Virginia Institute of Marine Sciences

Other agencies

Collaborative Research: Does competition for nitrogen between autotrophs and heterotrophs control carbon fluxes in the western coastal Arctic?

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).

Scientists on this collaboration will investigate the microbial controls on the productivity of a coastal Arctic ecosystem by focusing on the competition between autotrophs and heterotrophs for nitrogen (N). In the winter and summer waters near Barrow, Alaska, supplemented with complementary international research opportunities, the PIs will measure in situ concentrations of key microbial and biogeochemical constituents, relevant uptake activities, and expression of key N cycling genes to address two hypotheses:

  1. The balance of autotrophy and heterotrophy in the Arctic is regulated both temporally and spatially by nitrate and light.
  2. Microbial community structure will vary according to the seasonal light cycle and the sources of available N. The observed lag in bacterial response to phytoplankton growth is due to a community shift.

This collaborative research involves grants 0910252 (Yager, UGA, Lead) 0909647 (Frischer, Skidaway); and 0909839 (Bronk, VIMS). The researchers will study the near-shore marine food web, specifically the nitrogen cycle and how it is partitioned between microbial autotrophs and heterotrophs.

Logistics details under 0910252.

Data and Resources

  • View website
    Website :: ARMAP Logistics Report

  • View website
    Website :: Project

  • View metadata
    Metadata :: NSF_Award_Info

Status: Funded
Start Date: 2009/01/01
Type: Project
End Date: 2015/12/31
Primary Contact
Bronk, Deborah
Primary Agency
Virginia Institute of Marine Sciences

Funding Agency
National Science Foundation

Other Agencies
National Science Foundation

Alaska, Arctic, Northslope Borough

NSF 2015 Import - US Arctic, Ongoing North Slope Projects

Source Portal
North Slope Science Catalog ::

Direct Record Link