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
Loisel et al 2012: Peatland Dynamics in Patagonia: Abrupt Mid-Holocene Fen-to-Bog Transition and Carbon Sequestration Impl
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.