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University of Northern Iowa

Faculty Publications

Nitrogen

Publication Year

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Effectiveness Of Cattail (Typha Spp.) Management Techniques Depends On Exogenous Nitrogen Inputs, Kenneth J. Elgersma, Jason P. Martina, Deborah E. Goldberg, William S. Currie May 2017

Effectiveness Of Cattail (Typha Spp.) Management Techniques Depends On Exogenous Nitrogen Inputs, Kenneth J. Elgersma, Jason P. Martina, Deborah E. Goldberg, William S. Currie

Faculty Publications

Wetlands occupy a position in the landscape that makes them vulnerable to the effects of current land use and the legacies of past land use. Many wetlands in agricultural regions like the North American Midwest are strongly affected by elevated nutrient inputs as well as high rates of invasion by the hybrid cattail Typha × glauca. These two stressors also exacerbate each other: increased nutrients increase invasion success, and invasions increase nutrient retention and nutrient loads in the wetland. This interaction could create a positive feedback that would inhibit efforts to manage and control invasions, but little is known …


Biochar Amendment Of Grassland Soil May Promote Woody Encroachment By Eastern Red Cedar, Ramesh Laungani, Kenneth Elgersma, Maria Juarez, Kristin Mcelligott, Tyler Kuhfahl Jan 2016

Biochar Amendment Of Grassland Soil May Promote Woody Encroachment By Eastern Red Cedar, Ramesh Laungani, Kenneth Elgersma, Maria Juarez, Kristin Mcelligott, Tyler Kuhfahl

Faculty Publications

Although carbon (C) additions to soil have been used in restoration to combat invasive species through changes in soil nitrogen (N) availability, carbon amendments to soil derived from plant material can impact soil N availability in a species-specific manner. As such, amendment-driven feedbacks on N may impact invasive species success and woody encroachment. Soil amendments like biochar, which is often added to soil to increase C storage in grassland systems, may unintentionally encourage woody encroachment into these grasslands by changing soil N dynamics. Few studies have examined biochar impacts on non-agricultural species, particularly invasive species. Woody encroachment of Eastern Red …