Potential For Climate Induced Methane Hydrate Dissociation, 2018 Pomona College
Potential For Climate Induced Methane Hydrate Dissociation, Graham Macwilliams
Pomona Senior Theses
Methane hydrates are frozen deposits of methane and water found in high pressure or low temperature sediments. When these deposits destabilize, large quantities of methane can be emitted into the atmosphere. This is significant to climate change because methane has 25 times more greenhouse gas potential than Carbon Dioxide. Worldwide, it is estimated there are between 2500 and 10000 gigatons of methane stored in hydrate deposits. This represents more carbon than all fossil fuels on Earth. It is estimated that between 200 and 2000 gigatons of methane are stored in hydrates in Arctic waters acutely vulnerable to greenhouse warming. Over ...
The Second Record Of A Relict Akrav Israchanani Levy, 2007 (Scorpiones: Akravidae) From Levana Cave, Israel, Victor Fet, Michael E. Soleglad, Sergei L. Zonstein, Israel Naaman, Shlomi Lubaton, Boaz Langford, Amos Frumkin
We report the remnants of five new scorpion specimens discovered dead in Levana Cave in Israel in December 2015. We confirm that they belong to the relict scorpion Akrav israchanani Levy, 2007 (Akravidae), famously described from the neighboring Ayyalon Cave, also from dead specimens. The details of morphology of the new specimens are given; they match completely the characters of A. israchanani redescribed by Fet, Soleglad & Zonstein (2011). This second record indicates a wider distribution of this unique cave scorpion, which, however, is extinct in both caves. There is still no evidence that live populations of this species exist.
Hypogenic Versus Epigenic Subterranean Ecosystem: Lessons From Eastern Iberian Peninsula, 2017 Departamento de Ciencias de la Vida, Universidad de Alcalá, Alcalá de Henares, Spain
Hypogenic Versus Epigenic Subterranean Ecosystem: Lessons From Eastern Iberian Peninsula, Alberto Sendra, Policarp Garay, Vicente M. Ortuño, José D. Gilgado, Santiago Teruel, Ana Sofia P.S. Reboleira
Ana Sofia P.S. Reboleira
Over the last 40 years, hypogenic karst/caves have become well known and hypogene speleogenesis has been used to explain the formation of some of the largest subterranean maze caves. These hypogenic systems involve confined aquifers with upwards flow, responsible for their karstification. Such spaces begun and could be remain isolated from the surface and the contiguous subterranean habitats, including the shallow ones. We studied the invertebrate fauna and the geology/speleogenesis of two recently opened caves from Eastern Iberian Peninsula, which clearly showed features of hypogenic origin. Their scarce faunistic composition, formed by non cave-adapted fauna, is similar to ...
Morphological Variation In The Wild-Weedy Complex Of Sorghum Bicolor In Situ In Western Kenya: Preliminary Evidence Of Crop-To-Wild Gene Flow?, James A. Okeno, Evans Mutegi, Santie De Villiers, Jeffrey D. Wolt, Manjit K. Misra
Manjit K. Misra
Crop wild relatives are important components of agroecosystems and have over the years been exploited in breeding programs as sources of genes for novel traits. Information on the extent and patterns of variability is important in formulating effective conservation and utilization strategies for existing crop wild relative populations. We conducted surveys and collections of wild and weedy accessions of Sorghum bicolor (L.) Moench in Lambwe Valley in western Kenya in order to investigate occurrence, distribution, and morphological variability in the wild-weedy complex of S. bicolor under local agroecological conditions. We also attempted to understand the role, if any, of crop-to-wild ...
Relations Between Stream Chemistry, Fish Diversity, And Land Use In The Upper Little Miami Watershed, 2017 Cedarville University
Relations Between Stream Chemistry, Fish Diversity, And Land Use In The Upper Little Miami Watershed, Connor J. Gilmour, Randy Howell, David Paulding, Charles W. Reynolds, Mark A. Gathany
Mark A. Gathany, Ph.D.
Streams are susceptible to numerous threats to their water quality and biodiversity. In southwest Ohio a major driver of these impacts is associated with current agricultural practices and associated legacy effects. These structural and chemical impacts are known to affect biodiversity in these streams. The objective of this study was to document and examine relationships among land-use/land cover, stream chemistry, and fish diversity in the headwaters streams of the Little Miami Watershed. Three streams (Little Miami River, Massies Creek - North Fork, and Massies Creek - South Fork) were sampled in the upper headwaters as well as downstream. Air and water ...
Microananteroides Mariachiarae Rossi Et Lourenço, 2015 Is A Junior Synonym Of Akentrobuthus Atakora Vignoli Et Prendini, 2008 (Scorpiones: Buthidae), 2017 Museo de Historia Natural “Tomás Romay”
Microananteroides Mariachiarae Rossi Et Lourenço, 2015 Is A Junior Synonym Of Akentrobuthus Atakora Vignoli Et Prendini, 2008 (Scorpiones: Buthidae), František Kovařík, Rolando Teruel, Graeme Lowe
The African monotypic scorpion genus Microananteroides Rossi et Lourenço, 2015 and its single species M. mariachiarae Rossi et Lourenço, 2015, from Ghana, are herein demonstrated to be junior synonyms, respectively, of Akentrobuthus Lamoral, 1976 and A. atakora Vignoli et Prendini, 2008 from neighboring Benin. We provide detailed high-resolution color photographs of the holotype of M. mariachiarae and further show its real tri-chobothrial pattern, which was incorrectly depicted in the original description.
Complements To The Taxonomy Of Some Amazonian Scorpions (Scorpiones: Buthidae), 2017 Museo de Historia Natural “Tomás Romay”
Complements To The Taxonomy Of Some Amazonian Scorpions (Scorpiones: Buthidae), Rolando Teruel, František Kovařík, Graeme Lowe, Stefan Friedrich
We describe and illustrate in detail the previously unknown adult male of Ananteris ashaninka Kovařík, Teruel, Lowe et Friedrich, 2015, based upon a specimen recently captured at the type locality. In addition, the taxonomic status of three Amazonian species of the genus Tityus C. L. Koch, 1836, is reevaluated and all are restored from unjustified synonymies: Tityus carolineae Kovařík, Teruel, Cozijn et Seiter, 2013, Tityus dillerorum Kovařík, Teruel, Lowe et Friedrich, 2015, and Tityus wachteli Kovařík, Teruel, Lowe et Friedrich, 2015.
A Good Kiwi Isn't Acidic: How Ocean Acidification Is Affecting The New Zealand Economy, 2017 Fordham University
A Good Kiwi Isn't Acidic: How Ocean Acidification Is Affecting The New Zealand Economy, Lily G. Hurley
Student Theses 2015-Present
In a country that houses a mere 4 million people, it is no wonder that agriculture has become the main facet of New Zealand’s economy. However, while the sheep and produce have flourished from land protection laws, marine life has struggled in recent years due to an increase in oceanic carbon levels. In an area of the Pacific that is so rich in coral reefs, Great White breeding areas, and a plethora of fish species, any upset of the natural preexisting chemical balance has a tangible impact. New Zealand is dealing with a crisis with huge economic and ecological ...
Evolutionary Genetic Aspects Of Host Association In Generalist Ectoparasites, 2017 The University of Western Ontario
Evolutionary Genetic Aspects Of Host Association In Generalist Ectoparasites, Benoit Talbot
Electronic Thesis and Dissertation Repository
Despite the use of the host for dispersal by most parasite species, the extremely loose relationship typical between highly mobile hosts and generalist ectoparasites may lead to very different gene flow patterns between the two, leading in turn to different spatial genetic structure, and potentially different demographic history. I examined how similar gene flow patterns are between Cimex adjunctus, a generalist ectoparasite of bats present throughout North America, and two of its key bat hosts. I first analyzed the continent-scale genetic structure and demographic history of C. adjunctus and compared it to that of two of its hosts, the little ...
Diversity Oriented Synthesis, Characterization And Anti-Cancer Activity Of Killer Peptide Nucleolipid Bioconjugates, Niki K. Rana
Seton Hall University Dissertations and Theses (ETDs)
The killer peptide sequence D-(KLAKLAK)2 has been originally designed and developed as an antibacterial agent. Despite having excellent cytotoxicity towards bacteria, this sequence maintains low cell cytotoxity in malignant mammalian cell types such as cancer. The chemical basis for its selectivity has been attributed to its poly(cationic) amphiphilic nature, which facilitates cell permeability across the negatively charged bacterial membrane, but with limited permeability across the zwitterionic membrane of mammalian cells. The positively charged D-(KLAKLAK)2 sequence has been found to accumulate on the surface of the mitochondria causing dissipation of the negatively charged mitochondrial membrane potential ...
Marine Tardigrades From South Carolina, Usa, 2017 Warren Wilson College
Marine Tardigrades From South Carolina, Usa, Paul J. Bartels, Lilvia J. Bradbury, Diane R. Nelson
Journal of the South Carolina Academy of Science
Until now, there have been only three studies of marine tardigrades from South Carolina, USA. The Fall 2015 invertebrate zoology class from Warren Wilson College collected four sediment samples from Huntington Beach State Park: shallow beach sand, deep beach sand, shallow salt marsh sediment, and deep salt marsh sediment. No tardigrades were found in the salt marsh, but two species were found in the beach samples. Batillipes pennaki Marcus, 1946 was found in shallow and deep beach sand, and three specimens of a potentially new species of Stygarctus Schulz, 1951 were found in the deep beach sand at groundwater level ...
Expanding Access To Biodiversity Literature, 2017 Harvard University
Expanding Access To Biodiversity Literature, Patrick Randall
Digital Initiatives Symposium
Expanding Access to Biodiversity Literature (EABL) is an IMLS-funded grant designed to enhance the collection of the Biodiversity Heritage Library (BHL), a digital library providing open access to over 50 million pages of legacy biodiversity literature.
BHL's collection is built on the digitized holdings of its member libraries, typically large research universities, natural history museums, and other well-funded organizations. EABL, however, solicits content outside the BHL consortium; small organizations that often lack the resources for cataloging and digitization nevertheless have valuable and unique literature to contribute. This has created new challenges for BHL workflows, as well as opportunities for ...
First Record Of Centruroides Alayoni Armas, 1999 (Scorpiones: Buthidae) From Haiti, Greater Antilles, 2017 Marshall University
First Record Of Centruroides Alayoni Armas, 1999 (Scorpiones: Buthidae) From Haiti, Greater Antilles, Luis F. De Armas
Centruroides haitiensis Lourenço, 2016, from Grande Cayemite, Haiti, is regarded as a junior synonym of Centruroides alayoni Armas, 1999, previously known from southern Pedernales Province (215 km east of Grande Cayemite), Dominican Republic. Consequently, C. alayoni is herein recorded for the first time from Haiti. The list of the Haitian species of the genus Centruroides Marx, 1890 is given.
Variation In Density Dependent Seedling Survival Across Forests Of Different Successional Age And Hunting Protection Status, 2017 University of Nebraska-Lincoln
Variation In Density Dependent Seedling Survival Across Forests Of Different Successional Age And Hunting Protection Status, Nohemi Huanca-Nunez
Dissertations and Theses in Biological Sciences
Over 50% of the original extent of tropical forests has been cleared. Restoration of secondary forests is important for maintaining the ecosystem services that mature tropical forests provide. Density dependence (DD) is thought to be a major mechanism for shaping forest community structure and may cause reduced spatial aggregation among individuals of the same species, allowing for maintenance of diversity. While much research has focused on DD in mature tropical forests, few studies have examined how DD may influence community structure in secondary forests, many of which are also exposed to hunting. There are several important agents of negative and ...
Law Library Blog (May 2017): Legal Beagle's Blog Archive, 2017 Roger Williams University
Law Library Blog (May 2017): Legal Beagle's Blog Archive, Roger Williams University School Of Law
Law Library Newsletters/Blog
No abstract provided.
A Framework For Evaluating And Enhancing Resilience Integration In Conservation Policy: The Case Of Massachusetts, Kyle Pilkington
International Development, Community and Environment (IDCE)
This paper develops a framework for evaluating conservation policy from the perspective of integrating resilience, using Massachusetts as a case study. After an intensive literature review on the topics of resilience and conservation, five resilience-enhancing attributes were identified: biodiversity, stakeholder engagement, acknowledgement of climate change, multiple species or species interaction focus and ecosystem or environment health. The framework ranks the policies with respect to the effectiveness of following the resilience-enhancing attributes. Three Massachusetts-based conservation policies, Massachusetts Endangered Species Act (MESA), State Wildlife Action Plan (SWAP) and MassWildlife Habitat Management Grant Program (MHMGP), were chosen to demonstrate the evaluative capacity of ...
Hemichordates As A Model System For Investigating Intertidal Zonation In Soft Sediments, 2017 College of William and Mary
Hemichordates As A Model System For Investigating Intertidal Zonation In Soft Sediments, Kharis R. Schrage
Undergraduate Honors Theses
Intertidal zonation of organisms is well studied on rocky shores but less so in soft sediment communities. On rocky shores, biotic factors such as predation often set the lower bound of a zone, while abiotic factors set the upper bound. Here I describe the zonation of hemichordate worms at two field sites in Maine and Virginia. In Virginia, Saccoglossus kowalevskii occurs in the mid-intertidal zone at densities up to 500 m-2. In Maine, two hemichordate species, Saccoglossus bromophenolosus and Protoglossus graveolens, co-occur at densities approaching 100 m-2. Hemichordates have chemical defenses that appear to deter fish, but ...
Rate Of Vegetation Recovery In Restored Prairie Wetlands, 2017 The University of Western Ontario
Rate Of Vegetation Recovery In Restored Prairie Wetlands, Saloni Salaria
Electronic Thesis and Dissertation Repository
Wetlands are restored to compensate for wetland loss and degradation. To determine the potential rate and success of vegetation recovery in restored wetlands, prairie wetlands of different restoration ages (3 to 23 years since restoration), including drained and natural (embedded within both agricultural and protected landscape), were sampled for vegetation in Alberta, Canada. Vegetation was assessed based on species richness, percentage and cover of hydrophytes, natives and non-natives, and community composition. Analysis of covariance with wetland area as a covariate and non-metric multidimensional scaling results indicated that restored wetlands resembled low-integrity natural wetlands that occurred on agricultural landscapes within 3-5 ...
Do Farm Subsidies Affect Crop Diversification?, 2017 Georgia College
Do Farm Subsidies Affect Crop Diversification?, Chadwick O'Neal
Georgia College Student Research Events
The United States spends $20 billion each year on farm subsidies. Farmers face increased risk and income variation when their crop portfolio is less diversified. It’s possible for farm subsidies to decrease diversification if they are focused on specific crops. Utilizing state level subsidy and agricultural data from the Environmental Working Group, I used econometric analysis to estimate the effect of farm subsidies on crop diversification. I used the number of acres planted from the 15 top most subsidized and grown crops in the United States to derive my dependent variable, the Herfindahl-Hirschman index (HHI). The HHI is a ...
The Influence Of Adjacent Forest And Agriculture On Restored Grassland Diversity And Composition, 2017 The University of Western Ontario
The Influence Of Adjacent Forest And Agriculture On Restored Grassland Diversity And Composition, Rachel A. Chambers
Electronic Thesis and Dissertation Repository
Little native grassland remains in North America due to land-use changes. Conversion to agriculture is a common means of loss. This fragmentation creates edges in the landscape and associated edge effects. Grassland plant communities are susceptible to edge effects, directly via dispersal and indirectly through environment. This study took place in Norfolk County, Ontario, Canada, in a landscape of agriculture, forest, rural development, and patches of grassland restored by Nature Conservancy Canada. I examined restored grassland edges bordering forest and crops. An intensive study at a single site identified spatial and soil environmental influences on plant diversity and composition. I ...