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Contribution of Vegetation and Soil components to Carbon cycle in Arctic environment in relationship to climate change (VegSoCA)
Call year: 2018
Status: active
IADC_id: 104
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In this project we will attempt to close some of important gaps highlighted in the last IPCC report concerning interactions of multiple abiotic (depth of the active layer, temperature, humidity) and biotic (species composition, litter input) factors in determining fluxes of CO2 and CH4 in Arctic environments. To do so, a multidisciplinary approach, including ecology, plant physiology and soil microbiology, will be combined with litter and air isotope composition manipulation techniques. Gradient in the depth of the active layer between two sites (around 4 km apart) in Ny Ålesund, Svalbard Islands, will host litter manipulation experimental plots in order to create the variability in the microclimatic conditions, plant species and plant biomass inputs. High time resolution 13C labelling/chasing experiments will be conducted on two plant species. In combination with gas exchange measurements, phenology surveys and biochemical analyses of above- and below-ground pools this approach will allow characterizing in details the C cycle in Arctic environment and predicting its potential variations with changing climate.
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