Organic matter properties of Fennoscandian ecosystems: Potential oxidation of northern environments under future change?

摘要: The oxidative ratio (OR) of an ecosystem, which reflects the O2:CO2 associated with ecosystem gas exchanges, is important parameter in understanding sink CO2 represented by terrestrial biosphere. There a growing body ecosystem-based approaches to understand OR; however, there are still number unknowns. This study addressed two gaps our oxidation biosphere: (1) What state Arctic ecosystems, and particular permafrost soils? (2) Will coupled climate land use change cause organic matter change? considered eight locations along transect from southern Sweden northern Norway sampled different types (soil, litter, trees, herbaceous vegetation) as well soil orders (Inceptisols, Spodosols, Histosols, Gelisols). showed that although was no difference between orders, significant effect due location OR increasing 1.03 at southernmost 1.09 northernmost location; this increase independent order or type matter. pattern post hoc differences latitude suggests correlated limit arable agriculture. combined effects could lead decrease its state.