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Dissertations / Theses on the topic 'San Salvador Island, Bahamas'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Walker, Adam Dennis. "Bahamian Cave and Karst Geodatabase, and GIS Analysis of San Salvador Island, Bahamas." MSSTATE, 2006. http://sun.library.msstate.edu/ETD-db/theses/available/etd-05232006-160705/.

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A geodatabase and a data management program have been created to store and manipulate cave and karst feature data from the Bahamas. A geographic information system was used to recognize any spatial patterns in the cave and karst data from San Salvador Island. Elevation data for banana holes, vadose pits and flank margin caves were obtained from a digital elevation model and are consistent with values predicted by the Carbonate Island Karst Model. The slope and aspect of the hill on which a flank margin cave is found showed no relationship to cave sizes and shapes, emphasizing the hypogenic nature of flank margin caves. The digital elevation model further demonstrated the position of lakes on San Salvador Island during the last interglacial (OIS 5e) highstand, and the lack of flank margin caves along the shores of these lakes provides evidence for a paleoclimate on San Salvador Island similar to today?s.

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2

Dalman, Mark R. "Paleotempestology and Depositional History of Clear Pond, San Salvador Island, Bahamas." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1259729072.

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3

Blauvelt, Kyle C. "Evaluation of Volume Determinations for Modern Hypogene Karst Voids, San Salvador, Bahamas." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1329419705.

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4

Russell, Jr Scot Allan. "Analysis of Fresh Water Resources at the Line Hole Well Field, San Salvador Island, the Bahamas." TopSCHOLAR®, 2010. http://digitalcommons.wku.edu/theses/164.

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A major economic constraint in the Bahamas, and other small carbonates islands world-wide, is the lack of fresh water resources. To combat these socio-economic problems on San Salvador Island I sought to gain a more detailed understanding of the extent, behavior, and controls on the island’s fresh-water lens. DC electrical resistivity tomography and time-series geochemical data are used to study the fresh water lens at the Line Hole well field. Electrical Resistivity profiles are used to image the extent of fresh water resources. Time-series geochemical data provide information on the behavior of the fresh water resources as a function of time. The inversion models of the electrical resistivity profiles illustrate a fresh water lens less than 3 meters thick on average. The mixing zone is diffuse in nature, and substantially thicker than the fresh water lens. The geochemical results corroborate the fresh water lens dimensions predicted by the electrical resistivity model. In addition, mixed semi-diurnal and spring/neap tidal cycles are the primary control on the water level. Statistical analysis of specific conductance and temperature illustrate a positive and negative correlation with water level, respectively. Analysis of precipitation with respect to water level and geochemistry indicate low effective recharge rates during the period of study. The current state of the water resources at the Line Hole well field is strained. Despite moderate levels of freshening since the termination of pumping in December 2006; the system continues to be in a state of disequilibrium. The problem is compounded by abnormal thickening of the mixing zone due to communication of the well field with the ocean, and a limited volume of fresh water. In conclusion, the two techniques used in conjunction provide a non-invasive method of estimating fresh water resources in this type of setting. Conversely, the high RMS and L2 values for the electrical resistivity models and limited time-series data create a high level of uncertainty in the interpretation of results.

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5

Sipahioglu, Sara M. "Tracking storms through time event deposition and biologic response in Storr's Lake, San Salvador Island, Bahamas /." Akron, OH : University of Akron, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1227031927.

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Thesis (M.S.)--University of Akron, Dept. of Geology, 2008.
"December, 2008." Title from electronic thesis title page (viewed 12/13/2009) Advisor, Lisa E. Park; Faculty Readers, Ira D. Sasowsky, John Peck; Department Chair, John P. Szabo; Dean of the College, Ronald F. Levant; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.

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6

Sipahioglu, Sara M. "Tracking Storms through Time: Event Deposition and Biologic Response in Storr’s Lake, San Salvador Island, Bahamas." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1227031927.

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7

Bunt, Thomas M. "Reproductive isolation and genetic divergence in a young "species flock" of pupfishes (Cyprinodon sp.) from San Salvador Island, Bahamas." Connect to this title online, 2001. http://scholar.lib.vt.edu/theses/available/etd-02122002-153708/.

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8

Bunt, Thomas Michael. "Reproductive Isolation and Genetic Divergence in a Young "Species Flock" of Pupfishes (Cyprinodon sp.) from San Salvador Island, Bahamas." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/31212.

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The study of the process of speciation is instrumental to understanding the species diversity observed today. Diverging populations are intriguing, because speciation has not reached an endpoint, yet the process that may eventually lead to distinct species can be studied. Systems that contain many putative species and/or parallel divergences, such as many species flocks and species pairs, are extraordinary examples of divergence and therefore are critical to the understanding of the speciation process. A "miniature" species flock of pupfish (Cyprinodon variegatus) discovered in lakes on San Salvador Island, Bahamas has evolved in less than 6 000 years, and is, therefore, important to the study of the pace of evolutionary processes. The San Salvador Island pupfish flock is composed of a normal form, which resembles coastal C. variegatus, and bulldog and bozo morphs, which diverge ecologically and morphologically from the normal morph. In Chapter 1, I sequenced the mtDNA control region and used haplotype frequency analyses to assess the level of differentiation between sympatric normals and bulldogs sampled from Osprey Lake and Little Lake on San Salvador Island. The bozo morph was too rare to include in the study. I also included samples of normals that occur in lakes without bulldog and bozo morphs to assess any differences between lakes on the island. All haplotype frequency comparisons for sympatric normals and bulldogs were highly significant, which suggests these morphs are distinct populations in sympatry and, therefore, have characteristics of biological species. Further, an estimation of Time for Speciation supports geological data that suggest this fauna is very young (6 000 years). The San Salvador Island pupfish species flock is, therefore, the youngest known species flock and presents an important model system for the study of how morphological and ecological divergence can promote speciation in Cyprinodon. In Chapter 2, I first compared the San Salvador Island pupfishes to other Bahamian C. variegatus populations to assess the level of inter- and intra-island pupfish population differentiation in the Bahamas. The mtDNA control region was sequenced for bulldogs and normals from San Salvador Island and normals sampled from New Providence and Exuma Islands. San Salvador Island bulldogs were found to be distinct from all normal populations sampled, and comparisons of shared haplotypes suggest they originated on San Salvador Island rather than any of the other islands sampled. This was intriguing, because a "bulldog-like" morph has recently been observed in a lake on New Providence Island, which suggests parallel divergences may be occurring throughout the Bahamas. I also sequenced the mtDNA cytochrome b gene to assess the phylogeography of C. variegatus. Populations were sampled from the Bahamas and the east coast of North America, and the results suggest the Bahamas were only recently colonized by the Southern coastal lineage of C. variegatus. A distinct Northern lineage of C. variegatus, which may warrant species designation, was also supported by the cytochrome b data. Overall, the results supported a San Salvador Island origin for the Little Lake and Osprey Lake bulldog morphs, and also suggest the Bahamian C. variegatus populations are very young.
Master of Science

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9

Wittmer, Jacalyn M. "Quantitative approaches and applications to the sequence stratigraphy and biodiversity of Pleistocene – Holocene mollusk communities from the Po plain, Italy and San Salvador Island, the Bahamas." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/56637.

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The following chapters presented here use modern ecological data and modern marine systems to evaluate past marine depositional settings and the preservation potential of various environments in the geological record. While the chapters in this dissertation vary in terms of study area, sedimentary systems (carbonate vs. siliciclastic), depositional environment, and organisms, all projects are based on developing and using quantitative models to evaluate the present as a means for understanding the past. Chapter one focuses on the preservation potential of rocky intertidal environments. The rocky intertidal zone is one of the most poorly preserved fossil-rich environments in the geological record. However in most coastal marine habitats today, it is one of the most diversity rich environments. Chapter one also focuses on the analytical advantages of hierarchical sampling of gastropod communities across San Salvador Island, the Bahamas to quantify community and species level preservation potential in rocky shore environments. Chapters two and three are based on the fossil-rich sedimentary deposits from the Po coastal plain in northeastern Italy. These deposits have been widely studied in terms of their sedimentology and stratigraphy, resulting in a highly resolved sequence stratigraphic architecture. The integration of sequence stratigraphy with paleobiology can enhance our understanding of spatiotemporal biotic patterns recorded in the fossil record. Used in conjunction with the highly-resolved stratigraphic framework, biotic patterns can be used to assess depositional cycles and bathymetry through time. Chapter two integrates sequence stratigraphic patterns and paleoecological data to develop bathymetric models across fossiliferous marine successions of the Po coastal plain, Italy. Chapter three evaluates the modern ecological dataset used to derive the bathymetric models. The last chapter also explores water depth distribution for selected taxa recorded in the Quaternary sediments and observed in present-day habitats. The dissertation research explored here demonstrates that modern ecological systems are essential to evaluating past geologic events. Through direct observation and quantitative analysis, I have learned that modern and fossil communities behave differently depending on environment (e.g. energy, salinity, water depth, etc.). These variables affect the distribution of living organisms today and through my research, delineate fossil distributions through time. With these observations, new questions have arisen about the latitudinal variability of rocky intertidal fossil preservation and extrapolating the quantitative bathymetric models to deeper time intervals. These questions will lead to future endeavors and pointedly add to the field of geology and stratigraphic paleobiology.
Ph. D.

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10

Wogsland, Brittan Valhalla. "Organomineralization of Microbialites from Storr’s Lake, San Salvador Island, Bahamas: Calcium Stable Isotope Analysis using TIMS and a ⁴²Ca-⁴³Ca double spike." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587723502946554.

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11

Michelson, Andrew V. "Ecological, Taphonomic, and Paleoecological Dynamics of an Ostracode Metacommunity." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1341597923.

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12

Buchan, Olivia Claire Lewis Ronald D. "Relationships between large benthic foraminifera and their seagrass habitats, San Salvador, Bahamas." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/BUCHAN_OLIVIA_31.pdf.

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13

Holman, Krista Elaine. "The effects of sewage effluent on macroalgal and seagrass abundance, dry weight and diversity within Grahams Harbor, San Salvador, Bahamas." Miami University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=miami1176261511.

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14

Markert, Kaleb Robert. "Depositional Analysis of a Holocene Carbonate Strand Plain Using High Resolution GPR, Sediment Analysis, and C-14 Dating." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7751.

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Understanding modern carbonate depositional systems gives valuable insights into the interpretation of ancient carbonate systems. Ancient carbonate strand plains have the potential to act as productive hydrocarbon reservoirs because of their relatively high porosity. Unfortunately, they are difficult to identify in the rock record because of the lack of work done on modern analogues. San Salvador Island in the Bahamas hosts a well-exposed and easily accessible Holocene strand plain, ideal as a modern analogue. Sandy Hook, located on the southeast part of the island, consists of approximately 35 ridge-swale features that show signs of four distinct zones of deposition. In this study, 20 sediment samples were collected from one meter in depth, and throughout each zone. The sediment analysis reveals remarkably consistent grain-size distributions across the four zones. Carbon-14 ages were taken from the sediment samples. They revealed ages decreasing from 2617 ± 188 YBP to modern moving seaward through zone 4. The ages reveal depositional rates of 0.08 to 0.29 meters of accretion per year. Four pseudo-3D GPR surveys were acquired in Zones B, C, and D, and a 2D GPR survey was acquired that spanned the three zones. The pseudo-3D surveys revealed consistent reflectors through the width of the survey indicating that the 2D surveys represent more than the single line. The 2D survey reveals semi-parallel seaward-dipping reflectors (representing fair-weather deposits) that are truncated by sigmoidal seaward-dipping reflectors (high-energy storm deposits). Indicating that Sandy Hook was built through both fair-weather deposits and high-energy storm events.

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15

Cerajewski, Rebecca J. "Paleoclimate reconstruction using isotopic analysis of tropical bivalves from the Pigeon Creek archaeological site, San Salvador Island, Bahamas." 2002. http://purl.galileo.usg.edu/uga%5Fetd/cerajewski%5Frebe%5Fj%5F200212%5Fms.

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16

Tsai, Yi-Fan, and 蔡逸凡. "Searching for The Archaeological Remains of The Todos los Santos, City of San Salvador in Hoping Island with Shallow Subsurface Geophysics Method." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/89640972186332975269.

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碩士
國立臺灣海洋大學
應用地球科學研究所
101
As the progress of scientific knowledge and technology, the study in ancient sites with geophysical method is widely documented since 1940s. GPR is one of the non-invasive geophysical methods which provide rapid and high-resolution measurements in the shallow subsurface for anthropogenic objects. Therefore it can serves as a guiding tool for possible excavation locations for archaeological surveys. City of San Salvador, which is a Dutch city consisted of fortress, hospitals and churches in 17 century, is located in the Hoping Island in Keelung, Taiwan. The fortress and its affiliated structures were abandoned and left collapsing since the mid-17th century. Some relics of the fortress were still remained until the early 20th century but the fast development in the island has demolished or buried these relics under building or road pavements. Recently the government initiated a new excavation project at the parking lot where the ancient convent of church the Todos los Santos is believed there. Meanwhile we have used GPR with different antennas to help guiding the excavation location. After combining common offset data and velocity analysis we have located the possible remains of walls of the convent or other structures around 0.8 meters and 0.9 to 1.3 meters in depth, our results can provide useful information to better plan the archaeological excavations.

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