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Dissertations / Theses on the topic 'Deep corals'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Adkins, Jess F. (Jess Firey). "Deep-sea corals : a new oceanic archive." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/44503.

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Williams, Lindsey C. "The U.S. Atlantic commercial fishing industry and cold water coral conservation history, current trends and next steps /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 115 p, 2009. http://proquest.umi.com/pqdweb?did=1824796041&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Waller, Rhian G. "The reproductive ecology of deep-water scleractinian corals." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402225.

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Smith, Jodie. "The use of deep-sea corals as paleoceanographic monitors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0004/NQ42765.pdf.

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Smith, Jodie Ellen. "The use of deep-sea corals as paleoceanographic monitors /." *McMaster only, 1997.

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6

MOCCIA, DAVIDE. "Deep coral communities along Sardinian submarine canyons." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266681.

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Submarine canyons deeply incise the Mediterranean continental margins, becoming authentic conduits between the continental shelves and deep-sea basins. Enhanced habitat heterogeneity and organic inputs allow a noticeable benthic biodiversity development, creating authentic “hotspots” of biodiversity. However, if knowledge on distribution and composition of benthic assemblages dwelling in different canyon systems across the Mediterranean basin is considerably increasing; on the other hand, factors driving their distribution and biodiversity at multiple spatial scales are still difficult

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Struve, Torben. "Deciphering glacial-interglacial Southern Ocean dynamics with deep-sea corals." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/57119.

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Recent observations and past reconstructions have highlighted the significance of the Southern Ocean for modern and past ocean circulation patterns. Deep wind-induced upwelling renders the Southern Ocean unique, such that deep waters are brought directly to the surface where they can exchange with the atmosphere. Moreover, the Antarctic Circumpolar Current (ACC) is the dominant feature of Southern Ocean circulation linking all ocean basins and facilitating the inter-basin exchange of ocean properties. Hence, Southern Ocean dynamics act to (partly) moderate both, zonal and meridional transports

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Saucier, Esprit Heestand. "Phylogenetic Studies of the Deep-Sea Bamboo Corals (Octocorallia| Isididae| Keratoisidinae)." Thesis, University of Louisiana at Lafayette, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10163340.

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<p> Bamboo corals are a family (Isididae Lamouroux, 1812) of cnidarian anthozoans in the subclass Octocorallia. They are distinct and easily recognizable because of their unique articulating skeleton, which alternates internodes of calcium carbonate with proteinaceous sclerite (microscopic skeletal elements)-free nodes, and which is currently the primary synapomorphy for the family. Isididae is further divided into four subfamilies (Circinisidinae, Isidinae, Keratoisidinae, Mopseinae) based on several characters, including sclerite shape, size, and placement, and skeleton morphology. The deep-

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Gomez, Carlos E. "Ecological and physiological constraints of deep-sea corals in a changing environment." Diss., Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/535228.

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Biology<br>Ph.D.<br>Deep-water or cold-water corals are abundant and highly diverse, greatly increase habitat heterogeneity and species richness, thereby forming one of the most significant ecosystems in the deep sea. Despite this remote location, they are not removed from the different anthropogenic disturbances that commonly impact their shallow-water counterparts. The global decrease in seawater pH due to increases in atmospheric CO2 are changing the chemical properties of the seawater, decreasing the concentration of carbonate ions that are important elements for different physiological an

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Farfan, Gabriela A. (Gabriela Aylin). "The mineralogy and chemistry of modern shallow-water and deep-sea corals." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122323.

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Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>The architecture of coral reef ecosystems is composed of coral skeletons built from the mineral aragonite (CaCO3). Coral reefs are currently being threatened by ocean acidification (OA), which may lower calcification rates, reduce skeletal density, and increase aragonite dissolutio

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Georgian, Sam Ellis. "ENVIRONMENTAL AND ENERGETIC CONSTRAINTS ON COLD-WATER CORALS." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/382890.

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Biology<br>Ph.D.<br>Cold-water corals act as critical foundation species in the deep sea by creating extensive three-dimensional habitat structures that support biodiversity hotspots. There is currently a paucity of data concerning the environmental requirements and physiology of cold-water corals, severely limiting our ability to predict how resilient they will be to future environmental change. Cold-water corals are expected to be particularly vulnerable to the effects of ocean acidification, the reduction in seawater pH and associated changes to the carbonate system caused by anthropogenic

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12

Lawler, Stephanie Nichole. "Characterization of Bacterial Diversity in Cold-Water Anthothelidae Corals." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6295.

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Cold-water corals, similar to tropical corals, contain a diverse and complex microbial landscape. Comprised of vital microscopic organisms (i.e. bacteria, viruses, archaea), the coral microbiome is a driving factor in the proliferation and survival of the coral host. Bacteria provide essential biological functions within coral holobionts, facilitating increased nutrient utilization and production of antimicrobial compounds. To date, few cold-water octocoral species have been analyzed to explore the diversity and abundance of their microbial associates. For this study, 23 samples of the family

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13

DeLeo, Danielle Marie. "Characterizing the Effects of Anthropogenic Disturbance on Deep-sea Corals of the Gulf of Mexico." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/407865.

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Biology<br>Ph.D.<br>Cold-water corals are an important component of deep-sea ecosystems as they establish structurally complex habitats that support benthic biodiversity. These communities face imminent threats from increasing anthropogenic influences in the deep sea. Following the 2010 Deepwater Horizon blowout, several spill-impacted coral communities were discovered in the deep Gulf of Mexico, and subsequent mesophotic regions, although the exact source and extent of this impact is still under investigation, as is the recovery potential of these organisms. At a minimum, impacted octocorals

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Komugabe, Aimee Felicity. "Mid-to late-holocene environmental changes in the Southwest Pacific : records from deep-sea Black Corals." Phd thesis, Canberra, ACT : The Australian National University, 2015. http://hdl.handle.net/1885/150697.

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Henry, Lara. "Metabolism in corals from Antarctica, the deep-sea, and the shallow subtropics: contrasts in temperature, depth, and light." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4903.

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Coral habitats span the range from tropical to polar, extremely shallow to thousands of meters deep. The differences in light and temperature experienced in these varied habitats likely affect the metabolic rates of the corals residing there. The metabolism of three coral species from different habitats have been examined to elucidate the effects of these environmental parameters on metabolism, an under-studied aspect of coral biology. For all three species, measurements of oxygen uptake, ammonium excretion, and activity of the enzymes lactate dehydrogenase (LDH), malate dehydrogenase (MDH)

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Rosenberg, Angela D. "Insight from the Depths of the Straits of Florida: Assessing the Utility of Atlantic Deep-water Coral Geochemical Proxy Techniques." Scholarly Repository, 2011. http://scholarlyrepository.miami.edu/oa_theses/244.

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This thesis addresses the utility of deep-water coral geochemistry and its potential to reconstruct oceanographic conditions in the Straits of Florida. Through stable isotope and elemental analyses of the carbonate skeletons and use of available geochemical proxy calibration equations, present and past environmental parameters were determined. Over the last several years, scientific expeditions to the bottom of the Straits of Florida have revealed hundreds of deep-water coral mounds and led to the collection of extensive oceanographic data, sediment samples, and deep-water coral specimens. I

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CAU, ALESSANDRO. "Deep coral forests from the Island of Sardinia." Doctoral thesis, Università degli Studi di Cagliari, 2015. http://hdl.handle.net/11584/266561.

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Forests are major ecological structures of the terrestrial environment that enhance biodiversity through different kinds of specialized relations that exist between the vegetal canopy and organisms from all animal reigns. The concept of forest has recently been transplanted in the marine environment; marine forests share all ecological features of terrestrial forests. What is actually peculiar in the marine environment is the shift from the ‘vegetal’ forest in shallow depths (within the photic zone) to the ‘animal’ forest (dwelling in the circalittoral zone) throughout the depth gradient. ‘Ani

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Casais, Joana Filipa Monteiro. "Macrofaunal biodiversity of bathyal habitats at the moroccan carbonate province (Gulf of Cadiz, NE atlantic)." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/15328.

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Mestrado em Biologia Marinha<br>The Gulf of Cadiz is an extensive seepage area between the south Iberian and north Moroccan margins, west of the Strait of Gibraltar (NE Atlantic). It encompasses numerous carbonate mounds characterised by accumulations of mostly fossil deepwater corals, isolated coral patches and coral rubble, and over 40 submarine mud volcanoes at depths ranging 200 to 4,000m. This tectonically active area has a long geologic history and a central biogeographic location. The complex circulation of water masses ensures oceanographic connectivity with the Mediterranean Sea, Equa

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Brooke, Sandra Dawn. "Reproductive ecology of a deep-water scleractinian coral, Oculina Vericosa from the South East Florida shelf." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249955.

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Galkiewicz, Julia Parker. "Microbial Ecology and Functional Genomics of Deep-Water Coral-Associated Microbes." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3111.

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Lophelia pertusa is a cosmopolitan cold-water coral, often found in aphotic waters (>200m). Aggregations of L. pertusa (reefs) provide important habitat to many invertebrate and fish species and act as biodiversity hotspots in the deep sea. The health and diversity of these reefs is of vital importance to deep-sea ecosystems, and the microbial consortia associated with L. pertusa form the most basic ecological level. Deciphering the diversity and function of these microbes provides insight into the roles they play in maintaining reef health. This dissertation takes microbiological techniques

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21

Le, Goff-Vitry Marie-CeÌcile. "Molecular ecology of the deep-sea coral Lophelia pertusa in the North East Atlantic." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398819.

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22

Douarin, Melanie Amelie Laetitia. "Secrets from a deep reef : structure, biogeography and palaeoclimate reconstruction from Mingulay Reef complex sediment cores." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/11728.

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A multi-disciplinary study of sediment core records from the Mingulay Reef Complex, a cold-water coral reefs system off western Scotland, highlights the potential of cold-water corals from which detailed centennial-scale palaeo-environmental reconstructions can be derived. This study provides a new insight on the mechanisms controlling Lophelia pertusa reef build-up, shifts in biodiversity, the physical/chemical/biological processes and the sedimentary regime. A detailed record of Mingulay Complex growth history shows unprecedented high average accumulation rates of 3 – 4 mm a-1. Marine radioc

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23

Barbaro, Simone. "Analisi di tecniche di preprocessing per la classificazione di coralli con deep learing." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18481/.

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Si vuole comprendere quanto le operazione di estrazione di feature basate su colore e tessitura possano essere utili nella classificazione dei coralli. Quindi vengono esplorati gli effetti che le operazioni di preprocessing di cambiamento dello spazio di colore in HSV e CIELAB, local binary pattern, Wavelet e tiling abbiano sui modelli ResNet e DenseNet addestrati nei dataset EILAT e RSMAS. I risultati vengono riportati e confrontati attraverso diverse misure, alcune conclusioni vengono tratte da questi risultati e si espande su possibili ricerche future.

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Burke, Andrea Ph D. Massachusetts Institute of Technology. "Constraining circulation changes through the last deglaciation with deep-sea coral radiocarbon and sedimentary ²³¹Pa/²³⁰Th." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70777.

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Thesis (Ph. D.)--Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Radioactive isotopes can be used in paleoceanography both for dating samples and as tracers of ocean processes. Here I use radiocarbon and uranium series isotopes to investigate the ocean's role in climate change over the last deglaciation. I present a new method for rapid radiocarbon

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Noren, Hunter KG. "Can Twilight Reefs Usher In A New Dawn For Depauperate Shallow Coral Reefs?" Thesis, NSUWorks, 2016. https://nsuworks.nova.edu/occ_stuetd/421.

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As shallow reefs continue to decline, scientists are searching for the key to their persistence; as it turns out, they may just need to look deeper. Below many shallow tropical reefs, there exist healthy and more stable mesophotic coral reef communities. The ability of these reefs to act as a refuge for declining shallow populations has garnered significant interest among the scientific community; however, the reproductive and larval aspects necessary for this to occur are unknown. This study assesses the ability of deep reefs to act as a reproductive refuge for shallow counterparts by examini

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Gao, Lin [Verfasser], Wolfram [Akademischer Betreuer] Elsner, Wolfram [Gutachter] Elsner, and Christian [Gutachter] Cordes. "Trust and Development : The Deep Structure of Institutions-Building and Socio-Economic Performance / Lin Gao ; Gutachter: Wolfram Elsner, Christian Cordes ; Betreuer: Wolfram Elsner." Bremen : Staats- und Universitätsbibliothek Bremen, 2019. http://d-nb.info/1205878394/34.

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Folkersen, Maja. "Ecosystem Valuation of Vulnerable Marine Ecosystems in the South Pacific Islands." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/385544.

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One of the greatest challenges for sustaining the ecosystem services that we, as a society, derive from marine ecosystems is to minimize the knowledge gap relating to marine ecosystem values. That is, identifying, eliciting and understanding the economic value of the ecosystem services that marine systems provide for societies world-wide is key to ensuring sustainable resource use and environmental management of these ecosystems. This is particularly problematic for the ecosystem services derived from the deep sea as a tremendous knowledge gap exists for the many marine ecosystems that compris

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Villon, Sébastien. "Estimation automatisée sur vidéos de la biodiversité et de l’abondance des poissons coralliens." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG058.

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Les récifs coralliens soutiennent une forte biodiversité en poissons (environ 7000 espèces) qui est la source de plusieurs services écosystémiques comme l’apport en protéines via la pêche, la régulation des flux de matière mais aussi le support d’activités récréatives comme la plongée. Cependant, ces poissons subissent des pressions croissantes comme la surexploitation par la pêche et la destruction du corail par réchauffement climatique. Dans ce contexte, un des enjeux majeurs de l’écologie marine est d’estimer précisément la biodiversité, l’abondance et la biomasse de ces poissons récifaux e

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Lavelle, Katherine. "Epifaunal Assemblages on Deep-water Corals in Roatan, Honduras." Thesis, 2012. http://hdl.handle.net/1969.1/148466.

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Deep-water corals provide complex habitat structure for diverse assemblages of invertebrates and fishes. Similar to shallow coral reefs, oyster reefs, and seagrass beds, these complex biogenic structures serve many ecosystem functions: (a) as prey items; (b) sites for reproduction; (c) feeding stations, elevating suspension feeders above the benthos; and (d) refuges from predation. Because deep-sea corals provide some of the only three-dimensional habitats in the deep-sea, they may host distinct assemblages of epifauna. Non-destructive video surveys of deep-water coral assemblages were made to

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Tu, Tzu-Hsuan, and 塗子萱. "Systematics and phylogeny of deep-sea precious corals (Anthozoa: Octocorallia: Coralliidae)." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/35768738753339806323.

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博士<br>國立臺灣大學<br>海洋研究所<br>102<br>Members of Coralliidae, known as precious corals, have been widely utilized as jewelry and other valuable artifacts. The species of Coralliidae are widely distributed in most oceans from tropical to subpolar seas ranging from 100 m to 2000 m, but only those in Mediterranean Sea and northwestern Pacific have been commercially harvested. Species of Coralliidae are vulnerable to fishing pressure due to their long life span, slow growth rates, and relatively late reproductive maturation. There is an urgent need to evaluate the status of precious corals and an accura

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Chen, Sang. "Understanding Geochemical Tracers in Deep-Sea Corals from a Biomineralization Perspective." Thesis, 2019. https://thesis.library.caltech.edu/11715/8/SangChenThesisFinal.pdf.

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<p>Deep-sea corals have been developed as a useful archive of the chemistry and circulation of intermediate and deep waters in past oceans over the last three decades. However, applications of traditional paleoceanographic tracers in deep-sea corals remain a challenge due to our incomplete understanding of the biomineralization mechanisms underlying the incorporation of these tracers and their variabilities in the coral skeletons (a.k.a. the "vital effects"). In this thesis, an effort was made to understand the vital effects associated with the stable isotope as well as minor and trace element

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Yum, Lauren. "Revealing Holobiont Structure and Function of Three Red Sea Deep-Sea Corals." Diss., 2014. http://hdl.handle.net/10754/336497.

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Deep-sea corals have long been regarded as cold-water coral; however a reevaluation of their habitat limitations has been suggested after the discovery of deep-sea coral in the Red Sea where temperatures exceed 20˚C. To gain further insight into the biology of deep-sea corals at these temperatures, the work in this PhD employed a holotranscriptomic approach, looking at coral animal host and bacterial symbiont gene expression in Dendrophyllia sp., Eguchipsammia fistula, and Rhizotrochus sp. sampled from the deep Red Sea. Bacterial community composition was analyzed via amplicon-based 16S survey

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Gagnon, Alexander C. "Geochemical Mechanisms of Biomineralization from Analysis of Deep-Sea and Laboratory Cultured Corals." Thesis, 2010. https://thesis.library.caltech.edu/5790/2/Gagnon_thesis_09_CIT_revised.pdf.

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<p>The ocean is a major component of global heat transport and represents a large exchangeable reservoir of CO₂. The importance of these effects on climate can be quantified with records of ocean temperature, chemistry and dynamics spanning past climate change. One approach to reconstruct past ocean conditions relies on the chemical composition of CaCO₃ skeletons from coral. Despite the utility of these geochemical proxies, several lines of evidence suggest that biomineralization, the process corals use to build their skeletons, also influences composition, complicating the interpretation o

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Hornung, Jonathan P. "Exploring the potential for using deep-sea bamboo corals (Isidella sp.) for paleoceanographic reconstructions." Thesis, 2011. http://hdl.handle.net/1957/27661.

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Deep-sea bamboo coral (Isidella sp.) SE000901A from the southern Oregon coast (water depth 1048m) provides a high-resolution record of variability of North Pacific Intermediate Water (NPIW) and carbon rain to the sea floor, related to coastal upwelling, from 1808 to 2000AD. Counting of annual layers in magnesium to calcium (Mg/Ca) variations, measured by electron microprobe analysis, yields a detailed age model that is transferred directly to records of carbon and oxygen isotope ratios (δ¹³C and δ¹⁸O) measured by isotope ratio mass spectrometry and trace element ratios measured by laser ablati

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Kitahara, Visentini Marcelo. "Morphological and molecular systematics of scleractinian corals (Cnidaria, Anthozoa), with emphasis on deep-water species." Thesis, 2011. https://researchonline.jcu.edu.au/39370/1/39370-kitahara-2011-volume-1.pdf.

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Ubiquitous to all oceans, the phylum Cnidaria is the second most basal metazoan group in the tree of life, with plausible fossil record dating back from the pre-Cambrian. The vast majority of cnidarians are restricted to the marine realm, although few species are known to occur in fresh water systems. The approximately 9000 extant representatives of this phylum are divided into 2 sub-phyla, of which the Anthozoa embraces nearly 7000 species including approximately 1400 extant scleractinians, also commonly known as corals. Corals are the subject of intense scientific, public and media interest

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Bax, N. "Deep-sea stylasterid corals in the Antarctic, sub-Antarctic and Patagonian Benthos : biogeography, phylogenetics, connectivity and conservation." Thesis, 2014. https://eprints.utas.edu.au/22768/2/whole_Bax_thesis_ex_pub_mat.pdf.

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Large aggregations of sylasterid corals have been identified throughout the offshore waters of the Antarctic, Sub-Antarctic and South America. These biodiverse regions are interspersed by deep trenches, channels, sedimentary plains and isolated rocky habitat, which may facilitate or inhibit dispersal over evolutionary and ecological time scales. Deep-sea sampling has increased exponentially, across these benthic habitats, due to collaborative projects such as the Census of Antarctic Marine Life (CAML). Consequently, it is now possible to attempt to combine genetic and taxonomic expertise

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Pinho, Raquel Nunes de. "Genetic structure and population connectivity of the deepsea file clam Acesta from submarine canyons in the North Atlantic." Master's thesis, 2019. http://hdl.handle.net/10773/28317.

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Advances in the exploration of the deep sea changed our view of an environment calm, dark and barren of life, to an environment where life presents adaptations to endure the extreme environmental conditions and prosper in habitats often hosting high biodiversity such as cold-water coral reefs (CWC). The calcium carbonate structure segregated by cold-water corals provides a 3D framework that offers shelter and resources for many species to establish, either permanently or temporarily. Increasing anthropogenic pressures related to the exploration of biological and mineral resources, especially

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Soares, Ana Sofia Carvalho. "Local ecological knowledge of vulnerable marine ecosystems of the Portuguese mainland continental shelf and upper slope." Master's thesis, 2021. http://hdl.handle.net/10773/33509.

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Sponges and corals form highly structured and vulnerable marine ecosystems (VMEs) that serve as refuge areas and feeding grounds for many marine species. Knowledge on the distribution of these VMEs is critical to ensure their sustainable management and conservation but is largely lacking in some areas. This study aimed to co-develop a knowledge baseline on the diversity and distribution of VME-indicator species (VMEIs) by assembling Local Ecological Knowledge (LEK) of professional fishers operating bottom-contacting gears in mainland North and Central Portugal. In total, 70 fishermen of

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Eltgroth, Selene Farrell. "Unraveling deep-ocean connections to climate with deep-sea coral records of radiocarbon and Cd/Ca." Thesis, 2006. https://thesis.library.caltech.edu/2104/2/01Chapter1.pdf.

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We generated records of radiocarbon and trace metals in deep-sea corals to investigate the role of the deep ocean during episodes of rapid environmental change. Our record of radiocarbon ages measured in a modern deep-sea coral from the northeastern Atlantic shows the transfer of bomb radiocarbon from the atmosphere to the deep ocean. We detect bomb radiocarbon at the coral growth site starting in 1975–1979. Our record documents a Delta14C increase from –80 ± 1‰ (average 1930–1979) to a plateau at –39 ± 2‰ (average 1994–2001). From a suite of fossil deep-sea corals, variability in North Atlant

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Mughal, Mehreen. "Eguchipsammia fistula Microsatellite Development and Population Analysis." Thesis, 2012. http://hdl.handle.net/10754/262733.

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Deep water corals are an understudied yet biologically important and fragile ecosystem under threat from recent increasing temperatures and high carbon dioxide emissions. Using 454 sequencing, we develop 14 new microsatellite markers for the deep water coral Eguchipsammia fistula, collected from the Red Sea but found in deep water coral ecosystems globally. We tested these microsatellite primers on 26 samples of this coral collected from a single population. Results show that these corals are highly clonal within this population stemming from a high level of asexual reproduction. Mitochondrial

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Beazley, Lindsay. "Reproductive Biology of the Deep-Water Gorgonian Coral Acanella arbuscula from the Northwest Atlantic." 2011. http://hdl.handle.net/10222/13265.

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This thesis examined the reproductive biology of the poorly-known deep-water gorgonian Acanella arbuscula from the Northwest Atlantic. Colonies were collected from The Gully in 2007 and 2010 between 914 and 1860 m depth, and the Flemish Cap in 2009 between 671 and 1264 m. Mean polyp fecundity was relatively high for both females and males, and the large oocyte size suggests that A. arbuscula produces lecithotrophic larvae. This species may have overlapping periodic or seasonal cycles of gametogenesis, and the absence of planulae suggests that A. arbuscula is a broadcast spawner. No spatial var

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Strzepek, Kelly Michelle. "Deep-sea coral amino acid archives of marine ecosystem function in east and southeast Australian waters." Phd thesis, 2015. http://hdl.handle.net/1885/150690.

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The research presented here uses deep-sea bamboo corals (Family Isididae) to reconstruct ecosystem dynamics in southeast Australian waters over the past 50-100 years. The work is divided into two complimentary research themes: methodological considerations and case studies that apply amino acid compound specific isotope analysis (AA-CSIA) to specimens from three regions: the subtropical Lord Howe Rise, and temperate to subantarctic Tasmanian waters. These case studies test the central thesis that Australian marine ecosystems are sensitive to documented oceanographic change. First, improvemen

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Hines, Sophia Katharine Vizza. "Glacial Ocean Dynamics: Insight from Deep-Sea Coral Reconstructions and A Time-Dependent Dynamical Box Model." Thesis, 2018. https://thesis.library.caltech.edu/10539/7/glacial-ocean-dynamics_Revised10252017.pdf.

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<p>Glacial-interglacial cycles, occurring at a period of approximately 100,000 years, have dominated Earth's climate over the past 800,000 years. These cycles involve major changes in land ice, global sea level, ocean circulation, and the carbon cycle. While it is generally agreed that the ultimate driver of global climate is changes in insolation, glacial cycles do not look like insolation forcing. Notably, there is a highly non-linear warming response at 100,000 years to a relatively small forcing, implicating a more complicated system of biogeochemical and physical drivers. The ocean plays

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Muller, Anne. "Deep-sea sediment core and coral reconstructions of the Late Quaternary paleoceanography of the eastern Indian Ocean." Phd thesis, 2002. http://hdl.handle.net/1885/151776.

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Lu, Wen-Yao, and 呂文堯. "A Study of Shear Strength of Reinforced Concrete Corbels and Deep Beams with Web Openings." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/37902493380333981048.

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博士<br>國立臺灣科技大學<br>營建工程系<br>98<br>In this study, 39 reinforced concrete corbels with shear span-to-depth ratio greater than unity were tested. Test results indicate that the lower the shear span-to-depth ratio the higher the shear strength of corbels is. The higher the compressive strength of concrete the higher the shear strength of corbels is. The higher the vertical stirrup parameter the higher the shear strength of corbels is. An analytical model for determining the shear strength of reinforced concrete corbels is also proposed in this study. The shear strengths predicted by the proposed me

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Du, Preez Cherisse. "Resolving relationships between deep-sea benthic diversity and multi-scale topographic heterogeneity." Thesis, 2014. http://hdl.handle.net/1828/5828.

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Resolving diversity patterns and their underlying drivers has application for both ecological theory and ocean management. Because seafloor characteristics are often used to assess bottom habitat, I examined the relationship between deep-sea benthic (bottom-living) diversity and multi-scale topographic heterogeneity. Most work occurred on the Canadian Pacific continental shelf at Learmonth Bank with additional sites in Strait of Georgia (BC) and Gulf of Maine (Atlantic shelf). High-resolution species distribution and seafloor data were annotated from remotely operated vehicle benthic imagery s

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Gonçalves, Guilherme Sampaio Rodrigues. "Fishing Impact on Deep-Sea Cold-Water Coral Communities of the Azores: Contribution to Descriptor 6 of the Marine Strategy Framework Directive." Master's thesis, 2021. https://hdl.handle.net/10216/137457.

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Brookshire, Brian. "A Multidisciplinary Investigation of the Intermediate Depths of the Atlantic Ocean: AAIW delta^13C Variability During the Younger Dryas and Lithoherms in the Straits of Florida." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-12-8675.

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A transect of cores ranging from 798 m to 1585 m water depth in the South Atlantic Ocean document the relative intermediate water mass nutrient geometry and stable isotopic variability of AAIW during the Younger Dryas cooling event. The data reveal concurrent delta^13 C and delta^18 O excursions of 0.59 ppt and 0.37 ppt within the core of Antarctic Intermediate Water (AAIW) centered at 11,381 calendar years before present based on radiometric age control. A portion of the delta^1 3C variability (0.22 ppt) can be explained by a shift in thermodynamic equilibrium concurrent with a drop in temper

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