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Habitat Modeling Of Three Endemic Crayfish Species In The Black River Drainage Of Missouri And Arkansas: Factors Affecting Distribution And Abundance, Matthew Stephen Nolen

Graduate Theses and Dissertations

The Ozark faunal region of Missouri and Arkansas harbors a high level of aquatic biological diversity, especially in regards to endemic crayfish. Orconectes eupunctus, Orconectes marchandi, and Cambarus hubbsi are three such endemics that are threatened by a limited natural distribution and the invasions of Orconectes neglectus. I sought to determine how natural and anthropogenic factors influence these three species across multiple spatial scales. Local and landscape data were used in decision tree analyses (CART) to determine their influence effect on presence/absence and density of the three species. Predictive models were validated using k-fold cross validation. O. eupunctus presence was …

Design Of A Pretreatment And Enzymatic Saccharification Scheme Of Understory From Managed Pine Forest For A Biochemical-Refinery Platform: The Example Of The Sweetgum Tree, Angele Djioleu

Graduate Theses and Dissertations

The possibility of using sweetgum from southern pine dominated forests as a biobased refinery feedstock was investigated. First, a baseline hydrolysis scheme for sweetgum wood and bark was designed. Sweetgum wood and bark were pretreated with 0.98% (v/v) sulfuric acid at 140°C for 30, 40, 50, 60 or 70 min and at 160°C for 30, 40, 50 or 60 min. The water insoluble solid (WIS) fraction was hydrolyzed with a cellulase enzyme cocktail. Results showed that maximum xylose and glucose yields from the wood were 82 and 86%, respectively. Similarly, the respective maximum yields of xylose and glucose from the …

The Effects Of River Sediment, Endosulfan, And Moderate Hypoxia On Blue Crabs (Callinectes Sapidus) From The Tidal, Freshwater James River, Laura Williams

Theses and Dissertations

Juvenile male blue crabs move into the tidal, freshwater James River during warmer months to feed and grow by undergoing molting. In crustaceans, growth and molting are hormonally controlled. The physiological effects of a multiple-stressor environment are determined by comparing the blue crab’s oxygen uptake after exposure to pure sand, James River sediment, or endosulfan-spiked sand. The effect of multiple stressors on molting is measured by the activity level of N-acetyl-ß-glucosaminidase (NAG), an enzyme in epidermal tissue important to molting. The oxygen uptake was decreased by exposure to James River sediment but not for exposure to endosulfan for seven days. …

Divergent Carbon Dynamics Under Climate Change In Forests With Diverse Soils, Tree Species, And Land Use Histories, Robert M. Scheller, Alec M. Kretchun, Steve Van Tuyl, Kenneth L. Clark, Melissa S. Lucash, John Hom

Environmental Science and Management Faculty Publications and Presentations

Accounting for both climate change and natural disturbances—which typically result in greenhouse gas emissions—is necessary to begin managing forest carbon sequestration. Gaining a complete understanding of forest carbon dynamics is, however, challenging in systems characterized by historic over-utilization, diverse soils and tree species, and frequent disturbance. In order to elucidate the cascading effects of potential climate change on such systems, we projected forest carbon dynamics, including soil carbon changes, and shifts in tree species composition as a consequence of wildfires and climate change in the New Jersey pine barrens (NJPB) over the next 100 years. To do so, we used …

Linking Old-Growth Forest Composition, Structure, Fire History, Climate And Land-Use In The Mountains Of Northern México, Citlali Cortes Montano, Peter Z. Fule, Donald A. Falk, Jose Villanueva-Diaz, Larissa L. Yocom Kent

Wildland Resources Faculty Publications

Old-growth forests are biologically and ecologically valuable systems that are disappearing worldwide at a rapid rate. México still holds large areas covered by temperate forests in the mountains of the Sierra Madre Occidental, but few of these retain old-growth characteristics. We studied four sites with remnant old-growth forests in Mesa de las Guacamayas, a site in the Sierra Madre Occidental in northwestern Chihuahua, to assess their composition, structure, and age characteristics. Overstory tree densities and basal areas at each site were based on measurements of all trees >1.3 m tall. The overstory was dominated by large Pinus durangensis, P. strobiformis, …

Do Low-Mercury Terrestrial Resources Subsidize Low-Mercury Growth Of Stream Fish? Differences Between Species Along A Productivity Gradient, Darren M. Ward, Keith H. Nislow, Carol L. Folt

Dartmouth Scholarship

Low productivity in aquatic ecosystems is associated with reduced individual growth of fish and increased concentrations of methylmercury (MeHg) in fish and their prey. However, many stream-dwelling fish species can use terrestrially-derived food resources, potentially subsidizing growth at low-productivity sites, and, because terrestrial resources have lower MeHg concentrations than aquatic resources, preventing an increase in diet-borne MeHg accumulation. We used a large-scale field study to evaluate relationships among terrestrial subsidy use, growth, and MeHg concentrations in two stream-dwelling fish species across an in-stream productivity gradient. We sampled young-of-the-year brook trout ( Salvelinus fontinalis ) and Atlantic salmon ( Salmo salar …

Using Landscape Pattern Metrics To Characterize Ecoregions, Martha Isabel Posada Posada

School of Natural Resources: Dissertations, Theses, and Student Research

Ecological regions, or ecoregions, are areas that exhibit “relative homogeneity in ecosystems”. The principal objective of this research was to determine if and how landscape structure (quantified by landscape pattern metrics) may be related to ecoregions defined using Omernik’s approach to ecoregionalization. Nine key landscape pattern metrics (number or LULC classes and the proportion of each class, number of patches, mean patch size and area-weighted fractal dimension, perimeter-area fractal dimension, contagion, mean Euclidean nearest neighbor distance and interspersion and juxtaposition index) where used to asses landscape structure in a sample of 26 Omernik Level III ecoregions located in the central …

The Fierce Green Fire: Vol. 3 Issue 8, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.

Evolutionary And Practical Implications Of Pseudo-Estrus Behavior In Florida Panthers (Puma Concolor Coryi), John F. Benson, Mark A. Lotz, E. Darrell Land, Dave P. Onorato

School of Natural Resources: Faculty Publications

Estrus behavior by females for reasons other than reproduction (pseudo-estrus) has been reported in species of primates and felids, and alternative hypotheses have been put forth to explain its evolution and function. We observed 3 separate cases of pseudo-estrus behavior by 2 Puma concolor coryi (Florida Panther) females while they were nursing young (old) kittens. We used VHF and GPS telemetry data, genetic pedigree analysis, and visual observations to provide insight into the evolutionary and practical implications of this behavior for Panthers. We suggest that female Panthers likely consort with males while nursing kittens to maintain amicable relations with these …

The Houtman Abrolhos Islands Management Plan., Department Of Fisheries Western Australia.

Fisheries Management Papers

The Houtman Abrolhos Islands Management Plan aims to describe how this vision and associated strategic objectives can be achieved over the next five years, through addressing the risks posed to the cultural and environmental heritage values of the Abrolhos.

The Design And Testing Of A Solar Autoclave With Broad Spectrum Sterilization Capabilities, Sarah S. Trabia

Honors College Theses

Energy is difficult to come by in developing countries and this interferes with the ability of doctors to provide good healthcare to their patients. Without decent sterilization, patients can become infected and diseases can spread throughout hospitals. This study involves designing a solar autoclave for developing countries that is as efficient as electrical autoclaves. The design is intended to not require any electrical input and to be affordable to those who cannot afford advanced medical equipment. Once the solar autoclave is designed, it will be tested to determine if it can sterilize equipment against a variety of different bacteria, including …

Examining Ways To Promote Water Conservation At Golf Courses In Bloomington-Normal, Illinois, Rose Kelly '13

Outstanding Senior Seminar Papers

The purpose of this study was to examine ways for golf courses in Bloomington-Normal, Illinois, to promote water conservation. As the demand for freshwater exponentially increases around the United States, it becomes necessary to examine current freshwater uses, especially those for recreational purposes. Golf courses are one of the largest freshwater users, with a typical course consuming hundreds of thousands of gallons every day for grass maintenance. With water shortages and insecure future water supplies, golf courses around the United States are urgently looking for ways to promote water conservation. This includes golf courses in Bloomington-Normal, Illinois. The severe drought …

Buchholz Black Dash (Euphyes Conspicua Buchholzi): Species Conservation Assessment, Melissa J. Panella

Nebraska Game and Parks Commission: Publications

The primary goal in development of at-risk species conservation assessments is to compile biological and ecological information that may assist conservation practitioners in making decisions regarding the conservation of species of interest. The Nebraska Natural Legacy Project recognizes the Buchholz Black Dash (Euphyes conspicua buchholzi) as a Tier I at-risk species of high conservation priority. The Buchholz Black Dash (BBD) is a subspecies of the Black Dash (Euphyes conspicua). Survival of BBD is likely to be highly influenced by available habitat in Nebraska. Some general management recommendations are made here regarding the BBD; however, conservation practitioners will need to use …

Mccown’S Longspur (Rhynchophanes Mccownii): Species Conservation Assessment, Melissa J. Panella

Nebraska Game and Parks Commission: Publications

The primary goal in development of at-risk species conservation assessments is to compile biological and ecological information that may assist conservation practitioners in making decisions regarding the conservation of species of interest. The Nebraska Natural Legacy Project recognizes the McCown’s Longspur (Rhynchophanes mccownii) as a Tier I at-risk species. Some general management recommendations are made here regarding the McCown’s Longspur (MCLO); however, conservation practitioners will need to use professional judgment to make specific management decisions based on objectives, location, and a multitude of variables. This resource was designed to share available knowledge of MCLO that will aid in the decision-making …

Situation Statement: The 'Prickle Bush' Weeds (Mesquite, Parkinsonia And Prickly Acacia) In Western Australia, Jon Dodd, Andrew Reeves, Richard Watkins, Linda Anderson

Biosecurity published reports

The term 'Prickle bush weeds' refers to weedy trees and shrubs of Mesquite, Parkinsonia and Prickly acacia. All are present in Western Australia.

Mesquite and Parkinsonia are widespread, well established woody weeds in various parts of the WA Rangelands. Prickly acacia is a recent introduction and has a relatively restricted distribution in the East Kimberley. All three impact mainly on the pastoral industry and have considerable potential for further spread and greater impact within the Rangelands. All are Weeds of National Significance (WoNS) and are high priority Declared Plants in WA.

The purpose of this situation statement is to describe …

The Fierce Green Fire: Vol. 3 Issue 7, Wofford College Environmental Studies Program

The Fierce Green Fire

No abstract provided.

Organics In Environmental Ices: Sources, Chemistry, And Impacts, V. F. Mcneill, A. M. Grannas, J. P. D. Abbatt, M. Ammann, P. Ariya, T. Bartels-Rausch, F. Domine, D. J. Donaldson, Marcelo I. Guzman, D. Heger, T. F. Kahan, P. Klán, S. Masclin, C. Toubin, D. Voisin

Chemistry Faculty Publications

The physical, chemical, and biological processes involving organics in ice in the environment impact a number of atmospheric and biogeochemical cycles. Organic material in snow or ice may be biological in origin, deposited from aerosols or atmospheric gases, or formed chemically in situ. In this manuscript, we review the current state of knowledge regarding the sources, properties, and chemistry of organic materials in environmental ices. Several outstanding questions remain to be resolved and fundamental data gathered before an accurate model of transformations and transport of organic species in the cryosphere will be possible. For example, more information is needed regarding …

Indicators Of Hydrologic Permanence In Headwater Streams Of South Carolina, William R. Wenerick, Ken M. Fritz, Mitch S. Kostich

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Application Of Qpcr Technologies In Stormwater Source Tracking And Determination Of Host Contributions Of Fecal Indicator Bacteria, J Michael Trapp, Erin Burge, Susan Libes

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Hydrologic Influences Within A Tidal Freshwater Forested Wetland, Brooke V. James, Carl C. Trettin, Timothy J. Callahan

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

A Case Study In Watershed-Based Plan Development And Implementation For The May River Watershed In Bluffton, Sc, Kimberly W. Jones, Ronald Bullman

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Spatially Explicit Decision Support For Watershed Management On Military Lands: Stream Integrity, Interactive Programming, And Best Management Practices, J Pike, D Lipscomb, R Baldwin, W English

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Fish Health In The Reedy-Saluda Watershed, As Measured Through Biochemical Markers, Peter Van Den Hurk, Jessica Mierzejewski, Lindsay Gerzel, Dennis C. Haney

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Sediment Based Turbidity Analyses For Representative South Carolina Soils, K E. Resler, C B. Sawyer, C V. Privette Iii, J C. Hayes

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Fish Community Response To Dam Removal In Twelvemile Creek, Pickens County, South Carolina, Cathy A. Marion, Mark C. Scott, Kevin M. Kubach

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Passive Polymer Application For Turbidity Reduction, James W. Berry Iii, Calvin B. Sawyer, Charles V. Privette Iii, John C. Hayes, William C. Bridges Jr

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Dying Of Thirst: Impact Of Reduced Freshwater Inflow On South Carolina Blue Crabs, Michael J. Childress, Kirk J. Parmenter

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Green Infrastructure In Coastal Landscapes: Ecological Design, Hydrological Function, And Sustainable Land Use Goals, Daniel R. Hitchcock, Anand D. Jayakaran, Thom H. Epps, David L. White

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Long Bay Hypoxia Monitoring Consortium, Susan Libes, Michael Trapp, Scott Kindelberger, Danielle Doremus

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management

Evaluating Potential Nonpoint Source Pollution Impacts In The Upper Reaches Of The Horse Creek Watershed In Aiken County, Sc, S M. Harmon, K E. Edgington, J L. Pinckney, J R. Yates, P W. Steen

S.C. Water Resources Conference

2012 S.C. Water Resources Conference - Exploring Opportunities for Collaborative Water Research, Policy and Management