Taxonomic Considerations In Listing Subspecies
Under The U.S. Endangered Species Act,
University of Nebraska - Lincoln
Taxonomic Considerations In Listing Subspecies Under The U.S. Endangered Species Act, Thomas Mullins, Susan Haig, Susie Dunham, Pete Loschl, Lisa Sheffield, Erik Beever
USGS Staff -- Published Research
The U.S. Endangered Species Act (ESA) allows listing of subspecies and other groupings below the rank of species. This provides the U.S. Fish and Wildlife Service and the National Marine Fisheries Service with a means to target the most critical unit in need of conservation. Although roughly one-quarter of listed taxa are subspecies, these management agencies are hindered by uncertainties about taxonomic standards during listing or delisting activities. In a review of taxonomic publications and societies, we found few subspecies lists and none that stated standardized criteria for determining subspecific taxa. Lack of criteria is attributed to a centuries-old debate …
Wheatbelt Of Western Australia,
Department of Primary Industries and Regional Development, Western Australia
Wheatbelt Of Western Australia
Geographic Information Services Maps
Map showing the 'wheatbelt' or wheat growing area of south west Western Australia.
Standardized Precipitation Index: User Guide,
University of Nebraska - Lincoln
Standardized Precipitation Index: User Guide, Michael Hayes, Mark Svoboda, Deborah Wood
Drought Mitigation Center Faculty Publications
Over the years, there has been much discussion on what drought indices should be used in a particular climate and for what application. Many drought definitions and indices have been developed and attempts have been made to provide some guidance on this issue. With this in mind, the Interregional Workshop on Indices and Early Warning Systems for Drought was organized and held at the University of Nebraska-Lincoln, United States of America, from 8 to 11 December 2009. It was jointly sponsored by the School of Natural Resources (SNR) of the University of Nebraska, the United States National Drought Mitigation Center …
Petrology Of The Tijeras Greenstone, Bernallio County, New Mexico,
University of New Mexico
Petrology Of The Tijeras Greenstone, Bernallio County, New Mexico
Earth and Planetary Sciences ETDs
The Precambrian metamorphosis rocks of the Tijeras Canyon area crop out along a five-mile, northeast-trending belt, which lies approximately five miles east of the Sandia Mountains front, in north-central New Mexico. The sequence, to the east, is overlain uncomfortably by Pennsylvanian Madera limestone, while the trace of the Tijeras fault marks the western side.
Apparent Tolerance Of Turkey Vultures (Cathartes Aura) To The
Non-Steroidal Anti-Inflammatory Drug Diclofenac,
University of Nebraska - Lincoln
Apparent Tolerance Of Turkey Vultures (Cathartes Aura) To The Non-Steroidal Anti-Inflammatory Drug Diclofenac, William Link, Barnett Rattner, William Link
USGS Staff -- Published Research
The nonsteroidal anti-inflammatory drug diclofenac is extremely toxic to Old World Gyps vultures (median lethal dose ~0.1–0.2 mg/kg), evoking visceral gout, renal necrosis, and mortality within a few days of exposure. Unintentional secondary poisoning of vultures that fed upon carcasses of diclofenac-treated livestock decimated populations in the Indian subcontinent. Because of the widespread use of diclofenac and other cyclooxygenase-2 inhibiting drugs, a toxicological study was undertaken in turkey vultures (Cathartes aura) as an initial step in examining sensitivity of New World scavenging birds. Two trials were conducted entailing oral gavage of diclofenac at doses ranging from 0.08 to …
Geochemistry And Mineralogy Of Late Quaternary Loess In The Upper Mississippi River Valley, Usa: Provenance And Correlation With Laurentide Ice Sheet History,
University of Nebraska - Lincoln
Geochemistry And Mineralogy Of Late Quaternary Loess In The Upper Mississippi River Valley, Usa: Provenance And Correlation With Laurentide Ice Sheet History, Daniel Muhs
USGS Staff -- Published Research
The midcontinent of North America contains some of the thickest and most extensive last-glacial loess deposits in the world, known as Peoria Loess. Peoria Loess of the upper Mississippi River valley region is thought to have had temporally varying glaciogenic sources resulting from inputs of sediment to the Mississippi River from different lobes of the Laurentide Ice Sheet. Here, we explore a new method of determining loess provenance using K/Rb and K/Ba values (in K-feldspars and micas) in loess from a number of different regions in North America. Results indicate that K/Rb and K/Ba values can distinguish loess originating from …
Urban Sprawl As A Risk Factor In
Motor Vehicle Crashes,
University of Nebraska - Lincoln
Urban Sprawl As A Risk Factor In Motor Vehicle Crashes, Reid Ewing, James Grace
USGS Staff -- Published Research
A decade ago, compactness/sprawl indices were developed for metropolitan areas and counties which have been widely used in health and other research. In this study, we first update the original county index to 2010, then develop a refined index that accounts for more relevant factors, and finally seek to test the relationship between sprawl and traffic crash rates using structural equation modelling. Controlling for covariates, we find that sprawl is associated with significantly higher direct and indirect effects on fatal crash rates. The direct effect is likely due to the higher traffic speeds in sprawling areas, and the indirect effect …
Spores Of The Pennsylvanian Toronto Limestone In Kansas And Oklahoma,
University of New Mexico
Spores Of The Pennsylvanian Toronto Limestone In Kansas And Oklahoma
Earth and Planetary Sciences ETDs
The Toronto cyclothem is the lower limestone member of the Oread megacyclothem of the Shawnee group, Virgilian series, Pennsylvanian system and crops of in a linear belt extending north-south for a distance of 300 miles across Oklahoma, Kansas, and parts of Missouri and Nebraska.
Soils And Paleosols,
University of Nebraska - Lincoln
Soils And Paleosols, Daniel Muhs
Publications of the US Geological Survey
This article reviews the nature of modern and ancient soils. Soils are naturally occurring bodies that mantle most of the land surface of the Earth. They are found on virtually every part of the Earth’s land surface, other than areas covered by water bodies (lakes and rivers), glacial ice, or steep slopes in mountainous terrain. Soils occur at the interface of the geosphere, hydrosphere, biosphere, and atmosphere and are the medium of growth for much of the Earth’s plant and animal life. The study of soils as naturally occurring bodies on the Earth’s surface is called pedology (in contrast to …
The Quartz Of Arkansas: Geology, History And Legend,
University of Arkansas, Fayetteville
The Quartz Of Arkansas: Geology, History And Legend, Thomas Paradise
Geosciences Faculty Publications and Presentations
Quartz Crystals has been treasured and utilized through history, and this chapter addresses its many uses, mineralogy, history, and legend over time...
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