![]() ![]() Impacts of historical ditching on peat volume and carbon in northern Minnesota USA peatlands. Effects of snow and climate on soil temperature and frost development in forested peatlands in Minnesota, USA. Biases in open-path carbon dioxide flux measurements: Roles of instrument surface heat exchange and analyzer temperature sensitivity. Deventer, M Julian Roman, Tyler Bogoev, Ivan Kolka, Randall K.Hoboken, NJ: John Wiley & Sons, Inc.: 421-436. Wetland carbon and environmental management. The importance of wetland carbon dynamics to society: insight from the second state of the carbon cycle science report. Kolka, Randy Trettin, Carl Windham-Myers, Lisamarie.Accelerated microbial turnover but constant growth efficiency with warming in soil. van Groenigen, Kees Jan Allison, Steven D. Tropical wetlands, climate, and land-use change: adaptation and mitigation opportunities. Stability of peatland carbon to rising temperatures. Boca Raton, FL: CRC Press/Lewis Publishing: 277-309. Wetlands soils: genesis, hydrology, landscapes and classification. Soils of peatlands: histosols and gelisols. Proceedings of the National Academy of Sciences Prairie strips improve biodiversity and the delivery of multiple ecosystem services from corn-soybean croplands. Asbjornsen, Heidi Drobney, Pauline Neal, Jeri Van Ryswyk, Gary Witte, Chris. Adjunct Professor, Department of Soil, Water and Climate, University of Minnesota 2002 - Current.Graduate Faculty, Department of Forestry, University of Kentucky 2002 - Current.Adjunct Professor, Department of Forest Resources, University of Minnesota 2002 - Current.Adjunct Faculty, School of Forest Resources and Environmental Science, Michigan Technological University 2004 - Current.Associate Faculty, Department of Natural Resource Ecology and Management, Iowa State University 2004 - Current.Adjunct Professor, Department of Biological Sciences, North Dakota State University 2008 - Current.Faculty of Graduate Studies, Faculty of Natural Resources Management, Lakehead University 2012 - Current.University of Wisconsin - Stevens Point, B.S. ![]() Our work is helping fill this important knowledge gap. One of the great uncertainties in climate modeling is the feedbacks that terrestrial systems have on atmospheric carbon, most notably on the green house gases carbon dioxide and methane. Investigating the landscape level influences on carbon storage and processing will lead to a better understanding of implications of climate change. Understanding how management can lessen mercury inputs and/or increase storage in terrestrial systems is critical for human health and the fishing industry. In the Lake States, mercury is of high concern because of its potential to bioaccumulate in the aquatic food chain. This is demonstrated by the numerous issues surrounding the development of Best Management Practices for forest and agricultural systems and regulations that are being imposed by the Environmental Protection Agency (e.g. Why This Research is ImportantThe transport on nonpoint source pollutants including nutrients such as nitrogen and phosphorus are the number one concern regarding the impacts on aquatic ecosystems. My mercury work is focused on two main efforts, one to characterize the mercury cycle under increased sulfate deposition and a second to understand the influence of prescribed fire on mercury cycling. The ecosystem carbon work also extends into characterizing the pools of coarse woody debris in forested riparian areas and streams. My carbon work includes studies looking at landscape level carbon pools and emissions across number of ecosystems including peatlands, and a variety upland vegetation types. Nutrient work also includes the effect of stream restoration on nutrient cycling. Nutrient work includes studies related to Forestry Best Management Practices in riparian and wetland systems and work aimed at understanding the influence of strategically placed perennial vegetation in agricultural watersheds. I study the effect of land management (forest, agriculture and urban land uses) on the terrestrial and aquatic cycling of nutrients, carbon, heavy metals (notably mercury) and water.Ĭurrently I'm working on numerous studies to assess nutrient, carbon and mercury pools and processes in variety of ecosystems. ![]()
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