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      Ecological and environmental transition across the forested-to-open bog ecotone in a west Siberian peatland

      Ratcliffe, Joshua Lee; Creevy, Angela; Andersen, Roxane; Zarov, Evgeny; Gaffney, Paul P.J.; Taggart, Mark A.; Mazei, Yuri; Tsyganov, Andrey N.; Rowson, James G.; Lapshina, Elena D.; Payne, Richard J.
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      STOTEN-D-17-03111 - revised manuscript - no_marked_changes.pdf
      Accepted version, 1.192Mb
      DOI
       10.1016/j.scitotenv.2017.06.276
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      Ratcliffe, J. L., Creevy, A., Andersen, R., Zarov, E., Gaffney, P. P. J., Taggart, M. A., … Payne, R. J. (2017). Ecological and environmental transition across the forested-to-open bog ecotone in a west Siberian peatland. Science of The Total Environment, 607, 816–828. https://doi.org/10.1016/j.scitotenv.2017.06.276
      Permanent Research Commons link: https://hdl.handle.net/10289/11367
      Abstract
      Climate change may cause increasing tree cover in boreal peatlands, and the impacts of this encroachment will be noted first at forested-to-open bog ecotones. We investigate key metrics of ecosystem function in five such ecotones at a peatland complex in Western Siberia. Stratigraphic analysis of three cores from one of these transects shows that the ecotone has been dynamic over time with evidence for recent expansion of forested peatland. We observed that the two alternative states for northern boreal peatlands (forested/open) clearly support distinct plant and microbial communities. These in turn drive and respond to a number of feedback mechanisms. This has led to steep ecological gradients across the ecotones. Tree cover was associated with lower water tables and pH, along with higher bulk density, aquatic carbon concentrations, and electrical conductivity. We propose that the conditions found in the forested peatland of Western Siberia make the carbon sink more vulnerable to warmer and drier conditions.
      Date
      2017
      Type
      Journal Article
      Publisher
      Elsevier
      Collections
      • Science and Engineering Papers [3122]
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