Digital Commons Network^™

Sustaining Biological Diversity In Early Successional Communities: The Challenge Of Managing Unpopular Habitats, Robert A. Askins

Biology Faculty Publications

No abstract provided.

Temperature Effects On The Dynamics Of Aedes Albopictus (Diptera : Culicidae) Populations In The Laboratory, Barry W. Alto, Steven A. Juliano

Faculty Publications – Biological Sciences

We investigated how constant temperatures of 22, 24, and 26 degreesC experienced across the full life cycle affected the dynamics of caged populations of Aedes albopictus (Skuse). All cages were equipped with plastic beakers that served as sites for oviposition and larval development. We measured the per capita daily mortality and emergence rates of the adults and size of adult females, and estimated the intrinsic rate of increase (r) and asymptotic density (K) for each adult population. populations at 26 degreesC had greater intrinsic rates of increase and lower asymptotic densities than populations at 22 and 24 degreesC. Populations at …

Trichodesmium Spp.: Numerical Studies Of Resource Competition, Carbohydrate Ballasting, And Remote-Sensing Reflectance, Tonya Denise Clayton

OES Theses and Dissertations

In recent years, a new appreciation for the role of diazotrophy in the oceans has emerged. This dissertation reports on three modeling studies designed to investigate ecological processes associated with Trichodesmium spp., the most conspicuous marine diazotroph: (1) characterization of a generalized model Trichodesmium and issues of macronutrient resource competition; (2) carbohydrate ballasting by Trchodesmium and implications for the formation of surface accumulations; and (3) the vertical distribution of Trichodesmium and implications for detection from space.

The first study focuses on issues of nitrogen and phosphorus competition and ecosystem structure. It utilizes a simple ecosystem model that includes dissolved nitrogen …

Genetic Diversity And Camptothecin Variation In Camptotheca Decaisne, Yuiie Wang

Electronic Theses and Dissertations

Camptotheca Decaisne is the major source of the promising anti-cancer alkaloids camptothecins. The main objectives of this study are (1) to reveal the genetic diversity of Camptotheca and to identify taxa with RAPD markers; (2) to determine the camptothecin (CPT) variations within and among different populations and taxa, with tissues, season, and age; and (3) to determine the effects of environmental stress on the camptothecin production in Camptotheca. RAPD markers provide a powerful tool for the identification of some populations (particularly cultivars) and the detection of genetic variation within Camptotheca. Three primers (OPA02, OPA03, and OPA04), generating 44 polymorphic bands …

Book Review Of "Ecology And Conservation Of Grassland Birds Of The Western Hemisphere", Eric K. Bollinger

Faculty Research & Creative Activity

This book review appeared in The Auk, Volume 118 No. 3 (July 2001).

Comparative Phylogeography Of Mesoamerican Highland Rodents: Concerted Versus Independent Response To Past Climatic Fluctuations, Duke S. Rogers, Jack Sullivan, Elizabeth Arellano

Faculty Publications

The phylogeography of Sumichrast's harvest mouse (Reithrodontomys sumichrasti) was examined through maximumlikelihood and parsimony analyses of 1,130 bp of mitochondrial Cytochrome b sequence data from 43 individuals. The phylogeography of this Middle American highland forest-dwelling species was compared to that previously published for the codistributed Aztec deer mouse complex (Peromyscus aztecus/Peromyscus hylocetes complex) in order to test competing hypotheses of concerted versus independent responses of codistributed forms to past climatic fluctuations. Qualitatively, there were strong similarities in the phylogeographic patterns of the two groups, yet there were also areas of incongruence. Likelihood-ratio tests (Kishino-Hasegawa-Templeton and parametric bootstrap tests) indicated that …

Clarification Of And Comments On Northern Speyeria Hydaspe Subspecies (Lepidoptera: Nymphalidae), Norbert G. Kondla

The Taxonomic Report of the International Lepidoptera Survey

The geographic distribution and use of three northern Speyeria hydaspe subspecies names is reviewed. This is necessary due to literature errors about the type locality of subspecies rhodope (Edwards, 1874). The correct placement of the rhodope type locality renders the name S. hydaspe sakuntala (Skinner, 1911) of interior British Columbia as a junior synonym of S. hydaspe rhodope. The name S. hydaspe minor (McDunnough, 1927) is available for the coastal populations by those who recognize these as different from those of the interior.

Biodiversity: The World Of Life, Charles H. Smith

DLPS Faculty Publications

No abstract provided.

Kentucky Warbler (Vol. 77, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Estimation Of Forest Stand Parameters And Application In Classification And Change Detection Of Forest Cover Types In The Brazilian Amazon Basin, Dengsheng Lu

All-Inclusive List of Electronic Theses and Dissertations

This research focuses on measurement of forest stand parameters using remote sensing which is applied to classification and change detection of tropical successional and mature forests in selected areas in the Brazilian Amazon Basin. Three study areas, Altamira, Bragantina, and Pedras, each with different biophysical environments, were selected for this research. Previous research has indicated that relationships between selected stand parameters and remotely sensed data are not clearly understood, especially in tropical areas. Rarely has remote sensing research been successfully conducted in quantitative estimation of forest stand parameters (e.g. biomass) and identification of vegetation growth stages. In this research, atmospherically …

Phylogenetic Relationships, Taxonomy, And Evolution Of Host Choice In Diadasia (Hymenoptera: Apoidea), Sedonia D. Sipes

Biology

I examined the phylogenetic relationships, taxonomy, and evolution of host choice in Diadasia, a genus of New World bees. Diadasia species are particularly interesting because they are considered pollen specialists. Females of each species are believed to provision their nests with pollen from only a few closely related plant taxa. At the same time, the choice of floral hosts within the genus is diverse, and includes five distantly related plant families: Malvaceae, Onagraceae, Convolvulaceae, Asteraceae, and Cactaceae. To estimate phylogenetic relationships within this group, I sequenced ~ 2 kb of the mitochondrial genes CO I and II and tRNA …

Benthic Invertebrate Assemblage Structure In Mountain Streams: The Influence Of Spatial Scale Of Observation And Organism Size On Relationships With Environmental Factors, James N. Hogue

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The description of pattern in nature depends on the size and scale of both the observer and the phenomena being observed. The relative influence that different environmental factors have on organism distributions depends not only on scales of variation inherent to each factor, but also on the size and scale of the organisms. 

I used data from 649 sites within 45 mountain streams in California to quantify relationships between environmental factors and organism distribution. I compared these relationships across analyses conducted at different spatial and biotic scales of resolution. I also examined relationships between environmental variation and assemblage size structure …

Agenda: A Cartography Of Governance: Exploring The Province Of Environmental Ngos, University Of Colorado Boulder. School Of Law, University Of Colorado Boulder. Environmental Program, University Of Tulsa. National Energy-Environment Law & Policy Institute, University Of Colorado Boulder. United Government Of Graduate Students

A Cartography of Governance: Exploring the Province of Environmental NGOs (April 7-8)

Presented by: the Colorado Journal of International Environmental Law and Policy on April 7 & 8, 2001. Symposium director: Lakshman D. Guruswamy.

Co-sponsored by: University of Colorado School of Law, University of Colorado Environmental Program, University of Tulsa National Energy-Environment Law and Policy Institute, University of Colorado United Government of Graduate Students.

The papers and edited proceedings of the conference will be published in a special symposium issue of the Colorado Journal of International Environmental Law & Policy (CJIELP).

"The first objective of the Symposium was to understand and explore the growing importance of nongovernmental actors, and delineate the manner …

2001 - The Sixth Annual Symposium Of Student Scholars

Symposium of Student Scholars Program Books

The full program book from the Sixth Annual Symposium of Student Scholars, held on March 30, 2001. Includes abstracts from the presentations and posters.

Sfa Gardens Newsletter, Mar 2001, Sfa Gardens, Stephen F. Austin State University

SFA Gardens Newsletters

No abstract provided.

Management Of Soil Organic Matter And Gypsum For Sustainable Production In The Carnarvon Horticultural District Of Western Australia, R.S.B. Greene, A.J. Lin, D. C. Parr

Agriculture reports

Soil quality is critically important for the long-term production of high quality and high yielding fruit and vegetable crops in the Carnarvon horticultural district of Western Australia. A stable soil structure is essential for good soil quality.

Tiger Restoration In Asia: Ecological Theory Vs. Sociological Reality, Ronald Tilson, Philip J. Nyhus, Neil Franklin

Faculty Scholarship

No abstract provided.

Development, Testing, And Implementation Of The Temple-Inland, Inc. Sustainable Forest Management System (Tinsms), 2001, Arthur Temple College Of Forestry And Agriculture

eBooks

No abstract provided.

Geospatial Analysis Of Reflectance And Ndvi Values In The Angelina Forest Ecosystem, Peter P. Siska, I-Kuai Hung

Faculty Presentations

The aerial photographs and subsequently remote sensed imagery have been used for decades in classified landcover mapping, forest inventory, management, and evaluation of renewable resources. However, the implementation of geostatistical methods in remote sensing is of a newer date. In this study the variogram modeling is used to analyze the spatial structure of a forest canopy. The biomass and wood production can be evaluated in the studied area using NDVI (normalized difference vegetation index) values and kriging. The study area is located within the Angelina National Forest in the Neches River Basin. The Angelina Forest is an important part of …

Geospatial Analysis Of Reflectance And Ndvi Values In The Angelina Forest Ecosystem, I-Kuai Hung

Faculty Presentations

The aerial photographs and subsequently remote sensed imagery have been used for decades in classified landcover mapping, forest inventory, management, and evaluation of renewable resources. However, the implementation of geostatistical methods in remote sensing is of a newer date. In this study the variogram modeling is used to analyze the spatial structure of a forest canopy. The biomass and wood production can be evaluated in the studied area using NDVI (normalized difference vegetation index) values and kriging. The study area is located within the Angelina National Forest in the Neches River Basin. The Angelina Forest is an important part of …

The Forester's Dilemma : Paradoxes In The Criteria And Indicators For Sustainable Forestry, Theodore E. Howard

New Hampshire Agricultural Experiment Station Publications

Since sustainable forestry is a complex endeavor, paradoxes naturally exist in the certification criteria and indicators. There are different ways to establish the sustainability horizon and alternative harvest profiles that, although sustainable, may not meet specific criteria. The application of historic range of variation data and criteria must confront issues of time and spatial scales as well as how much human disturbance is natural. Defining “local” in the bioregional context is important for addressing socioeconomic criteria. The forester’s ability to deal with the self-contradictions in the criteria and indicators of sustainable forestry will improve with experience in the certification process.

Ethnic Differences In Risk From Mercury Among Savannah River Fishermen, Joanna Burger, Karen F. Gaines, Michael Gochfeld

Faculty Research & Creative Activity

Fishing plays an important role in people's lives and contaminant levels in fish are a public health concern. Many states have issued consumption advisories; South Carolina and Georgia have issued them for the Savannah River based on mercury and radionuclide levels. This study examined ethnic differences in risk from mercury exposure among people consuming fish from the Savannah River, based on site-specific consumption patterns and analysis of mercury in fish. Among fish, there were significant interspecies differences in mercury levels, and there were ethnic differences in consumption patterns. Two methods of examining risk are presented: (1) Hazard Index (HI), and …

Remote Estimation Of Vegetation Fraction In Corn Canopies, D. Rundquist, Anatoly A. Gitelson, D. Derry, J. Ramirez, R. Stark, Galina P. Keydan

School of Natural Resources: Faculty Publications

The aim of the paper was to test two new techniques that make use of channels in the visible range of the spectrum only to estimate vegetation fraction in corn canopies. High spectral resolution radiometers were employed to measure spectral reflectance, and the information content of spectra was investigated. Radiances in spectral channels of MODIS and MERIS were used to calculate Visible Atmospherically Resistant Indices, VARI_green=(R_green- R_red)/(R_green+R_red-R_blue) and VARI₇₀₀=(R₇₀₀-1.7*R_red+0.7*R_blue)/(R₇₀₀+2.3*R_red-1.3*R_blue). The indices allowed for estimation …

Is There A Place In The World For Zoos? / Another View Of Zoos, David Hancocks, Richard Farinato

State of the Animals 2001

We human animals make rapid technological and cultural advancements because we have the ability to pass definitive information to succeeding generations. But we also accept too much from the past without challenge. The good, the bad, and the indifferent are muddled together, accumulating in layers that smother each succeeding age. Cultural mores ranging from the silly to the profane, from charming to dangerous, clutter our world. They exist only because, as the British are wont to say, “We have always done things this way.” One very troubling example is the public zoological parks found in almost every city: they are …

Urban Wildlife, John Hadidian, Sydney Smith

State of the Animals 2001

Despite the potential for difficulty, there are several reasons why urban wildlife should be valued and better understood. First is its scientific and heuristic value. Urban wildlife populations are essentially parts of ongoing natural experiments in adaptation to anthropogenic stress. How urban animals are affected by human activities— and how they cope with them— can represent, on a highly accelerated scale, a model of what is happening to species in other biomes. No other wild animals live in such intimate contact and under such constant constraint from human activities as do synanthropes. Second, urban animals are exposed to many environmental …

Urban Wildlife Control: It Starts In Our Own Backyard, John Hadidian

Conservation Collection

No abstract provided.

Monitoring Large Areas For Forest Change Using Landsat: Generalization Across Space, Time And Landsat Sensors, Curtis E. Woodcock, Scott A. Macomber, Mary Pax-Lenney, Warren B. Cohen

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

Landsat 7 ETM+ provides an opportunity to extend the area and frequency with which we are able to monitor the Earth’s surface with fine spatial resolution data. To take advantage of this opportunity it is necessary to move beyond the traditional image-by-image approach to data analysis. A new approach to monitoring large areas is to extend the application of a trained image classifier to data beyond its original temporal, spatial, and sensor domains. A map of forest change in the Cascade Range of Oregon developed with methods based on such generalization shows accuracies comparable to a map produced with current …

Models For The Adaptive Harvest Management Of Rocky Mountain Sandhill Cranes: Problems And Potential, William L. Kendall, Roderick C. Drewien

Proceedings of the North American Crane Workshop

The migratory Rocky Mountain Population (RMP) of the greater sandhill crane (Grus canadensis tabida) breeds primarily in river valleys, marshes, and meadows of western Montana and Wyoming, southeastern Idaho, northern Utah, and northwestern Colorado. The RMP winters primarily in the Middle Rio Grande Valley of New Mexico, with smaller concentrations in the southwestern parts of that state, southeastern Arizona, and the northern highlands of Mexico. The San Luis Valley of Colorado is used as a stopover in both the spring and fall migrations. The RMP has been hunted on a permit basis since 1981, and currently these cranes …

Multiple Spatial Scale Analysis Of Whooping Crane Habitat In Nebraska, Amy L. Richert, Kevin E. Church

Proceedings of the North American Crane Workshop

Geographic Information System (GIS) and remote sensing technologies were used to evaluate whooping crane stopover habitat in Nebraska. The goal of the research was to investigate habitat selection at multiple spatial scales. The GIS database consisted of all confirmed whooping crane sightings reported in Nebraska from 1975-1996 and land cover information delineated from color infrared aerial photographs and Landsat Thematic Mapper data. Results suggest that whooping cranes select roost habitat by recognizing site-level and landscape-scale land cover composition. Wetland is the most strongly selected habitat type at all spatial scales examined. This presentation emphasizes methods used to analyze habitat selection …

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