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Springshed Assessment Methods For Paleozoic Bedrock Springs Of Southeastern Minnesota, Jeffrey A. Green
Springshed Assessment Methods For Paleozoic Bedrock Springs Of Southeastern Minnesota, Jeffrey A. Green
KIP Data Sets and Technical Reports
Jeffrey A. Green 1, John D. Barry 1, and E. Calvin Alexander, Jr. 2 1Minnesota Department of Natural Resources 2Department of Earth Sciences, University of Minnesota Introduction: Springs are the natural discharge points for groundwater. They provide baseflow for streams and in the case of trout streams are critical sources of isothermal water. They are commonly found emerging from the Paleozoic sedimentary rocks of southeastern Minnesota where river valleys cut deeply through the water-bearing bedrock layers. The different lithology and hydraulic properties (hydrostratigraphy) of the rock types makes some settings more likely for springs. Our research on springs focused on …
Pages - Past Global Changes Magazine Formerly Pages News, International Geosphere-Biosphere Programme
Pages - Past Global Changes Magazine Formerly Pages News, International Geosphere-Biosphere Programme
PAGES
No abstract provided.
Nitrogen Inputs And Losses In Response To Chronic Co2 Exposure In A Subtropical Oak Woodland, B. A. Hungate, B. D. Duval, P. Dijkstra, D. W. Johnson, M. E. Ketterer, Peter Stiling, W. Cheng, J. Millman, A. Hartley, D. B. Stover
Nitrogen Inputs And Losses In Response To Chronic Co2 Exposure In A Subtropical Oak Woodland, B. A. Hungate, B. D. Duval, P. Dijkstra, D. W. Johnson, M. E. Ketterer, Peter Stiling, W. Cheng, J. Millman, A. Hartley, D. B. Stover
Integrative Biology Faculty and Staff Publications
Rising atmospheric CO2 concentrations may alter the nitrogen (N) content of ecosystems by changing N inputs and N losses, but responses vary in field experiments, possibly because multiple mechanisms are at play. We measured N fixation and N losses in a subtropical oak woodland exposed to 11 years of elevated atmospheric CO2 concentrations. We also explored the role of herbivory, carbon limitation, and competition for light or nutrients in shaping the response of N fixation to elevated CO2. Elevated CO2 did not significantly alter gaseous N losses, but lower recovery and deeper distribution in the …
Pages - Past Global Changes Magazine Formerly Pages News, International Geosphere-Biosphere Programme
Pages - Past Global Changes Magazine Formerly Pages News, International Geosphere-Biosphere Programme
PAGES
No abstract provided.