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Articles 1 - 30 of 123
Full-Text Articles in Entire DC Network
Comparison Of Boreal Ecosystem Model Sensitivity To Variability In Climate And Forest Site Parameters, Christopher S. Potter, Shusen Wang, Ned T. Nikolov, A D. Mcguire, Jane Liu, A W. King, John Kimball, Robert F. Grant, Steve Frolking, Joy S. Clein, Jing M. Chen, Jeffrey S. Amthor
Comparison Of Boreal Ecosystem Model Sensitivity To Variability In Climate And Forest Site Parameters, Christopher S. Potter, Shusen Wang, Ned T. Nikolov, A D. Mcguire, Jane Liu, A W. King, John Kimball, Robert F. Grant, Steve Frolking, Joy S. Clein, Jing M. Chen, Jeffrey S. Amthor
Earth Sciences
Ecosystem models are useful tools for evaluating environmental controls on carbon and water cycles under past or future conditions. In this paper we compare annual carbon and water fluxes from nine boreal spruce forest ecosystem models in a series of sensitivity simulations. For each comparison, a single climate driver or forest site parameter was altered in a separate sensitivity run. Driver and parameter changes were prescribed principally to be large enough to identify and isolate any major differences in model responses, while also remaining within the range of variability that the boreal forest biome may be exposed to over a …
Environmental & Architectural Phenomenology Vol. 13, No. 1, Kansas State University. Architecture Department
Environmental & Architectural Phenomenology Vol. 13, No. 1, Kansas State University. Architecture Department
Environmental & Architectural Phenomenology
No abstract provided.
New Species Of Hemiphileurus Kolbe (Coleoptera: Scarabaeidae: Dynastinae) From Mexico, Guatemala, Colombia, And Brazil, Brett C. Ratcliffe
New Species Of Hemiphileurus Kolbe (Coleoptera: Scarabaeidae: Dynastinae) From Mexico, Guatemala, Colombia, And Brazil, Brett C. Ratcliffe
University of Nebraska State Museum: Entomology Papers
The following new species of Hemiphileurus are described: H. bispinosus Ratcliffe from Brazil, H. deslislesi Ratcliffe from Colombia, H. quadridentatus Ratcliffe from Guatemala, and H. warneri Ratcliffe from Mexico. The parameres of H. rugulosus Endrödi (Venezuela and Colombia) are illustrated to enable easier identification of this species, and H. kahni Dupuis and Dechambre is redescribed and recorded from Brazil for the first time. Diagnostic illustrations of the male parameres are provided for the above taxa. A checklist for all the species in the genus is given.
Se describen las siguientes nuevas especies de Hemiphileurus: H. bispinosus Ratcliffe de Brasil, …
The Faculty Notebook, December 2001, Provost's Office
The Faculty Notebook, December 2001, Provost's Office
Faculty Notebook
The Faculty Notebook is published periodically by the Office of the Provost at Gettysburg College to bring to the attention of the campus community accomplishments and activities of academic interest. Faculty are encouraged to submit materials for consideration for publication to the Associate Provost for Faculty Development. Copies of this publication are available at the Office of the Provost.
Iowa's Non-Native Graminoids, Thomas R. Rosburg
Iowa's Non-Native Graminoids, Thomas R. Rosburg
Journal of the Iowa Academy of Science: JIAS
Iowa's non-native graminoids include 60 species of grasses and one species of bulrush. The exotic grass species comprise a large proportion (about 31%) of the total species richness of grasses in Iowa, which are second only to the Asteraceae in terms of total species. About half of the non-native graminoids (52%) occur sporadically and form sparse, non-invasive populations, while eighteen species (about 30%) are commonly encountered in large populations throughout the state. About 60% are annuals and a large majority (89%) has been introduced from either Europe or Asia. The C3 photosynthetic pathway is prevalent, occurring in approximately two-thirds of …
Purple Loosestrife: History, Management, And Biological Control In Iowa, Amy P. Wiebe, John J. Obrycki
Purple Loosestrife: History, Management, And Biological Control In Iowa, Amy P. Wiebe, John J. Obrycki
Journal of the Iowa Academy of Science: JIAS
Purple loosestrife (Lythrum salicaria) is an invasive plant species infesting wetlands in North America. Biodiversity and wetland habitat quality are reduced following purple loosestrife establishment. Several management tactics, including cultural, mechanical, and chemical controls, have had limited success in reducing the spread of purple loosestrife. Beginning in the 1990s, a biological control program has introduced several species of natural enemies from Europe that feed on purple loosestrife. Since 1994, Iowa State University has reared and released two species of beetles that feed on purple loosestrife, Galerucella calmariensis and G. pusilla. Biological control is one component of an integrated purple loosestrife …
University Of New Mexico Board Of Regents Minutes For November 13, 2001, University Of New Mexico Board Of Regents
University Of New Mexico Board Of Regents Minutes For November 13, 2001, University Of New Mexico Board Of Regents
Board of Regents Meeting Minutes
Minutes from the November 13, 2001 Board of Regents Meeting
Suisun Ecological Workgroup Final Report To The State Water Resources Control Board, Interagency Ecological Program For The Sacramento-San Joaquin Estuary
Suisun Ecological Workgroup Final Report To The State Water Resources Control Board, Interagency Ecological Program For The Sacramento-San Joaquin Estuary
California Agencies
No abstract provided.
Ice Age Floods In The Spokane And Cheney Area, Washington, Eugene P. Kiver, Dale F. Stradling
Ice Age Floods In The Spokane And Cheney Area, Washington, Eugene P. Kiver, Dale F. Stradling
Cheney-Palouse Chapter Records
This booklet provides directions for a driving tour featuring evidence for Ice Age floods in Spokane County. The route extends from Interstate 90 along the north to Williams Lake Road to the south.
The booklet was created for the seventh field trip sponsored by the Cheney-Palouse Chapter of the Ice Age Flood Institute.
The George-Anne, Georgia Southern University
The George-Anne, Georgia Southern University
The George-Anne
- U.S. Attacks Taliban, Al'Qaeda Strongholds
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Fall 2001, Seattle University
Forested Wetlands Of The Southern United States: A Bibliography, William Conner, Nicole L. Hill, Evander M. Whitehead, William S. Busbee, Marceau A. Ratard, Mehmet Ozalp, Darrell L. Smith, James P. Marshall
Forested Wetlands Of The Southern United States: A Bibliography, William Conner, Nicole L. Hill, Evander M. Whitehead, William S. Busbee, Marceau A. Ratard, Mehmet Ozalp, Darrell L. Smith, James P. Marshall
Publications
The term forested wetland covers a variety of forest types including mangroves, cypress/tupelo swamps, bottomland hardwoods, pocosins and Carolina bays, flatwoods, and mountain fens. These forests are dominated by woody species that have morphological features, physiological adaptations, and/or reproductive strategies enabling them to achieve maturity and reproduce in an environment where the soils within the rooting zone may be inundated or saturated for various periods during the growing season. Although alluvial floodplains occur along most streams of the United States, they are most extensive in the Atlantic Coastal Plain, Gulf Coastal Plain, and Mississippi Alluvial Plain. Only about half of …
Winter Severity And Wolf Predation On A Formerly Wolf-Free Elk Herd, L. David Mech, Douglas W. Smith, Kerry M. Murphy, Daniel R. Macnulty
Winter Severity And Wolf Predation On A Formerly Wolf-Free Elk Herd, L. David Mech, Douglas W. Smith, Kerry M. Murphy, Daniel R. Macnulty
USGS Northern Prairie Wildlife Research Center
We studied wolf (Canis lupus) predation on elk (Cervus elaphus) in Yellowstone National Park from 17 March to 15 April 1997 (severe winter conditions) and from 2 to 31 March 1998 (mild winter conditions) 2-3 years after wolves were reintroduced to the park. Elk composed 91% of 117 kills. Data comparisons for 1997 versus 1998 were: hunting success rate, 26% versus 15%; kill rate, 17.1 kg/wolf/day versus 6.1; percent of kill consumed in first day, 7 versus 86; percent femur marrow fat of adult kills, 27 versus 70; calf:adult ratios of kills, 2:33 versus 17:23; sex …
Abundance And Habitat Associations Of Birds Wintering In The Platte River Valley, Nebraska, Craig Davis
Abundance And Habitat Associations Of Birds Wintering In The Platte River Valley, Nebraska, Craig Davis
Great Plains Research: A Journal of Natural and Social Sciences
The abundance and habitat associations of overwintering birds in Platte River Valley of central Nebraska may influence their long-term survival. I observed a total of 51 species over a three-year period in shrub-grassland, forest, grassland, and cropland habitats during the winter. Grassland habitats had the lowest abundance of wintering birds, while abundances in shrub-grassland, forest, and cropland habitats were higher and similar. Species richness was highest in forests ( x= 2.97 species) and lowest in grasslands (x = 0.73 species) and croplands (x = 0.57 species). Overall, horned larks (Eremophila alpestris), American tree sparrows (Spizella arborea), …
Habitat Fragmentation Effects On Birds In Grasslands And Wetlands: A Critique Of Our Knowledge, Douglas Johnson
Habitat Fragmentation Effects On Birds In Grasslands And Wetlands: A Critique Of Our Knowledge, Douglas Johnson
Great Plains Research: A Journal of Natural and Social Sciences
Habitat fragmentation exacerbates the problem of habitat loss for grassland and wetland birds. Remaining patches of grasslands and wetlands may be too small, too isolated, and too influenced by edge effects to maintain viable populations of some breeding birds. Knowledge of the effects of fragmentation on bird populations is critically important for decisions about reserve design, grassland and wetland management, and implementation of cropland set-aside programs that benefit wildlife. In my review of research that has been conducted on habitat fragmentation, I found at least five common problems in the methodology used. The results of many studies are compromised by …
Review Of Standard Soil Methods For Long-Term Ecological Research Edited By G. Philip Robertson, David E. Coleman, Caroline S. Bledsoe, And Phillip Sollins, Mary Ann Vinton
Great Plains Research: A Journal of Natural and Social Sciences
Standard Soil Methods for Long-Term Ecological Research is the second in a series of books dedicated to summarizing the research results and methods of ecological studies being conducted at sites around North America and Antarctica under the sponsorship of the National Science Foundation's Long-Term Ecological Research (LTER) program. The twenty-one sites range from arctic tundra to hot desert and from natural tropical rainforest to urban and suburban areas.
The Role Of Predation In Wildlife Population Dynamics, Eric M. Gese, Frederick F. Knowlton
The Role Of Predation In Wildlife Population Dynamics, Eric M. Gese, Frederick F. Knowlton
USDA Wildlife Services: Staff Publications
The role predation plays in the dynamics of prey populations is controversial. Our understandings of predator-prey relationships is complicated by a multitude of factors in the environment and a general lack of knowledge of most ecological systems. Various other factors, besides predation, may regulate or limit prey populations, and various factors influence the degree to which predation affects prey populations. Furthermore, some factors may create time lags, or even cause generational effects, that go unnoticed. Herein, we review the role of predation in wildlife population dynamics, some of the factors influencing predator-prey interactions, and attempt to indicate where the professional …
Tcwp Newsletter No. 241, Tennessee Citizens For Wilderness Planning
Tcwp Newsletter No. 241, Tennessee Citizens For Wilderness Planning
Tennessee Citizens for Wilderness Planning Newsletters
No abstract provided.
Evolving Presidential Policy Toward Livestock Grazing In National Monuments, Andy Kerr, Mark Salvo
Evolving Presidential Policy Toward Livestock Grazing In National Monuments, Andy Kerr, Mark Salvo
Penn State Environmental Law Review
No abstract provided.
Evolving Presidential Policy Toward Livestock Grazing In National Monuments, Andy Kerr, Mark Salvo
Evolving Presidential Policy Toward Livestock Grazing In National Monuments, Andy Kerr, Mark Salvo
Penn State Environmental Law Review
No abstract provided.
2001 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
2001 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
Grizzly Football Yearbook, 1939-2018
Annual yearbook of the University of Montana’s Athletics Department. This volume covers the period from fall 2001 through spring 2002.
Mapping And Monitoring Of Coral Communities And Their Spatial Patterns Using A Surface-Based Video Method From A Vessel, Bernhard Riegl, Jan L. Korrubel, Charles Martin
Mapping And Monitoring Of Coral Communities And Their Spatial Patterns Using A Surface-Based Video Method From A Vessel, Bernhard Riegl, Jan L. Korrubel, Charles Martin
Marine & Environmental Sciences Faculty Articles
No Abstract Provided.
Degradation Of Reef Structure, Coral And Fish Communities In The Red Sea By Ship Groundings And Dynamite Fisheries, Bernhard Riegl
Degradation Of Reef Structure, Coral And Fish Communities In The Red Sea By Ship Groundings And Dynamite Fisheries, Bernhard Riegl
Marine & Environmental Sciences Faculty Articles
Reef degradation was investigated on 66 Egyptian Red Sea reefs—60 reefs for dynamite damage (using line transects) and six ship grounding sites (using 1 m sample squares). Ship groundings and dynamite fishing caused similar damage, reduction of the reef to rubble (65% of reefs were dynamited, mostly leeward, 58%). Changes in coral (line transect study) and fish communities (point count study) in impacted sites were documented. On impacted reefs, coral cover decreased, bare substratum and rubble increased, and fish dominance shifted away from Pomacentridae. Oceanographic conditions result in a stable pattern of coral communities (windward Acropora, leeward Porites). …
Spatial And Temporal Variability In Nest Success Of Snail Kites In Florida : A Meta-Analysis, Victoria J. Dreitz, Robert E. Bennetts, Brian Toland, Wiley M. Kitchens, Michael W. Collopy
Spatial And Temporal Variability In Nest Success Of Snail Kites In Florida : A Meta-Analysis, Victoria J. Dreitz, Robert E. Bennetts, Brian Toland, Wiley M. Kitchens, Michael W. Collopy
Wildlife Biology Faculty Publications
Nesting success of Snail Kites (Rostrhamus sociabilis) in Florida is highly variable among years and locations, and hydrology is the most frequently reported explanatory factor. We conducted a meta-analysis to evaluate the extent of spatial and temporal variability in nesting success, and explicitly tested for the effects of annual minimum water levels. Data were obtained from six independent studies spanning 22 years and 11 wetlands. Our results indicated there was substantial spatial and temporal variability in nest success and that annual minimum water level, either as a categorical or continuous response, was not a significant source of this …
Low-Income Homeownership In Portland's Albina Community: A Comparative Analysis Of Housing Quality In Market-Rate And Subsidized Houses, Carolyn Emily Collopy
Low-Income Homeownership In Portland's Albina Community: A Comparative Analysis Of Housing Quality In Market-Rate And Subsidized Houses, Carolyn Emily Collopy
Dissertations and Theses
Housing embodies much more than just a physical commodity. In addition to being an investment, it is our shelter, right to privacy, connection to community, and access to recreation and necessities. Homeownership has long been hailed by social and housing advocates as an economic stabilizer for low to moderate-income neighborhoods. For low and moderate-income residents (households earning 50-100% of the median income), homeownership is possible in two forms: affordable market-rate housing created by the filtering down of houses until affordable to low and moderate-income households, or through subsidized homeownership programs which develop new housing and offer financial assistance for low …
Canadian Cooperative Wildlife Health Centre, Volume 8-1, Summer 2001
Canadian Cooperative Wildlife Health Centre, Volume 8-1, Summer 2001
Canadian Cooperative Wildlife Health Centre: Newsletters and Publications
Raptor Carcasses Needed for Assessment of Lead Exposure: CWS and CCWHC cooperative project Radio-telemetry for Detecting and Understanding Disease Update on West Nile Virus in North AmericaFrench heartworm in red fox and domestic dogs in Newfoundland Raccoon Rabies Reaches New Brunswick Neurological Disease in Moose in Nova Scotia Brain Abscesses in White-tailed Deer Suspected predation by ravens on nesting painted turtles Marine Mammals in British Columbia Chronic Wasting Disease in free-ranging mule-deer in Saskatchewan
Abstracts Of Papers, 79th Annual Meeting Of The Virginia Academy Of Science, May 22-25, 2001, James Madison University, Harrisonburg, Virginia
Virginia Journal of Science
Abstracts of papers that were presented at the 79th Annual Meeting of the Virginia Academy of Science, May 22-25, 2001, James Madison University, Harrisonburg, Virginia.
The Physiology Of Life History Trade-Offs In Animals, Anthony J. Zera, Lawrence G. Harshman
The Physiology Of Life History Trade-Offs In Animals, Anthony J. Zera, Lawrence G. Harshman
Anthony Zera Publications
The functional causes of life history trade-offs have been a topic of interest to evolutionary biologists for over six decades. Our review of life history trade-offs discusses conceptual issues associated with physiological aspects of trade-offs, and it describes recent advances on this topic. We focus on studies of four model systems: wing polymorphic insects, Drosophila, lizards, and birds. The most significant recent advances have been: (a) incorporation of genetics in physiological studies of trade-offs, (b) integration of investigations of nutrient input with nutrient allocation, (c) development of more sophisticated models of resource acquisition and allocation, (d) a shift to more …
Ecophysiology Of Schinus Terebinthifolius Contrasted With Native Species In Two South Florida Ecosystems, Sharon Ewe
Ecophysiology Of Schinus Terebinthifolius Contrasted With Native Species In Two South Florida Ecosystems, Sharon Ewe
SERC Dissertations & Theses (Working copies)
No abstract provided.
Invasion Genetics Of New World Medflies: Testing Alternative Colonization Scenarios, Andrew J. Bohonak, Neil Davies, Francis X. Villablanca, George K. Roderick
Invasion Genetics Of New World Medflies: Testing Alternative Colonization Scenarios, Andrew J. Bohonak, Neil Davies, Francis X. Villablanca, George K. Roderick
Biological Sciences
The Mediterranean fruit fly (Ceratitis capitata) is an invasive agricultural pest with a wide host range and a nearly global distribution. Efforts to forgo the medfly''s spread into the United States are dependent on an understanding of population dynamics in newly established populations elsewhere. To explore the potential influence of demographic and historical parameters in six medfly populations distributed from Mexico to Peru, we created population genetic null models using Monte Carlo simulations. Null expectations for genetic differentiation (F ST) were compared with actual sequence variation from four highly polymorphic nuclear loci. Four colonization scenarios that …