Proceedings of the National Academy of Sciences of the United States of America

About the PNAS Member Editor
Name Carpenter, Stephen R.
Location University of Wisconsin-Madison
Primary Field Environmental Sciences and Ecology
Secondary Field Human Environmental Sciences
 Election Citation
Carpenter is a leader in lake ecosystem science. He showed how fish control lake productivity and nutrient cycling, and his manipulations of entire lakes have brought whole-ecosystem experimentation to a new level of sophistication.
 Research Interests
I have done considerable work on the biological regulation of carbon fixation and phosphorus cycling in lakes. By experimental manipulation of entire lakes, this research has shown how food web structure controls phosphorus allocation and mineralization, carbon fixation, and gas exchange between lakes and the atmosphere. I am currently investigating the roles of carbon fixation by phytoplankton and other plants, as well as inputs of carbon from the surrounding landscape, in aquatic food webs. Other recent studies have centered on the ecology of regime shifts in ecosystems, such as the changes caused by habitat alteration, overharvest or overfertilization, invasion, and extinction. Working with economists, mathematicians, and other ecologists, I am exploring methods to collapse or preserve regimes. The approaches that preserve ecological regimes tend to be ones that main ecological variability within broad thresholds.

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