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Photosynthetic Performance Of Invasive Pinus Ponderosa And Juniperus Virginiana Seedlings Under Gradual Soil Water Depletion, Saadia Bihmidine, N. M. Bryan, K. R. Payne, M. R. Parde, Jane A. Okalebo, Sharon E. Cooperstein, Tala Awada
Photosynthetic Performance Of Invasive Pinus Ponderosa And Juniperus Virginiana Seedlings Under Gradual Soil Water Depletion, Saadia Bihmidine, N. M. Bryan, K. R. Payne, M. R. Parde, Jane A. Okalebo, Sharon E. Cooperstein, Tala Awada
School of Natural Resources: Faculty Publications
Changes in climate, land management and fire regime have contributed to woody species expansion into grasslands and savannas worldwide. In the USA, Pinus ponderosa P. & C. Lawson and Juniperus virginiana L. are expanding into semiarid grasslands of Nebraska and other regions of the Great Plains. We examined P. ponderosa and J. virginiana seedling response to soil water content, one of the most important limiting factors in semiarid grasslands, to provide insight into their success in the region. Photosynthesis, stomatal conductance, maximum photochemical efficiency of PSII, maximum carboxylation velocity, maximum rate of electron transport, stomatal limitation to photosynthesis, water potential, …
Celebrating Darwin's Legacy: Evolution In The Galapagos Islands And The Great Plains, Paul A. Johnsgard
Celebrating Darwin's Legacy: Evolution In The Galapagos Islands And The Great Plains, Paul A. Johnsgard
Papers in Ornithology
An exhibition of photographs by Linda R. Brown, Josef Kren, Paul A. Johnsgard, Allison Johnson, and Stephen Johnson; paintings by Allison Johnson; drawings by Paul A. Johnsgard; and related Darwiniana. Sponsored by the Center for Great Plains Studies, James Stubbendieck, director, and the Great Plains Art Museum, Amber Mohr, curator, in honor of the bicentennial of Charles Darwin's birth (1809-2009) and the 150th anniversary of The Origin of Species (1859).
EXHlBlTORS
Linda R. Brown, Lincoln, Nebraska. B.S. (Pharmacy) University of Nebraska-Lincoln, Lincoln, NE, 1965.
Paul A. Johnsgard, Lincoln, Nebraska. Foundation Professor Emeritus, University of Nebraska-Lincoln. B.S. (Zoology) North Dakota State …
Birds Of The Great Plains: Appendix B -- Abundance And Breeding Status Of Birds At Selected Parks And Refuges In The Great Plains, Paul A. Johnsgard
Birds Of The Great Plains: Appendix B -- Abundance And Breeding Status Of Birds At Selected Parks And Refuges In The Great Plains, Paul A. Johnsgard
Birds of the Great Plains (Revised Edition, 2009) by Paul Johnsgard
A 14-page table including wildlife refuges in the states of North Dakota (7), Minnesota (3), South Dakota (5), Nebraska (4), Kansas (4), Missouri (1), Oklahoma (4), and Texas (2).
Seasonal Changes In Depth Of Water Uptake For Encroaching Trees Juniperus Virginiana And Pinus Ponderosa And Two Dominant C4 Grasses In A Semiarid Grassland, Kathleen D. Eggemeyer, Tala Awada, F. Edwin Harvey, David A. Wedin, Xinhua Zhou, C. William Zanner
Seasonal Changes In Depth Of Water Uptake For Encroaching Trees Juniperus Virginiana And Pinus Ponderosa And Two Dominant C4 Grasses In A Semiarid Grassland, Kathleen D. Eggemeyer, Tala Awada, F. Edwin Harvey, David A. Wedin, Xinhua Zhou, C. William Zanner
School of Natural Resources: Faculty Publications
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 seasonal changes in sources of soil water uptake by two native encroaching woody species (Pinus ponderosa P. & C. Lawson, Juniperus virginiana L.), and two C4 grasses (Schizachyrium scoparium (Michx.) Nash, Panicum virgatum L.), in the semiarid Sandhills grasslands of Nebraska. Grass species extracted most of their water from the upper soil profile (0.05–0.5 m). Soil water uptake from below 0.5 m depth increased under drought, but appeared to be minimal in …
Near-Surface Soil-Water Monitoring For Water Resources Management On A Wide-Area Basis In The Great Plains, K. G. Hubbard, J. You, V. Sridhar, E. Hunt, S. Korner, G. Roebke
Near-Surface Soil-Water Monitoring For Water Resources Management On A Wide-Area Basis In The Great Plains, K. G. Hubbard, J. You, V. Sridhar, E. Hunt, S. Korner, G. Roebke
Great Plains Research: A Journal of Natural and Social Sciences
In the Great Plains, soil water is one of the most critical factors related to sustainable production on cropland and rangeland, while the need for better water management grows in the face of increasing water demand during dry years. Soil water is also an important factor related to flood modeling and quantification of the boundary conditions in atmospheric models such as global circulation models. The objectives of this study were to install a wide-area automated soil-monitoring network, determine effective calibration procedures, and develop new products to illustrate the status of soil water. Soil-monitoring sensors were established at 51 sites across …
Spatial And Temporal Effects On Switchgrass Stands And Yield In The Great Plains, Marty R. Schmer, R. B. Mitchell, K. P. Vogel, Walter H. Schacht, David B. Marx
Spatial And Temporal Effects On Switchgrass Stands And Yield In The Great Plains, Marty R. Schmer, R. B. Mitchell, K. P. Vogel, Walter H. Schacht, David B. Marx
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Switchgrass (Panicum virgatum L.) is being developed into a perennial, herbaceous, cellulosic feedstock crop for use in temperate regions of the USA. Information on spatial and temporal variation for stands and biomass yield among and within fields in large agroecoregions is not available. Spatial and temporal variation information is needed to model feedstock availability for biorefineries. In this 5-yr study, the spatial and temporal variation for biomass yield and stands was determined among and within 10 fields located in North Dakota, South Dakota, and Nebraska. Switchgrass fields were managed for bioenergy from 2000 to 2004 for the Nebraska locations …
The Impact Of Military Forts On Agricultural Investments On The Great Plains In 1880, Christopher S. Decker, David T. Flynn
The Impact Of Military Forts On Agricultural Investments On The Great Plains In 1880, Christopher S. Decker, David T. Flynn
Center for Great Plains Studies: Staff and Fellows Publications
We empirically investigate the relationship between agricultural development and proximity to military forts in Kansas, Nebraska, and Colorado in 1880. Agricultural investments are substantially higher in counties where a military fort is present, suggesting that military forts stimulated agricultural development on the Great Plains. However, the reverse is not true; there is no statistical support for the notion that forts necessarily located in counties where substantial development was already occurring. Moreover, we found that while the presence of a military fort has the effect of increasing agricultural development, there is no evidence that such a presence sustained agricultural development.
Recent Occurrence Of An American Black Bear In Nebraska, Justin D. Hoffman, Sam Wilson, Hugh H. Genoways
Recent Occurrence Of An American Black Bear In Nebraska, Justin D. Hoffman, Sam Wilson, Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
We report on a young male, cinnamon-phase American black bear (Ursus americanus) that was collected in northwestern Nebraska on May 12, 2008. This specimen represents the first black bear taken in Nebraska since 1907. Cranial characteristics and mass of the individual indicated a 15–16-month old bear. This bear may have dispersed from the Laramie Mountains in southeastern Wyoming along the North Platte River into western Nebraska. This record adds to the growing number of cases where large carnivores are reinvading previously occupied territory in the Great Plains. These reinvasions potentially have broad ecological implications to local prey populations …