Julie Loisel, Zicheng Yu, Paolo D’Odorico
Proceedings of the 14th International Peat Congress
conceptual-and-process-based-models, fen-bog-transition, non-linear-ecosystem-shift, paleoecology, patagonia
Theme I. Inventory, stratigraphy and conservation of mires and peatlands
We use peatlands from southern Patagonia as model examples to investigate the role of regional-scale allogenic controls on the fen-bog transition, an important regime shift that had occurred throughout high-latitude regions of both hemispheres and that likely impacted the global carbon cycle through a major change in the rate of methane emissions and peat-carbon sequestration. In addition to documenting the mid-Holocene fen-bog transition in Patagonia, our goals are: (1) to identify and describe key fen and bog stability properties, and (2) to integrate these mechanisms into conceptual and process-based models. We argue that peatlands are ‘complex adaptive systems’, and that a reappraisal and better understanding of fundamental and important peatland processes such as the fen-bog transition under this view is critical to better assess the role of external forcing such as climate change on peatland structure and functioning.