Séminaire de Harri VASANDER (Professeur à l'Université d'Helsinki)


 Olivier Troccaz    24/07/2014 : 11:00

peatland.jpg

Le jeudi 24 juillet 2014 à 11h00, en salle de conférences de l'OSUR, campus de Beaulieu, bât.

Le jeudi 24 juillet 2014 à 11h00, en salle de conférences de l'OSUR, campus de Beaulieu, bât. 14b, UR1


Role of peatlands in the regulation of global carbon cycle




Résumé :
Peatlands only cover 3% of continental areas but succeeded in storing approximately one third of the global soil carbon through the Holocene. They have been recognized as a strong regulator of the atmosphere C cycle. The C-sink function is driven by a long term imbalance between C-fixation by vegetation and C-release by decomposition, resulting in peat accumulation. Whatever the kind of peatlands, peat is the remains of plant and animal constituents accumulating under more or less-saturated conditions owing to incomplete decomposition.
There is a wide range of peatlands across latitudinal gradients, from tropical afforested peatlands to boreal Sphagnum-dominated peatlands. In every case, the C-sink functioning of peatlands is very sensitive to environmental changes and anthropogenic disturbances. The aim of the conference is to present the functional of pristine and disturbed peatlands and to compare the role of tropical and boreal peatlands in the regulation of the global C-cycle. In addition, some examples of peatland-restoration and monitoring after exploitation will be discussed.

Contact : Harri VASANDER




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