Blanket peat biome endangered by climate change

Angela V. Gallego-Sala*, I. Colin Prentice

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    92 Citations (Scopus)

    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 slopes. 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 temperatures, 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 contradictory. Here we use a simple, well-founded global bioclimatic model, 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.

    Original languageEnglish
    Pages (from-to)152-155
    Number of pages4
    JournalNature Climate Change
    Volume3
    Issue number2
    DOIs
    Publication statusPublished - Feb 2013

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