Digital Commons Network^™

Uncertainties Of Monod Kinetic Parameters Nonlinearly Estimated From Batch Experiments, Chongxuan Liu, John M. Zachara

United States Department of Energy: Publications

Monod kinetic parameters (K_s, µmax, and Y) that are estimated from batch experimental data can have large uncertainties due to linear correlations between them. The degree of correlation and the resulting uncertainties of the Monod parameters are functions of the initial experimental conditions, the values of the parameters, the type and magnitude of measurement errors, and the sampling number. Careful manipulation of experimental conditions can reduce the correlations between Monod parameters allowing for the estimation of Monod kinetic parameters with the lowest degree of uncertainty. By dimensionless analysis, the correlation and relative standard deviations of Monod parameters …

Retroposon Analysis Of Major Cetacean Lineages: The Monophyly Of Toothed Whales And The Paraphyly Of River Dolphins, Masato Nikaido, Fumio Matsuno, Healy Hamilton, Robert L. Brownell Jr., Yin Cao, Wang Ding, Zhu Zuoyan, Andrew Shedlock, R. Ewan Fordyce, Masami Hasegawa, Norihiro Okada

United States Department of Commerce: Staff Publications

SINE (short interspersed element) insertion analysis elucidates contentious aspects in the phylogeny of toothed whales and dolphins (Odontoceti), especially river dolphins. Here, we characterize 25 informative SINEs inserted into unique genomic loci during evolution of odontocetes to construct a cladogram, and determine a total of 2.8 kb per taxon of the flanking sequences of these SINE loci to estimate divergence times among lineages. We demonstrate that: (i) Odontocetes are monophyletic; (ii) Ganges River dolphins, beaked whales, and ocean dolphins diverged (in this order) after sperm whales; (iii three other river dolphin taxa, namely the Amazon, …

First Finding Of The Amphipod Echinogammarus Ischnus And The Mussel Dreissena Bugensis In Lake Michigan, Thomas F. Nalepa, Don W. Schloesser, Steve A. Pothoven, Darryl W. Hondorp, David L. Fanslow, Marc L. Tuchman, Guy W. Fleischer

United States Department of Commerce: Staff Publications

The first finding of the amphipod Echinogammarus ischnus and the mussel Dreissena bugensis in Lake Michigan is documented. These two species are widespread and abundant in the lower lakes, but had not yet been reported from Lake Michigan. E. ischnus is generally considered a warmwater form that is typically associated with hard substrates and Dreissena clusters in the nearshore zone. Along the eastern shoreline of Lake Michigan, this species was present at rocky, breakwall habitats along the entire north-south axis of the lake. Although not abundant, this species was also found at soft-bottomed sites as deep as 94 m in …

Zebra Mussel (Dreissena Polymorpha) Selective Filtration Promoted Toxic Microcystis Blooms In Saginaw Bay (Lake Huron) And Lake Erie, Henry A. Vanderploeg, James R. Liebig, Wayne W. Carmichael, Megan A. Agy, Thomas H. Johengen, Gary L. Fahnenstiel, Thomas F. Nalepa

United States Department of Commerce: Staff Publications

Microcystis aeruginosa, a planktonic colonial cyanobacterium, was not abundant in the 2-year period before zebra mussel (Dreissena polymorpha) establishment in Saginaw Bay (Lake Huron) but became abundant in three of five summers subsequent of mussel establishment. Using novel methods, we determined clearance, capture, and assimilation rates for zebra mussels feeding on natural and laboratory M. aeruginosa strains offered alone or in combination with other algae. Results were consistent with the hypothesis that zebra mussels promoted blooms of toxic M. aeruginosa in Saginaw Bay, western Lake Erie, and other lakes through selective rejection in pseudofeces. Mussels exhibited high …

The Spatial Variability Of Energy And Carbon Dioxide Fluxes At The Floor Of A Deciduous Forest, Kell Wilson, Tilden Meyers

United States Department of Commerce: Staff Publications

Fluxes of carbon dioxide, water and sensible heat were measured using three different eddy covariance systems above the forest floor of a closed deciduous forest (leaf area index ≈ 6). The primary objective was to examine the representativeness of a single eddy covariance system in estimating soil respiration for time scales ranging from one-half hour to more than one week. Experiments were conducted in which the eddy covariance sensors were in one of three configurations: i) collocated, ii) separated horizontally or iii) separated vertically. A measure of the variation between the three systems (CV’, related to the coefficient …

Tsc13p Is Required For Fatty Acid Elongation And Localizes To A Novel Structure At The Nuclear-Vacuolar Interface In Saccharomyces Cerevisiae, Sepp D. Kohlwein, Sandra Eder, Chan-Seok Oh, Charles E. Martin, Ken Gable, Dagmar Bacikova, Teresa Dunn

Uniformed Services University of the Health Sciences

The TSC13/YDL015c gene was identified in a screen for suppressors of the calcium sensitivity of csg2Δ mutants that are defective in sphingolipid synthesis. The fatty acid moiety of sphingolipids in Saccharomyces cerevisiae is a very long chain fatty acid (VLCFA) that is synthesized by a microsomal enzyme system that lengthens the palmitate produced by cytosolic fatty acid synthase by two carbon units in each cycle of elongation. The TSC13 gene encodes a protein required for elongation, possibly the enoyl reductase that catalyzes the last step in each cycle of elongation. The tsc13 mutant accumulates high levels of long-chain bases …

Citizen Knowledge And Perception Of Black-Tailed Prairie Dog Management, Natalie R. Sexton, Ayeisha Brinson, Phadrea D. Ponds, Kurt Cline, Berton L. Lamb

United States Geological Survey: Publications

What do citizens know about black-tailed prairie dogs, and where do they get their information? When management decisions need to be made regarding an animal such as the black-tailed prairie dog, an understanding of the species and its relationship to humans is necessary. This includes knowing the biology of the animal, where it lives, and how it interacts with other animals. But it is equally important for those making decisions about the species to understand citizens’ knowledge and perceptions so managers can effectively communicate with the public and help the public participate in planning and decision making activities. Unfortunately, what …

Tws Wildlife Damage Management Working Group Newsletter: Spring 2001 – Volume 8(1) Elections Issue

TWS Wildlife Damage Management Working Group Newsletter

From The Chair: 2000-2001 Wildlife Damage Management Working Group Officers:; Candidates For The Working Group Officers – May 2001; Wildlife Damage Management Working Group Ballot – May 2001; Proceedings Available: Predator Control; A Quest For Older Wildlife Control Workshop Proceedings; Wdamage: A Resource For Wildlife Damage Managers; Tws Reno/Tahoe 2001 8th Annual Conference Of The Wildlife Society Reno/Tahoe, Nevada , September 25–29, 2001 Preliminary Program; Application For Membership / The Wildlife Society

Tws Wildlife Damage Management Working Group Newsletter: Late Summer 2001 – Volume 8(2)

TWS Wildlife Damage Management Working Group Newsletter

Forward -Bob Timm; New Jersey Polices Chief Prevents 15mm Launcher Use; Close Encounters Of Predator Kind Rising; Fecal Canada Goose Study Results Available; Special Prepublication Offer On New Human Dimensions Book; Tws Reno/Tahoe 2001 8th Annual Conference Of The Wildlife Society Reno/Tahoe, Nevada, September 25–29, 2001 Preliminary Program; Application For Membership / The Wildlife Society

Occurrence And Potential Adverse Effects Of Semivolatile Organic Compounds In Streambed Sediment, United States, 1992–1995, Thomas J. Lopes, Edward T. Furlong

United States Geological Survey: Staff Publications

The occurrence and potential adverse effects of select semivolatile organic compounds (SVOCs) in streambed sediment were assessed at 536 sites in 20 major river basins across the United States from 1992 to 1995. Fifty-six SVOCs were detected at one or more sites, and one or more SVOCs were detected at 71% of sites. The northeastern and Great Lakes regions and large metropolitan areas have the highest SVOC concentrations. Polycyclic aromatic hydrocarbons (PAHs) were detected most frequently and at the highest concentrations. Concentrations of PAHs and phthalates were about 10 times higher at sites influenced by urban activities than at sites …

Introduction: Fear And Loathing Of Evolutionary Psychology In The Social Sciences, Daniel Leger, Alan Kamil, Jeffrey A. French

Department of Psychology: Faculty Publications

When one looks at the intellectual landscape of the modern university, at the scholarly and scientific interests of its faculty, the panorama is seamless. There are no discontinuities. The interests of physicists transmogrify into those of chemists, those of chemists into those of biologists, and so on. The lines, the divisions, between departments have been created out of administrative, not intellectual, necessity.
For example, consider the divide between chemistry and biology. There is a set of chemical processes that are characteristic of living systems. Is the study of these processes chemistry or biology? This is a meaningless question. To be …

Center For Grassland Studies Newsletter, Winter 2001, Volume 7, No. 1

Center for Grassland Studies: Newsletters

Contents

Using the Nutritional Balance Analyzer (NUTBAL) Program to Track Crude Protein Values for Rangeland and CRP under Drought Conditions by Mary Schrader, Natural Resources Conservation Service

UNL Research Towards Biological Control of Turfgrass Diseases - Part II by Gary Yuen, Department of Plant Pathology, UNL

Nebraska Grazing Conference August 13-14

Natural Landscaping at City Library

2001-2002 Nebraska Ranch Practicum

USDA "PLANTS" Web Site

The Spatial Distribution Of Diversity Between Disparate Taxa: Spatial Correspondence Between Mammals And Ants Across South Florida, Usa, Craig R. Allen, L. G. Pearlstine, D.P. Wojcik, W.M. Kitchens

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Gap Analysis takes a proactive landscape-level approach to conserving native species by identifying nodes of high biological diversity. It uses vertebrate species richness as an index of overall biological diversity. However, it remains unknownwhether or not the spatial distribution of vertebrate diversity correspondswith the diversity of other taxa. We tested whether landscape-level diversity patterns corresponded between a vertebrate and an invertebrate taxon, mammals and ants, across the southern half of the Florida peninsula, USA. Composite digital maps with a 30-m spatial resolution were produced for each taxon. Spatial correspondence between the taxa was determined by normalizing and then subtracting the …

Manure Matters, Volume 7, Number 2, Rick Koelsch

Manure Matters (newsletter)

Pivot Irrigation of Livestock Manure
The selection of an appropriate land application method for manure can have an impact on several environmental issues. Individual methods should be evaluated based upon impact on:

• Air quality
• Water quality
• Soil conservation and quality
• Pathogen transmission

The following discussion will review these considerations as they relate to application of manure or lagoon effluent through a center pivot system. A generalized comparison of the relative strengths and weaknesses of alternative application methods is attached in Table 1.

Manure Matters, Volume 7, Number 10, Christopher Henry, Richard K. Koelsch

Manure Matters (newsletter)

What is an Anaerobic Digester?

The first methane digester plant was built at a leper colony in Bombay, India in 1859. A methane digester system, commonly referred to as an AD (anaerobic digester) is a device that promotes the decomposition of manure or “digestion” of the organics in manure to simple organics and gaseous biogas products. Manure is regularly put into the digester after which the microbes break down the manure into biogas and a digested solid. The digested manure is then deposited into a storage structure. The biogas can be used in an engine generator or burned in a …

Manure Matters, Volume 7, Number 9, Richard K. Koelsch, Bryan Woodbury, David Stenberg, Daniel N. Miller, Dennis Schulte

Manure Matters (newsletter)

Total Reduced Sulfur Concentration in Beef Cattle Feedlots

In 1997, the Nebraska Department of Environmental Quality amended its Title 129 Air Quality Regulations to establish a regulatory threshold for Total Reduced Sulfur (TRS) concentrations under ambient conditions. These thresholds are set at “10.0 parts per million (10.0 PPM) maximum 1 minute average concentration or 0.10 parts per million (0.10 PPM) maximum 30-minute rolling average”. Two agricultural regions of Nebraska with significant cattle finishing in open feedlots came under scrutiny for possible rule violations. In one situation, area feedlots were asked to prepare and implement a TRS control plan.

This growing …

2001 Pod Network Conference Attendees

Professional and Organizational Development Network in Higher Education: Conference Materials

No abstract provided.

Observations On Small Mammals Recovered From Owl Pellets From Nebraska, Jeffrey J. Huebschman, Patricia W. Freeman, Hugh H. Genoways, Jospeh A. Gubanyi

University of Nebraska State Museum: Mammalogy Papers

Mammalian remains from owl pellet material collected in 24 Nebraska counties were examined, A total of 1262 individual mammals was identified from all owl pellet material and included 19 identifiable species and 21 total genera. The most commonly consumed prey by owls across the state were Microtus (41 % of identifiable prey material), followed by Peromyscus (18%), and Reithrodontomys (11%). Significant locality information for the northern grasshopper mouse (Onychomys leucogaster), the southern bog lemming (Synaptomys cooperi), and the meadow vole (Microtus pennsylvanicus) are reported

Crop Watch No. 2001-4, April 6, 2001, Lisa Brown Jasa

Crop Watch (1994–2005)

Weed Guide..........32

Sprayer Nozzle Tips..........34

Surface Nitrogen..........35

Presetting Your Planter..........36

Weed Control in Trees..........36

Field Buffer Research..........37

Limiting Contamination..........38

Pine Tree Care..........39

Avoiding Compaction..........40

Development Of Hot/Cold Plate Apparatus For Determining Heat Transport Mechanisms In Mulch Materials, Simon Van Donk, Ernest W. Tollner, Stephen P. Mcdonald

West Central Research and Extension Center, North Platte

To study the effects of mulches and crop residues on soil temperature, researchers have frequently used simulation models. In such models, quantification of heat transport within the mulch material is often weak and heat transport mechanisms are poorly understood. In this paper we describe an apparatus to quantify heat transport through dry mulch materials. In addition, heat transport mechanisms (conduction, thermal radiation, free and forced convection) can be identified and quantified using this apparatus. The apparatus consists of precisely controlled and monitored 0.9 m by 0.9 m hot and cold plates. The hot plate actually consists of three component plates: …

Agricultural Research Division Annual Report 2001

Agricultural Research Division: News and Annual Reports

Table of Contents:

Our Mission ...................................................................................................... 2
Foreword.......................................................................................................... 3
Research Highlights........................................................................................... 4
Faculty Awards and Recognitions ........................................................................ 12
Graduate Student Awards and Recognitions ......................................................... 15
Undergraduate Honors Student Research Program ............................................... 18
Variety and Germplasm Releases ........................................................................ 19
Copyrights and Patents ...................................................................................... 25
Administration .................................................................................................. 26
Administrative Personnel .............................................................................. 26
Organizational Chart..................................................................................... 27
Administrative Units ..................................................................................... 28
IANR Research Facilities .............................................................................. 29
Faculty ............................................................................................................. 30
Agricultural/Natural Resources Units ............................................................. 31
Human Resources and Family Sciences Departments ...................................... 39
Off-Campus Research Centers ....................................................................... 40
Interdisciplinary Activities ............................................................................. 41
Visiting Scientists/Research Associates ................................................................. 42
Research Projects .............................................................................................. 47
Agricultural/Natural Resources Units ............................................................. …

The Probe, Issue 214 – January/February 2001

The Probe: Newsletter of the National Animal Damage Control Association

Trap-Shy Feral Cats in Public Settings -- Susan Darling Greene
Why Worry About Human-Wildlife Conflicts? -- Mike Conover, President, NADCA
Imunoconctraception For Deer Control Shown to Be Ineffective
The USDA announced a settlement that would extend protection under the Animal Welfare Act to rats, mice, and birds used in laboratory research.
The Internet Center for Wildlife Damage Management: ttp://wildlifedamage.unl.edu -- Dallas Virchow, Proj. Coord., Distance Ed., Wildlife Damage Management,University of Nebraska
U.S. Environmental Protection Agency (EPA) Region 5 has recently ordered New Tech International (Warren, MI) to stop selling the unregistered pesticide Kritter Killer.
Since all snakes lack external ears, …

Tests For Cognitive Mapping In Clark’S Nutcrackers (Nucifraga Columbiana), Brett M. Gibson, Alan Kamil

Papers in Behavior in Biological Sciences

In these experiments, the authors examined the nature of the spatial information that Clark’s nutcrackers (Nucifraga columbiana) use during navigation and whether this information is represented in the form of a cognitive map. In Experiment 1, nutcrackers were able to use distal cues to locate a small hidden goal. In Experiments 2 and 3, nutcrackers were given the opportunity to develop a map of a room by viewing local subsets of the landmarks in the room at a goal during training. During transfer tests, nutcrackers were presented with a landmark panorama that was not previously seen at the …

Construction Of A Derivative Of Agrobacterium Tumefaciens C58 That Does Not Mutate To Tetracycline Resistance, Zhao-Qing Luo, Thomas E. Clemente, Stephen K. Farrand

Nebraska Center for Biotechnology: Faculty and Staff Publications

Agrobacterium tumefaciens C58 mutates to tetracycline resistance at high frequency, complicating the use of many broad-host-range cloning and binary vectors that code for resistance to this antibiotic as the selection marker. Such mutations are associated with a resistant gene unit, tet_C58, that is present in the genome of this strain. By deleting the tet_C58 locus, we constructed NTL4, a derivative of C58 that no longer mutates to tetracycline resistance. The deletion had no detectable effect on genetic or physiological traits of NTL4 or on the ability of this strain to transform plants.

Fate Of The Survivors Of The 1995 And 1996 Arizona Trucking Migrations Of Costume-Reared Greater Sandhill Cranes, Daniel P. Mummert, David H. Ellis, Carol L. Chambers

Proceedings of the North American Crane Workshop

In 1995 and 1996, we trained 2 groups of costume-reared greater sandhill cranes (Grus canadensis tabida) (10 in 1995, 14 in 1996) to follow a truck. Thereafter we led 10 in 1995 and 12 in 1996 from Garland Prairie, northern Arizona, to the Buenos Aires National Wildlife Refuge, southern Arizona (ca. 620 km). These techniques were being developed to create additional, disjunct populations of the whooping crane (G. americana). The cranes taught the migration route in 1995 did not follow the desired migration route in 1996 but did travel north 140 km along the route in …

Results Of The First Ultralight-Led Sandhill Crane Migration In Eastern North America, Joseph W. Duff, William A. Lishman, Dewitt A. Clark, George F. Gee, David H. Ellis

Proceedings of the North American Crane Workshop

In 1997, we led 8 sandhill cranes (Grus canadensis) south from Ontario, Canada by ultralight aircraft to a wintering area near Warrenton, Virginia, an area without a wild population. Six others were transported south in a trailer in hopes they would return north with those that flew. The migration was 863 kIn long, included 14 stops, and took 21 days to complete. A1l13 SUIViving birds were wintered together. In March 1998, the surviving 7 "aircraft-led" birds departed the wintering site. The following day, 6 of the 7 were reported on the south shore of Lake Ontario. The flock …

Management Plan

National Invasive Species Council

Farmers, ranchers, scientists, State officials, and many others have urged the Federal Government to consider invasive species issues a priority and to develop a coordinated national effort to address the problem. In response, the President issued Executive Order 13112 on Invasive Species (Order) in February 1999. The Order established the National Invasive Species Council (Council), co-chaired by the Secretaries of Agriculture, Commerce, and the Interior; and includes the Secretaries of State, Treasury, Defense, and Transportation, and the Administrator of the Environmental Protection Agency. The Order directs the Council to form a non-Federal Invasive Species Advisory Committee (ISAC) to advise the …

Modeling Viable Mammal Populations In Gap Analyses, Craig R. Allen, L. G. Pearlstine

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Gap analysis is an approach to conserving biological diversity that maps species richness and identifies sites that ought to be protected but are not in conservation networks. Gap analyses based on species richness may have high error rates when species models are based solely on species-habitat association, because patches too small to support populations are still considered to be potential habitat. We incorporated information on the home range and dispersal distances of the mammals of Florida to estimate minimum critical areas (MCA) to support minimum viable populations for each mammal species. Incorporating MCA decreases the area occupied by the highest …

Potential Fire Ant (Hymenoptera: Formicidae) Impact On The Endangered Schaus Swallowtail (Lepidoptera: Papilionidae), Elizabeth A. Forys, Anna Quistorff, Craig R. Allen

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

The Schaus swallowtail, Papilio aristodemus ponceanus, historically occurred in tropical hardwood hammocks from South Miami to the upper Florida Keys and is currently listed as federally endangered. Much of the remaining hardwood hammock habitat is fragmented by roads and human development that may alter the microhabitat within the hammocks and increase the probability of invasion by non-native predators and competitors. One non-indigenous species that has recently invaded the Florida Keys, and that may impact the Schaus swallowtail is the red imported fire ant (Solenopsis invicta Buren). We estimated abundance of red imported fire ants in Schaus swallowtail habitat …

Potential Fire Ant (Hymenoptera: Formicidae) Impact On The Endangered Schaus Swallowtail (Lepidoptera: Papilionidae), Elizabeth A. Forys, Anna Quistorff, Craig R. Allen

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

The Schaus swallowtail, Papilio aristodemus ponceanus , historically occurred in tropical hardwood hammocks from South Miami to the upper Florida Keys and is currently listed as federally endangered. Much of the remaining hardwood hammock habitat is fragmented by roads and human development that may alter the microhabitat within the hammocks and increase the probability of invasion by non-native predators and competitors. One non-indigenous species that has recently invaded the Florida Keys, and that may impact the Schaus swallowtail is the red imported fire ant ( Solenopsis invicta Buren). We estimated abundance of red imported fire ants in Schaus swallowtail habitat …