Mountain View

Predicting effects of climate warming on stream ecosystem structure and function

non-snowy mountainsSnowy Mountains

We are currently studying the influence of temperature and nutrient supply (i.e., nitrogen and phosphorus) on the structure and function of stream ecosystems in the Hengill region of Iceland. Streams in this area are variably warmed by geothermal heat, with mean temperatures ranging from 5°C to 30°C. Although temperatures are variable, stream solute chemistry is remarkably similar due to the indirect warming of groundwater. Thus, streams in this area provide a unique natural laboratory for examining interacting effects of climate warming and eutrophication on stream structure and function. 

We’re testing predictions about how food web dynamics and ecosystem processes will change with climate warming using two unifying frameworks - (1) biological stoichiometry and (2) metabolic theory of ecology. Because these frameworks are based on first principles (e.g., conservation of mass, thermodynamics), we expect our results to be generally applicable to other ecosystems.  

We have developed strong collaborations with our colleagues in Europe, and we are now able to accomplish much more as a larger team with complementary areas expertise.

The Team

The Team

International colleagues and collaborators