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Trachelomonas Spp. And Other Euglenophyceae Taxa In A Southeastern Virginia Lake, Harold G. Marshall

Biological Sciences Faculty Publications

Trachelomonas species from Lake Kilby, a reservoir lake in southeastern Virginia are described with supportive electron micrographs. The most abundant Trachelomonas species were T. hispida and T. volvocina. Other members of the Euglenophyceae occurring in this lake are identified.

Fisheries Research Report No. 123 - Review Of Productivity Levels Of Western Australian Coastal And Estuarine Waters For Mariculture Planning Purposes, Alan Pearce, Stuart Helleren, Mark Marinelli, Fisheries Western Australia

Fisheries Research Reports

The measurement of chlorophyll-a (a simple estimate of phytoplankton biomass) is often used as an indicator of water quality. Chlorophyll measurements are relatively sparse for most of the Western Australian continental shelf, although there are areas such as the Perth metropolitan coastal zone, Wilson Inlet and the Albany harbours where some intensive studies have been undertaken.

This review of both published and unpublished chlorophyll concentrations in Western Australian waters has shown a high degree of variability in space (both horizontally and vertically) and time, and statistics on the seasonal distribution of chlorophyll have been derived for those regions with sufficient …

Marine Planktonic Archaea Take Up Amino Acids, Cleber C. Ouverney, Jed A. Fuhrman

Faculty Publications, Biological Sciences

Archaea are traditionally thought of as “extremophiles,” but recent studies have shown that marine planktonic Archaea make up a surprisingly large percentage of ocean midwater microbial communities, up to 60% of the total prokaryotes. However, the basic physiology and contribution of Archaea to community microbial activity remain unknown. We have studied Archaea from 200-m depths of the northwest Mediterranean Sea and the Pacific Ocean near California, measuring the archaeal activity under simulated natural conditions (8 to 17°C, dark and anaerobic) by means of a method called substrate tracking autoradiography fluorescence in situ hybridization (STARFISH) that simultaneously detects specific cell types …

Comparison Between Two Analytical Methods For Fecal Coliform Analysis In Natural Water: Membrane Filtration And Multiple Tube Fermentation, Mona M. Hafez

Theses & Honors Papers

This study compares two different analytical methods for the determination of coliform bacteria within natural waters. The two methods are: 1) membrane Filtration, and 2) multiple tube fermentation. Water samples from ten different locations within the Appomattox River watershed were collected by technicians from the Piedmont Soil and Water Conservation District and the Piedmont Region TMDL Initiative in Farmville, Virginia.

The Membrane filtration (MF) method utilizes m-FC broth to isolate and differentiate total fecal coliform bacteria (E.coli, Klebsiella, Pseudomonas) in natural water samples. A 1% dilution of each water sample is filtered through a 0.45 micron (um) Millipore filter …

A Review Of "Vanishing Borders: Protecting The Planet In The Age Of Globalization" By Hilary French: Implications For Peace, Ibpp Editor

International Bulletin of Political Psychology

This article reviews a recent book by Hilary French, vice president for research at the Worldwatch Institute.

An Unusual Pulse In Recruitment Of Two Reef Fishes In The Galápagos Islands Coincident With The 1997–1998 El Niño, Benjamin I. Ruttenberg

Biological Sciences

No abstract provided.

Regional Variation In Recruitment Of Hemlock Seedlings And Saplings In The Upper Great Lakes, Usa, Thomas P. Rooney, Ronald J. Mccormick, Stephen L. Solheim, Donald M. Waller

Biological Sciences Faculty Publications

Mature eastern hemlock–northern hardwood forest cover decreased drastically in the upper Midwest following European settlement and has yet to rebound substantially. Previous studies show that stands retaining substantial hemlock canopy coverage have low hemlock seedling and sapling densities. Results from various geographically restricted studies suggest several possible mechanisms that could cause low seedling or sapling density. We examined the relative importance of these proposed mechanisms in the Southern Superior Uplands Section of the Laurentian Forest Province. We surveyed 294- m2 plots in 100 hemlock stands in northern Wisconsin and western upper Michigan to assess how these proposed mechanisms affect the …

An Assessment Of The Intellectual Property Rights Provisions Of The Convention On Biological Diversity And The World Trade Organization Agreements, Joel Dantes Adriano

Graduate Student's Output

The study assesses the Intellectual Property Rights (IPR) provisions of the Convention on Biological Diversity (CBD) and the World Trade Organization (WTO) Agreements. It explains the conflict between the two agreements over IPR and attempts to answer how their differences may be best addressed.The study uses text interpretation, mainly hermeneutics which was originally used for theological studies but which is now an accepted method that emphasizes detailed examination of texts and meanings.The study finds three major areas where CBD and WTO IPR Agreements are not consistent with each other. These are through : (1) national sovereignty over biological resources, (2) …

Fisheries Research Report No. 120 - A 12-Month Survey Of Recreational Fishing In The Leschenault Estuary Of Western Australia During 1998, B E. Malseed, Neil R. Sumner, P C. Williamson

Fisheries Research Reports

A survey of recreational boat-based and shore-based fishing in the Leschenault Estuary was conducted between January 1998 and December 1998. The survey estimated the total annual boat-based recreational fishing effort as 33,392 fisher days, with 86% of this effort targeting blue swimmer crabs. The total annual shore-based recreational fishing effort was estimated to be 5,610 fisher days, with 88% of this effort targeting blue swimmer crabs.

The recreational blue swimmer crab catch from the Leschenault Estuary is substantial and exceeds the reported commercial catch. The estimated total recreational catch of blue swimmer crabs was 219,000 crabs or 45.7 tonnes. This …

Identification Of Fungal Pathogens Of Grasshoppers, M. J. Bidochka, Donald W. Roberts

Biology Faculty Publications

No abstract provided.

Responses Of Sphagnum And Carex Peatlands To Ultraviolet-B Radiation, And A Meta-Analysis Of Uv-B Effects On Vascular Plants, Peter S. Searles

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The severity of stratospheric ozone depletion in the temperate and polar latitudes has raised concerns about the sensitivity of terrestrial vegetation and ecosystems to solar ultraviolet (UV-B) radiation. This dissertation examined the responses of plants and microbes to solar UV-B for 3 years in Tierra del Fuego, Argentina (55° S). This region is under the influence of the Antarctic "ozone hole" during the austral spring. Additionally, a quantitative review of the UV-B literature was conducted using a set of statistical techniques known as meta-analysis.

For the field studies in Tierra del Fuego, plots were established in a Sphagnum moss peatland …

Program Abstracts, 112th Session, Iowa Academy Of Science, April 21-22, 2000, Iowa Academy Of Science

Iowa Academy of Science Documents

Presentation abstracts from the annual meeting of the Iowa Academy of Science

An Assay For The Estimation Of Organic Content In Unknown Biological Samples, William J. Schneider '00

Honors Projects

Potassium dichromate, in an acidic solution, will oxidize organic material. The reduction to the chromium ion is associated with a color change, which can be measured as a change in absorbance using a spectrophotometer. The degree of change is linearly related to the total energy contained in a sample and this information can be used to predict the energy content of unknown samples. However, the slopes of these relationships are significantly different for carbohydrates and proteins. It is hypothesized that these variations are due to differences in the reaction kinetics and that these differences can be used to predict the …

Urbanization Of Rural Landscapes Ii: Second Syllabus And Teaching Materials From A University Course, Spring 2000, Charles A. Francis, David Mortensen

CARI Extension and Education Materials for Sustainable Agriculture

Editors' Introduction and Executive Summary 2

Table of Contents 3

Other Volumes in Series and Ordering Information 4

Syllabus, Spring 2000 5

Principles of Planning for Lincoln and Lancaster County, Student Reports, 2000 9

Recommended Amendments to the 1994 Comprehensive Plan, Student Report, 1999 35

Course Evaluations, Spring 2000, by students and faculty evaluators 45

Resource Materials, some with Student Summaries (with permission of the publishers) 50

Stevens Creek study heralds new era for city, Lincoln Journal-Star 50

Developer, city closer on north Lincoln project, Lincoln Journal-Star 51

Study outlines new vision for Lincoln-Omaha corridor, Lincoln Journal-Star 53

Smart growth …

Green Sea Turtle (Chelonia Mydas) Hatchlings Success: The Effects Of Artificial Lights And Other Human Impacts, Hui-Yu Tracy Liang

UNLV Theses, Dissertations, Professional Papers, and Capstones

Sea turtles appeared more than 200 million years ago in the late Triassic period. They grow very slowly, taking an average of 25 years to reach sexual maturity, with a life span averaging 40-50 years. From May to October green sea turtles (Chelonia mydas) emerge during the night and follow light cues toward the sea. Recently, beachfront development has increased hatchling mortality rate. When hatchlings emerge from nest, high densities of artificial lights lead them toward the land where they either desiccate and die, or are preyed upon. Short-wavelength high intensity light and the distance of artificial light are the …

How Do We Know There Is A Population-Environment Problem?, Peter J. Taylor

Working Papers on Science in a Changing World

Five fictional friends of the author have agreed to meet and talk, hoping that he was right when he claimed that discussion crossing the usual boundaries of their fields would enrich their different inquiries and concerns. Ecolo, a natural and human ecologist, breaks the ice. He wants to marshall scientific knowledge to persuade others of the seriousness of the population problem. He is questioned by Philoso, whose philosophical bent leads her to observe the models that people use and to ask how they support the claims they make. In turn, the other three join in: Activo, an activist who is …

Life Stage Simulation Analysis: Estimating Vital-Rate Effects On Population Growth For Conservation, M. J. Wisdom, L. Scott Mills, D. F. Doak

Wildlife Biology Faculty Publications

We developed a simulation method, known as life-stage simulation analysis (LSA) to measure potential effects of uncertainty and variation in vital rates on population growth (lambda) for purposes of species conservation planning. Under LSA, we specify plausible or hypothesized levels of uncertainty, variation, and covariation in vital rates fur a given population. We use these data under resampling simulations to establish random combinations of vital rates for a large number of matrix replicates and finally summarize results from the matrix replicates to estimate potential effects of each vital rate on lambda in a probability-based context. Estimates of potential effects are …

Final Environmental Impact Statement - Iron Point Exploraton License - Iron Point Coal Lease Tract - Elk Creek Coal Lease Tract, Volume 2, United States Department Of Agriculture -- Forest Service, United States Department Of The Interior -- Bureau Of Land Management

Environmental Assessments (CO)

This appendix documents BLM and Forest Service activities to involve and consult with other government agencies and the public in the preparation of the Final EIS for the potential leasing of the Iron Point and Elk Creek Coal lease tracts, as well as the issuance of a coal exploration license for an area within and surrounding the Iron Point Coal lease Tract.

Cyanonews (Vol. 15, No. 1, July 2000), 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.

Developing Sustainable Management Policy For The National Elk Refuge, Wyoming, Tim W. Clark, Denise Casey, Anders Halverson

Yale School of the Environment Bulletin Series

No abstract provided.

Wildland Fire In Ecosystems Effects Of Fire On Flora, R. James Ansley, Stephen F. Arno, Brent L. Brock, Patrick H. Brose, James K. Brown, Luc C. Duchesne, James B. Grace, Gerald J. Gottfried, Sally M. Haase, Michael G. Harrington, Brad C. Hawkes, Greg A. Hoch, Melanie Miller, Ronald L. Myers, Marcia G. Narog, William A. Patterson Iii, Timothy E. Paysen, Kevin C. Ryan, Stephen S. Sackett, Dale D. Wade, Ruth C. Wilson

Joint Fire Science Program Synthesis Reports

This state-of-knowledge review about the effects of fire on flora and fuels can assist land managers with ecosystem and fire management planning and in their efforts to inform others about the ecological role of fire. Chapter topics include fire regime classification, autecological effects of fire, fire regime characteristics and postfire plant community developments in ecosystems throughout the United States and Canada, global climate change, ecological principles of fire regimes, and practical considerations for managing fire in an ecosytem context.

Crop Watch No. 2000-25, October 27, 2000, Lisa Brown Jasa

Crop Watch (1994–2005)

Crop Updates..........220

Ag Risk 2001..........221

Entomology Courses..........222

Irrigation Maintenance..........223

Irrigation Meetings..........224

Ag Prospectus..........225

Crop Rental Meetings..........226

Protecting Hay..........227

Corn/Soybean Expos..........228

Effect Of Potassium And Magnesium Fertilization On Yield And Nutrient Content Of Rice Crop Grown On Artificial Siltation Soil, Abdülreşi̇t Brahi̇, M. Rüştü Karaman, M. Turgut Topbaş, Ari̇f Aktaş, Erdi̇nç Savaşli

Turkish Journal of Agriculture and Forestry

The main purpose of this study was to determine the effect of potassium and magnesium fertilization on the yield and N, P, K, Mg, Fe, Cu, Zn, Mn contents of rice crop grown on soil used for cultivation after siltation from the Kelkit River. The experiment was carried out in a randomised block design with 4 replications, using Riba rice grown in pots containing 5 kg of soil. Potassium, K 2 SO 4 , at 0, 20, 40, 60 and 80 kg K 2 O/ha and magnesium, MgO, at 0, 20, 40, 60 and 80 Mg/ha were applied before sowing. …

Letter From The Dean, Charles J. Scifres

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Abstracts From The Student Presentations Of The Arkansas Chapter Of Gamma Sigma Delta, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 1 2000, Several Authors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Contents, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Instructions For Authors, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

Mapping The Boulder City Wetlands Using A Global Positioning System (Gps) And A Geographic Information System (Gis), Jennifer Lea Bishop

UNLV Theses, Dissertations, Professional Papers, and Capstones

The Boulder City Wetlands is a constructed wetlands park located in Boulder City, Nevada, approximately 23 miles southeast of Las Vegas, Nevada. Currently, a baseline study of water quality is being conducted in the Boulder City Wetlands. This baseline study of the wetlands is an important step in understanding the development of the Boulder City Wetlands over time. As wastewater is eventually introduced into the existing community tap water running through the wetlands, it is expected that the nitrogen within the water will enhance the growth of vegetation in the surrounding area. Comparing the vegetation growth over time is only …

Transactions Of The Nebraska Academy Of Sciences Table Of Contents: Volume 26 (2000)

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Editorial Contents

Nebraska Academy of Sciences Officers, Policy Committee .................... ii

Editorial Board .................... iv

Membership Objectives and Friends of the Academy .................... v

Nebraska Association of Teachers of Science .................... vi

Preparation of manuscripts .................... inside back cover

Papers

A floristic study and species checklist for the Republican River Valley in Nebraska, with emphasis on plants of concern for conservation (Steven J. Rothenberger) .................... 1

First record from Nebraska of the clam shrimp Eulimnadia diversa (Crustacea: Branchiopoda: Conchostraca) (David S. McLeod) .................... 17

Mitochondrial-DNA variation in pallid and shovelnose sturgeons, Scaphirhynchus (Pisces: Acipenseridae) (Richard Bischof and Allen L. Szalanski) …