When considering sources of greenhouse gases, lakes and reservoirs may not immediately come to mind, but they are a significant part of the global greenhouse gas budget. Bridget Deemer is a research ecologist at the U.S. Geological Survey’s Grand Canyon Monitoring and Research Center. Her research aims to understand how human activities are affecting the way that energy and nutrients cycle through ecosystems. She also continues to be involved in efforts to understand methane emissions from lakes and reservoirs, including Lake Powell.

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