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Volume 38, Number 42: July 27, 2001, University Of North Dakota

University Letter Archive

No abstract provided.

The Emerging Periplasm-Localized Subclass Of Aroq Chorismate Mutases, Exemplified By Those From Salmonella Typhimurium And Pseudomonas Aeruginosa, David H. Calhoun, Carol A. Bonner, Wei Gu, Gary Xie, Roy A. Jensen

Publications and Research

Background Chorismate mutases of the AroQ homology class are widespread in the Bacteria and the Archaea. Many of these exist as domains that are fused with other aromatic-pathway catalytic domains. Among the monofunctional AroQ proteins, that from Erwinia herbicola was previously shown to have a cleavable signal peptide and located in the periplasmic compartment. Whether or not this might be unique to E. herbicola was unknown. Results The gene coding for the AroQ protein was cloned from Salmonella typhimurium, and the AroQ protein purified from both S. typhimurium and Pseudomonas aeruginosa was shown to have a periplasmic location. The periplasmic …

Soundings 2001-07-27 (V.14 No.14), N/A N/A

Soundings

No abstract provided.

Defining And Evaluating Exotic Species: Issues For Yellowstone Park Policy, Ned Hettinger

Western North American Naturalist

Exotics are species that are foreign to an ecological assemblage in the sense that they have not significantly adapted to resident biota or to local abiotic conditions, and resident species have not significantly adapted to them. Although they need not be human introduced nor damaging, when they are, a negative appraisal of such exotic species can be justified. Human introduction of exotics into natural systems typically increases human influence over those systems, thus diminishing their wildness. Valuing nature for its wildness is a rationale for the national parks policy of letting nature take its course. Thus, Yellowstone Park has a …

The Naturalness Of Biological Invasions, Daniel B. Botkin

Western North American Naturalist

No abstract provided.

Natural And Unnatural; Wild And Cultural, Holmes Rolston Iii

Western North American Naturalist

Yellowstone National Parks mission and policy can be clarified by analysis of the natural and the unnatural. Nature is a comprehensive word, in some uses excluding nothing; more useful is a contrast distinguishing nature and culture. Specifying "wild nature" denotes spontaneous nature absent human influence. Critics claim that the meaning of wild nature, especially of wilderness, is a foil of culture. Pristine nature, often romanticized, is contrasted with a technological and industrial culture. By this account, wilderness is a social construction.

Nevertheless, wild nature successfully denotes, outside culture, an evolutionary and ecological natural history, which remains present on the Yellowstone …

A Paleoecologic Perspective On Past Plant Invasions In Yellowstone, Cathy Whitlock, Sarah H. Millspaugh

Western North American Naturalist

The role of climate and natural disturbance in the past provides a context for understanding present and future changes in biota. The vegetation history of the Yellowstone region, like that of North America as a whole, is largely one of plant invasions and extinctions in response to changes in climate and environment. When Holocene plant migrations are examined on multiple spatial and temporal scales, several generalities are apparent. First, at a continental and regional scale, plant migration patterns followed the direction of climate change, whereas at local scales plant colonization was governed by site-specific conditions and possibly by biotic interactions. …

Annotated Checklist Of Exotic Vascular Plants In Yellowstone National Park, Jennifer J. Whipple

Western North American Naturalist

Documentation of the arrival of exotic vascular plants in Yellowstone National Park has been sporadic. An annotated checklist of exotic vascular plants is presented, with information about the approximate arrival time in the park of each species and the current extent of the infestation. Yellowstones flora includes 187 exotic vascular plant species (14.8% of the flora), and the park has an extrapolated mean number of exotic species per 10 km² of 47.3. The situation in Yellowstone is compared with other areas in North America. The increase in exotics mirrors a corresponding increase in visitation.

Managing A Complex Exotic Vegetation Program In Yellowstone National Park, Tom Olliff, Roy Renkin, Craig Mcclure, Paul Miller, Dave Price, Dan Reinhart, Jennifer Whipple

Western North American Naturalist

The number of documented exotic plants in Yellowstone National Park has increased from 85 known in 1986 to over 185 today. Exotic plants are substantially impacting the parks natural and cultural resources and are a high management priority. We have adopted an integrated weed management approach with regard to exotic vegetation, emphasizing prevention, education, early detection and eradication, control, and, to a lesser degree, monitoring. The program involves over 140 staff with program expenditures averaging approximately $190,000 annually. Prevention actions include requiring approved gravel on construction projects; banning hay in the backcountry and allowing transport of only certified weed-seed-free hay …

Status And Conservation Of Salmonids In Relation To Hydrologic Integrity In The Greater Yellowstone Ecosystem, Robert W. Van Kirk, Lyn Benjamin

Western North American Naturalist

Native salmonid status was evaluated with an index quantifying distribution and abundance of cutthroat trout (Oncorhynchus clarki) and grayling (Thymallus arcticus) in 41 watersheds comprising the Greater Yellowstone Ecosystem. We assessed hydrologic integrity with a percentile-based index measuring cumulative effects of reservoirs, surface water withdrawals, and consumptive water use. Status of native salmonids was poor in 70% of the watersheds; exceptions occurred in a north-south core extending from the Upper Yellowstone southward through the national parks to Bear Lake. Hydrologic integrity was highest in headwater areas and lowest in lower-elevation watersheds. Status of native and nonnative …

Spatial Distribution Of Three Snail Species, Including The Invader Potamopyrgus Antipodarum, In A Freshwater Spring, David C. Richards, L. Dianne Cazier, Gary T. Lester

Western North American Naturalist

The highly invasive New Zealand mudsnail, Potamopyrgus antipodarum, may compete with and displace native North American macroinvertebrates in freshwater systems wherever it becomes established. Densities and spatial distributions of 3 snail species including P. antipodarum and the threatened Taylorconcha serpenticola were compared among 3 adjacent habitat types (run, edge, and vegetation) in Banbury Springs, a tributary of the Snake River, near Hagerman, Idaho, USA. In all 3 habitats P. antipodarum was the most abundant snail species. All 3 species densities were highly variable within habitats, suggesting a nonrandom distribution pattern. Densities of P. antipodarum were significantly greatest in the …

Biological Invasions—How Are They Affecting Us, And What Can We Do About Them?, Daniel Simberloff

Western North American Naturalist

Nonindigenous species affect native ecosystems, communities, and populations in myriad ways, from plants (and a few animals) that overgrow entire communities, to plants and animals that hybridize individual native species to a sort of genetic extinction. Further, nonindigenous species sometimes interact to worsen each others impact. These impacts are commonly seen in national parks throughout the United States. The key policy change required to alleviate this threat is a shift from blacklists of prohibited species and a presumption of harmlessness to combinations of white and blacklists and a presumption that any species may be damaging. This new guiding philosophy must …

Full Issue, Vol. 61 No. 3

Western North American Naturalist

No abstract provided.

Effects Of Exotic Species On Yellowstone's Grizzly Bears, Daniel P. Reinhart, Mark A. Haroldson, David J. Mattson, Kerry A. Gunther

Western North American Naturalist

Humans have affected grizzly bears (Ursus arctos horribilis) by direct mortality, competition for space and resources, and introduction of exotic species. Exotic organisms that have affected grizzly bears in the Greater Yellowstone Area include common dandelion (Taraxacum officinale), nonnative clovers (Trifolium spp.), domesticated livestock, bovine brucellosis (Brucella abortus), lake trout (Salvelinus namaycush), and white pine blister rust (Cronartium ribicola). Some bears consume substantial amounts of dandelion and clover. However, these exotic foods provide little digested energy compared to higher-quality bear foods. Domestic livestock are of greater energetic value, but …

New Approaches For Sampling And Modeling Native And Exotic Plant Species Richness, Geneva W. Chong, Robin M. Reich, Mohammed A. Kalkhan, Thomas J. Stohlgren

Western North American Naturalist

We demonstrate new multi-phase, multi-scale approaches for sampling and modeling native and exotic plant species to predict the spread of invasive species and aid in control efforts. Our test site is a 54,000-ha portion of Rocky Mountain National Park, Colorado, USA. This work is based on previous research wherein we developed vegetation sampling techniques to identify hot spots of diversity, important rare habitats, and locations of invasive plant species. Here we demonstrate statistical modeling tools to rapidly assess current patterns of native and exotic plant species to determine which habitats are most vulnerable to invasion by exotic species. We use …

July 27, 2001, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Summer Mustang, July 26, 2001

Cal Poly Student Newspaper

Student newspaper of California Polytechnic State University, San Luis Obispo, CA.

Biosimmer: Virtual Reality Based Experiential Learning, Sharon Stansfield

Historical and Administrative Collection

Slides from a presentation given at the UNM Health Sciences Center.

University Of New Hampshire Will Honor Philanthropic Excellence On University Day, September 11, Sarah Aldag

Media Relations

No abstract provided.

Daily Eastern News: July 25, 2001, Eastern Illinois University

July

No abstract provided.

Responses Of An Arctic Landscape To Lateglacial And Early Holocene Climatic Changes: The Importance Of Moisture, Daniel H. Mann, Dorothy M. Peteet, Richard E. Reanier, Michael L. Kunz

United States National Aeronautics and Space Administration: Publications

Many of the physical and biological processes that characterize arctic ecosystems are unique to high latitudes, and their sensitivities to climate change are poorly understood. Stratigraphic records of land–surface processes and vegetation change in the Arctic Foothills of northern Alaska reveal how tundra landscapes responded to climatic changes between 13,000 and 8000 ¹⁴Cyr BP. Peat deposition began and shrub vegetation became widespread ca. 12,500 ¹⁴Cyr BP, probably in response to the advent of warmer and wetter climate. Increased slope erosion caused rapid alluviation in valleys, and Populus trees spread northward along braided floodplains before 11,000 ¹⁴Cyr BP. …

The Effect Of Ethanol And Acetate On Protein Expression In Pichia Pastoris, Mehmet İnan, Michael M. Meagher

Papers in Biochemical Engineering

Pichia pastoris is an excellent host for high-level heterologous gene expression, but there is still much interest in improving the productivity of recombinant protein production. P. pastoris produces a small amount of ethanol as a by-product during the glycerol fed-batch phase and the mixed-feed induction phase (glycerol-methanol) of high cell density fermentations, regardless of the phenotype (Mutf, Mut" or Mut-). We have investigated ethanol repression of the AOXl promoter using strains, GS115 (Mutf) and MC100-3 (Mut-), expressing an AOXI-lac2 fusion. The addition of 10 mg t1 ethanol at the start of methanol induction delayed P-galactosidase production and methanol utilization …

July 25, 2001, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Minutes, 2001 July 24

Agendas and Minutes

No abstract provided.

07/24/2001 - Nilsen Appointed Vp For External Relations.Pdf, University Marketing And Communications

2001

No abstract provided.

Independent- Jul. 24, 2001, Scott Plencner

The Independent (1988-present)

No abstract provided.

Diets Of Wild Versus Released, And Pen-Raised White-Tailed Deer In Southeastern Louisiana, Richard James Meyers

LSU Historical Dissertations and Theses

Twenty pen-raised white-tailed deer (Odocoileus virginianus) were released into mixed pine-hardwood forest habitat in southeastern Louisiana to compare their seasonal diets to the diets of the wild white-tailed deer population. Microhistological analysis was used to estimate the botanical composition of fecal pellet samples collected from both populations of deer over four consecutive seasons. Wild and pen-raised deer diets were found to be an average of 75.18% similar during the entire year of the study, and were significantly associated during all seasons (P < 0.001), indicating that all deer foraged on similar plant taxa in similar proportions regardless of season. Both populations of deer were found to be predominantly browsers during all seasons, with browse and fruit accounting for a yearly average of >55% of deer diets. Results from this study indicate that rehabilitated or translocated deer released into new environments …

Univercity News (2001-07-23)

UniverCity News, 1998-2001

VCU Today, the University’s first official administrative organ, began as a somewhat irregular monthly publication but moved to a bi-weekly newspaper format in the 1980s. The newspaper changed its name to VCU Voice in 1988 and ten years later it appeared under the title UniverCity News. As it neared the end of its run as a physical newspaper, the publication became simply VCU News. These four publications were essentially the same periodical published under different titles by the Office of University Relations. VCU News appeared online for the first time in 2002.

07/23/2001 - Eiu Faculty Continue To Catch Eye Of Idnr.Pdf, University Marketing And Communications

2001

No abstract provided.

July 23, 2001 Reporter, University Of Alabama At Birmingham

eReporter (campus newsletter)

No abstract provided.