Digital Commons Network^™

American Gardens Historic Garden Styles In America, Larry A. Sagers

All Archived Publications

No abstract provided.

Introduction To Taxonomy, Larry A. Sagers, Gretchen Campbell

All Archived Publications

No abstract provided.

Phylogeny And Biogeography Of Ice Crawlers (Insecta: Grylloblattodea): Evidence From Six Molecular Loci, Karl J. Jarvis

Theses and Dissertations

Ice crawlers (Insecta: Grylloblattodea) are rarely encountered insects that consist of five genera representing 26 species from North America and Asia. Asian grylloblattids are the most diverse, but North American ice crawlers (genus Grylloblatta) are known for their adaptation to cold conditions. Phylogenetic relationships among grylloblattid species and genera are not known. Late Pleistocene glaciations had a major effect on the current Grylloblatta distribution, because their specific habitat requirements restrict them to small geographical areas. Six genes were sampled in 37 individuals for 18S rRNA, 28S rRNA, histone 3, 12S rRNA, 16S rRNA, and cytochrome oxidase II (COII) from 27 …

Slides: Ecotrust Forests, Bettina Von Hagen

Community-Owned Forests: Possibilities, Experiences, and Lessons Learned (June 16-19)

Presenter: Bettina Von Hagen, Ecotrust Forests, OR

25 slides

Biology, Habitat Preference, And Larval Description Of Cicindela Cursitans Leconte (Coleoptera: Carabidae: Cicindelinae), Mathew L. Brust, W. Wyatt Hoback, C. Barry Knisley

Department of Entomology: Faculty Publications

Cicindela cursitans LeConte is a small, flightless tiger beetle with a widely scattered distribution in the Great Plains, the Ohio Valley, and the north-central Gulf Coast region. Many aspects of the life history of C. cursitans are poorly known, and the larval stages have remained undescribed until now. We designed experiments to determine specific habitat preference, female oviposition preference, and daily activity cycles of the adults. In addition, we describe the entire pre-adult life history. Adults are most numerous on moist clay soils with sparse to patchy vegetation, but they may also occur in tall-grass prairies. Females oviposit strictly in …

Placement Of Riparian Forest Buffers To Improve Water Quality, Mark D. Tomer, Mike Dosskey, Michael R. Burkart, David E. James, Matthew J. Helmers, Dean E. Eisenhauer

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Riparian forest buffers can improve stream water quality, provided they intercept and remove contaminants from surface runoff and/or shallow groundwater. Soils, topography, hydrology, and surficial geology determine the capability of forest buffers to intercept and treat these flows. This paper describes landscape analysis techniques for identifying and mapping locations where forest buffers can effectively improve water quality. One technique employs soil survey and climate information to rate soil map units for how effectively a buffer would treat runoff. Results can be used to compare map units for relative effectiveness of buffer installations to improve water quality and, accordingly, to prioritize …

Patterns Of Ocean Current Variability On The West Florida Shelf Using The Self-Organizing Map, Yonggang Liu, Robert H. Weisberg

Marine Science Faculty Publications

Patterns of ocean current variability are examined on the West Florida Shelf by a neural network analysis based on the self‐organizing map (SOM), using time series of moored velocity data that span the interval October 1998–September 2001. Three characteristic spatial patterns are extracted in a 3 × 4 SOM array: spatially coherent southeastward and northwestward flow patterns with strong currents and a transition pattern of weak currents. On the synoptic weather timescale the variations of these patterns are coherent with the local winds. On the seasonal timescale the variations of the patterns are coherent with both the local winds and …

Forage News [2005-06], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• UK College of Agriculture Research Farm Celebrates 50 Years
• Maintaining Healthy Horse Pastures (New Poster)
• Barren County Continued as Cattle Capital of Kentucky
• Toward Higher Quality Hay
• Harvest and Storage Method Affects Ergot Alkaloid Concentration in Tall Fescue
• Intake, Digestion, and N Metabolism in Steers Fed Endophyte-Free, Ergot Alkaloid-Producing Endophyte-Infected, or Nonergot-Alkaloid Producing Endophyte-Infected Fescue Hay
• Upcoming Events

In-Situ Monitoring Of Solid Fat Content By Means Of P-Nmr And Ultrasonics, Silvana Martini, Constantin Bertoli, Maria Lidia Herrera, Ian Neeson, Alejandro Marangoni

Nutrition, Dietetics, and Food Sciences Faculty Publications

An ultrasonic technique was developed to study the crystallization process of edible fats on-line. A chirp wave was used instead of the conventional pulser signal, thus achieving a higher signal-to-noise ratio. This enabled measurements to be made in concentrated systems [≈20% solid fat content (SFC)] through a 8.11-cm thick sample without significant signal loss. Fat samples were crystallized at 20, 25, and 30°C at a constant agitation rate of 400 rpm for 90 min. The crystallization process was followed by ultrasonic spectroscopy and a low-resolution pulsed nuclear magnetic resonance spectrometer. Specific relationships were found between ultrasonic parameters [integrated response, time …

Range Expansion By Moose Into Coastal Temperate Rainforests Of British Columbia, Canada, C. T. Darimont, P. C. Paquet, T. E. Reimchen, V. Crichton

Biogeography and Ecological Opportunity Collection

Ranges of species are dynamic and respond to long-term climate change and contemporary effects such as habitat modification. We report here that moose (Alces alces) have recently colonized coastal temperate rainforests of British Columbia, Canada. Contrary to recent publications, field observations of moose and their sign, combined with their occurrence in wolf (Canis lupus) faeces, suggest that moose are now widespread on the coastal mainland and occur on least three islands. Traditional ecological knowledge (information accumulated by aboriginal peoples about their environment) suggests that colonization occurred during the mid 1900s, concomitant with logging of major watersheds that bisect the Coast …

The Effect Of Wildfire On Populations Of The Jemez Mountains Salamander (Plethodon Neomexicanus) With Consideration To Arthropod Prey Availability Following The Cerro Grande Fire Of Northern New Mexico, Michelle R. Cummer

Biology

Fire regimes in North America, including the American Southwest, have undergone relatively dramatic shifts in the last century, resulting in novel stand-replacing fires that are changing landscapes in unprecedented ways. Some possible effects of these novel landscape changes on a terrestrial plethodontid salamander (Plethodon neomexicanus) were investigated. Microhabitat temperatures in four burn-severity types following recent fires were measured. Temperatures were significantly greater in high-severity and moderate-severity burn areas than in low-severity and unburned areas. Salamander presence/absence data from four burn-severity types that were documented as having salamanders prior to wildfire are considered. The proportions of presence and absence …

An East-West Comparison Of Migration In North American Wood Warblers, Jeffrey F. Kelly, Richard L. Hutto

Biological Sciences Faculty Publications

That western and eastern songbird migration routes are distinct ecological systems has been proposed for over 100 years. Nonetheless, this distinction has not been widely recognized nor have there been any comparative studies that quantitatively evaluate the differences and similarities between western and eastern songbird migration systems. We drew from previously published research on wood warblers to highlight patterns in stopover ecology that suggest fundamental differences between western and eastern migrants. In particular, we compared biogeography, evolutionary relationships, and stopover ecology of wood warblers from western and eastern North America and found: (1) multiple lines of evidence that indicate western …

Geography Of Spring Landbird Migration Through Riparian Habitats In Southwestern North America, Susan K. Skagen, Jeffrey F. Kelly, Charles Van Riper Iii, Richard L. Hutto, Deborah M. Finch, David J. Krueper, Cynthia P. Melcher

Biological Sciences Faculty Publications

Migration stopover resources, particularly riparian habitats, are critically important to landbirds migrating across the arid southwestern region of North America. To explore the effects of species biogeography and habitat affinity on spring migration patterns, we synthesized existing bird abundance and capture data collected in riparian habitats of the borderlands region of the U.S. and Mexico. We determined the importance of geographic factors (longitude and latitude) in explaining variation in abundances and capture rates of 32 long-distance and three short-distance migrant species. Abundances and capture rates of 13 and 11 species, respectively, increased with increasing longitude, and four species' abundance and …

The Effect Of Scaling-Up On Remotely Derived Leaf Area Index Estimators In The Brazilian Amazon, John I. Menzies

All-Inclusive List of Electronic Theses and Dissertations

This research compared a traditional statistical technique with artificial neural networks to determine their effectiveness for modeling LAI in the Santarem region of the Brazilian Amazon. In addition, different satellite sensors in the form of ETM+, ASTER, MO DIS, and IKONOS were used to assess if spatial and spectral resolutions play a role in the ability to estimate LAI. This study focused on the following: (1) Determining if neural networks perform more accurately than multiple regression for LAI modeling (2) the effectiveness of different resolution satellite data including ETM+, ASTER, MODIS, and IKONOS for LAI estimation; (3) determining if spatial …

Agricultural Research Division News --June 2005

Agricultural Research Division: News and Annual Reports

Comments from the Dean- Darrell W. Nelson; ARD Internship Richard Ferguson; Strategic Planning in IANR; Sampson Range and Pasture Management Endowments; IANR Priority Goals 2005-2008; Anna Elliott Proposals; ARD Interdisciplinary Research Grants Program; Recognition of Junior Faculty for Excellence in Research; Layman Awards; ARD Advisory Council Election Results; Undergraduate Honors Research Program; William G. Whitmore Student Travel Endowment; David H. & Annie E. Larrick Fund 2005; ARD Web site has a “New Look” ; Revised UNL Commodity Board Guidelines; New or Revised Projects — March and April 2005; Proposals Submitted for Federal Grants —March and April 2005; Grants and Contracts …

Testing Species Disputes And Population Genetics In The Genus Phragmatopoma Using Molecular Characters, Carrie A. Drake

Biology

Phragmatopoma californica (found in the Pacific Ocean) and P. caudata (found in the Atlantic Ocean) are intertidal, marine reef-building polychaete worms that have been found to produce viable larvae in a laboratory setting, but are otherwise geographically isolated. The first study was aimed at determining their specific status by analyzing the DNA sequences of cytochrome c oxidase subunit I (COI) and the first internal transcribed spacer region (ITS-1). Phylogenetic analyses revealed that P. californica individuals shared no COI haplotypes or ITS-1 sequences with P. caudata individuals and formed well supported separate clades. The molecular data therefore supports the status of …

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.

Plant Adaptation Regions: Ecological And Climatic Classification Of Plant Materials, Kenneth P. Vogel, Marty R. Schmer, Robert B. Mitchell

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The effective use of plant materials for an array of objectives including conservation, restoration, renovation, landscaping, and bioremediation requires knowledge of the adaptation of each species and, more specifically, knowledge of the adaptation of cultivars, strains, accessions, or ecotypes of a species to specific sites or regions. For agronomic and horticultural plants, specific adaptation information has been and continues to be developed by extensive testing. Rangeland, grassland, park, and restoration project managers often lack the resources to determine adaptation areas for plant materials because of the large number of species that are used and the extensive geographical areas that are …

Pastoral Stock Water Workbook, T M. Sincliar, F A. Bright

Agriculture reports

The Pastoral Stock Water Workbook has been developed to assist you to estimate the costs of maintaining stock water and make informed decisions about managing existing and proposed water points. The first half of the Workbook provides background information on stock water points, their usage, advantages and disadvantages. Whilst the second part contains a series of stepby- step exercises that should be completed as you progress through the Workbook. The latter part of the Workbook aims to: • Show a worked example of the annual costs of maintaining water; • Provide tools to calculate water costs for your business; • …

New Technologies To Determine Solid Fat Content On-Line, Silvana Martini, Maria Lidia Herrera, Alejandro Marangoni

Nutrition, Dietetics, and Food Sciences Faculty Publications

The determination of solid fat content (SFC) is an important analytical procedure in the food industry. The most common way to determine SFC is by low-resolution pulsed NMR (p-NMR). Although this technique is very sensitive and easy to use, it has the disadvantage that it cannot be used for on-line measurements. The present work compares new technologies to determine SFC on-line. On-line ultrasonic spectroscopy and NMR-MOUSE (NMR mobile universal surface explorer) techniques were compared with off-line p-NMR measurements and there was a good correlation between the values obtained. Ultrasonic measurements accurately described the SFC variation, whereas NMR-MOUSE determinations need to …

Attenuation Of Ultrasonic Waves: Influence Of Microstructure And Solid Fat Content, Silvana Martini, Constantin Bertoli, Maria Lidia Herrera, Ian Neeson, Alejandro Marangoni

Nutrition, Dietetics, and Food Sciences Faculty Publications

Ultrasonic technology can be used to monitor the crystallization of fats and determine solid fat content (SFC) online. Ultrasonic waves are attenuated as crystals form and grow, and this attenuation occurs first at higher frequencies. The attenuation of the ultrasonic signal does not depend on the induction times of crystallization of the systems, or on their thermal behavior; but it does depend on SFC and on microstructure, particularly on the crystal size. At low SFC values (≈5%), bigger crystals generate more attenuation. At intermediate SFC values (≈10%), crystal size does not affect signal attenuation and SFC is the key factor …

Alternative Futures For The Bear River Watershed, Richard E. Toth

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The Bear River Watershed (BRW) is located in northeastern Utah, southeastern Idaho, and southwestern Wyoming. Over the three states the watershed encompasses an area of 7,500 square miles (4,800,000 acres). The Bear River 's headwaters begin at close to 13,000 feet in the High Uintas Wilderness Area of northeastern Utah. The course of the river follows a horseshoe pattern flowing north through Wyoming, Utah, and Idaho before bending south at Soda Springs. The river then meanders through the Gem and Cache Valleys before reaching its delta at the Great Salt Lake at an elevation of 4,211 feet.

2005 - The Tenth Annual Symposium Of Student Scholars

Symposium of Student Scholars Program Books

The full program book from the Tenth Annual Symposium of Student Scholars, held on April 8, 2005. Includes abstracts from the presentations and posters.

Facts From Faeces: Prey Remains In Wolf, Canis Lupus, Faeces Revise Occurrence Records For Mammals Of British Columbia’S Coastal Archipelago, Michael H. H. Price, Chris T. Darimont, Neville N. Winchester, Paul C. Paquet

Biogeography and Ecological Opportunity Collection

Archipelagos often harbour taxa that are endemic and vulnerable to disturbance. Conservation planning and research for these areas depend fundamentally on accurate and current taxonomic inventories. Although basic ecological information is in its infancy, the temperate rainforest islands of coastal British Columbia are undergoing rapid human-caused modification, particularly logging. We report herein new mammal records for these islands as determined by prey remains in the faeces of Wolves (Canis lupus), the area’s apex mammalian terrestrial predator. Of particular interest is our detection of Marten (Martes americana) on islands previously inventoried and island occupancy by Moose (Alces alces), which have apparently …

Phylogenetic Relationship Of Forest Spiny Pocket Mice (Genus Heteromys) Inferred From Mitochondrial And Nuclear Markers With Implications For Species Boundaries, Malinda Wallentine Gonzalez

Theses and Dissertations

I constructed a best estimate phylogeny based on congruence of multiple data sources. In recent years molecular data has been used both to construct phylogenies of taxonomic groups and to aid in the delimitation of new species. I generated and analyzed sequence data for forest spiny pocket mice (Genus Heteromys) for the mitochondrial gene cyt b (1143 bp) and two nuclear gene segments MYH2 (252 bp) and EN2 (189 bp). I used maximum parsimony and Bayesian analyses to infer relationships among species and to provide a framework for using a species delimitation method to investigate the possibility of multiple …

A Multidisciplinary Comparison Of Rules-Driven Writing: Similarities In Legal Writing, Biology Research Articles, And Computer Programming, Karen L. Koch

Journal of Legal Education

No abstract provided.

Phylogenetic History, Morphological Parallelism, And Speciation In A Complex Of Appalachian Salamanders (Genus: Desmognathus), Nathan D. Jackson

Theses and Dissertations

Understanding the mechanisms that generate shared morphologies across closely related taxa is important when identifying distinct evolutionary lineages using morphological characters. Desmognathus salamanders are an ideal group for testing hypotheses concerning the correlation between morphological similarity and genetic exchange within and among nominal species due to a pattern of high discordance between the two. Phylogeographic hypotheses are tested for populations of the D. quadramaculatus species complex throughout southern Appalachia by combining phylogenetic and population genetic methods with geographical information. Phylogenetic and phylogeographic inferences are then assessed in conjunction with morphological characteristics that have traditionally diagnosed taxonomic entities to understand the …

Nebraska's Endangered Species, Part 6: Threatened And Endangered Mammals, Patricia W. Freeman

University of Nebraska State Museum: Mammalogy Papers

Species discussed include:
black-footed ferrets (Mustela nigripes)
Black-tailed prairie dog
Southern flying squirrels (Glaucomys volans)
Eastern plains pocket mouse
Eastern plains harvest mouse
Long-legged myotis (Myotis volans)
Fringed myotis (Myotis thysanodes pahasapesis)
Townsend's big-eared bats (Corynorhinus townsendi)
swift fox (Vulpes velox)
nine-banded armadillo (Dasypus novemcinctus)
Black-tailed (Lepus californicus) and white-tailed jackrabbits (Lepus townsendi)
long-tailed weasels (Mustela frenata)
Richardson's ground squirrel (Spermophilus elegans)
northern pocket gopher (Thomomys talpoides chyennensis)
silky pocket mouse (Perognathus flavus)
bushy-tailed woodrat (Neotoma cinerea)
mountain lion (Puma concolor)
Merriam's shrew (Sorex merriami)
hispid cotton rat (Sigmodon hispidus)
Osage woodrat (Neotoma floridana osagensis)
spotted skunk (Spilogale putorius)
olive-backed …

Bearing The Costs Of Human-Wildlife Conflict: The Challenges Of Compensation Schemes, Philip J. Nyhus, Steve A. Osofsky, Paul Ferraro, H Fischer, Francine Madden

Faculty Scholarship

No abstract provided.

2005 International Pinot Noir Celebration Program, International Pinot Noir Celebration

Willamette Valley Archival Documents - IPNC

This document is the 2005 program for the International Pinot Noir Celebration (IPNC), held annually on the campus of Linfield College in McMinnville, Oregon. The program contains a detailed schedule of the celebration’s major events, presentations, and meals, as well as information regarding guest speakers, chefs, and artists visiting the campus. The program also includes a short description of all participating wineries for 2005, both foreign and domestic, along with a listing of the IPNC board of directors and all major supporters and contributors to the event.