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Articles 1 - 10 of 10
Full-Text Articles in Life Sciences
Interlink Between Biological Diversity And Climate Change: Advice On The Integration Of Biodiversity Considerations Into The Implementation Of The United Nations Framework Convention On Climate Change And Its Kyoto Protocol
USDA Forest Service / UNL Faculty Publications
Biological diversity includes all plants, animals, microorganisms, the ecosystems of which they are part, and the diversity within species, between species, and of ecosystems. No single component of biodiversity (i.e., genes, species or ecosystems) is consistently a good indicator of the overall biodiversity as these components can vary independently. Functional diversity describes the variety of ecological functions of species or groups of species in an ecosystem. It is a biodiversity descriptor that provides an alternative way of understanding biological diversity, and the effects of disturbances caused by human activities, including climate change, on ecosystems.
Remote Sensing Estimates Of Boreal And Temperate Forest Woody Biomass: Carbon Pools, Sources, And Sinks, Jiarui Dong, Robert K. Kaufmann, Ranga B. Myneni, Compton J. Tucker, Pekka E. Kauppi, Jari Liski, Wolfgang Buermann, V. Alexeyev, Malcolm K. Hughes
Remote Sensing Estimates Of Boreal And Temperate Forest Woody Biomass: Carbon Pools, Sources, And Sinks, Jiarui Dong, Robert K. Kaufmann, Ranga B. Myneni, Compton J. Tucker, Pekka E. Kauppi, Jari Liski, Wolfgang Buermann, V. Alexeyev, Malcolm K. Hughes
USDA Forest Service / UNL Faculty Publications
The relation between satellite measurements of the normalized difference vegetation index (NDVI), cumulated over the growing season, and inventory estimates of forest woody biomass carbon is estimated statistically with data from 167 provinces and states in six countries (Canada, Finland, Norway, Russia and the USA for a single time period and Sweden for two periods). Statistical tests indicate that the regression model can be used to represent the relation between forest biomass and NDVI across spatial, temporal and ecological scales for relatively long time scales. For the 1.42 billion ha of boreal and temperate forests in the Northern Hemisphere, the …
Alteration Of Soil Water Content Consequent To Root-Pruning At A Windbreak/Crop Interface In Nebraska, Usa, Qingjiang Hou, James R. Brandle, Kenneth Hubbard, Michele Schoneberger, Carlos Nieto, Charles A. Francis
Alteration Of Soil Water Content Consequent To Root-Pruning At A Windbreak/Crop Interface In Nebraska, Usa, Qingjiang Hou, James R. Brandle, Kenneth Hubbard, Michele Schoneberger, Carlos Nieto, Charles A. Francis
USDA Forest Service / UNL Faculty Publications
Root-pruning is generally recommended as an appropriate treatment to reduce competition for soil water and/or nutrients and suppression of crop yield in areas adjacent to windbreaks. Several recent studies suggest, however, that factors other than soil water might be causing yield reduction at the interface. For two consecutive years, we evaluated root-pruning effects on soil water at the windbreak/crop interface under both cropped (soybean [Glycine max (L) Merr.] variety ‘Iroquois’, 1997) and non-cropped (1998) conditions in Mead, Nebraska, USA. Volumetric soil water content near the windbreaks was systematically measured at various soil depths, distances from the windbreak, …
Remote Sensing Estimates Of Boreal And Temperate Forest Woody Biomass: Carbon Pools, Sources, And Sinks, Jiarui Dong, Robert Kaufmann, Ranga Myneni, Compton Tucker, Pekka Kauppi, Jari Liski, Wolfgang Buermann, V. Alexeyev, Malcolm Hughs
Remote Sensing Estimates Of Boreal And Temperate Forest Woody Biomass: Carbon Pools, Sources, And Sinks, Jiarui Dong, Robert Kaufmann, Ranga Myneni, Compton Tucker, Pekka Kauppi, Jari Liski, Wolfgang Buermann, V. Alexeyev, Malcolm Hughs
USDA Forest Service / UNL Faculty Publications
The relation between satellite measurements of the normalized difference vegetation index (NDVI), cumulated over the growing season, and inventory estimates of forest woody biomass carbon is estimated statistically with data from 167 provinces and states in six countries (Canada, Finland, Norway, Russia and the USA for a single time period and Sweden for two periods). Statistical tests indicate that the regression model can be used to represent the relation between forest biomass and NDVI across spatial, temporal and ecological scales for relatively long time scales. For the 1.42 billion ha of boreal and temperate forests in the Northern Hemisphere, the …
Use Of Mini-Sprinklers To Strip Trichloroethylene And Tetrachloroethylene From Contaminated Ground Water, Yvette C. Berisford, Parshall B. Bush, John I. Blake, Cassandra L. Bayer
Use Of Mini-Sprinklers To Strip Trichloroethylene And Tetrachloroethylene From Contaminated Ground Water, Yvette C. Berisford, Parshall B. Bush, John I. Blake, Cassandra L. Bayer
USDA Forest Service / UNL Faculty Publications
Three low-volume mini-sprinklers were tested for their efficacy to strip trichloroethylene (TCE) and tetrachloroethylene (PCE) from water. Deionized water spiked with TCE and PCE as pumped for approximately 1 h at 0.19 to 0.21 MPa (28 to 30 lb in-2) through a mini-sprinkler supported on top of a 1.8-m-tall riser. Water was collected in collection vessels at 0.61 and 1.22 m above the ground on support columns that were spaced at 0.61-m intervals from the riser base, and samples were composited per height and distance from the riser. Overall, air-stripping reduced dissolved concentrations of TCE and PCE by …
First Report Of The North Dakota Rare Bird Committee, Dan Svingen, Ron E. Martin
First Report Of The North Dakota Rare Bird Committee, Dan Svingen, Ron E. Martin
USDA Forest Service / UNL Faculty Publications
The status, distribution, and abundance of North Dakota's bird life was summarized several times during the twentieth century (e.g., Wood 1923, Bailey 1926, Stewart 1971, Stewart 1975). The most recent official North Dakota state bird list was Faanes and Stewart (1982). The state's avifauna has changed markedly since that list was published. In an attempt to document some of those changes, the North Dakota Natural Science Society formed the North Dakota Ornithological Records Committee in 1979. That committee's goals were to evaluate and archive documentations of rare bird sighting and to periodically revise the official state bird list. Herein we …
Biology And Biological Control Of Yellow Starthistle, Linda M. Wilson, Cynthia Jette, John Connett, Joseph Mcaffrey
Biology And Biological Control Of Yellow Starthistle, Linda M. Wilson, Cynthia Jette, John Connett, Joseph Mcaffrey
USDA Forest Service / UNL Faculty Publications
Yellow starthistle (Centaurea solstitialis L.) is an invasive weed introduced from the Mediterranean region. It predominantly infests rangelands in the western United States. This second edition manual on the biological control of yellow starthistle is intended to give weed and land managers guidelines to develop and successfully establish a starthistle biocontrol program.
N-Glycan Structures Of Human Transferrin Produced By Lymantria Dispar (Gypsy Moth) Cells Using The Ldmnpv Expression System, One Choi, Noboru Tomiya, Jung H. Kim, James M. Slavicek, Michael J. Betenbaugh, Yuan C. Lee
N-Glycan Structures Of Human Transferrin Produced By Lymantria Dispar (Gypsy Moth) Cells Using The Ldmnpv Expression System, One Choi, Noboru Tomiya, Jung H. Kim, James M. Slavicek, Michael J. Betenbaugh, Yuan C. Lee
USDA Forest Service / UNL Faculty Publications
N-glycan structures of recombinant human serum transferrin (hTf) expressed by Lymantria dispar (gypsy moth) 652Y cells were determined. The gene encoding hTf was incorporated into a Lymantria dispar nucleopolyhedrovirus (LdMNPV) under the control of the polyhedrin promoter. This virus was then used to infect Ld652Y cells, and the recombinant protein was harvested at 120 h postinfection. N-glycans were released from the purified recombinant human serum transferrin and derivatized with 2-aminopyridine; the glycan structures were analyzed by a two-dimensional HPLC and MALDI-TOF MS. Structures of 11 glycans (88.8% of total N-glycans) were elucidated. The glycan analysis revealed that …
Factors Related To Body Condition Of Nestling Burrowing Owls In Buffalo Gap National Grassland, South Dakota, Randall L. Griebel, Julie A. Savidge
Factors Related To Body Condition Of Nestling Burrowing Owls In Buffalo Gap National Grassland, South Dakota, Randall L. Griebel, Julie A. Savidge
USDA Forest Service / UNL Faculty Publications
We analyzed the body condition of nestling Burrowing Owls (Athene cunicularia) at Buffalo Gap National Grassland during the summers of 1999 and 2000. In 1999, which had a wet spring, body condition was negatively related to brood size and distance from nest to colony edge. There was no relationship between body condition and brood size during 2000, which had normal precipitation. In 2000, nestlings of early arriving pairs were in better body condition than those that arrived later. The variance in body condition within a brood was not related to brood size.
Planning For Population Viability On Northern Great Plains National Grasslands, Fred B. Samson, Fritz L. Knopf, Clinton W. Mccarthy, Barry R. Noon, Wayne R. Ostile, Susan M. Rinehart, Scott Larson, Glenn E. Plumb, Gregory L. Schenbeck, Daniel N. Svingen, Timothy W. Byer
Planning For Population Viability On Northern Great Plains National Grasslands, Fred B. Samson, Fritz L. Knopf, Clinton W. Mccarthy, Barry R. Noon, Wayne R. Ostile, Susan M. Rinehart, Scott Larson, Glenn E. Plumb, Gregory L. Schenbeck, Daniel N. Svingen, Timothy W. Byer
USDA Forest Service / UNL Faculty Publications
Broad-scale information in concert with conservation of individual species must be used to develop conservation priorities and a more integrated ecosystem protection strategy. In 1999 the United States Forest Service initiated an approach for the 1.2 x 106 ha of national grasslands in the Northern Great Plains to fulfill the requirement to maintain viable populations of all native and desirable introduced vertebrate and plant species. The challenge was threefold: 1) develop basic building blocks in the conservation planning approach, 2) apply the approach to national grasslands, and 3) overcome differences that may exist in agency-specific legal and policy requirements. Key …