2 Works

Data from: Low photosynthesis of treeline white spruce is associated with limited soil nitrogen availability in the Western Brooks Range, Alaska

Robert W. McNown & Patrick F. Sullivan
1. The prevailing hypothesis states that treeline positions are defined by the direct effects of cold temperatures on cell division and tree growth. Meanwhile, photosynthesis is thought to be relatively unrestricted in treeline trees. Support for this hypothesis comes from the global correlation between temperature and treeline position, the observation that many treelines have advanced in response to recent warming and the frequent use of increment cores from treeline trees to reconstruct past climates. However,...

Data from: Distribution and drivers of ectomycorrhizal fungal communities across the North American Arctic

Ina Timling, Anders Dahlberg, Donald Arthur Walker, Monique Gardes, Jean-Yves Charcosset, Jeffrey M. Welker & Donald Lee Taylor
Ectomycorrhizal fungi (EMF) form symbioses with a few plant species that comprise a large fraction of the arctic vegetation. Despite their importance, the identity, abundance and distribution of EMF in the Arctic, as well as the key drivers controlling their community composition are poorly understood. In this study, we investigated the diversity and structure of EMF communities across a bioclimatic gradient spanning much of the North American Arctic. We collected roots from two principal arctic...

Registration Year

  • 2012
    2

Resource Types

  • Dataset
    2

Affiliations

  • University of Alaska Anchorage
    2
  • University of Alaska System
    1
  • Laboratoire Ecologie Fonctionnelle et Environnement
    1
  • Laboratory Evolution and Biological Diversity
    1