Effects Of Silvicultural Management On Coast Redwood Forest Composition, Density And Structure In Santa Cruz And San Mateo Counties,
2012
California Polytechnic State University, San Luis Obispo
Effects Of Silvicultural Management On Coast Redwood Forest Composition, Density And Structure In Santa Cruz And San Mateo Counties, Michael J. Papa
Master's Theses
The multiple-objective exploratory study investigates effects of various silvicultural management regimes commonly applied to coast redwood (Sequoia sempervirens [D. Don] Endl.) forests in Santa Cruz and San Mateo Counties, California, USA. A temporary forest inventory was installed in 24 harvest origin stands and 4 natural origin stands throughout the study area (sample area = 1189 acres). Data from the systematic sample of 233 one-quarter acre nested cluster plots (sample intensity = 4.9%) rendered overall forest descriptions in terms of species composition, density, and structure. The common forestry measures of trees per acre (TPA), basal area per acre (BA), and …
Interactions Of Zoo Plankton And Phytoplankton With Cyanobacteria,
2012
University of Nebraska-Lincoln
Interactions Of Zoo Plankton And Phytoplankton With Cyanobacteria, Rebecca J. Alexander
School of Natural Resources: Dissertations, Theses, and Student Research
Cyanobacteria are a major concern in Nebraska reservoirs and are capable of producing toxins that can cause skin irritations and gastrointestinal problems, as well as affect the nervous system. It is important to determine the mechanisms that can cause cyanobacteria blooms due to the effect they can have on human health. The interaction of zooplankton and other phytoplankton groups with cyanobacteria is important because there is a biological component in surface waters that should be taken into consideration along with the physical and chemical parameters that have been noted to promote cyanobacteria. For example, zooplankton have the ability to alter …
Interactions Of Zooplankton And Phytoplankton With Cyanobacteria,
2012
University of Nebraska-Lincoln
Interactions Of Zooplankton And Phytoplankton With Cyanobacteria, Rebecca Alexander
School of Natural Resources: Dissertations, Theses, and Student Research
Cyanobacteria are a major concern in Nebraska reservoirs and are capable of producing toxins that can cause skin irritations and gastrointestinal problems, as well as affect the nervous system. It is important to determine the mechanisms that can cause cyanobacteria blooms due to the effect they can have on human health. The interaction of zooplankton and other phytoplankton groups with cyanobacteria is important because there is a biological component in surface waters that should be taken into consideration along with the physical and chemical parameters that have been noted to promote cyanobacteria. For example, zooplankton have the ability to alter …
Insights From Characterizing Extinct Human Gut
Microbiomes,
2012
University of Oklahoma
Insights From Characterizing Extinct Human Gut Microbiomes, Raul Y. Tito, Dan Knights, Jessica Metcalf, Alexandra J. Obregon-Tito, Lauren Cleeland, Fares Najar, Bruce Roe, Karl Reinhard, Kristin Sobolik, Samuel Belknap, Morris Foster, Paul Spicer, Rob Knight, Cecil M. Lewis, Jr.
School of Natural Resources: Faculty Publications
In an effort to better understand the ancestral state of the human distal gut microbiome, we examine feces retrieved from archaeological contexts (coprolites). To accomplish this, we pyrosequenced the 16S rDNA V3 region from duplicate coprolite samples recovered from three archaeological sites, each representing a different depositional environment: Hinds Cave (~8000 years B.P.) in the southern United States, Caserones (1600 years B.P.) in northern Chile, and Rio Zape in northern Mexico (1400 years B.P.). Clustering algorithms grouped samples from the same site. Phyletic representation was more similar within sites than between them. A Bayesian approach to source-tracking was used to …
Effects Of Flooding And Tamarisk Removal On Habitat For Sensitive Fish Species In The San Rafael River, Utah: Implications For Furture Restoration Efforts,
2012
Utah State University
Effects Of Flooding And Tamarisk Removal On Habitat For Sensitive Fish Species In The San Rafael River, Utah: Implications For Furture Restoration Efforts, Daniel Louis Keller
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Part I of this report is focused on assessment of habitat changes on the San Rafael River after the abnormally high water year in 2011. Having habitat data and aerial imagery collected in 2010 (pre-flood) provided an opportunity to assess how a flood of this magnitude changed river habitat. In 2011 we commissioned a second aerial flight of the San Rafael River to serve as post flood imagery, then used Geographic Information Systems (GIS, ArcMap 10) to analyze river changes due to tamarisk removal and flooding. Our tamarisk removal project appears to have increased the potential for spring floods to …
Habitat Modeling Of Three Endemic Crayfish Species In The Black River Drainage Of Missouri And Arkansas: Factors Affecting Distribution And Abundance,
2012
University of Arkansas, Fayetteville
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 …
Assessing The Impacts Of Surface Water Removal For Use In Natural Gas Extraction On A Watershed Level,
2012
University of Arkansas, Fayetteville
Assessing The Impacts Of Surface Water Removal For Use In Natural Gas Extraction On A Watershed Level, Carrie Ann Davis
Graduate Theses and Dissertations
In this study, the Soil and Water Assessment Test (SWAT) was used as a tool to predict whether diffuse water removal from the Cadron Creek watershed for use with natural gas development would have an impact on downstream flow within the watershed. Cadron Creek watershed expands across four counties within Arkansas and is located in the Fayetteville Shale Gas region. This region is experiencing significant growth in natural gas development. Successful development of shale gas depends on the identification of what water supplies are available for production without interfering with community and environmental needs. The SWAT model used to evaluate …
Interior Least Tern Powerline Collision On The Lower Platte River,
2012
Nebraska Game and Parks Commission
Interior Least Tern Powerline Collision On The Lower Platte River, Lauren R. Dinan, Joel G. Jorgensen, Mary Bomberger Brown
The Prairie Naturalist
Collisions with electrical powerlines are a well-known documented cause of avian mortality (Avian Power Line Interaction Committee [APLIC] 1994, Savereno et al. 1996). Mortality caused by collisions with powerlines can be an important concern for many bird species, but is a serious conservation problem for threatened and endangered species because any mortality can have biological and legal ramifications (Janss 2000). Loss of individuals, particularly breeding adults, from an already small population may impede a species’ recovery by reducing reproduction and recruitment into the breeding population. The death of an individual from a threatened or endangered species as a result of …
Avian Diversity And Habitat Use On Wetland Reserve Program Lands In The Lower Missouri River Valley,
2012
United States Department of Agriculture
Avian Diversity And Habitat Use On Wetland Reserve Program Lands In The Lower Missouri River Valley, Eric C. Hopps
The Prairie Naturalist
A primary objective of the Wetland Reserve Program (WRP) is to provide habitat for migratory birds throughout all seasons of the year. Comprehensive avian assessments are lacking and limit our ability to evaluate the benefits of the WRP to continental bird populations. I investigated avian species occurrence on WRP lands within the Lower Missouri River Valley (LMRV), Nebraska, USA, from March 2010 to February 2011. Ten WRP habitat types are described based on plant community assemblages and observed hydrological regimes. Estimates of avian species richness were greatest in lowland forest (n = 115), lowland woodland (n = 83) and upland …
Fish Assemblage Structure In Black Hills, South Dakota Streams,
2012
South Dakota State University & Oregon State University
Fish Assemblage Structure In Black Hills, South Dakota Streams, Luke D. Schultz, Sarah J. Lewis, Katie Nicole Bertrand
The Prairie Naturalist
Understanding factors structuring fish assemblages in a particular area is valuable to both sport fishery management and native species conservation. Fish assemblages in the Black Hills are unique to South Dakota because they contain economically valuable introduced salmonids as well as native species of conservation need. Our objective was to examine the relationship between fish assemblages and geomorphic and reach-scale habitat features across multiple stream reaches in the Black Hills. Canonical correspondence analysis, a direct gradient ordination analysis, indicated that factors operating at multiple spatial scales interacted to structure fish assemblages. There also was indication of segregation between native species …
Walleye Trophic Position Before And After A Gizzard Shad Extirpation,
2012
Department of Natural Resources, Finland
Walleye Trophic Position Before And After A Gizzard Shad Extirpation, Bethany J. Bethke, Justin A. Vandehey, Mark J. Fincel, Brian D.S. Graeb, Mark T. Porath
The Prairie Naturalist
Walleye (Sander vitreus) are an ecologically and recreationally important sport fish species. Reduced growth and condition in walleye can occur when prey availability is limited. In two Nebraska reservoirs, walleye consumed gizzard shad (Dorosoma cepedianum) as their primary prey until a winterkill extirpated the gizzard shad in 2001. Because of the winterkill, walleye in the two reservoirs had to change to alternative prey items. Our objective was to determine if stable isotope analysis on archived walleye scales can be used to detect a known food web shift in two reservoir food webs. We quantified the changes …
Restoration Of Biological Soil Crust On Disturbed Gypsiferous Soils In Lake Mead National Recreation Area, Eastern Mojave Desert,
2012
University of Nevada, Las Vegas
Restoration Of Biological Soil Crust On Disturbed Gypsiferous Soils In Lake Mead National Recreation Area, Eastern Mojave Desert, Lindsay P. Chiquoine
UNLV Theses, Dissertations, Professional Papers, and Capstones
Biological soil crusts (BSCs) are sensitive to anthropogenic disturbances. Natural recovery takes many years. Active restoration decreases recovery time. Native BSC inocula, which included lichens and mosses, salvaged from gypsiferous soil habitats in Lake Mead National Recreation Area (LMNRA) in the eastern Mojave Desert were stored dry for two years and applied to disturbed soil after a road reconstruction in LMNRA and also used in laboratory experiments to test inoculation technique effectiveness. After 18 months, field results revealed positive relationships between inoculation and the presence of macroscopic BSC cover, cyanobacteria abundance, soil stability, and ammonium concentrations. Chlorophyll fluorescence monitoring of …
Evolutionary And Practical Implications Of Pseudo-Estrus Behavior In Florida Panthers (Puma Concolor Coryi),
2012
Environmental and Life Sciences Graduate Program, Trent University
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 …
Demystifying The Cowboy Through His Song: How Cowboy Poetry And Music Create A Common Language Between Multiple-Use Conservationists And Forever-Wild Preservationists To Meet The Goals Of Sustainable Agriculture,
2012
Utah State University
Demystifying The Cowboy Through His Song: How Cowboy Poetry And Music Create A Common Language Between Multiple-Use Conservationists And Forever-Wild Preservationists To Meet The Goals Of Sustainable Agriculture, Kristin Y. Ladd, Roslynn Brain
English Faculty Publications
Though multiple-use conservationists (use the land for multiple purposes) and forever-wild preservationists (solely set aside land for non-human species) seem to be at odds, this article argues that key figures such as Gifford Pinchot and John Muir discredit this perceived discordance. As well, it probes into the unexplored arena of cowboy music gatherings as productive places for cooperation between the two groups. First, mystique of the cowboy is examined and unraveled through true stories of cowboy-environmentalist collaboration. The article addresses how cowboy poetry festivals function as entertainment and meeting places to support sustainable behavior through communitybased social marketing techniques.
Climate Change And The Water Crisis In Israel,
2012
California Polytechnic State University, San Luis Obispo
Climate Change And The Water Crisis In Israel, Lauren Deutsch
Natural Resources Management and Environmental Sciences
Israel’s water crisis is controlled by the availability and location of water resources that are affected by climate change and geopolitics in southwest Asia. Conflict between Israel and the Palestinian occupied territories in the Gaza Strip and the West Bank have put strains on the allocation of water recourses. The goal of this research was to model how much a change in climate will affect the amount of available freshwater in Israel. Intensive research taken from Israel and the occupied territories was carried out to understand how the amount of precipitation, rainfall, and the rate of evaporation is affected by …
Water: Conserving Our Most Precious Resource,
2012
Ditchley Foundation
Water: Conserving Our Most Precious Resource, John Holmes Gcvo, Kbe, Cmg
Reports (USI)
This was a thoughtful discussion on a vital and still neglected issue. While there was enough fresh water in the world overall, its distribution did not match that of the global population. Climate change, continuing population growth, urbanisation and altered dietary habits were all exacerbating existing problems of fresh water availability. But there was little new action at national or international level, though local and private sector decisions were making a difference in some places. In the end we might have to take the water to the people rather than expecting the people to go to the water, as had …
Erosion Vulnerability In The Zarati Subwatershed And Its Impact Of Water Quality,
2012
University of Alabama in Huntsville
Erosion Vulnerability In The Zarati Subwatershed And Its Impact Of Water Quality, Savanna Guelde, Alicia Mata, Troy Atchison
Von Braun Symposium Student Posters
No abstract provided.
The Effects Of Land Cover Change On Water Quality In The Bay Of Parita, Panama,
2012
University of Alabama in Huntsville
The Effects Of Land Cover Change On Water Quality In The Bay Of Parita, Panama, Nikki Wright, Elinor Crook
Von Braun Symposium Student Posters
No abstract provided.
Examining The Impact Of Pau Jacaré (Piptadenia Gonoacantha) Growth On Soil Fertility In The Brazilian Atlantic Rainforest,
2012
Pomona College
Examining The Impact Of Pau Jacaré (Piptadenia Gonoacantha) Growth On Soil Fertility In The Brazilian Atlantic Rainforest, Aleksandra Ponomareva
Environmental Analysis Program Mellon Student Summer Research Reports
The Atlantic Rainforest of Brazil is an area of astounding diversity in both flora and fauna, taking its place among the top five “biodiversity hotspots” in the world. However, in the past 40 or 50 years the area has been increasingly threatened by the presence of humans – approximately 93% of the Rainforest has disappeared as a result of exploitation (Turner 2004). Unsustainable farming practices, as well as logging, cattle ranching and mining activities have caused soil infertility, water depletion, erosion and destruction of ecosystems. This project examines the effects of the Pau Jacaré, Piptadenia gonoacantha, tree on soil health …
Using Slow-Release Permanganate Candles To Remove Tce From A Low Permeable Aquifer At A Former Landfill,
2012
University of Nebraska–Lincoln
Using Slow-Release Permanganate Candles To Remove Tce From A Low Permeable Aquifer At A Former Landfill, Mark D. Christenson, Ann Kambhu, Steve D. Comfort
School of Natural Resources: Faculty Publications
Past disposal of industrial solvents into unregulated landfills is a significant source of groundwater contamination. In 2009, we began investigating a former unregulated landfill with known trichloroethene (TCE) contamination. Our objective was to pinpoint the location of the plume and treat the TCE using in situ chemical oxidation (ISCO). We accomplished this by using electrical resistivity imaging (ERI) to survey the landfill and map the subsurface lithology. We then used the ERI survey maps to guide direct push groundwater sampling. A TCE plume (100-600 µg L-1) was identified in a low permeable silty-clay aquifer (Kh = 0.5 …
