Abstract Project: KOP171

Microbial carbon turnover and greenhouse gas formation from permafrost soils revealed by 14CO2 analysis

Janet Rethemeyer (Univ.Cologne)

Temperature rise and permafrost thaw are expected to accelerate microbial organic matter decomposition and its respiration to CO2 creating a positive climate feedback. Information on the organic carbon inventory, its biochemical properties and microbial degradability, however, are limited particularly for the High Arctic (>70°N). Therefore, the objective of our study is to determine the rates and sources of CO2 emissions from permafrost soils both, in the field and in lab experiments using carbon isotopic analysis ( 13C, 14C). We also study their relationship with environmental parameters such as temperature, soil moisture, organic matter quality, and microbial communities and their activity.

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