Search Results - "Wedin, D. A"

Mechanisms of plant species impacts on ecosystem nitrogen cycling by Knops, J. M. H., Bradley, K. L., Wedin, D. A.

“…Plant species are hypothesized to impact ecosystem nitrogen cycling in two distinctly different ways. First, differences in nitrogen use efficiency can lead to…”
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The relationships among root and leaf traits of 76 grassland species and relative abundance along fertility and disturbance gradients by Craine, J. M., Froehle, J., Tilman, D. G., Wedin, D. A., Chapin, III, F. S.

“…For 76 annual, biennial, and perennial species common in the grasslands of central Minnesota, USA, we determined the patterns of correlations among seven…”
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Plant species diversity and management of temperate forage and grazing land ecosystems by Sanderson, M.A, Skinner, R.H, Barker, D.J, Edwards, G.R, Tracy, B.F, Wedin, D.A

“…More than a century since Charles Darwin stated that diverse grasslands produce more herbage than monocultures, scientists still debate the relationship…”
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Carbon isotope dynamics during grass decomposition and soil organic matter formation by Wedin, David A., Tieszen, Larry L., Dewey, Bradley, Pastor, John

“…We analyzed changes in the stable C isotope composition (@?^1^3C) of bulk tissues and lignin fractions during a 2-yr decomposition study in east-central…”
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Assessment of Soil Moisture Dynamics of the Nebraska Sandhills Using Long-Term Measurements and a Hydrology Model by Sridhar, V, Hubbard, K. G, Wedin, D. A

“…Soil moisture, evapotranspiration, and other major water balance components were investigated for six Nebraska Sandhills locations during a 6 year period…”
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Seasonal changes in depth of water uptake for encroaching trees Juniperus virginiana and Pinus ponderosa and two dominant C₄ grasses in a semiarid grassland by Eggemeyer, Kathleen D, Awada, Tala, Harvey, F. Edwin, Wedin, David A, Zhou, Xinhua, Zanner, C. William

“…We used the natural abundance of stable isotopic ratios of hydrogen and oxygen in soil (0.05-3 m depth), plant xylem and precipitation to determine the…”
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The dependence of root system properties on root system biomass of 10 North American grassland species by Craine, J. M., Wedin, D. A., Chapin, F. S., Reich, P. B.

“…Dependence of the properties of root systems on the size of the root system may alter conclusions about differences in plant growth in different environments…”
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Fire and Vegetation Effects on Productivity and Nitrogen Cycling across a Forest-Grassland Continuum by Reich, Peter B., Peterson, David W., Wedin, David A., Wrage, Keith

“…Mixed tree-grass vegetation is important globally at ecotones between grass-lands and forests. To address uncertainties vis-a-vis productivity and nitrogen (N)…”
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Influence of nitrogen loading and species composition on the carbon balance of grasslands by Wedin, David A., Tilman, David

“…In a 12-year experimental study of nitrogen (N) deposition on Minnesota grasslands, plots dominated by native warm-season grasses shifted to low-diversity…”
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Predominance of ecophysiological controls on soil CO₂ flux in a Minnesota grassland by Craine, Joseph M., Wedin, David A., Chapin, F. Stuart

“…Ecosystem studies often study soil CO₂ flux as a function of environmental factors, such as temperature, that affect respiration rates by changing the rate of…”
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Relationship between the structure of root systems and resource use for 11 North American grassland plants by Craine, J.M, Wedin, D.A, Chapin, F.S. III, Reich, P.B

“…Eleven Midwest North American grassland plant species differed in theirconstruction, production, and placement of fine and coarse belowground biomassin the…”
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Species Effects on Nitrogen Cycling: A Test with Perennial Grasses by Wedin, David A., Tilman, David

“…To test for differing effects of plant species on nitrogen dynamics, we planted monocultures of five perennial grasses (Agropyron repens, Agrostis scabra, Poa…”
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Nitrogen mineralization dynamics in grass monocultures by Wedin, D.A. (Minnesota Univ., Duluth (USA). Natural Resources Research Inst.), Pastor, J

“…Although Wedin and Tilman (1990) observed large differences in in situ N mineralization among monocultures of five grass species, the mechanisms responsible…”
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CLUES TO THE MEDIEVAL DESTABILIZATION OF THE NEBRASKA SAND HILLS, USA, FROM ANCIENT POCKET GOPHER BURROWS by SCHMEISSER, REBECCA L, LOOPE, DAVID B, WEDIN, DAVID A

“…The Nebraska Sand Hills are a stabilized dune field in the central United States that reflect past conditions of drought. The most recent drought, known as the…”
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Long-term dynamics of pine and hardwood litter in contrasting environments: toward a global model of decomposition by Gholz, Henry L., Wedin, David A., Smitherman, Stephen M., Harmon, Mark E., Parton, William J.

“…Summary We analysed data on mass loss after five years of decomposition in the field from both fine root and leaf litters from two highly contrasting trees,…”
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Influence of Richness and Seeding Density on Invasion Resistance in Experimental Tallgrass Prairie Restorations by Nemec, Kristine T., Allen, Craig R., Helzer, Christopher J., Wedin, David A.

“…In recent years, agricultural producers and non-governmental organizations and agencies have restored thousands of hectares of cropland to grassland in the…”
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The response of soil CO2 flux to changes in atmospheric CO2, nitrogen supply and plant diversity by Craine, Joseph M., Wedin, David A., Reich, Peter B.

“…We measured soil CO2 flux over 19 sampling periods that spanned two growing seasons in a grassland Free Air Carbon dioxide Enrichment (FACE) experiment that…”
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Ecophysiology of Two Native Invasive Woody Species and Two Dominant Warm‐Season Grasses in the Semiarid Grasslands of the Nebraska Sandhills by Eggemeyer, Kathleen D., Awada, Tala, Wedin, David A., Harvey, F. Edwin, Zhou, Xinhua

“…Populations ofPinus ponderosaandJuniperus virginianaare expanding into semiarid Sandhills grasslands in Nebraska. To evaluate the physiological basis of their…”
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Soil carbon, nutrients, and mycorrhizae during conversion of dry tropical forest to grassland by Johnson, Nancy C., Wedin, David A.

“…Wildfires and alien grass invasion threaten dry tropical forests throughout Central America. Efforts to preserve and restore these forests will require a…”
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Determinants of Growing Season Soil CO2 Flux in a Minnesota Grassland by Craine, Joseph M., Wedin, David A.

“…Soil CO2 flux was measured across 947 plots at 7 experimental grassland sites at the Cedar Creek Natural History Area in order to determine the relationships…”
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