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Spatial And Temporal Distributions Of Young-Of-Year Fish In Carite Reservoir, Puerto Rico, Michael Clinton Lloyd
Spatial And Temporal Distributions Of Young-Of-Year Fish In Carite Reservoir, Puerto Rico, Michael Clinton Lloyd
Theses and Dissertations
Information regarding spatiotemporal trends in young-of-year (YOY) fish distributions gives managers insight into recruitment and ultimately adult population variability. In Puerto Rico, limited research has been conducted on YOY distributions with no studies addressing reservoir systems. A comparison of the efficacy of two sampling gears and an assessment of spatiotemporal distributions of YOY fish communities in a tropical reservoir were conducted. Diversity of catch between push nets and offshore light traps were similar, though species composition of catch was different between gears. Inshore light traps collected greater total numbers and diversities of the YOY fish community than offshore traps in …
Natural Regeneration Dynamics Of Red Oak Seedlings In Mississippi Bottomland Forests, Ellen Marie Boerger
Natural Regeneration Dynamics Of Red Oak Seedlings In Mississippi Bottomland Forests, Ellen Marie Boerger
Theses and Dissertations
Numerous studies highlighted sharp declines in abundance of red oak species (Quercus spp., Section Erythrobalanus) in the southeastern United States. Red oaks are major components of bottomland forests, provide important ecological services, and are a critical source of hard mast for wildlife and high-value timber (Oliver et al. 2005). Bottomland hardwoods are usually managed with natural regeneration, and maintaining a component of red oak can challenge forest managers, given sporadic acorn production (masting behavior), and lack of advance regeneration establishment prior to disturbance. This study investigated the development of hardwood advance regeneration in relation to understory light availability and stand …
Plant Community Response To Reduced Mowing Regimens Along Highway Right-Of-Ways In Northeastern Mississippi., Edward D. Entsminger
Plant Community Response To Reduced Mowing Regimens Along Highway Right-Of-Ways In Northeastern Mississippi., Edward D. Entsminger
Theses and Dissertations
I investigated percent coverage, plant height, species richness, and woody stem density in plant communities in ten study plots during spring and fall (2010-2012) within 3 different treatments (continual mowings, one fall mowing, and one fall mowing with native wildflower seeds) on highway 25 right-of-way in Oktibbeha and Winston counties, Mississippi. I recorded 277 plant species including native and non-native forbs, legumes, grasses, rushes/sedges, and woody plants. Non-native agronomic grasses exhibited greatest coverage greater than 90 percent occurring in all treatments. Percent coverage of plants less than 0.46m height category exceeded 100 while, greater than 0.46m plant height categories averaged …
Winter Waterbird Use And Food Resources Of Aquaculture Lands In Mississippi, James Stephen Feaga
Winter Waterbird Use And Food Resources Of Aquaculture Lands In Mississippi, James Stephen Feaga
Theses and Dissertations
The conversion of wetland systems to aquaculture provides alternate aquatic habitats for a variety of waterbirds. In response to the 2010 British Petroleum oil spill, the National Resource Conservation Service (NRCS) enacted the Migratory Bird Habitat Initiative (MBHI) through which NRCS partnered with landowners to provide additional wetlands and associated foraging habitat for migrating waterbirds. During winters 2011–2013, I estimated abundances of waterbirds, seeds, and invertebrates in six production and idled aquaculture facilities in the Mississippi Alluvial Valley. Wintering waterbirds exhibited similar densities on production (i.e., ~22 birds/ha) and idled (i.e., ~20 birds/ha) MBHI sites. My results suggest production and …
Economic Impacts Of Fishing, Hunting, And Wildlife-Associated Recreation Expenditures Across The U.S. South, Jagdish Poudel
Economic Impacts Of Fishing, Hunting, And Wildlife-Associated Recreation Expenditures Across The U.S. South, Jagdish Poudel
Theses and Dissertations
Fishing, hunting and wildlife-associated recreation expenditures have played an important role in the U.S. economy. The 2006 U.S. Fish and Wildlife Service survey reported 87.5 million people participated in wildlife-associated recreation activities, spending $122.4 billion on trips and equipment in U.S. Periodic assessment of economic impact of wildlife associated recreation provides a consistent perspective for forest and wildlife resource management. This research used input-output analysis to evaluate the economic impacts of wildlife associated recreation expenditures in the U.S. South. IMPLAN models were developed for each state to determine the direct, indirect and induced effects of these expenditures. The comparison revealed …
Thermodynamic Characterization Of Linker Histone Binding Interactions With Ds-Dna, Venkata Ramana Machha
Thermodynamic Characterization Of Linker Histone Binding Interactions With Ds-Dna, Venkata Ramana Machha
Theses and Dissertations
Linker histones (H1) are the basic proteins in higher eukaryotes that are responsible for the final condensation of chromatin. H1 also plays an important role in regulating gene expression. H1 has been described as a transcriptional repressor as it limits the access of transcriptional factors to DNA. Linker histone binds to DNA that enters or exits the nucleosome. Several crystal structures have been published for the nucleosome (histone core/DNA complex), and the interactions of the core histone proteins with DNA are well understood. In contrast the location of the linker histone and its interactions with ds-DNA are poorly understood. In …
Transposable Element Content In Non-Model Insect Genomes, Christine A. Lavoie
Transposable Element Content In Non-Model Insect Genomes, Christine A. Lavoie
Theses and Dissertations
While the study of transposable element evolution has been conducted in several model insect organisms such as Anopheles gambiae, Drosophila melanogaster, and Bombyx mori, little investigation has been conducted into the transposable element (TE) evolution within less commonly examined model and non-model taxa within Diptera. In this work we contributed two analyses to close this gap. First, TEs in the lepidopteran, Heliconius melpomene, were characterized, and it was determined that 25% of the genome is composed of TEs. Second, TEs in oestroid and muscid flies were characterized using survey sequencing rather than whole genomes. Comparative analyses were performed on Haematobia …
Upper Range Thermal Stress Tolerance In Channel And Hybrid Catfish Strains, Heather Ann Stewart
Upper Range Thermal Stress Tolerance In Channel And Hybrid Catfish Strains, Heather Ann Stewart
Theses and Dissertations
Channel catfish (Ictalurus punctatus) have a broad distribution from Canada to Mexico, suggesting that different strains may have different thermal tolerances. In aquaculture, daily temperature maximums up to 36-40°C and fluctuations of 3-6°C occur, and may be exacerbated by future climate change. To quantify differences in thermal tolerance amongst geographically-distinct channel catfish strains and corresponding hybrid catfish (I. punctatus x [blue catfish] I. furcatus): acute critical thermal maximum (CTmax), and the effects of chronic thermal regimes on growth, survival and differential gene expression were examined. Southern channel catfish had higher CTmax than northern, and channel catfish had higher CTmax than …
Using Transposable Elements As Tools To Better Understand Evolution At The Genomic Level, Roy Nelson Platt Ii
Using Transposable Elements As Tools To Better Understand Evolution At The Genomic Level, Roy Nelson Platt Ii
Theses and Dissertations
Transposable elements (TEs), also known as jumping genes, are DNA sequences capable of mobilizing and replicating within the genome. In mammals, it is not uncommon for 50% of the genome to be derived from TEs, yet they remain an underutilized tool for tracking evolutionary change. With the increasing number of publicly funded genome projects and affordable access to next-generation sequencing platforms, it is important to demonstrate the role TEs may play in helping us understand evolutionary patterns. The research presented herein utilizes TEs to investigate such patterns at the genomic, specific, and generic levels in three distinct ways. First at …
Speleothem Strontium Concentrations In Eogenetic Carbonates, Nicole Marie Ridlen
Speleothem Strontium Concentrations In Eogenetic Carbonates, Nicole Marie Ridlen
Theses and Dissertations
Three questions were asked during this research. 1) Does the Sr content of Caribbean speleothems have a direct relationship with the age of the host rock at the time of speleothem precipitation?; 2) do older speleothems contain less Sr than younger speleothems in the same climatic setting?; and 3) will speleothems record the change in Sr concentration of eogenetic carbonates as a faster depletion in climates of higher precipitation as opposed to drier climates? The speleothems and cave rocks in this study were analyzed with various methods in an attempt to understand the rock processes that affect speleothem Sr concentrations. …
Study Of Viruses Associated With Blackberry Yellow Vein Disease In Mississippi, Pratibha Ghimire
Study Of Viruses Associated With Blackberry Yellow Vein Disease In Mississippi, Pratibha Ghimire
Theses and Dissertations
Blackberry yellow vein disease (BYVD) is the most important virus disease of blackberry in the Southeastern United States. In order to determine viruses in BYVD-affected plants in Mississippi we tested a total of eighty one symptomatic cultivated and wild blackberries collected from different locations for infections by nine different viruses. All tested viruses were present in diseased samples at various rates, with the exception of Rubus canadensis virus 1. Blackberry yellow vein associated virus is prevalent virus in Mississippi, infecting 70% of tested samples, followed by Tobacco ringspot virus. The second part of this research focused on molecular and phylogenetic …
Synthesis Of Bio-Based Polymers Containing D-Isosorbide By Ring-Opening Metathesis Polymerization, Chinni Yalamanchili
Synthesis Of Bio-Based Polymers Containing D-Isosorbide By Ring-Opening Metathesis Polymerization, Chinni Yalamanchili
Theses and Dissertations
The utilization of renewable sources as alternatives for petroleum and natural gas products has immense commercial, health and global warming significance. D-Isosorbide (2) is a bifunctional, polar, chiral and rigid molecule, which is produced from renewable sources. Synthesis of new polymers containing 2 is of interest for polymers and in drug delivery. The aim of the present work is to synthesize various polymers (homo- and copolymers) containing 2 via the olefin metathesis routes, ring-opening metathesis polymerization (ROMP) and acyclic-diene metathesis polymerization (ADMET). N-Phenyl-7-oxanorbornene-dicarboximide, and norbornene functionalized onto 2 were used as the monomers for ROMP. These monomers were polymerized using …
Individual Tree Growth And Yield Models For Red Oak - Sweetgum Stands On Mid-South Minor Stream Bottoms Producing Volume By Log Grade, Jonathan Paul Jeffreys
Individual Tree Growth And Yield Models For Red Oak - Sweetgum Stands On Mid-South Minor Stream Bottoms Producing Volume By Log Grade, Jonathan Paul Jeffreys
Theses and Dissertations
Bottomland hardwood stands of the Mid-South region of the United States are some of the most productive forests in the country. A large percentage of these stands are owned by nonindustrial private forest landowners, who have little information on which to base management decisions. These stands are, therefore, a largely unmanaged and under-utilized reserve of high quality hardwoods. To provide landowners with a decision-making tool for comparing management scenarios, a growth and yield study was initiated in 1981. One hundred and fifty permanent plots were installed in red oaksweetgum stands. The study has been remeasured three times over the past …
Influence Of Coastal Processes On Speleogenesis And Landforms In The Caribbean Region, Patricia Kambesis
Influence Of Coastal Processes On Speleogenesis And Landforms In The Caribbean Region, Patricia Kambesis
Theses and Dissertations
Evolution of rocky coastlines is controlled by littoral, biological and fluvial processes. Resultant landforms are overprinted and/or new ones formed as a result of changes in sea level caused by glacioeustasy and/or local tectonics. On carbonate coasts, chemical erosion in the form of karstification takes on a dominant role. Type of karstification is an important factor in understanding carbonate coast evolution and landform development so it is critical to identify type of karstification. In this research, fractal indices were used to distinguish cave and thus karstification type. It was determined that fractal indices effectively differentiated cave types and the indices …
Insights On Protein Structure And Dynamics From Temperature-Dependent Molecular Dynamics And Normal Mode Analysis, Habib Ur Rehman
Insights On Protein Structure And Dynamics From Temperature-Dependent Molecular Dynamics And Normal Mode Analysis, Habib Ur Rehman
Theses and Dissertations
In this thesis we have employed two computational approaches, temperature-dependent molecular dynamics (MD) and normal mode analysis (NMA), to gain insights into the structureunction relationships between three structurally-related proteins, each possessing a central alpha/beta core. The three proteins studied here are: pnbCE from Bacillus subtilis, cutinase from Fusarium solani - both belong to the serine hydrolase family - and TTHA1554, from the thermophile Thermus thermophilus. Mutations at the gate residue 362, located at the side-door of the pnbCE enzyme, are known to alter the catalytic activity of this enzyme. In this work the modifications induced by mutating LEU362 on the …
Livelihood Strategies And Lifestyle Choices Of Fishers Along The Mississippi Gulf Coast, Sarah A. Harrison
Livelihood Strategies And Lifestyle Choices Of Fishers Along The Mississippi Gulf Coast, Sarah A. Harrison
Theses and Dissertations
This study was initiated to assess the biological, ecological and sociological aspects of the blue crab, Callinectes sapidus, fishery associated with the Pascagoula River Estuary in southern Mississippi. Household surveys were conducted in the cities of Moss Point and Pascagoula, Mississippi, September 2010 to September 2011, to identify, describe and classify subsistence fishing activities associated with the estuary. A stock assessment of blue crab was conducted to determine how biological and environmental variability affect the people engaged in this subsistence fishery. The study revealed two types of subsistence fishing occurring in the Moss Point/Pascagoula area. The first type involves fishing …
Mechanical And Cultural Practices To Reduce Skinning In Sweetpotato, Bradley Hodge Hayes
Mechanical And Cultural Practices To Reduce Skinning In Sweetpotato, Bradley Hodge Hayes
Theses and Dissertations
Sweetpotato (Ipomoea batatas (L.) Lam.) is one of the major tropical root crops of the world and it is widely distributed throughout the tropical and temperate regions of Africa, Asia and the Americas. During harvest and post-harvest handling, the skin can be separated from the underlying tissue of the storage root. Storage root damage contributed to income losses for producers. To minimize these loses, producers set the skin of the sweetpotato by removal of the vines prior to harvest. New mechanical (undercutting) and cultural (biochar) methods were developed and tested. Mechanical undercutting would sever the feeder roots of the plant …
Metabolic Health And Academic Achievement In At Risk Youth Participating In Studio Based Summer Camp, Mallory Anne Kvasnicka
Metabolic Health And Academic Achievement In At Risk Youth Participating In Studio Based Summer Camp, Mallory Anne Kvasnicka
Theses and Dissertations
Childhood obesity and subsequent poor health implications continue to be a critical health concern and recent literature suggests academics may also be under greater strain among these individuals. This study examined the relationship between metabolic health and academic achievement in students “at risk” for drop. Fifteen adolescences participated in an educational camp aimed at developing knowledge of core curriculum by developing design projects. Metabolic health was assessed via biochemical measurements of blood lipid and glucose, resting blood pressure, and anthropometric measurements of height, weight, and waist circumference. Variables were examined individually and as a combined risk score. Academic achievement measurements …
Microtubule Dynamics, Kinetochore Number, And Kinetochore Distribution In Cells Undergoing Mitosis With Unreplicated Genomes, Manuella Rossette Clark-Cotton
Microtubule Dynamics, Kinetochore Number, And Kinetochore Distribution In Cells Undergoing Mitosis With Unreplicated Genomes, Manuella Rossette Clark-Cotton
Theses and Dissertations
In cells undergoing mitosis with unreplicated genomes (MUG), anaphase is successfully initiated despite the abundance of kinetochores that are attached to microtubules emanating from both spindle poles (merotely). In cultured cells, merotely is associated with lagging at the metaphase plate. Treatment with microtubule-perturbing drugs alters the frequency of lagging, but the effect of these drugs on MUG cells is unclear. In this study, low doses of a microtubule-stabilizing drug, taxol, or a microtubule-destabilizing drug, nocodazole, dramatically increased the frequency of lagging kinetochores in the midbody of MUG daughter cell pairs. Likewise, increasing the kinetochore number increased the frequency of lagging …
Genotype, Nitrogen And Harvest Management Effects On Switchgrass Production, Ramdeo Seepaul
Genotype, Nitrogen And Harvest Management Effects On Switchgrass Production, Ramdeo Seepaul
Theses and Dissertations
Use of switchgrass (Panicum virgatum L.) as a forage and feedstock species requires knowledge of fertilizer application rates and harvest timing to optimize yield and quality. Three experiments were conducted at the Brown Loam Branch Experiment Station, Raymond, MS to quantify nitrogen rates, harvest timing, and genotype effects on biomass, nutrient removal, chemical composition and ethanol yield. Dry matter yield varied with N rate, genotype, harvest frequency and timing. Yields among genotypes were: NF/GA992 = NF/GA001 (13.7 Mg ha-1) > Alamo (11.6 Mg ha-1) > Cave-in-Rock (6.1 Mg ha-1). A single (9.5 Mg ha-1) or two harvests annually (10.3 Mg ha-1) produced …
Growth Models And Profile Equations For Exotic Tallow Tree (Triadica Sebifera) In Coastal Mississippi, Nana Tian
Theses and Dissertations
Chinese tallow tree (Triadica sebifera (L.)) has become a threat to Southern United States forestlands because of the rapid colonization. To explore the growth rate of tallow, numerous growth models were constructed with destructive sampling method from oak-gum-cypress (Quercus/Liquidambar styraciflua/Taxodium distichum) and longleaf/slash pine (Pinus taeda/ Pinus echinata) forests in southern Mississippi. Moreover, stem profile was also fitted with segmented profile models: Max and Burkhart (1976), Cao (2009) modified Max and Burkhart, and Clark et al. (1991). Numerous results showed that: 1) diameter at breast height, volume and biomass of tallow grew faster in oak-gum-cypress forest while height grew faster …
Identification Of The Edwardsiella Ictaluri Genes Causing Impaired Growth In Complex Medium, Safak Kalindamar
Identification Of The Edwardsiella Ictaluri Genes Causing Impaired Growth In Complex Medium, Safak Kalindamar
Theses and Dissertations
Edwardsiella ictaluri is the causative agent of enteric septicemia of catfish (ESC). Although some virulence mechanisms in E. ictaluri have been identified, further research is needed to discover new virulence genes, which could be used to develop safe and efficacious live vaccines. Here, we report production of growth deficient E. ictaluri mutants on complex agar media and identification of genes causing this growth deficiency. The overall goal of this project is to generate growth deficient E. ictaluri mutants and identify genes causing this growth deficiency on complex media. Mutants exhibiting slow growth in complex media may be potential candidates for …
Identifying Adopters Of Best Management Practices Within Mississippi Beef Producers And The Reasons For Non-Adoption, M Scott Cagle
Identifying Adopters Of Best Management Practices Within Mississippi Beef Producers And The Reasons For Non-Adoption, M Scott Cagle
Theses and Dissertations
The goal of the Mississippi State University Extension Service (MSU-ES) is to improve the quality of life for all Mississippians. One specific group that agricultural change agents work with at the county level is beef producers. Grazing lands have received much attention over the last few years regarding environmental concerns and Best Management Practices (BMPs) for beef cattle operations. The adoption of these practices was voluntary during the time this study was conducted, however; adoption was highly encouraged by the MSU-ES and the Natural Resources Conservation Service (NRCS). By knowing the level of adoption of BMPs that Mississippi beef producers …
Evaluation Of Sediment And Nutrient Loss During The Revegetation Of Mississippi Roadsides, Kyle R. Briscoe
Evaluation Of Sediment And Nutrient Loss During The Revegetation Of Mississippi Roadsides, Kyle R. Briscoe
Theses and Dissertations
Runoff during the revegetation of roadsides can transport sediment and nutrients offsite, leading to surface water quality reductions. Two field experiments were conducted near Starkville, MS in 2011 and 2012 to evaluate the influence of N and P sources and rates, fertilization timing, and mulch type on vegetative establishment and nutrient and sediment runoff losses. Stainless steel runoff frames (0.75 x 2.0 m) were installed on 10% and 15% slopes for Experiment I and Experiment II, respectively. A bahiagrass (Paspalum notatum Flugge), tall fescue [Schedonorus arundinaceus (Schreb.) Dumort., nom. cons.], sericea lespedeza [Lespedeza cuneata (Dum. Cours.) G. Don], and common …
Feasibility Of Consistently Estimating Timber Volume Through Landsat-Based Remote Sensing Applications, Renaldo Josue Salazar Arroyo
Feasibility Of Consistently Estimating Timber Volume Through Landsat-Based Remote Sensing Applications, Renaldo Josue Salazar Arroyo
Theses and Dissertations
The Mississippi Institute for Forest Inventory (MIFI) is the only cost-effective large-scale forest inventory system in the United States with sufficient precision for producing reliable volume/weight/biomass estimates for small working circle areas (procurement areas). When forest industry is recruited to Mississippi, proposed working circles may overlap existing boundaries of bordering states leaving a gap of inventory information, and a remote sensing-based system for augmenting missing ground inventory data is desirable. The feasibility of obtaining acceptable cubic foot volume estimates from a Landsat-derived volume estimation model (Wilkinson 2011) was assessed by: 1) an initial study to temporally validate Landsat-derived cubic foot …
Fiber Loop Ringdown Gas Flow And Humidity Sensors, Haifa Hassan Alali
Fiber Loop Ringdown Gas Flow And Humidity Sensors, Haifa Hassan Alali
Theses and Dissertations
Fiber optics has been utilized in fiber optic, sensing technology, imaging optics, communications, etc. Fiber optic sensors have been developed to sense in many applications. In this thesis, fiber loop ringdown (FLRD) sensors were used to monitor two different physical sensors, such as gas flow and humidity. FLRD gas flow sensors were demonstrated. Two different sensor configurations were constructed to monitor airflow (AF). FLRD-AF sensor was based on micro-bending mechanism. The FLRD-AF sensor was able to detect AF in a range of 5 to 22.5 slpm. FLRD technique was also used to measure relative humidity (RH). A sensor was fabricated …
Middle School Transition: Faculty And Parent Perceptions Of The Academic, Procedural, And Social Changes That Occur Between Elementary And Middle School, Barbara Mckeon
Seton Hall University Dissertations and Theses (ETDs)
This purpose of this study was to investigate the perceptions of parents and faculty regarding the transition from a private special education school to the middle school environment. Research was conducted using a mixed methods design to investigate the attitudes and perceptions of those directly involved with the transition process. Seventeen participants, nine parents and eight faculty participated in both the interviews and questionnaire processes. Social competence, academic competence, procedural challenges, maturational readiness and program planning were dominant themes in this study. The study examined the academic, procedural and social changes that occur in middle school from the stage-environment fit …
Identification And Characterization Of Phytoplankton In Barnegat Bay, New Jersey, Nicole L. Elia
Identification And Characterization Of Phytoplankton In Barnegat Bay, New Jersey, Nicole L. Elia
Seton Hall University Dissertations and Theses (ETDs)
Barnegat Bay is a marine estuary that encompasses 670-square miles of the eastern coast of New Jersey. The bay serves as a home to thousands of species of plants, animals, and microorganisms. During the summer months, the population of the bay increases from 576,000 to over 1.5 million residents. In 2011, the Barnegat Bay Partnership reported that environmental conditions of the bay are declining due to increased pollutants from nutrient fertilizers and runoff. Increased nitrogen levels have led to eutrophication and proliferation of phytoplankton algal blooms. Harmful algal blooms (HABs) cause a decrease in dissolved oxygen levels in the water …
Detection Of Pahs In Commercial And Wild Caught Fish Oil Using Scanning Fluorescence Spectroscopy, Edwin Antonio Pena
Detection Of Pahs In Commercial And Wild Caught Fish Oil Using Scanning Fluorescence Spectroscopy, Edwin Antonio Pena
Seton Hall University Dissertations and Theses (ETDs)
The DeepWater Horizon (DWH) oil spill contaminated a large area in the Gulf of Mexico in summer 2010. It is likely that many aquatic species in the Gulf were affected by the spill. Crude oil contains polycyclic aromatic hydrocarbon (PAHs). Some PAHs are carcinogenic to fish and humans. The purpose of this project was to develop menhaden fish oil as a biomonitoring tool for crude oil contaminants such as PAHs using scanning fluorescence spectroscopy (SFS). Menhaden (Genus Brevoortia) is one of the most ecologically and economically important marine fish species along the Atlantic and Gulf coast; however, it is …
Surface To Subsurface Correlation Of The Shublik Formation: Implications For Triassic Paleoceanography And Source Rock Accumulation, Eric M. Hutton
Surface To Subsurface Correlation Of The Shublik Formation: Implications For Triassic Paleoceanography And Source Rock Accumulation, Eric M. Hutton
Geosciences
The Middle to Late Triassic Shublik Formation in northern Alaska is the dominant source rock for Prudhoe Bay, the largest conventional hydrocarbon accumulation in North America, and is being studied as an unconventional reservoir because of recent shale oil exploitation in North America. This heterogeneous shale unit in the subsurface of northern Alaska provides insight on the evolution of upwelling systems during relative sea level change over geologic time. The accumulation, dilution, and more importantly preservation of organic matter are linked to relative changes in sea level, shelf bathymetry and paleoredox conditions. Multiple well correlations and isochore maps indicate thickness …