Digital Commons Network^™

Production Of The Subtropical Seagrass, Halodule Wrightii Aschers., In Lower Laguna Madre, Texas, Joseph L. Kowalski

Theses and Dissertations - UTB/UTPA

The autecology of shoal grass, Halodule wrightii Aschers., was studied at 1.2 m depth from June 1995 to February 1997 in Lower Laguna Madre (LLM), Texas. Halodule wrightii in LLM received about 47% surface irradiance, but otherwise displayed lower growth rates and biomass in nutrient-poor rhizosphere and water-column environments compared to H. wrightii populations in other Texas estuaries. High tissue N content and low C:N ratios belied low growth dynamics. Halodule wrightii in LLM is probably nutrient limited. A high nutrient demand by H. wrightii in a nutrient-poor environment may explain, in part, its gradual displacement by Thalassia testudinum and …

Effects Of Watershed Land Use On The Benthic Macroinvertebrate Assemblages In Ridge And Valley Streams In Chattanooga, Tennessee, Paul Leiper Freeman

Masters Theses and Doctoral Dissertations

A total of 20 sites in five Ridge and Valley streams located in Chattanooga, Tennessee were sampled May 8, 1998 to June 18, 1998 using quantitative and qualitative macroinvertebrate sampling techniques. All streams sampled were part of the Tennessee River drainage system and eventually contribute to Nickajack Reservoir. The 20 sites were second to fourth order streams with drainage areas of 3.8 to 46.9 (km2) and elevations of 195 to 232 (m). Sites with different percentages of agricultural, urbanized and forested land-use were selected to best evaluate the resulting impacts of urbanization and other anthropogenic activities on the invertebrate community …

Evaluation Of Sampling Methodologies For Assessing Fish Species Richness In Ridge And Valley Streams In Chattanooga, Tennessee, Evan Robertson Crews

Masters Theses and Doctoral Dissertations

I evaluated the adequacy of different electrofishing approaches for estimating species richness in small Ridge and Valley streams. My study objectives were to determine the effects of the sampling season, reach length, habitat sequences surveyed, and sampling intensity on estimates of fish species richness. Fish assemblages were sampled at 18 sites across five streams in the Chattanooga, Tennessee area, May-June (spring) and July-August (summer) 1998. Reach lengths ranged from 103 to 278 m (30 to 61 times the mean stream width [MSW]). At each site, fish were collected using one or two backpack electrofishers within habitat-specific enclosures (riflle-run or pool). …

Comparative Studies Of Reaction Norms In Response To Light In Arabidopsis, Heidi J. Pollard

Masters Theses

The evolution of reaction norms has rarely been addressed from within a phylogenetic comparative framework, despite general agreement that we need a better understanding of how historical and deterministic processes (e.g., selection and constraints) interact to yield a particular pattern of variation of phenotypic plasticity within and across species. In this study the reaction norms to daylength and foliage shade(changes in light quality) were compared in eight accessions of iArabidopsis thaliana from Scandinavia and three closely related species, A. arenosa, A. lyrata subsp. petraea,and A. suecica. There was a high correlation among the trait means in response to daylength …

Remote Sensing Of Photosynthetic-Light-Use Efficiency Of Boreal Forest, Caroline J. Nichol, Karl F. Huemmrich, T. Andrew Black, Paul G. Jarvis, Charles L. Walthall, John Grace, Forrest G. Hall

United States National Aeronautics and Space Administration: Publications

Using a helicopter-mounted portable spectroradiometer and continuous eddy covariance data we were able to evaluate the photochemical reflectance index (PRI) as an indicator of canopy photosynthetic light-use efficiency (LUE) in four boreal forest species during the Boreal Ecosystem Atmosphere experiment (BOREAS). PRI was calculated from narrow waveband reflectance data and correlated with LUE calculated from eddy covariance data. Significant linear correlations were found between PRI and LUE when the four species were grouped together and when divided into functional type: coniferous and deciduous. Data from the helicopter-mounted spectroradiometer were then averaged to represent data generated by the Airborne Visible Infrared …

Spectator 1999-11-18, Editors Of The Spectator

The Spectator

No abstract provided.

Spectator 1999-11-04, Editors Of The Spectator

The Spectator

No abstract provided.

The Probe, Issue 205 – October 1999

The Probe: Newsletter of the National Animal Damage Control Association

Legislative News: Senate Kills Anti-Trapping Measure
Washington Stalls Anti-Trap Bills
Raccoon Roundworm Brochure Available
NWRC Biologist George Matschke Retires
Problem Mexican Gray Wolves Being Relocated
Chipmunk Found Rabid
Rock Star Scares Birds --"What the birds really hate is Tina Turner."
Rat Travels Business Class
What's Killing Colorado Deer?

Abstracts from the 2nd International Wildlife Management Congress, Hungary

History and Present Status of the European Beaver (Castor fiber) in Poland, with Implications for Beaver Management Programs -- A. Czech, Institute of Environmental Biology, Jagiellonian University, Krakow, Poland
Assessment of Elephant Damage and Mitigation Options in Amboseli Basin, Kenya -- E.E. Esikuri* …

Fall 1999, Seattle University

Seattle University News (Sun)

No abstract provided.

Differentiation Of Mexican Species Of Haematoloechus Looss, 1899 (Digenea: Plagiorchiformes): Molecular And Morphological Evidence, Virginia León-Règagnon, Daniel R. Brooks, Gerardo Perez-Ponce De Leon

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Molecular evidence is interpreted in the light of morphology to examine the validity of several species of Haematoloechus described as Mexican endemics. Internal transcribed spacers 1 and 2 and 28S ribosomal genes were sequenced for 11 isolates. Phylogenetic analysis of separate partitions and combined databases was conducted. Results were analyzed, in the light of morphological evidence. Haematoloechus macrorchis is proposed as a junior synonym of Haematoloechus longiplexus. Haematoloechus pulcher is a sibling species with Haematoloechus complexus in Lerma wetlands. In Mexico, Haematoloechus medioplexus is distributed along the east coast coinciding with the distribution of Rana berlandieri. The sister …

The Structure And Function Of Ecosystems In The Central North American Grassland Region, W. K. Luaenroth, I .C. Burke, M. P. Gutmann

Great Plains Research: A Journal of Natural and Social Sciences

The central grassland region occupies the center of North America in the United States, Canada and Mexico and is a unique resource for the continent. While there are no other areas with comparable features, the largest similar grassland areas occur in Europe and Asia. The uniqueness of the region derives from its size, its relative flatness, and the smoothness of its physical gradients. The smooth gradients in precipitation and temperature are the reasons why most gradients in ecosystem properties are also smooth. The west-east gradient in precipitation and the north-south gradient in temperature result in corresponding gradients in plant community …

Recent Biodiversity Patterns In The Great Plains: Implications For Restoration And Management, Carolyn Hull Sieg, Curtis H. Flather, Stephan Mccanny

Great Plains Research: A Journal of Natural and Social Sciences

Ecosystem, species and genetic dimensions of biodiversity have eroded since widespread settlement of the Great Plains. Conversion of native vegetation in the region followed the precipitation gradient, with the greatest conversion in the eastern tallgrass prairie and eastern mixed-grass types. Areas now dominated by intensive land uses are "hot spots" for exotic birds. However, species of all taxa listed as threatened or endangered are well-distributed across the Great Plains. These species are often associated with special landscape features, such as wetlands, rivers, caves, sandhills and prairie dog towns. In the long run, sustaining biodiversity in the Great Plains, and the …

Response Of Riparian Vegetation To Streamflow Regulation And Land Use In The Great Plains, W. Carter Johnson

Great Plains Research: A Journal of Natural and Social Sciences

The influence of human activities on riparian zone vegetation differs markedly by ecoregion and stream size. Large rivers, dams and water diversions affect ecological processes more than local land uses do. However, for small streams, the reverse is generally true. Examples demonstrating these relationships include studies completed on the Missouri River in North Dakota, the Platte River in Nebraska, and Foster Creek in western South Dakota. On the Missouri River, damming has stopped river meandering and the regeneration of riparian forests in gaps between reservoirs. In contrast, on the Platte River, diversion of a large portion of the flow for …

Comparative Taphonomy And Paleoecology Of A Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina, Rex A. Hanger, Mohutsiwa Gabadirwe

Virginia Journal of Science

The Carboniferous La Capilla Fm. of the Calingasta-Uspallata basin of western Argentina contains a low diversity fauna inhabiting a continental shelf under glacial ice fronts advancing from the east. Distal glaciomarine sediments on these ice-influenced shelves of Gondwana are most commonly interpreted as being deposited under quiet, low-energy conditions. Ta­phonomic and paleoecologic analysis of a sample of the fauna reveals the following: low species richness, yet comparable equitability to coeval, tropi­cal faunas; low articulation ratios and high pedicle valve dominance for brachiopods; diverse corrasion modes, about half relatively high categories; one hundred percent fracturing of brachiopod shells, with carinate fracture …

Food Intake Patterns And Gallbladder Disease In Mexican Americans, Marilyn Tseng, Robert F. Devellis, Kurt R. Maurer, Meena Khare, Lenore Kohlmeier, James E. Everhart, Robert S. Sandler

Kinesiology and Public Health

Objective: Results of previous studies on diet and gallbladder disease (GBD), defined as having gallstones or having had surgery for gallstones, have been inconsistent. This research examined patterns of food intake in Mexican Americans and their associations with GBD. Design: Cross-sectional. Subjects: The study population included 4641 Mexican Americans aged 20±74 years who participated in the 1988±94 third National Health and Nutrition Examination Survey (NHANES III). GBD was diagnosed by ultrasound. Food intake patterns were identifed by principal components analysis based on food frequency questionnaire responses. Component scores representing the level of intake of each pattern were categorized into quartiles, …

1999 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 1999 through spring 2000.

Lady Griz Basketball Media Guide, 1999-2000, University Of Montana--Missoula. Athletics Department

Lady Griz Basketball Media Guides, 1978-2009

Media guide created about the Lady Griz basketball team.

Tcwp Newsletter No. 229, Tennessee Citizens For Wilderness Planning

Tennessee Citizens for Wilderness Planning Newsletters

No abstract provided.

Evidence For Circumpolar Distribution Of Planktonic Archaea In The Southern Ocean, Alison E. Murray, Ke Ying Wu, Craig L. Moyer, Dave M. Karl, Edward F. Delong

Biology Faculty and Staff Publications

Surveys using rRNA-targeted probes specific for the 3 domains of life (Eucarya, Archaea, and Bacteria) indicated the presence, and at times high abundance, of archaeal rRNA in a variety of water masses surrounding Antarctica. Hybridization signals of archaeal rRNA contributed significantly to that of total picoplankton rRNA both north and south of the Polar Front in Drake Passage. Late winter surface water populations collected around the South Shetland Islands also yielded relatively high archaeal rRNA hybridization signals, approaching 10% or greater of the total rRNA. Summer samples collected in the western region of the Antarctic Peninsula and at McMurdo Sound …

The Biological Flora Of Coastal Dunes And Wetlands. Ipomoea Imperati (Vahl) Griseb., Robert I. Lonard, Frank W. Judd

Biology Faculty Publications and Presentations

Beach morning glory, Ipomoea imperati (Vahl) Griseb. = I. stolonifera (Cirillo) Gmelin is a pantropical, prostrate vine that is an important pioneer species in the backshore of coastal beaches of six continents and many islands. The landward distribution of beach morning glory is influenced by dispersal and competition, and its seaward distribution is determined by the physical environment acting through movement of seeds away from the water and high seedling mortality in the backshore. It is occasionally found in disturbed sites on barrier islands well inland from the shore. Beach morning glory tolerates low levels of soil nutrients, sand scouring, …

Resource Partitioning Between Coyotes And Swift Foxes: Space, Time, And Diet, Ann M. Kitchen, Eric M. Gese, Edward R. Schauster

United States Department of Agriculture Wildlife Services: Staff Publications

In its current distribution and abundance, the swift fox (Vulpes velox) has been significantly reduced from its historic range. A possible cause is competition with, and predation by, coyotes (Canis latrans). We investigated the level of spatial, temporal, and dietary resource use overlap between swift foxes and coyotes at the Pinon Canyon Maneuver Site in southeastern Colorado. We captured and radio-tracked 73 foxes and 24 coyotes from April 1997 to August 1998. We collected 10 832 and 5350 locations of foxes and coyotes, respectively. Overall, home-range sizes of foxes and coyotes were 7.6 ± 0.5 (mean ± SE) …

The Crest, Summer 1999, Virginia Institute Of Marine Science

Reports

Table of Contents:

• New Research Aquarium System
• Finfish Aquaculture at VIMS
• Virginia Creates State Research Reserve System
• Pollution-Laden Sediments In Constant Flux
• Survey of Mid-Atlantic Sea Scallop Closed Areas
• Pfiesteria Update
• New Computer Program Helps Planners Balance Growth, Protection
• Virginia Sea Grant to Administer Commercial Fishery Resource Program
• VIMS Stranded Sea Turtle Project Underway Coastal Sediments Offer Clues to Climate Change, Pollution
• Seemingly Barren Habitat Proves Vital for Economically Important Virginia Fish (juvenile flounder)

Ada News - 06/21/1999, American Dental Association, Publishing Division

ADA News

Established in 1970 as the official newspaper of the American Dental Association, the ADA News serves practicing dentists and others allied to the dental profession in the U.S. and internationally. It is the No. 1 source of news and information about the many benefits and services the ADA delivers to members daily as well as timely information on scientific, social, political and economic developments affecting dentistry and health care.

Toward A Law Of The Land: The Clean Water Act As A Federal Mandate For The Implementation Of An Ecosystem Approach To Land Management, Jory Ruggiero

Public Land & Resources Law Review

No abstract provided.

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 …

The Mayfly Newsletter, Peter M. Grant

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.

Development And Application Of A Genetic Algorithm-Informational Modeling Approach To Exploatory Statistical Modeling Of Lizard-Habitat Relationships, James J. Minesky

Doctoral Dissertations

Anolis carolinensis, an arboreal lizard common to the southeasternUnited States, has been studied often in lab settings, but infrequently in its natural habitats with respect to the ecology of this species. The current study conducted exploratory statistical modeling of associations between 18 habitat features and the occurrence of A. carolinensis in study plots at the northern distributional limits of this species in eastern Tennessee.Statistical hypothesis-testing procedures and stepwise computer algorithms are commonly used by ecologists to analyze observational (nonexperimental)multivariate data, such as the data analyzed in this study.However, such procedures and algorithms are frequently, but inappropriately, used to find …

The Perspectives Of The Air Line Pilots Association On Strikes Of Wildlife By Aircraft, Paul F. Eschenfelder

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

Strikes of wildlife by aircraft cause thousands of life-threatening incidents, and hundreds of millions of dollars worth of damage to aircraft every year. This hazard is largely preventable, but it has not been properly addressed to date for a variety of reasons. ALPA believes that action should be taken now before a catastrophe occurs.

Collisions between aircraft and wildlife are increasing in frequency in North America due to growth in the number of migratory birds and other wildlife and the increased numbers of aircraft operations. This threat to human safety has manifested itself in several fatal strikes between aircraft and …

Temporal And Spatial Patterns Of Avifauna On Wetlands In The Vicinity Of Bush Field Airport, Augusta, Georgia, Usa, Robert A. Kennamer, L. Brisbin Jr., K. F. Gaines, W. L. Stephens Jr.

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

Responding to a U.S. Federal court order to improve discharged wastewater quality, Augusta, Georgia initiated development of artificial wetlands in 1997 to treat effluents. Because of the proximity to Augusta Regional Airport at Bush Field, the U.S. Federal Aviation Administration expressed concern for potential increased hazard to aircraft posed by birds attracted to these wetlands. We commenced weekly low-level aerial surveys of habitats in the area beginning January, 1998. Over a one-year period, 49 surveys identified approximately 42,000 birds representing 52 species, including protected Wood Storks and Bald Eagles, using wetlands within 8 km of the airport. More birds were …

The Benefits And Costs Of Performing An Ecological Study At The Minneapolis-St. Paul International Airport: A Journey Of Enlightenment, John Ostrom

Bird Strike Committee-USA/Canada Joint Annual Meeting: 1st (1999)

MSP Ecological Study--Objectives 1. To identify any and all species of wildlife present at MSP that may pose a threat to aviation safety and to document their numbers, seasonal distribution, behavior and natural or man-made features that are attractive to wildlife on or near the airport.
2. To make recommendations for mitigation of identified wildlife attractants and management of wildlife species that may pose a threat to aviation safety.