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Integrating Gis And Remote Sensing With Ecosystem Research, Suzanne Wiley, Robert C. Weih Jr.

Journal of the Arkansas Academy of Science

In the Phase II Ecosystem Management Research Program in the Ouachita and Ozark National Forests, an interdisciplinary group of scientists are evaluating the effects and trade-offs of partial cutting methods in a replicated stand level study. Information from approximately 2,000 plots is being collected by more than fifty researchers during this five-year project with plans to continue data collection long term. To evaluate the effects of different management strategies and their interactions with forest resources, data must be brought into a common format and made available to all researchers. To this end, a data support system was developed which utilizes …

Parasite Biodiversity And Emerging Pathogens: A Role For Systematics In Limiting Impacts On Genetic Resources, Eric P. Hoberg

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Emergence of pathogenic organisms continues as a threat to overall biodiversity and genetic resources. Macroparasites including helminths constitute a potential threat to economically important resources in agriculture and conservation biology. Limitation of this threat can be achieved through survey and inventory for biodiversity and the application of systematics to understand the host range , biogeography and history of faunas. Systematics constitutes the foundation for recognition of endemic and introduced elements of faunas and the basis for predicting the behavior of pathogens introduced to new ecological settings or host groups. The basis for emergence of pathogens has both a deep historical …

The Birds Of Perth's Urban Parks : Factors Influencing Their Distribution And Community Attitudes Towards Them, Jodi S. Mansell

Theses : Honours

Knowledge of the general responses of bird populations to urbanisation and an understanding of their habitat requirements is necessary to ensure the continuation of bird life in urban areas. Most of the literature on urban birds around the world has concentrated on birds in streets and remnant patches. Urban parks provide much potential habitat for birds, although there are few publications addressing this issue. The aims of this project were to determine the terrestrial avifauna of Perth's northern suburban parks, investigate physical factors that might influence the distribution of birds, and determine the attitudes of park users towards birds in …

A Study Of The Lichens At Rocky Branch Nature Preserve, Clark County, Illinois, Eric B. Grunder

Masters Theses

In 1971, a graduate student at Eastern Illinois University, James E. Wiedman, studied the lichen flora of Rocky Branch Nature Preserve, Clark County, Illinois. During his study he collected, identified, and recorded a total of 64 lichen species. Since 1971, Rocky Branch Nature Preserve has experienced a dramatic increase in use by people and a concomittant decline in the quality of lichen habitats. In order to assess the decline of suitable lichen habitats and the reduction of lichen species a second study of the lichens at Rocky Branch Nature Preserve was undertaken. As part of this study, ten habitat sites …

Biosystematics Of The Cotesia Flavipes Species Complex (Hymenoptera: Braconidae): Morphometrics Of Selected Allopatric Populations, Susan W. Kimani-Njogu, William A. Overholt, James Woolley, Annette Walker

All Peer-Reviewed Publications

Morphometric studies of allopatric populations of the Cotesia fiavipes species complex representing three putative species; C. flavipes Cameron, C. sesamiae (Cameron) and C. chilonis (Matsumura), were conducted. Sixteen characters were measured. Principal component analysis separated the complex into three somewhat overlapping groups that corresponded well with previous concepts of the species. Canonical variate analysis separated the complex into three distinct clusters with populations from Africa together, populations from Asia and the Neotropics forming a second cluster, and material from China and Japan forming a third cluster. The Mahalanobis squared distances between the three clusters were nearly equal. Results support recognition …

Geographic Variation In Host Selection Behaviour And Reproductive Success In The Stemborer Parasitoid Cotesia Flavipes (Hymenoptera: Braconidae), R. P.J. Potting, L. E.M. Vet, W. A. Overholt

All Peer-Reviewed Publications

Local parasitoid populations may be adapted to their sympatric major plant host complex. Parasitoid strains may thus differ in their propensity to search for a particular micro-habitat or host or they may differ in their physiological compatibility with particular plant or host species. Cotesiaflavipes Cameron, a larval parasitoid used worldwide in biological control against tropical stemborers, has a wide host range in diverse habitats. The existence of plant and/or host specific strains in C. flavipes has been postulated. To provide insight into the existence of strains in C. flavipes, we compared the plant/host complex selection behaviour, and physiological compatibility with …

The Evaluation Of Two Types Of Multivariate Analyses Applied To Grassland Vegetation Data From A Reclaimed Coal Mine Area In Southeast Kansas, Usa, Karen Frances Yates

Electronic Theses & Dissertations

This study presents an analysis of the use of classification and ordination techniques for the detection of sub-communities at a reclaimed coal refuse dump and strip minded area in southeast Kansas. Cover values for 58 grass, forb, and woody species were estimated in 103 systematically positioned plots across the reclamation grassland using the modified Daubenmeyer cover scale. The data were submitted to an array of default and variant classification and ordination analysis programs in order to assess their ability to detect sub-communities. The classifications obtained from the analyses were mapped and analyzed for differences in species composition, diversity, and spatial …

A Scanning Electron Microscopy Study Of Taxus Leaves As Related To Taxonomy, G.A. Strobel, W. M. Hess

Scanning Microscopy

Scanning electron microscopy, when applied to the surfaces of the needles of Taxus spp. (yew) revealed features that appear useful in the taxonomy of this tree species which yields the important anticancer drug, taxol. For instance, all of the four North American species have 3-5 rows of stomata on one-half of the abaxial leaf surface, whereas all of the others, including those from Europe and Asia, have 7-10 rows of stomata. The appearance of individual or fused papilliform epidermal cells and their arrangement on the leaf surface also is a feature that varies between species. Patterns of wax formation appeared …

Fire Management Of Spinifex Pastures In The Coastal And West Pilbara, John Stretch

Agriculture reports

Spinifex dominated plant communities are a major natural pasture resource in the Pilbara. Spinifex is noted for its ridged, hard and generally sharp pointed leaf blades, although individual species vary in this respect. Triodia pungens and T. schinzii are often referred to as soft spinifex. Soft spinifex is useful as stock feed in its own right, whereas 'hard' spinifex species are rarely grazed by stock. Soft spinifex dominated pastures are relatively uncommon in eastern parts but important on the western coastal plains of the Pilbara (Figure 1). Information on spinifex management options available to the pastoralist or station manager is …

Reflections From The Seventh American Forest Congress: Some Thoughts For National Forest Management, William R. Bentley

The National Forest Management Act in a Changing Society, 1976-1996: How Well Has It Worked in the Past 20 Years?: Will It Work in the 21st Century? (September 16-18)

21 pages.

Contains endnotes and references.

Bringing The Aquatic Sciences Into Nfma Framework: Will They Fit?, James Sedell, Kelly Burnett

The National Forest Management Act in a Changing Society, 1976-1996: How Well Has It Worked in the Past 20 Years?: Will It Work in the 21st Century? (September 16-18)

21 pages.

Contains 3 pages of references.

1: "To Know Ourselves", The U.S. Department Of Energy, The Human Genome Project

Genomics: Past & Future

AT THE END OF THE ROAD in Little Cottonwood Canyon, near Salt Lake City, Alta is a place of near-mythic renown among skiers. In time it may well assume similar status among molecular geneticists. In December 1984, a conference there, co-sponsored by the U.S. Department of Energy, pondered a single question: Does modern DNA research offer a way of detecting tiny genetic mutations—and, in particular, of observing any increase in the mutation rate among the survivors of the Hiroshima and Nagasaki bombings and their descendants? In short the answer was, Not yet. But in an atmosphere of rare intellectual fertility, …

The Method Of Radicle Emergence In Phytolacca Americana (Pokeweed), Staci A. Van Winkle

Honors Theses

Germination is a key element in the development of a plant. This process encompasses several stages, one of which is the elongation of the radicle tip. This process has been noted to occur by different methods such as rapid mitotic division or cell elongation. However, such a mechcmism has not been studied in Phytolacca americana (pokeweed). It was the intention of this study to observe at the cellular level the nature of the Phytolacca americana radicle during normal germination. This was done using a routine histological microtechnique which involves embedding in paraffin and sectioning with a microtome. The sections were …

Temperature-Driven Variation In Substrate Oxygenation And The Balance Of Competition And Facilitation, Ragan M. Callaway, Leah King

Biological Sciences Faculty Publications

Emergent wetland plants often alleviate the effects of anaerobic soils on root respiration by passively transporting oxygen belowground through continuous air spaces (aerenchyma) in leaves and roots. Oxygen leaked from the roots into the rhizosphere may oxidize minerals in the soil or become available to other plants. Some spatial patterns in marsh plant communities suggest interspecific facilitative interactions, but there is little experimental evidence for interplant facilitation via soil oxygenation. We investigated the capability of the widespread, highly aerenchymous wetland plant, Typa latifolia, to aerate sediments and affect the growth of two non—aerenchymous neighbors, Salix exigua and Myosotis laxa, both …

Molecular Systematics Of The Fruit Bat, Artibeus Jamaicensis: Origin Of An Unusual Island Population, Dorothy E. Pumo, Iksoo Kim, James Remsen, Carleton J. Phillips, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

DNA sequences from mitochondrial tRNA genes, the light strand replication site, and a region of the 12s rRNA gene were used to test the hypothesis that the unusual Antillean island subspecies, Artibeus jamaicensis schwartzi, was derived from a South American origin. Parsimony and bootstraping analyses allied the mitochondrial genome in these bats with mitochondrial DNA (mtDNA) isolated from Artibeus planirostris living in French Guiana rather than with mtDNA isolated from Artibeus jamaicensis from the Antilles or Mexico. Although the tRNA sequences differed slightly, the 12s rRNA sequences were identical in mtDNA isolated from A. j. schwartzi on St. Vincent …

Obituary: J. Knox Jones, Jr., 1929-1992, James S. Findley, Clyde Jones, Hugh H. Genoways, Elmer C. Birney, Robert J. Baker

University of Nebraska State Museum: Mammalogy Papers

J. Knox Jones, Jr., was born in Lincoln, Nebraska, March 16, 1929, the eldest of the three sons of Virginia Bowen Jones and James Knox Jones. Knox passed away at his home in Lubbock, Texas, on November 15, 1992, after a two-year battle with cancer.

Selecting Wilderness Areas To Conserve Utah's Biological Diversity, Diane W. Davidson, William D. Newmark, Jack W. Sites Jr., Dennis K. Shiozawa, Eric A. Rickart, Kimball T. Harper, Robert B. Keiter

Great Basin Naturalist

Congress is currently evaluating the wilderness status of Bureau of Land Management (BLM) public lands in Utah. Wilderness areas play many important roles, and one critical role is the conservation of biological diversity. We propose that objectives for conserving biodiversity on BLM lands in Utah be to (1) ensure the long-term population viability of native animal and plant species, (2) maintain the critical ecological and evolutionary processes upon which these species depend, and (3) preserve the full range of communities, successional stages, and environmental gradients. To achieve these objectives, wilderness areas should be selected so as to protect large, contiguous …

Santa Clara Magazine, Volume 38 Number 2, Spring 1996, Santa Clara University

Santa Clara Magazine

10 - IT CHANGED MY LIFE Reflecting on 30 years of the Santa Clara Communiry Action Program, former SCCAP directors recount what participating in the organization meant to them.

14 - ATTICUS An excerpt from the recent novel by SCU's new Gerard Manley Hopkins, S.)., Professor in Arts and Humanities. By Ron Hansen M.A. '95

22 - LOST IN CYBERSPACE Universities debate Internet addiction among students: Should we stop them before rhey surf again? By Jeff Brazil '85

28 - THE GRAPES OF WRATH: PART II Professor of Modern Languages Francisco Jimenez '66 remembers his childhood as a migrant laborer, …

Esperance Region Catchment Planning Strategy, John Platt, Brendan Nicholas, Rod Short, Stephen Gee

Natural resources published reports

The Esperance Region Catchment Planning Strategy project was initiated by the Esperance Land Conservation District Committee.

This report provides a reference document for farmers and other land managers such as government agencies and local government, and should help them to strategically focus their catchment planning activities.

It will help land managers to identify the major catchments and land systems in their area, management issues for long term sustainability, and a regional strategy for catchment planning.

Catchment planning involves both technical and social processes.

Technically it is a process of planning the sustainable use of water resources within a catchment.

Cultural Values Lower Redwood Creek, Susie Van Kirk

Susie Van Kirk Papers

Levee construction on lower Redwood Creek from near its mouth to the mouth of Prairie Creek was completed by the Corps of Engineers in 1968, resulting in significant impairment of the estuary's hydrology and its biological functions. In an effort to reestablish those functions and more particularly the fisheries of the creek, Redwood National and State Parks is developing a plan for estuary management. The following general statement about cultural values in the project area and vicinity was prepared to expand the historical information in the draft plan.

Urinary Stone Proteins: An Update, J. P. Binette, M. B. Binette, M. A. Gawinowicz, N. Kendrick

Scanning Microscopy

The discovery of an organic component in kidney stones dates back to 1684. More than 150 years elapsed before the incrustation of this organic component, which is now called the matrix, was proposed as the mechanism of stone formation. The composition of the matrix remained largely unknown until the development of electron microscopy and the advances in biochemistry combined in the 1950's to usher in the modern era of renal stone matrix investigation. Composed mainly of selectively incorporated proteins generally characterized by high glutamic and aspartic acid content and the frequent occurrence of y-carboxyglutamic acid, the matrix dis-plays a variable …

A Lighter Shade Of Green: Reproducing Nature In Central Florida, Kevin Archer

All Faculty Scholarship for the School of Graduate Studies and Research

No abstract provided.

Cyanonews (Vol. 12, No. 2, July 1996), Jeff Elhai

CyanoNews

CyanoNews was a newsletter that served the cyanobacteriological community from 1985 to 2003, with content provided by readers (sort of a blog before there were blogs). The newsletter reported new findings from the lab, summaries of recent meetings (often provided by graduate students and post-docs entering the field), positions sought or available, life transitions, a compendium of recent cyanobacteria-related articles, and other items of interest to those who study cyanobacteria.

Floristics, Plant Community Structure And Bank Profiles, For Five Sites Along The Middle Ohio River, Amy Nicole Morris

Theses, Dissertations and Capstones

Plant community structure, floristics, and bank profiles for five sites along the middle Ohio River were described. Values obtained were compared with a similar study by Clagg and Mills in 1978 on four of the five sites. A total of 186 plant species was observed in the plant community and floristic study. Glenwood Bend had the greatest diversity with 109 plant species. Mason-Pomeroy had the lowest diversity with only 35 plant species. Six species, representing 3.2 percent of the total observed number of species, were present at all five sites. The majority of species, 51 percent, were present at only …

Professional Papers

Journal of the Minnesota Academy of Science

Abstracts from the Professional Papers given at the Annual Meeting for the Journal of the Minnesota Academy of Science.

Operational Control Of The Brown Tree Snake On Guam, Thomas C. Hall

Vertebrate Pest Conference Proceedings: 17th (1996)

An operational control program for brown tree snakes (Boiga irregularis) on Guam began in April 1993. The program focused on minimizing the dispersal of brown tree snakes to other Pacific islands and the U.S. mainland. During the first year of operation, more than 3,000 snakes were caught within a kilometer of high risk port facilities using traps, detector dogs, and spotlighting. Additionally, habitat modifications and prey-base removal were used to reduce the attractiveness of these facilities to brown tree snakes. Public awareness was also an important part of the program such as the education of cargo packers, shippers, …

Selection And Culture Of Landscape Plants In Utah, Larry A. Rupp, Dana Libbey

All Archived Publications

No abstract provided.

Temporal Dynamics Of Coastal Antarctic Phytoplankton: Environmental Driving Forces And Impact Of 1991/92 Summer Diatom Bloom On The Nutrient Regimes, Mark A. Moline, Barbara B. Prezelin, Oscar Schofield, Raymond C. Smith

Biological Sciences

Within the Palmer Long Term Ecological Research Program (PAL-LTER), a suite of environmental data sets were collected at a nearshore station throughout the 1991/92 austral summer. Seasonal changes are presented in the context of phytoplankton community ecology. Subseasonal fluctuations in sea-ice coverage, freshwater inputs, as well as wind driven and advective processes disrupting stratified surface waters, appeared to be the major driving forces affecting the timing, duration and demise of local phytoplankton blooms. During a large diatom-dominated bloom (~30 mg chl a m^-3), macronutrients were depleted to detection limits (NO₃^--3, PO₄^-3< 0.03 mmol m^-3) …

Population Structuring And Patterns Of Morphological Variation In Californian Styrax (Styracaceae), Peter Fritsch

Aliso: A Journal of Systematic and Floristic Botany

Recent studies of genetic variation within and among populations and phylogenetic estimates have provided evidence bearing on the evolutionary history and taxonomy of Styrax in California (S. redivivus). In this paper, data from these studies are further analyzed and integrated with new data from morphology to gain insight into the nature and taxonomic significance of character variation within this species. Six morphological characters thought to be important in the delimitation of infraspecific taxa within S. redivivus were measured on 52 herbarium specimens and analyzed with Pearson correlations and multivariate methods. Five characters are significantly associated with latitude and …

Nf96-265 Tornado Safety, Steven J. Meyer, Robert D. Grisso, David L. Morgan

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses tornado statistics, tornado identification, preparation for tornadoes, and how to develop a tornado safety plan.