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Rick Relyea

Rick A. Relyea is a Professor of Biology at the University of Pittsburgh and Director of the Pymatuning Laboratory of Ecology. He also has a strong interest in high school education. Besides helping teachers perform research in his laboratory, he conducts summer workshops for high school teachers in the fields of ecology and evolution. He also works to bring cutting-edge research experiments into high school classrooms.  Professor Relyea regularly teaches courses in ecology, evolution, and animal behavior at the undergraduate and graduate level. He received a B.S. in Environmental Forest Biology from the State University of New York College of Environmental Science and Forestry, a M.S. in Wildlife Management from Texas Tech University, and a Ph.D. in Ecology and Evolution from the University of Michigan.  For two decades, Relyea has conducted research on a wide range of topics including community ecology, evolution, disease ecology, and ecotoxicology. He has served on multiple scientific panels for the National Science Foundation and is an Associate Editor for the journals of the Ecological Society of America. He has authored more than 80 scientific articles and book chapters, and has presented research seminars throughout the world. In 2005, he was named the Chancellor's Distinguished Researcher at the University of Pittsburgh.

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William F. Ruddiman

William F.  Ruddiman was initially trained as a marine geologist. His subsequent work over many years has explored several different aspects of the field of paleoclimate. His earliest research was on orbital-scale changes in North Atlantic sediments to reconstruct past sea-surface temperatures and to quantify the deposition of ice-rafted debris. He also studied the way that vertical mixing by sea-floor organisms smoothes deep-sea climatic records. Later, his interests turned to the cause of long-term cooling over the last 50 million years. This research led to a new hypothesis that uplift of the Tibetan Plateau has been a major driver of that cooling, with Maureen Raymo's work on chemical weathering a central part of that hypothesis. That research also demonstrated that Tibetan uplift created much of the seasonally alternating monsoon climate that dominates eastern Asia today. Since entering 'semi-retirement' in 2001, Ruddiman's research has concentrated on the climatic role farmers played during the last several thousand years by clearing land, raising livestock, and irrigating rice padis. This research produced the 'early anthropogenic hypothesis' --- the idea that early agriculturalists caused an anomalous reversal in natural declines of atmospheric CO2 7000 years ago and CH4 5000 years ago. His research on this issue has been NSF-funded for several years. Because this hypothesis has been very controversial, it has provoked many studies seeking ways to test it.

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