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Articles 61 - 90 of 634
Full-Text Articles in Life Sciences
U.S. Drought Monitor, November 8, 2016, Deborah J. Bathke
U.S. Drought Monitor, November 8, 2016, Deborah J. Bathke
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for November 8, 2016 (11/8/16) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
Effects Of Antibiotic Mixtures Across Marine Intertidal Trophic Levels: Examining Environmentally-Relevant Contaminant Concentrations, Jaclyn Rebecca Teixeira
Effects Of Antibiotic Mixtures Across Marine Intertidal Trophic Levels: Examining Environmentally-Relevant Contaminant Concentrations, Jaclyn Rebecca Teixeira
Dissertations and Theses
Approximately 48% of Americans use prescription drugs within each 30-day period, and there are signs this trend is increasing. Although many studies track pharmaceuticals’ fates in contaminating waterways, only fairly recent efforts have examined the potential impacts of these drugs on non-target organisms. The antibiotics sulfamethoxazole and trimethoprim, often prescribed together to treat bacterial infections, have been detected worldwide in marine and estuarine environments at concentrations up to 700-800 ng/L each. Toxic effects of these drugs have been identified in freshwater organisms, with synergistic effects observed in short-term studies of mixtures of the two; however, little research has examined possible …
Ecological Consequences Of Lost Anadromous Forage Fish In Freshwater Ecosystems, Steven R. Mattocks
Ecological Consequences Of Lost Anadromous Forage Fish In Freshwater Ecosystems, Steven R. Mattocks
Masters Theses
Beginning in the early 1600s, dam construction in New England obstructed anadromous fish access to spawning grounds during migration. As a result, anadromous forage fish populations have declined, which has impacted freshwater, marine, and terrestrial ecosystems. To determine the impacts of dams on anadromous forage fish and freshwater ecosystems, I used historical and current data to estimate population changes in alewives (Alosa pseudoharengus) from 1600-1900. A significant reduction in spawning habitat occurred in New England as a result of 1,642 dams constructed between 1600 and 1900, resulting in 14.8% and 16.6% lake and stream habitat remaining by 1900, …
Adsorptive And Kinetic Characterization Of Aqueous Zinc Removal By Biochars, Sergio Mireles, Yongsik Ok, Chu-Lin Cheng, Jihoon Kang
Adsorptive And Kinetic Characterization Of Aqueous Zinc Removal By Biochars, Sergio Mireles, Yongsik Ok, Chu-Lin Cheng, Jihoon Kang
School of Earth, Environmental, and Marine Sciences Faculty Publications and Presentations
Biochars have shown a great potential to treat stormwater runoff contaminated with heavy metals due to their favorable physical and chemical characteristics. Biochar materials were produced from pyrolysis of oak tree and wood at 400C and 450C respectively, and their Zn adsorption behavior from aqueous solutions were evaluated to assess their applicability as a filter media for stormwater treatment. Two adsorption isotherm models, Freundlich and Langmuir, were used to fit the batch-scale experimental data. The kinetics of Zn adsorption was investigated under two contrasting physical condition (stagnant vs. agitated). The adsorption isotherm was better fitted with the Langmuir model (R2 …
Factors Affecting Habitat Quality For Wintering Wood Thrushes In A Coffee Growing Region In Honduras, Brett A. Bailey
Factors Affecting Habitat Quality For Wintering Wood Thrushes In A Coffee Growing Region In Honduras, Brett A. Bailey
Masters Theses
Amongst the diversity of taxa that occur in the Neotropics, 200 migratory bird species that breed in temperate North America can be found. Many of these populations have seen significant declines since the 1960s. The Wood Thrush, Hylocichla mustelina, is one such species. Shade coffee and other agroforestry practices show potential for benefiting migratory species, but the quality of coffee habitat and optimal habitat characteristics for Wood Thrushes remain unknown.
I surveyed a spatially complex, agricultural landscape in Honduras outside the recognized winter range of the Wood Thrush and radio-tagged 46 individuals within rustic coffee farms during the winters …
Influence Of Topography And Human Activity On Apparent In Situ 10be-Derived Erosion Rates In Yunnan, Sw China, Amanda H. Schmidt, Thomas B. Neilson, Paul R. Bierman, Dylan H. Rood, William B. Ouimet, Veronica Sosa Gonzalez
Influence Of Topography And Human Activity On Apparent In Situ 10be-Derived Erosion Rates In Yunnan, Sw China, Amanda H. Schmidt, Thomas B. Neilson, Paul R. Bierman, Dylan H. Rood, William B. Ouimet, Veronica Sosa Gonzalez
College of Arts and Sciences Faculty Publications
In order to understand better if and where erosion rates calculated using in situ 10Be are affected by contemporary changes in land use and attendant deep regolith erosion, we calculated erosion rates using measurements of in situ 10Be in quartz from 52 samples of river sediment collected from three tributaries of the Mekong River (median basin areaD46.5 km2). Erosion rates range from 12 to 209mm kyr-1 with an area-weighted mean of 117±49mm kyr-1 (1 standard deviation) and median of 74mm kyr-1.We observed a decrease in the relative influence of human activity from our steepest and least altered watershed in the …
Pepper Mild Mottle Virus As A Surrogate For Enteric Viruses: Implications For Assessing Water Quality, Erin Michelle Symonds
Pepper Mild Mottle Virus As A Surrogate For Enteric Viruses: Implications For Assessing Water Quality, Erin Michelle Symonds
USF Tampa Graduate Theses and Dissertations
Less than 10% of the world’s domestic wastewater is disinfected prior to discharge into surface waters; therefore, human exposure to diverse wastewater-related pathogens results in millions of cases of illness each year. Among the enteric pathogens, viruses represent an important group of emerging pathogens and are frequently the cause of food- and water-borne outbreaks of illness. Although the World Health Organization and many government agencies mandate the use of bacterial indicators to identify poor microbial water quality, it is well known that these indicators poorly correlate with fecal pollution contamination events and risk of disease. The field of public health-related …
Whiting Events Off Southwest Florida: Remote Sensing And Field Observations, Jacqueline Long
Whiting Events Off Southwest Florida: Remote Sensing And Field Observations, Jacqueline Long
USF Tampa Graduate Theses and Dissertations
“Whiting” is a term used to describe a sharply defined patch of water that contains high levels of suspended, fine-grained calcium carbonate (CaCO3). These features are named for their bright (at times white) appearance when compared to surrounding waters, and have been found to occur globally, persisting for multiple consecutive days. Although whitings have been widely studied using chemical, biological, geological, and physical techniques, there has been little effort to document their spatio-temporal distributions in a systematic way, not to mention the lack of consensus on what generates whitings and allows them to persist for days to weeks …
U.S. Drought Monitor, November 1, 2016, Deborah J. Bathke
U.S. Drought Monitor, November 1, 2016, Deborah J. Bathke
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for November 1, 2016 (11/1/16) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
Climate Change And The Integrity Of Science, Peter H. Gleick, James L. Van Etten, Members Of The U.S. National Academy Of Sciences
Climate Change And The Integrity Of Science, Peter H. Gleick, James L. Van Etten, Members Of The U.S. National Academy Of Sciences
James Van Etten Publications
We are deeply disturbed by the recent escalation of political assaults on scientists in general and on climate scientists in particular. All citizens should understand some basic scientific facts. There is always some uncertainty associated with scientific conclusions; science never absolutely proves anything. When someone says that society should wait until scientists are absolutely certain before taking any action, it is the same as saying society should never take action. For a problem as potentially catastrophic as climate change, taking no action poses a dangerous risk for our planet.
Scientific conclusions derive from an understanding of basic laws supported by …
Perspectives On The Development Of A Local Food System: The Case Of Dayton, Ohio, Diana Cuy Castellanos, John C. Jones, Joanne Christaldi, Katherine A. Liutkus
Perspectives On The Development Of A Local Food System: The Case Of Dayton, Ohio, Diana Cuy Castellanos, John C. Jones, Joanne Christaldi, Katherine A. Liutkus
Health and Sport Science Faculty Publications
Multiple sectors play vital roles in a community’s development and maintenance of a sustainable local food system. This study explored the perceptions of twenty-two representatives from the civil society, public, and private sectors in Dayton, Ohio, about the development of the region’s local food system. The researchers employed grounded theory methodology for data collection and analysis. Core themes from the participants of each sector group emerged from the data and areas of convergence and divergence among groups were reported.
Integrated Fisheries Management Resource Report Pearl Oyster (Pinctada Maxima) Resource, Department Of Fisheries
Integrated Fisheries Management Resource Report Pearl Oyster (Pinctada Maxima) Resource, Department Of Fisheries
Fisheries management papers
This report has been prepared to provide the Intergrated Fisheries Allocation Advisory Committee (Allocation Committee) with a summarised, factual account of the nature and status of the Pinctada maxima (P. maxima) pearl oyster resource and current and historical trends in its use and conservation.
Identifying Groundwater - Dependent Wetlands Of The Broome Sandstone Aquifer In The La Grange Groundwater Area, Nicholas Wright, Richard J. George Dr, Robert Paul, Paul Raper
Identifying Groundwater - Dependent Wetlands Of The Broome Sandstone Aquifer In The La Grange Groundwater Area, Nicholas Wright, Richard J. George Dr, Robert Paul, Paul Raper
Resource management technical reports
This report identifies wetlands that are likely to be dependent on the Broome Sandstone aquifer within the La Grange groundwater allocation area. The Broome Sandstone aquifer is the dominant groundwater resource in the area. With potential agricultural growth of this area, it is necessary to understand, monitor and manage the aquifer and its dependent wetlands. This report describes how we created a watertable surface that was used to identify wetlands and to determine which of the previously mapped wetlands are likely to be sourced from the Broome Sandstone aquifer. A watertable surface was created from 148 points taken from bore …
Impact Of Climate Change On Corn Yields In Alabama, Pauline Welikhe, Joseph Essamuah-Quansah, Kenneth Boote, Senthold Asseng, Gamal El Afandi, Souleymane Fall, Desmond Mortley, Ramble Ankumah
Impact Of Climate Change On Corn Yields In Alabama, Pauline Welikhe, Joseph Essamuah-Quansah, Kenneth Boote, Senthold Asseng, Gamal El Afandi, Souleymane Fall, Desmond Mortley, Ramble Ankumah
Professional Agricultural Workers Journal
Abstract
The study used calibrated Crop Environment Resource Synthesis (CERES) maize (corn) model to simulate maize (corn) physiological growth processes and yields under 2045 and 2075 projected climate change scenarios for six representative counties in Alabama. The future climatologies for two emission scenarios Representative Concentration Pathway (RCP) 4.5 (medium) and RCP 8.5 (high) were developed based on the IPSL-CM5A-MR high resolution climate model. Average yield decreases of 19.5% and 37.3% were, respectively, projected under RCP 4.5 and RCP 8.5 for 2045, and average yield decreases of 32.5% and 77.8% were, respectively, projected under RCP 4.5 and RCP 8.5 for 2075. …
U.S. Drought Monitor, October 25, 2016, David Simeral
U.S. Drought Monitor, October 25, 2016, David Simeral
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for October 25, 2016 (10/25/16) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
Agenda: Flpma Turns 40, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
Agenda: Flpma Turns 40, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
FLPMA Turns 40 (October 21)
The Bureau of Land Management (BLM) administers approximately 245 million acres of our public lands and yet, for most of our nation's history, these lands seemed largely destined to end up in private hands. Even when the Taylor Grazing Act of 1934 ushered in an important era of better managing public grazing districts and "promoting the highest use of the public lands," such use of our public lands still was plainly considered temporary, "pending its final disposal." It was not until 1976 with the passage of the Federal Land Policy and Management Act (FLPMA) that congress adopted a policy that …
Slides: Flpma In Its Historical Context, John D. Leshy
Slides: Flpma In Its Historical Context, John D. Leshy
FLPMA Turns 40 (October 21)
Presenter: John D. Leshy, Sunderland Distinguished Professor of Law Emeritus, U.C. Hastings College of the Law
36 slides
This session traces the history of FLPMA including, among other things, its legislative, administrative, and historical antecedents, including for example, the Public Land Law Review Commission’s 1970 report, One Third of Our Nation’s Lands. It then considers FLPMA’s unique public lands policies and requirements and how they are reflected in the BLM’s management of public lands today.
See: https://www.nps.gov/parkhistory/online_books/blm/history/contents.htm
Mathematical Modeling In Collaborative Courses: The Soup To Nuts Experience, Sarah Hews, Christina Cianfrani
Mathematical Modeling In Collaborative Courses: The Soup To Nuts Experience, Sarah Hews, Christina Cianfrani
Annual Symposium on Biomathematics and Ecology Education and Research
No abstract provided.
Assessing Ecological And Economic Effects Of Derelict Fishing Gear: A Guiding Framework, Christopher F.G. Jeffrey, Kirk J. Havens, H. Ward Slacum Jr., Donna Marie Bilkovic, Danielle Zaveta, Andrew M. Scheld, Sean Willard, John D. Evans
Assessing Ecological And Economic Effects Of Derelict Fishing Gear: A Guiding Framework, Christopher F.G. Jeffrey, Kirk J. Havens, H. Ward Slacum Jr., Donna Marie Bilkovic, Danielle Zaveta, Andrew M. Scheld, Sean Willard, John D. Evans
Reports
Developing standardized protocols to assess the ecological and socio-economic effects of marine debris – especially, derelict fishing gear – is critical for the protection of natural resources and for evaluating policies and programs designed to reduce and remove debris. This document outlines a Derelict Fishing Gear Assessment Framework to guide the development and implementation of derelict gear assessment, management and mitigation. The framework draws from techniques and protocols developed to assess derelict crab traps effects in the Chesapeake Bay and on past derelict gear assessments either conducted by or known to the framework authors. However, this framework is generalized and …
Ecological And Economic Effects Of Derelict Fishing Gear In The Chesapeake Bay 2015/2016 Final Assessment Report, Donna M. Bilkovic, H. Ward Slacum Jr., Kirk J. Havens, Danielle Zaveta, Christopher F.G. Jeffrey, Andrew M. Scheld, David Stanhope, Kory Angstadt, John D. Evans
Ecological And Economic Effects Of Derelict Fishing Gear In The Chesapeake Bay 2015/2016 Final Assessment Report, Donna M. Bilkovic, H. Ward Slacum Jr., Kirk J. Havens, Danielle Zaveta, Christopher F.G. Jeffrey, Andrew M. Scheld, David Stanhope, Kory Angstadt, John D. Evans
Reports
Derelict fishing gear represents a major challenge to marine resource management: whether through deliberate abandonment or through accidental loss, derelict traps in particular have significant negative effects both economic (e.g., reduced fishery harvest from ghost fishing and gear competition that leads to the reduced efficiency of active gear) and ecological (e.g., degraded habitats and marine food webs and crab and bycatch mortality). Throughout the Chesapeake Bay, commercial harvest of hard-shelled blue crabs is a major fishing activity: every year sees the deployment of several hundred thousand blue crab traps (known locally as crab “pots”) across the Bay, of which an …
The Eco-Epidemiology Of Pacific Coast Tick Fever In California, Kerry A. Padgett, Denise L. Bonilla, Marina E. Eremeeva, Carol A. Glaser, Robert S. Lane, Charsey Cole Porse, Martin B. Castro, Sharon L. Messenger, Alex Espinosa, Jill Hacker, Anne Kjemtrup, Bonnie Ryan, Jamesina J. Scott, Renjie Hu, Melissa Hardstone Yoshimizu, Gregory A. Dasch, Vicki Kramer
The Eco-Epidemiology Of Pacific Coast Tick Fever In California, Kerry A. Padgett, Denise L. Bonilla, Marina E. Eremeeva, Carol A. Glaser, Robert S. Lane, Charsey Cole Porse, Martin B. Castro, Sharon L. Messenger, Alex Espinosa, Jill Hacker, Anne Kjemtrup, Bonnie Ryan, Jamesina J. Scott, Renjie Hu, Melissa Hardstone Yoshimizu, Gregory A. Dasch, Vicki Kramer
Environmental Health Sciences Faculty Publications
Rickettsia philipii (type strain “Rickettsia 364D”), the etiologic agent of Pacific Coast tick fever (PCTF), is transmitted to people by the Pacific Coast tick, Dermacentor occidentalis. Following the first confirmed human case of PCTF in 2008, 13 additional human cases have been reported in California, more than half of which were pediatric cases. The most common features of PCTF are the presence of at least one necrotic lesion known as an eschar (100%), fever (85%), and headache (79%); four case-patients required hospitalization and four had multiple eschars. Findings presented here implicate the nymphal or larval stages of D …
Takeover On The Tallgrass Prairie: How Lespedeza Cuneata Establishes Dominance, Morgan Rae Walder
Takeover On The Tallgrass Prairie: How Lespedeza Cuneata Establishes Dominance, Morgan Rae Walder
Theses and Dissertations
Invasion ecology aims to study mechanisms by which invasive species are able to enter, establish, and spread within an ecosystem. This study analyzed Darwin’s naturalization and the biotic resistance hypotheses as the most likely explanations for invasion by an exotic legume, Lespedeza cuneata, into a tallgrass prairie. Darwin’s naturalization hypothesis posits that exotic species are less able to establish in communities that have related species, because similarity in morphology and function promotes intense competition for resources. The biotic resistance hypothesis states that competitors, herbivores, and pathogens already present in the community limit the colonization, naturalization, and persistence of invaders, therefore …
U.S. Drought Monitor, October 4, 2016, Brian Fuchs
U.S. Drought Monitor, October 4, 2016, Brian Fuchs
United States Agricultural Commodities in Drought Archive
Drought map of U.S. for October 4, 2016 (10/4/16) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.
Weights And Balances: Integrating Models For Prevention And Response To Southern California Offshore Oil Spills, Carmen Watts Clayton, Amoret Bunn
Weights And Balances: Integrating Models For Prevention And Response To Southern California Offshore Oil Spills, Carmen Watts Clayton, Amoret Bunn
STAR Program Research Presentations
Licensing offshore oil and gas reserves in the United States waters are overseen by the U.S. Department of the Interior’s Bureau of Safety and Enforcement (BSEE). The licensing application includes planning for any worst-case oil spill scenario between BSEE and the applicant based on lessons learned from historic offshore spills such as the Deepwater Horizon (2010), Exxon Valdez (1989), and the Union Oil Platform Blowout (1969). The process for planning to respond to oil spills involves coordination with multiple agencies, trustees, and stakeholders to ensure that oil spill responses consider multiple factors, including ecologically sensitive species, commercial transportation and fisheries, …
Measuring The Impact Of Pollution Closures On Commercial Shellfish Harvest: The Case Of Soft-Shell Clams In Machias Bay, Maine, Keith S. Evans, Kevin Athearn, Xuan Chen, Kathleen P. Bell, Tora Johnson
Measuring The Impact Of Pollution Closures On Commercial Shellfish Harvest: The Case Of Soft-Shell Clams In Machias Bay, Maine, Keith S. Evans, Kevin Athearn, Xuan Chen, Kathleen P. Bell, Tora Johnson
Publications
Temporary closures of polluted coastal waters to shellfish harvesting protect human health but also generate broad socioeconomic impacts on rural, fishing-dependent communities. Improved understanding of these impacts could help coastal managers prioritize investments to protect water quality and mitigate the effects of coastal pollution. Using a regression model of monthly landings, we explore the impact of temporary closures on the commercial harvest of soft-shell clams (Mya arenaria) in the Machias Bay region of Maine (USA). We find that economic losses are significant and depend heavily on tidal activity, and the size, frequency and timing of closures. Over the …
Quantifying Undisturbed (Native) Lands In Eastern South Dakota: 2013, Pete Bauman, Benjamin Carlson, Tanner Butler
Quantifying Undisturbed (Native) Lands In Eastern South Dakota: 2013, Pete Bauman, Benjamin Carlson, Tanner Butler
Quantifying Undisturbed (Native) Lands in Eastern South Dakota: 2013
We employed simple GIS methods primarily utilizing the South Dakota Farm Service Agency’s Common Land Unit (CLU) data layers from 2013, along with 2012 US Department of Agriculture (USDA) National Agriculture Imagery Program (NAIP) county mosaic aerial imagery, to evaluate approximately 22.6 million acres of land in the 44 counties that comprise eastern South Dakota. Mapping of this total project area was done in three distinct project phases from 2014 through 2016. We utilized the CLU data layer, queried to show current and former cropland, to first identify and remove any areas with a cropping history, regardless of current land …
Arboretum Annual Report 2015-2016, Glenn Dreyer
The Coastal Monitor: Vol. 1, No. 3, John Tanacredi Ph.D.
The Coastal Monitor: Vol. 1, No. 3, John Tanacredi Ph.D.
The Coastal Monitor
Each fall I teach a course in “Ecology” and in the spring, “Marine Biology”; two seminal courses absolutely necessary and required to complete a BS Degree in Earth and Environmental Studies at Molloy College. To a large extent I draw on my 48 years of life experiences; flight meteorologist, “Hurricane Hunter” in the US Navy (1968-1970), environmental impact analyst with the US Coast Guard’s Bridge Administration on Governors Island (1974-1978); Coastal Barrier Parks Coordinator and Research Ecologist with the National Park Service (1978-2001); Research Associate in the Invertebrate Zoology Department at the American Museum of Natural History(1982-2000); Chairman Department of …
Testing Predictions Used To Build An Agrivoltaics Installation On A Small-Scale Educational Model, Katie Kinney, Rebecca Minor, Greg Barron-Gafford
Testing Predictions Used To Build An Agrivoltaics Installation On A Small-Scale Educational Model, Katie Kinney, Rebecca Minor, Greg Barron-Gafford
STAR Program Research Presentations
Models are valuable tools for explaining and testing systems. Small-scale models can be especially useful for educational purposes. For models to be useful, they have to accurately depict the larger system that they are describing. A novel man-made system, known as an agrivoltaic structure, is being constructed at Biosphere 2 near Oracle, Arizona. The word agrivoltaic is a combination of agriculture and photovoltaics, or solar farming. My research involved creating a small-scale version of this system for educational purposes. The model of this system tested two predictions: that plants will grow better in the shade of a panel and that …