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Articles 4321 - 4350 of 5034
Full-Text Articles in Ecology and Evolutionary Biology
Responses Of Sphagnum And Carex Peatlands To Ultraviolet-B Radiation, And A Meta-Analysis Of Uv-B Effects On Vascular Plants, Peter S. Searles
Responses Of Sphagnum And Carex Peatlands To Ultraviolet-B Radiation, And A Meta-Analysis Of Uv-B Effects On Vascular Plants, Peter S. Searles
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The severity of stratospheric ozone depletion in the temperate and polar latitudes has raised concerns about the sensitivity of terrestrial vegetation and ecosystems to solar ultraviolet (UV-B) radiation. This dissertation examined the responses of plants and microbes to solar UV-B for 3 years in Tierra del Fuego, Argentina (55° S). This region is under the influence of the Antarctic "ozone hole" during the austral spring. Additionally, a quantitative review of the UV-B literature was conducted using a set of statistical techniques known as meta-analysis.
For the field studies in Tierra del Fuego, plots were established in a Sphagnum moss peatland …
The Prairie Naturalist Volume 32, No.2 June 2000
The Prairie Naturalist Volume 32, No.2 June 2000
The Prairie Naturalist
EVALUATING MORNING AND AFTERNOON ELECTROFISHING CATCH RATES FOR LARGEMOUTH BASS IN KANSAS LAKES C. A. Cox, and R. D. Schultz
DYNAMICS OF GREEN ASH WOODLANDS IN THEODORE ROOSEVELT NATIONAL PARK ▪ L. R. Irby, J. E. Norland, M. G. Sullivan, J. A. Westfall, Jr., and P. Anderson
STATUS OF THE ARKANSAS DARTER IN SOUTH-CENTRAL KANSAS AND ADJACENT OKLAHOMA ▪ M. E. Eberle, and W J. Stark
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA 1999 R. N. Randall
AN OBSERVATION OF POSSIBLE BROOD ADOPTION IN RUDDY DUCKS ▪ J. T. Pelayo
MAXILLARY CANINE TEETH IN A NORTH DAKOTA DEER ▪ W. F. …
Spring 2000, Nsu Oceanographic Center
The Prairie Naturalist Volume 32, No.1 March 2000
The Prairie Naturalist Volume 32, No.1 March 2000
The Prairie Naturalist
FRESHWATER MUSSELS (BIVALVIA: UNIONOIDEA) IN STREAMS OF NORTHWESTERN KANSAS ▪ S. M. Bergman, M. E. Eberle, and B. K. Obenneyer
PISCIVOROUS BIRD DEPREDATION AT NORTHERN MINNESOTA AQUACULTURE FACILITIES ▪ G. K. Bridgman, E. H. Rave, and J. M. Rafferty 17
EFFECTS OF MOWED TRAILS ON DEPREDATION OF ARTIFICIAL NESTS IN GRASSLAND ▪ D. J. Rosenblatt, J. J. Newton, and E . J. Heske
PLANT COMMUNITY PATTERNS ON UPLAND PRAIRIE IN THE EASTERN NEBRASKA SANDHILLS ▪ W. H. Schacht, J. D. Volesky, D. Bauer, A. J. Smart, and E. M. Mousel
AMERICAN BITTERN DEPREDATES SORA ▪ J. E. Austin, and M. …
Selenium Poisoning Of Wildlife And Western Agriculture: Cause And Effect, N. E. Korte
Selenium Poisoning Of Wildlife And Western Agriculture: Cause And Effect, N. E. Korte
All U.S. Government Documents (Utah Regional Depository)
This project examined the hypothesis that selenium contamination is not the principal cause of the decline of endemic fish species in the Upper Colorado Basin. Activities employed to test this hypothesis included a reconnaissance of locations altered by recent road construction, a reinterpretation of available literature regarding selenium toxicity, and the interpretation of unpublished data obtained from the Upper Colorado Basin Fish Recovery Program. The project demonstrates that most of the evidence implicating selenium is circumstantial. Specifically, this research demonstrates that neither the historical record nor the technical literature consistently supports the emphasis given selenium toxicity. For example, many locations …
Land Use Patterns In Relation To Lake Water Quality In The Lake Wesserunsett Watershed, Problems In Environmental Science Course (Biology 493), Colby College, Colby Environmental Assessment Team, Colby College
Land Use Patterns In Relation To Lake Water Quality In The Lake Wesserunsett Watershed, Problems In Environmental Science Course (Biology 493), Colby College, Colby Environmental Assessment Team, Colby College
Colby College Watershed Study: Other Area Studies
The Colby Environmental Assessment Team (CEAT) engaged in an extensive data collection and analysis effort from September to December of 2000 to produce a comprehensive evaluation of the ecological health of the Lake Wesserunsett ecosystem. CEAT examined several factors related to lake water quality, including land use within the watershed, the impacts of residential and commercial development, and physical and chemical measurements of the lake itself. Lake water quality was the primary focus of the study due to its predictive value regarding overall watershed function and viability. The accumulation of nutrients in a lake due to surface runoff and erosion …
Breeding Season Demography And Movements Of Eastern Towhees At The Savannah River Site, South Carolina, David G. Krementz, Larkin A. Powell
Breeding Season Demography And Movements Of Eastern Towhees At The Savannah River Site, South Carolina, David G. Krementz, Larkin A. Powell
School of Natural Resources: Faculty Publications
The Eastern Towhee (Pipilo erythrophthalmus) has undergone population declines across much of its range, especially in New England. Despite being a widespread and, at one time, a common species, relatively little is known about its natural history, ecology, or demographics. We conducted baseline research on Eastern Towhees at the Savannah River Site, South Carolina, in 1995 and 1996 to estimate breeding season survival rates, nest success rates, breeding densities, and daily movements. We also were interested in whether towhees had differences in survival and movement rates between young and mature managed pine stands. We found that survival rates during the …
The Relationship Of Animal Protection Interests To Animal Damage Management: Historic Paths, Contemporary Concerns And The Uncertain Future, John Hadidian
Conservation Biology and Animal Welfare Collection
More than a decade ago Schmidt (1989) called for consideration of animal welfare to become a "firstorder" decision rule in wildlife management concerns, including animal damage control. Although there has been movement in that direction, this clearly has not yet come to pass. This paper takes a brief look at the interests we call animal damage management, animal welfare and protection, animal rights, and environmentalism in order to speculate about their shared concerns and the uncertain future before them. Since animal damage and the management of that damage cannot be abstracted from the environmental context in which they occur, this …
Atlas Of Essential Wildlife Habitats For Maine's Endangered And Threatened Species, Maine Department Of Inland Fisheries And Wildlife
Atlas Of Essential Wildlife Habitats For Maine's Endangered And Threatened Species, Maine Department Of Inland Fisheries And Wildlife
Maine Collection
Atlas of Essential Wildlife Habitats for Maine's Endangered and Threatened Species
Maine Department of Inland Fisheries and Wildlife, 284 State Street, Augusta, Maine, 04333. 2000 Edition ("Valid through December 31, 2000").
"Printed under appropriations 014/013-09A-2004/3204-012".
Sistem Maklumat Multimedia Batu Karang Malaysia (Mcris), Shamsudin Suhainah
Sistem Maklumat Multimedia Batu Karang Malaysia (Mcris), Shamsudin Suhainah
Student Works (2000-2009)
Projek Ilmiah merupakan syarat wajib kepada para pelajar yang mengambil kursus Sarjana Muda Teknologi Maklumat (Pengurusan) di Universiti Malaya yang ingin menamatkan pengajian mereka. Projek ini terbahagi kepada dua bahagian iaitu Projek Ilmiah Tahap Awal (WXET 3181) dan Projek Ilmiah Tahap Akhir (WXET 3182). Pelajar dibenarkan memilih tajuk sendiri. Maka, saya telah memilih tajuk Sistem Maklumat Multimedia Batu Karang di Malaysia (McRis) di bawah seliaan En. Mustaffa Kamal dan Dr. Mazliza sebagai moderator. McRis merupakan satu sistem maklumat yang berkaitan dengan batu karang yang terdapat di firdausi taman laut kita seperti jenis-jenisnya dan sedikit penerangan yang disertakan dengan gambar yang …
Characterization And Improvement Of Eos Land Products Using Measurements At Ameriflux Grassland And Wheat Sites In The Arm/Cart Region: Research Annual Performance Report For Period March 1, 2000- February 28, 2001, E. A. Walter-Shea, S. B. Verma
Characterization And Improvement Of Eos Land Products Using Measurements At Ameriflux Grassland And Wheat Sites In The Arm/Cart Region: Research Annual Performance Report For Period March 1, 2000- February 28, 2001, E. A. Walter-Shea, S. B. Verma
School of Natural Resources: Documents and Reviews
No abstract provided.
Biochemical Composition Of Particles And Dissolved Organic Matter Slong An Estuarine Gradient: Sources And Implications For Dom Reactivity, Antonio Mannino, H. Rodger Harvey
Biochemical Composition Of Particles And Dissolved Organic Matter Slong An Estuarine Gradient: Sources And Implications For Dom Reactivity, Antonio Mannino, H. Rodger Harvey
OES Faculty Publications
The chemical composition of high molecular weight dissolved organic matter (DOM) and particulate organic matter (POM) was examined along the salinity gradient of the Delaware Estuary. DOM was collected and fractionated by tangential-flow ultrafiltration into 1-30 kDa (HDOM; high molecular weight) and 30 kDa to 0.2 μm (VHDOM; very high molecular weight) and compared to particles collected in parallel. Polysaccharides comprised 12-43% of particulate organic carbon (POC), 30-56% of VHDOM carbon, and 7.5-19% of HDOM carbon. Hydrolyzable amino acids comprised 17-38% of POC, 5.4-12% of VHDOM carbon, and 1.5-4.2% of HDOM carbon. Only 7-43% of dissolved organic nitrogen in VHDOM …
Black-Tailed Deer Habitat Changes In A Portion Of The Mount St. Helens Blast Zone, Ronald W. Davis
Black-Tailed Deer Habitat Changes In A Portion Of The Mount St. Helens Blast Zone, Ronald W. Davis
All-Inclusive List of Electronic Theses and Dissertations
This study utilized Landsat TM imagery to evaluate black-tailed deer habitat changes in a portion of the Mount Saint Helens blast zone in western Washington. The purpose of this study was to compare the post eruption vegetation changes with population trends for black tailed deer. The 55,000-acre study area comprises a Washington Department of Game Management unit (GMU 524) located to the northnorthwest of Mount St. Helens. Approximately 80% ofthe mostly forested study area was affected by lateral blast from the 1980 eruption. The area is predominantly private land managed for timber production but a small portion falls within the …
Reciprocal Transplantation Of The Desert Soil Crust: Can It Be Done?, Christina D. Cole
Reciprocal Transplantation Of The Desert Soil Crust: Can It Be Done?, Christina D. Cole
UNLV Theses, Dissertations, Professional Papers, and Capstones
A 100 meter X 100 meter study site was chosen at White Rock Springs in Red Rock Canyon National Conservation Area, Nevada. To examine Syntrichia caninervis, a desert crustal moss, reciprocal transplantations (20 mm and 40 mm diameter cores) were performed between shaded to shaded, exposed to exposed, and shaded to exposed microsites to determine if it was possible to transplant the study organism with reasonable survivorship. Transplants were inspected following rain events for percent hydration, number of dead stems, and change in percent cover. Data indicated that there was a low mortality rate of S. caninervis stems, and few …
The Prairie Naturalist Volume 31 No.4 December 1999
The Prairie Naturalist Volume 31 No.4 December 1999
The Prairie Naturalist
THE FISHES OF THE UPPER MOREAU RIVER ▪ T. M. Loomis, C. R. Berry, Jr., and J. Erickson
DO INTERNAL FIRE LANES AFFECT NEST DEPREDATION RATES IN PRAIRIES? ▪ K. A. Warren and M. R. Ryan
SPECIES COMPOSITION AND TROPHIC STRUCTURE OF INSECT COMMUNITIES IN TEXAS PRAIRIES. ▪ G. N. Cameron and E. H. Bryant
FIDELITY OF MALLARDS TO ARTIFICIAL NESTING STRl!CTURES ▪ T. Yerkes
OBSERVATIONS ON REPRODUCTION IN THREE SPECIES OF BATS ▪ D. W. Sparks, J. R. Choate, and R. J. Winn
EARLIEST SEASONAL RECORD OF REPRODUCTION IN THE HOARY BAT ON THE NORTHERN GREAT PLAINS ▪ T. …
Fall 1999, Nsu Oceanographic Center
Three-Dimensional Reconstructions Of Tadpole Chondrocrania From Histological Sections, Gary P. Radice, Mary Kate Boggiano, Mark Desantis, Peter M. Larson, Joseph Oppong, Matthew T. Smetanick, Todd M. Stevens, James Tripp, Rebecca A. Weber, Michael Kerckhove, Rafael O. De Sá
Three-Dimensional Reconstructions Of Tadpole Chondrocrania From Histological Sections, Gary P. Radice, Mary Kate Boggiano, Mark Desantis, Peter M. Larson, Joseph Oppong, Matthew T. Smetanick, Todd M. Stevens, James Tripp, Rebecca A. Weber, Michael Kerckhove, Rafael O. De Sá
Biology Faculty Publications
Reconstructing three dimensional structures (3DR) from histological sections has always been difficult but is becoming more accessible with the assistance of digital imaging. We sought to assemble a low cost system using readily available hardware and software to generate 3DR for a study of tadpole chondrocrania. We found that a combination of RGB camera, stereomicroscope, and Apple Macintosh PowerPC computers running NIH Image, Object Image, Rotater. and SURFdriver software provided acceptable reconstructions. These are limited in quality primarily by the distortions arising from histological protocols rather than hardware or software.
Summer 1999, Nsu Oceanographic Center
Avian Communities Of Large Reclaimed Mine Grasslands In Southwestern Indiana, Travis L. Devault
Avian Communities Of Large Reclaimed Mine Grasslands In Southwestern Indiana, Travis L. Devault
All-Inclusive List of Electronic Theses and Dissertations
Many bird species native to the tallgrnss prairie region oCthc central U.S. have declined drastically since European settlement due lo the destruction and alteration of grassland habitat. In this study, the breeding bird communities or 21 large reclaimed surface coal mine grasslands in a seven-county area or southwestern Indiana were examined with respect to species and guild composition, density, variation among sites, and grassland size. In addition, the vegetation characteristics of nine large mine grasslands were described and related to the presence and abundance or eight grasslund bird species common to the study areas. The immense size of mine grasslands …
The Prairie Naturalist Volume 31, No.3 September 1999
The Prairie Naturalist Volume 31, No.3 September 1999
The Prairie Naturalist
HANTA VIRUS INFECTION IN NORTH DAKOTA SMALL MAMMALS: 1994,1995 ▪ R. W. Seabloom, J. J. Feist, and S L. McDonough
AMERICAN WOODCOCK IN COLORADO ▪ C. E. Braun
AVIFAUNA OF AN EARLY SUCCESSIONAL HABITAT ALONG THE MIDDLE MISSOURI RIVER ▪ D. L. Swanson
REPRODUCTIVE STATUS OF FLEA BEETLES IN NORTH DAKOTA AND SOUTH DAKOTA ▪ M. A. Brinkman and S. A. Clay
NUTRIENT AND ENERGY CHARACTERISTICS OF INVERTEBRATES FROM TWO LOCATIONS IN KANSAS ▪ S. G. Papon, R. J. Robel, and K. Kemp
BOOK REVIEWS
The Wood Warblers ▪ M. G. Knutson
A Fascination With Birds. ▪ J. A. Dechant …
The Translocation Of Barramundi. A Discussion Paper., Makaira Pty Ltd
The Translocation Of Barramundi. A Discussion Paper., Makaira Pty Ltd
Fisheries Management Papers
There is recognisable economic benefit to the translocation of barramundi, but there is also a need to ensure the translocation will not adversely impact upon the genetic diversity, introduce disease or impact on the natural environment and biodiversity. This discussion paper has been prepared to provide information to assist in the assessment of the possible impact of translocation of barramundi into and within Western Australia, for the purposed of recreational stock enhancement, aquaculture development and domestic stocking. In contemplating the translocation any aquatic species, signigicant economic and social benefits must be balanced with biological and environmental risks; that is, the …
The Prairie Naturalist Volume 31, No.2 June 1999
The Prairie Naturalist Volume 31, No.2 June 1999
The Prairie Naturalist
SPATlAL VARIATION IN POPULATION CHARACTERISTICS OF SHOVELNOSE STURGEON IN THE KANSAS RIVER ▪ M. C. Quist and C. S. Guy
INFLUENCE OF FIRE AND TRAPPING EFFORT ON GROUND BEETLES IN A RECONSTRUCTED TALLGRASS PRAIRIE ▪ K. J. Larsen and J. B. Williams
FISH ASSEMBLAGES AND HABITAT RELATIONSHIPS IN A SMALL NORTHERN GREAT PLAINS STREAM ▪ C. A. Barfoot and R. G. White
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA 1998 ▪ R. N. Randall
NEW RECORDS OF THE PYGMY SHREW IN SOUTHEAST SOUTH DAKOTA ▪ C. B. King, G. M. Wilson, and P. D. Sudman
BUFFLEHEAD BROOD IN NORTHEASTERN SOUTH DAKOTA …
Ultraviolet-B Radiation: Effects On Pollen Of 34 Taxa, And Inheritance Patterns And Carryover Of Radiation Response In Arabidopsis, Javad Torabinejad
Ultraviolet-B Radiation: Effects On Pollen Of 34 Taxa, And Inheritance Patterns And Carryover Of Radiation Response In Arabidopsis, Javad Torabinejad
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Although considerable research has addressed effects of elevated ultraviolet-B (UV-8) radiation on vegetative plant structures and processes, the reproductive biology and patterns of inheritance of UV-B tolerance have received much less attention. I examined the effects of UV-B radiation on pollen of 34 taxa. I also addressed questions concerning the patterns of inheritance of UV-B tolerance in Arabidopsis thaliana and examined potential cumulative carryover effects of UV-B exposure through multiple generations of this species.
In the first study, a significant reduction in pollen germination occurred in only five species, but pollen tube growth in more than half of the species …
Spring 1999, Nsu Oceanographic Center
Benthic Community Analysis Of Hog Island Bay, Virginia, David James Lewis
Benthic Community Analysis Of Hog Island Bay, Virginia, David James Lewis
Biological Sciences Theses & Dissertations
The benthic infaunal macroinvertebrate communities of Hog Island Bay of the Virginia Eastern Shore were quantitatively sampled at 30 locations on August 31 and September 1, 1995. The primary objectives of this study were: (1) to characterize the subtidal macroinfaunal benthic communities of Hog Island Bay, (2) to examine relationships between abiotic factors and the macroinfaunal communities and (3) to characterize the environmental condition of the system using the Benthic Index of Biotic Integrity (B-IBI) (Weisburg et al. 1997) and the EMAP Benthic Index for the Virginian Province (Strobel et al. 1995).
The ecological condition of Hog Island Bay appears …
The Prairie Naturalist Volume 31, No.1 March 1999
The Prairie Naturalist Volume 31, No.1 March 1999
The Prairie Naturalist
NEST SITE CHARACTERISTICS OF RING-NECKED PHEASANTS IN EASTERN SOUTH DAKOTA ▪ J. R. Purvis, A. E. Gabbert, and L. D. Flake
FIELD EVALUATION OF RADIOTRANSMITTERS FOR NORTHERN POCKET GOPHERS ▪ G. W. Witmer and M. J. Pipas
DISTRlBllTiON OF A MOlJND-BUILDING ANT ON NATIVE AND RESTORED PRAIRIES IN NORTHEASTERN KANSAS ▪ J. Foster and W. D. Kettle
RESULTS OF A WILD TURKEY RELEASE IN KANSAS TALLGRASS PRAIRIE ▪ J. F. Cully, Jr., P. R. Lemons, II, and R. D. Applegate
BODY-SIZE AND AGE'-RELATED MASTICATORY RELATIONSHIPS IN TWO SPECIES OF BLARINA ▪ B. J. Verts, L. N. Carraway, and R. A. …
Internal Temperature Of Douglas-Fir Buds Is Altered At Elevated Temperature, Martha E. Apple, Melissa S. Lucash, David M. Olszyk, David T. Tingey, Donald L. Phillips
Internal Temperature Of Douglas-Fir Buds Is Altered At Elevated Temperature, Martha E. Apple, Melissa S. Lucash, David M. Olszyk, David T. Tingey, Donald L. Phillips
Environmental Science and Management Faculty Publications and Presentations
Pseudotsuga menziesii (Douglas-fir) saplings were grown in sun-lit controlled environment chambers at ambient or elevated (4°C above ambient) temperature. We measured internal temperatures of vegetative buds with thermocouple probes and compared temperatures of normal buds and abnormal buds with loosened, rosetted outer scales in elevated temperature chambers. The abnormal buds had higher and earlier peak daily temperatures than normal buds. Elevated temperature may influence the internal temperature of buds and contribute to the development of abnormal, rosetted buds with loosened outer scales. Abnormal bud development may alter branching patterns and allometry of Douglas-fir trees subjected to climatic change.
The Relative Importance Of Patch Area And Perimeter–Area Ratio To Grassland Breeding Birds, Christopher J. Helzer, Dennis E. Jelinski
The Relative Importance Of Patch Area And Perimeter–Area Ratio To Grassland Breeding Birds, Christopher J. Helzer, Dennis E. Jelinski
School of Natural Resources: Faculty Publications
Habitat fragmentation has been implicated as a major cause of population decline in grassland birds. We tested the hypothesis that a combination of area and shape determines the use of grassland patches by breeding birds. We compared both species richness and individual species presence in 45 wet meadow grasslands in the floodplain of the central Platte River, Nebraska. Bird data were collected through the use of belt transects and supplemented by walking and listening outside transects. Our data supported our primary hypothesis that perimeter–area ratio, which reflects both the area and shape of a patch, is the strongest predictor of …
Characterization And Improvement Of Eos Land Products Using Measurements At Ameriflux Grassland And Wheat Sites In The Arm/Cart Region: Research Annual Performance Report For Period March 1, 1999- February 29, 2000., E. A. Walter-Shea, S. B. Verma
Characterization And Improvement Of Eos Land Products Using Measurements At Ameriflux Grassland And Wheat Sites In The Arm/Cart Region: Research Annual Performance Report For Period March 1, 1999- February 29, 2000., E. A. Walter-Shea, S. B. Verma
School of Natural Resources: Documents and Reviews
No abstract provided.
Winter 1999, Nsu Oceanographic Center