS, CYCLE BIOGEOCHIMIQUE, GESTION DES RESSOURCES, CARBON, PRODUIT FORESTIER, Combustible fossile, Carbone organique, Biomasse, EFNO, Biomass, Regional study, Silviculture, Sol forestier -- Europe, Material flow, SOL DE FORET, RESSOUCE MANAGEMENT, [SDV.SA] Life Sciences [q-bio]/Agricultural sciences, Prescription technique, Fossil fuel, Carbon cycle, Flux matière, Biogeochemistry, CARBONE, [SDV] Life Sciences [q-bio], AMENAGEMENT FORESTIER, FOREST SOILS, Forêt, Source sink relationship, France, Stock, Biogéochimie, Technical prescription, Sylviculture, Carbone, CEMAGREF, Cycle carbone, Production forestière, FOREST PRODUCTS, FRANCE, Greenhouse effect, Temperate zone, FOREST MANAGEMENT, CYCLING FORESTS, Physical environment, Zone tempérée, Effet serre, Forest production, Forest soil -- Europe, Organic carbon, BIOMASSE, Climate modification, Environnement physique, Etude régionale, Carbon, Relation source puits, Carbon dioxide, Carbone dioxyde
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