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  • Patrick F. Sullivan, Sarah B. Z. Ellison, Robert W. McNown, Annalis H. Brownlee, Bjartmar Sveinbjörnsson
  • Medicine, Biology
  • Ecology
  • 2015 (First Publication: 1 March 2015)
  • The position of the Arctic treeline, which is a key regulator of surface energy exchange and carbon cycling, is widely thought to be controlled by temperature. Here, we present evidence that soilExpand
  • Bjartmar Sveinbjörnsson, Matthew Smith, Tumi Traustason, Roger W. Ruess, Patrick F. Sullivan
  • Geography, Medicine
  • Oecologia
  • 2010 (First Publication: 14 March 2010)
  • Two opposing hypotheses have been presented to explain reduced tree growth at the treeline, compared with growth in lower elevation or lower latitude forests: the carbon source and sink limitationExpand
  • Mats Sonesson, Åsa Grimberg, Bjartmar Sveinbjörnsson, Bengt Carlsson
  • Biology
  • 2011 (First Publication: 21 October 2011)
  • Abstract The lichens Parmelia olivacea and Parmeliopsis ambigua are common epiphytes in subarctic forests in Europe. They differ in abundance and vertical distribution particularly on birch trees,Expand