【泥炭生物群落】Angela V. Gallego-Sala & I. Colin Prentice.Blanket peat biome endangered by climate change. Nature Climate Change 2013 3: 152–155
Abstract
Blanket bog is a highly distinctive biome restricted to disjunct hyperoceanic regions. It is characterized by a landscape covering of peat broken only by the steepest slopes1. Plant and microbial life are adapted to anoxia low pH and low nutrient availability. Plant productivity exceeds soil organic matter decomposition so carbon is sequestered over time. Unique climatic requirements including high year-round rainfall and low summer temperatures2 make this biome amenable to bioclimatic modelling. However projections of the fate of peatlands in general and blanket bogs in particular under climate change have been contradictory3 4 5 6 7. Here we use a simple well-founded global bioclimatic model8 with climate-change projections from seven climate models to indicate this biome’s fate. We show marked shrinkage of its present bioclimatic space with only a few restricted areas of persistence. Many blanket bog regions are thus at risk of progressive peat erosion and vegetation changes as a direct consequence of climate change. New areas suitable for blanket bog are also projected but these are often disjunct from present areas and their location is inconsistently predicted by different climate models.