Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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NSF: An exploration of the direct and indirect effects of climatic warming on arctic lake ecosystems.


July 2016 - June 2021


Arctic lakes support trophic interactions, biological processes, and critical habitat at all trophic levels; however, climatic warming threatens to alter the structure and function of aquatic communities and overall system production. Arctic ecosystems are warming at some of the fastest rates observed on earth, and arctic lakes are experiencing more frequent years of warmer surface water and deeper mixing. However, the ability to detect and quantify ecosystem effects and specific biological responses (e.g. bacterial diversity, invertebrate production, fish growth) to these climatic changes has been primarily limited to non-mechanistic modeled scenarios and observational studies in uncontrolled environments. The proposed research will use a controlled whole-lake manipulation experiment to answer: How will warmer lake temperatures and extended growing season alter (1) lake ice coverage and annual thermal regime, (2) abundance, activity and diversity of primary and secondary producers, (3) fish vital rates and dynamics, and (4) degree of carry-over across growing seasons and cumulative effects on ecosystem production. The project is a collaboration of researchers across multiple academic entities including Oregon State University and the Marine Biological Lab, Woods Hole, MA. This research will quantify lake thermal processes and lake-atmosphere feedbacks, provide more precise projections of lake horizontal and vertical temperature structures, and document and
predict lake biota and ecosystem responses to lake thermal condition changes under different climate scenarios. By providing some of the first empirical evidence of how fundamental processes will actually change in the face of climate change, this research will also improve understanding of ecosystem service sustainability (e.g., subsistence fisheries).


Current Staff

Federal Staff: 101

Masters Students: 239

Phd Students: 154

Post Docs: 55

University Staff: 241

5 Year Summary

Students graduated: 695

Scientific Publications: 1962

Presentations: 4417



Funding Agencies

  • National Science Foundation: Arctic Natural Science


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey