Presentation 1:
Simeon Choo (Baltic TRANSCOAST PhD candidate, Leibniz Institute for Baltic Sea Research Warnemünde)
Presentation 2:
Dr. Heli Juottonen (University of Jyväskylä, Finland)
"Decomposer and methane-cycling microbes and ecosystem carbon cycling along a peatland development gradient"
Abstract: As large carbon stores, peatlands have a key role in controlling the atmospheric CO2 and CH4 concentrations. Environmental conditions together with the interplay of primary producers and decomposers can determine whether a peatland is a carbon sink or carbon source. Northern peatlands are dynamic systems that generally have undergone succession from vascular plant dominated to Sphagnum moss dominated systems during their development. Similar rapid directional change has been found as a response to altered hydrology as a part of global change. We studied microbial communities and ecosystem functions along a peatland chronosequence at the land uplift coast of the Gulf of Bothnia in Finland. The chronosequence ranged from the recently exposed sea shore to young fens to the fen-bog transition and the oldest Sphagnum bogs. We asked how the community changes of plants, saprophytic decomposers and methane-cycling microbes are linked along the peatland development gradient and how the changes relate to ecosystem processes in carbon cycling.
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