Colleen M. Iversen
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  • CV
    • Refereed publications
    • Published data sets
    • Embroideries
    • Education and Experience
    • Honors and Awards
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    • Service and Professional Activities
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    • Invited Presentations
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    • PiTS
    • ORNL FACE >
      • Data-Model Interactions
      • Belowground harvest
      • Nutrient Cycling Throughout the Soil Profile
      • Digging Deeper
      • Missing Links in the Root-SOM Continuum
      • Root-Derived Input to the Soil
      • Nitrogen Limitation
      • Root decomposition
    • Nutrient-limited peatlands
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Differentiating Arctic PFTs

​based on root nitrogen acquisition.

​In July, 2013, we injected a 15N tracer into the rooting zone at three targeted depth intervals (organic layer, mineral soil, and the permafrost boundary) in order to characterize nitrogen acquisition for species representing three important plant functional types (PFTs) on the Barrow Ecological Observatory near Barrow, AK.

​The amount of nitrogen acquired from different depths throughout the soil profile is being used to refine definitions of PFTs in arctic models. ​

Press.

Root traits and nutrient competition approach explain NGEE-Arctic observations 
​
Tracking nitrogen in Arctic plants - Prevailing nutrient uptake models do not fit Arctic plants ​

Publications.

Zhu Q, Iversen CM, Riley WJ, Slette IJ, Vander Stel HM. 2017. Root traits explain observed tundra vegetation nitrogen uptake patterns: Implications for trait-based land models. Journal of Geophysical Research: Biogeosciences 121: 3101-3112.

Related Publications.

Song X, Hoffman FM, Iversen CM, Yin Y, Kumar J, Ma C, Xu X. 2017. Significant inconsistency of vegetation carbon density in CMIP5 Earth System Models against observational data. Journal of Geophysical Research - Biogeosciences 122: 2282-2297.

Wullschleger SD, Epstein HE, Box EO, Euskirchen ES, Goswami S, Iversen CM, Kattge J, Norby RJ, van Bodegom PM, Xu X. 2014. Plant functional types in Earth System Models: Past experiences and future directions for application of dynamic vegetation models in high-latitude ecosystems. Annals of Botany 114: 1-16.

Data Sets.

This research is funded by the Office of Biological and Environmental Research in the U.S. Department of Energy's Office of Science.

Related projects.

Plant Traits
Arctic PFTs
Carbon and Nutrient Mineralization
Plants and Polygons
​The Unseen Iceberg
  • Home
  • CV
    • Refereed publications
    • Published data sets
    • Embroideries
    • Education and Experience
    • Honors and Awards
    • External Funding
    • Service and Professional Activities
    • Press and Public Outreach
    • Invited Presentations
    • Presentations at Annual Meetings
  • Current Projects
  • Completed Projects
    • PiTS
    • ORNL FACE >
      • Data-Model Interactions
      • Belowground harvest
      • Nutrient Cycling Throughout the Soil Profile
      • Digging Deeper
      • Missing Links in the Root-SOM Continuum
      • Root-Derived Input to the Soil
      • Nitrogen Limitation
      • Root decomposition
    • Nutrient-limited peatlands
  • People
  • Contact
  • Learn More