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Dissertations / Theses on the topic 'Ostracoda'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Morais, Anderson Luiz Martins de. "Ostracodes (Crustacea, Ostracoda) das praias rochosas de Santa Catarina, Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/153380.

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Os ostracodes são microcrustáceos predominantemente bentônicos que deixaram rico registro fóssil, constituindo-se em importante ferramenta para a interpretação paleoambiental e bioestratigráfica. Estudos que tratam dos ostracodes recentes são de grande importância à Paleomicrontologia, pois muitos gêneros e até mesmo espécies do Cenozoico ainda são encontrados nos mares atuais. Diversos estudos versam sobre os Ostracoda na plataforma continental e talude superior no Brasil, mas são raras as pesquisas nas águas mais rasas do infralitoral. O principal objetivo deste estudo foi identificar e ilus

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2

Wood, Roland Neville. "Ecology of Lake District Ostracoda." Thesis, University of Greenwich, 1992. http://gala.gre.ac.uk/6348/.

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Freshwater ostracods are potentially useful for environmental monitoring and, since their calcified valves may be preserved in lake sediments, are also valuable in palaeolimnological studies of environmental pollution such as eutrophication and surface water acidification. To establish a data-base of ostracod ecology, biannual survey work in 1989-1990 was performed in 75 lakes and tarns of a wide range of physico-chemical characteristics in the Lake District in Cumbria, ranging from large eutrophic lakes such as Windermere and Ullswater to tiny, upland acidic tarns. pH ranged from 4.3 (Black P

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3

Reeves, Jessica Marie. "The use of ostracoda in the palaeoenvironmental reconstruction of the Gulf of Carpentaria, Australia, from the last interglacial to present." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050111.153534/index.html.

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4

Gaiger, Frances Jean. "Mid-Pleistocene Extinction of Deep-Sea Ostracoda?" Thesis, University of Canterbury. Geological Sciences, 2006. http://hdl.handle.net/10092/1349.

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A global extinction event has been documented in protozoan foraminifera in the late Pliocene to Pleistocene. The timing of the extinction event varied depending on location, however for Ocean Drilling Project Site 1125, disappearances occurred between 2.5 and 0.57 Ma, with the major decline approximately 1.1 Ma. In order to determine if this event affected benthic organisms other than protozoans, this study was undertaken to determine how podocopid ostracods (Crustacea) recovered Ocean Drilling Program Site 1125 responded. The present study was hindered by the small number of valves recovered

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5

Wood, Adrian Mark. "Recent Ostracoda and Mid-Pilocene global warming." Thesis, Aberystwyth University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496746.

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6

Ferdinando, Darren. "Ostracode and foraminiferal taxonomy and palaeoecology of the Fossil Cliff Member of the Holmwood Shale, northern Perth Basin, Western Australia." University of Western Australia. Dept. of Geology and Geophysics, 2001. http://theses.library.uwa.edu.au/adt-WU2003.0019.

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The Sakmarian (Cisuralian, Permian) Fossil Cliff Member of the Holmwood Shale is situated in the northern Perth Basin, Western Australia, and consists of alternating beds of shale and silty calcarenite forming three parasequences. Within this member a diverse fauna of ostracodes and foraminifera are present. During the Cisuralian the northern Perth Basin formed part of the Gondwanan supercontinent and was linked to Greater India via an epeiric sea that opened to the north. The ostracode fauna is restricted to the calcareous beds of the member and consists of a diverse benthic fauna comprising

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7

Sartori, Lisandra Aparecida Alves. "Variações faunísticas ((Ostracoda) no testemunho G-77, quaternário tardio da Bacia de Campos, Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/38630.

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Estudos recentes têm demonstrado significativas variações na composição da fauna de ostracodes batiais decorrentes de mudanças climáticas. Visando verificar como esses eventos afetaram a ostracofauna batial da bacia de Campos foram analisadas 15 amostras provenientes de um testemunho a pistão recuperado a 1.287 m de lâmina de água. Espécies alóctones e autóctones foram identificadas sendo apenas as últimas estudadas. A idade das amostras foi obtida com base na análise de isótopos estáveis de oxigênio em testas do foraminífero planctônico Globigerinoides ruber, e os resultados comparados com da

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8

Pollicott, Paul D. "The Silurian Ostracoda of the Oslo region, Norway." Thesis, University of Leicester, 1987. http://hdl.handle.net/2381/34940.

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A study of the ostracode fauna from the Silurian of Norway has been undertaken. All of the taxa recoverd and described are from the Llandovery and Wenlock Series; one species from the topmost part of the Ordovician of the Oslo region is also figured. Research has concentrated particularly upon the Palaeocopa Henningsmoen, 1954, but also includes the Leperditicopida Scott, 1961. The 'non-palaeocopes', because of particular problems related to preservation and taxonomy, are not treated as extensively. Primary revision has been made wherever possible. Such work has been augmented by studies of ex

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9

Larwood, Jonathan G. "Tertiary to recent evolution of Ostracoda on seamounts." Thesis, Cardiff Metropolitan University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400645.

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10

Syme, Anna. "A systematic revision of the cylindroleberididae (Crustacea Ostracoda Mydodocopa) /." Connect to thesis, 2007. http://eprints.unimelb.edu.au/archive/00002921.

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11

Gammudi, Amar Mohamed. "Lower Palaeogene ostracoda from the Sirt Basin of Libya." Thesis, University of Glasgow, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299742.

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12

Galoukas, Stylianos Filippos. "Late Cenozoic ostracoda of Cyprus and their palaeoenvironmental interpretation." Thesis, University College London (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283679.

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13

Slipper, Ian Jeffrey. "Turonian (Late Cretaceous) Ostracoda from Dover, south-east England." Thesis, University of Greenwich, 1997. http://gala.gre.ac.uk/6302/.

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Ostracod assemblages from samples collected through the Turonian Stage of the Late Cretaceous from Dover, Kent, south-east England, consist of one hundred and three species group taxa. These are described and illustrated. This represents a significant increase in the knowledge of the Turonian fauna, since previous estimates of the number of species present during the Turonian are less than thirty. This improvement has been brought about by the selection of an appropriate processing method. Freeze-thaw processing is recommended for chalks and hardgrounds which comprise much of the Turonian Stag

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14

Smith, Robin James. "Biology and ontogeny of Cretaceous and Recent Cyprididae Ostracoda (Crustacea)." Thesis, University of Leicester, 1998. http://hdl.handle.net/2381/30470.

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Study of the biology and ontogeny of Cretaceous and Recent ostracods shows that the family Cyprididae exhibits conservative evolution over the last 100 million years. The Cretaceous cypridid ostracod Pattersoncypris micropapillosa Bate, 1972, with preserved appendages, is described and details of the limbs of its adults and juveniles are compared with Recent Cyprididae. A detailed study of the ontogeny of the Recent Cyprididae ostracod Eucypris virens Jurine, 1820) reveals that, with the exception of the last podomere on the antennules, the chaetotaxy (distribution pattern of setae) shows cont

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15

Williams, Mark. "Ostracoda (Arthropoda) of the middle Ordovician Simpson Group , Oklahoma, USA." Thesis, University of Leicester, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315262.

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16

Machado, Cláudia Pinto. "(Paleo)zoogeografia dos ostracodes holocênicos das regiões leste e nordeste da plataforma continental brasileira." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/132777.

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Os estudos com ostracodes recentes e sub-recentes da plataforma continental do Brasil têmse concentrado, até o momento, principalmente nas plataformas equatorial e sul/sudeste. A região leste/nordeste, localizada entre estas duas áreas, aqui considerada como a área entre o Cabo de São Roque (RN) e Cabo Frio (RJ), não foi devidamente estudada, apresentando diversas lacunas do ponto de vista taxonômico e zoogeográfico. Visando suprir esta carência, o presente trabalho tem por objetivo o estudo da taxonomia dos ostracodes das plataformas leste e nordeste do Brasil, buscando a integração destas in

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17

Pereira, Elise Vargas. "Taxonomia e ocorrência das espécies do gênero bromelícola Elpidium (Crustacea: Ostracoda) em áreas de mata atlântica no estado de Santa Catarina, Brasil." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-22102013-154642/.

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Trabalhos recentes realizados no Brasil apresentaram pelo menos 5 espécies do gênero Elpidium, ostrácode de fitotelmata de bromélia, embora o trabalho de revisão desse gênero propusesse apenas a espécie tipo, E. bromeliarum, com registros do Rio Grande do Sul ao Espírito Santo. No presente trabalho, foram descobertas novas espécies de Elpidium, em amostras coletadas em 2009, em um transecto sul-norte no estado de Santa Catarina, incluindo regiões próximas à localidade tipo de E. bromeliarum. Os animais foram coletados com pipeta e conservados em álcool 70%; as valvas, fotografadas ao microscóp

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18

El-Waer, Ahmed Ammar. "The Upper Cretaceous and Lower Tertiary Ostracoda from northwestern offshore Libya." Thesis, University of Hull, 1990. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420751.

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19

Dickson, Carol Paula. "Quaternary ostracoda from the Celtic and Irish seas : a palaeoenvironmental study." Thesis, Aberystwyth University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603582.

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20

De, Deckker P. "Australian Quaternary studies : a compilation of papers and documents submitted for the degree of Doctor of Science in the Faculty of Science, University of Adelaide /." Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09SD/09sdd299.pdf.

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21

Conway-Physick, Jessica Ann. "The holocene ostracods of the Agulhas Bank, South Africa : their classification, distribution and ecology." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/17467.

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Bibliography: pages 69-77.<br>An analysis of the Holocene ostracod fauna of the Agulhas Bank has been carried out on seventy-three surficial sediment samples. Sixty-six species of Ostracoda have been recorded, of which fifty-nine species are accounted for in forty genera and the remaining seven species are of indeterminate classification. The species are described and their distribution and ecology is given. An. analysis of the sedimentology, as well as an oceanographic analysis of the bottom water on the Agulhas Bank, has provided environmental parameters for each sediment sample location, en

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22

Boomer, Ian Desmond. "The taxonomy and temporal distribution of Lower Jurassic Ostracoda from North West Europe." Thesis, University College London (University of London), 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582009.

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23

Wakefield, Matthew Ian. "Ostracoda (Crustacea) of the Great Estuarine Group (Bathonian, Middle Jurassic), Inner Hebrides, Scotland." Thesis, University of Leicester, 1991. http://hdl.handle.net/2381/34977.

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The Ostracoda of the Great Estuarine Group, Inner Hebrides, Scotland are monographed. These are referred to Order Podocopida, Suborder Podocopina, superfamilies Cytheracea, Cypridacea and Darwinulacea, seven families, five subfamilies, 17 genera (three new) and 41 species (25 new, 11 in open nomenclature). The stratigraphic occurrence of the ostracod species is determined for the Islands of Skye, Eigg and Muck. The major lithostratigraphic subdivisions of the Great Estuarine Group are reflected in the ostracod fauna. The ostracod species are largely endemic to the Hebrides; there are generic l

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24

Park, Lisa Ellyn. "Assessing diversification patterns in an ancient tropical lake: Gomphocythere (Ostracoda) in Lake Tanganyika." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187316.

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I examined the distribution of 70 morphological characters for 17 extant species of an ostracod genus, Gomphocythere, in Africa, to test hypotheses concerning character development and speciation patterns. Using heuristic searches conducted with the phylogenetic reconstruction program PAUP, I found 9 trees of 269 steps (CI = 0.45). The skewness of tree length distribution reveals significant phylogenetic structure in the data. Nodes are supported by 2 to 13 character state changes, and these character changes are sometimes reversed or paralleled elsewhere, accounting for much of the homoplasy

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25

Frewin, J. "Palaeogene ostracods from the South African continental shelf." Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/17003.

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Bibliography: pages 147-155.<br>92 cytheracean species, representing 44 genera are recorded from the Palaeogene Agulhas Bank and west coast margin of South Africa. 11 genera and 3 species are common with the Upper Cretaceous faunas. 12 genera (18 species) are left in open nomenclature. The following genera are represented:- Bythoceratina, Incongruellina, Ruggieria, Eucythere, Krithe, Parakrithe, Eucytherura, Cytheropteron, Ambostracon, Urocythereis, Muellerina, Leguminocythereis, Loxoconcha, Schlerochilus, Poseidonamicus, Bradleya, Agrenocythere, Australileberis, Chrysocythere, Costa, Echinocy

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26

Sepúlveda, Priscila dos Santos. "Uso da espectroscopia no infravermelho com transformada de Fourier na avaliação de efeitos ecotoxicológicos subletais sobre Ostracodes Chlamydoteca sp." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-29112018-103811/.

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Com o crescimento populacional e aumento das atividades humanas, grandes quantidades de poluentes são despejadas diariamente no meio ambiente. Nos ecosssistemas aquáticos, organismos são expostos por longos períodos à baixas concentrações de contaminantes. Assim estudos que focam em novas metodologias que sejam rápidas e não invasivas, são necessários para a avaliação de efeitos subletais. Um exemplo é a espectroscopia no infravermelho com transformada de Fourier (FTIR). Esta técnica é capaz de detectar alterações macromoleculares em amostras biológicas de forma rápida e não destrutiva, sendo

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27

Abke, Rodney Alan. "A fossil assemblage of ostracoda, foraminifera, and gastropoda of the West Texas salt flats." Virtual Press, 1994. http://liblink.bsu.edu/uhtbin/catkey/897497.

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The salt flats of west Texas are large ephemeral lakes, Pleistocene to Holocene in age. The evaporite material in these lakes represents the sedimentary history of the lake and the surrounding area. Recently, a fossil assemblage was found in the sediments of this deposit. This assemblage includes four species of ostracoda (Limnocvthere staplini, Candona rawsoni, Candona thomasi, and Cvprideis salbrosa), two species of gastropoda, (Amnicola decepta, and Amnicola pilsbrvi), and discovery is significant because this assemblage has not been previously reported, and it provides an opportunity to re

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28

Zazzali, Sindbad. "Paléobiodiversité des ostracodes à la limite Permien moyen - Permien supérieur." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066111/document.

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Les ostracodes, microcrustacés (Arthropoda), sont relativement abondants dans les archives paléontologiques. Sensibles aux variations paléoenvironnementales, la composition des assemblages et leur diversité sont d’excellents marqueurs des changements qui affectent le benthos marin néritique. Leur diversité est connue pour être fortement affectée par la crise biologique marquant la limite Permien-Trias, mais leur histoire à la fin du Permien moyen reste peu documentée.Près de 10 Ma avant la limite Permien-Trias, à la fin du Permien moyen, un important épisode d’extinction intervient, préfiguran

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29

Al-Bashir, Jenan Mohammad T. "Cretaceous ostracoda of the super family Cytheracea from Iraq, their biostratigraphy and correlation with adjacent regions." Thesis, University of Glasgow, 1986. http://theses.gla.ac.uk/1462/.

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The cretaceous ostracods of Iraq are poorly known, so the aim of the project was to study their taxonomy and to discover their value in correlation between wells in Iraq and between Iraq and neighbouring countries. The Cenomanian-Santonian ostracods of the superfamily Cytheracea were studied in detail from five wells in central and southern Iraq (East Baghdad Well-3, South Rumaila Well-104, Safawi Well-1, Ghalaisan Well-1, and Kifl Well-2). 5 families, 6 subfamilies, 28 genera, 4 subgenera and 74 species were discovered. Two new genera, Iraqicythereis and Archeocosta (the latter published by A

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30

Miller, Christopher Giles. "Micropalaeontology (Conodonta, Ostracoda) across the Ludlow/Pridoli series boundary (Silurian) of Wales and the Welsh Borderland." Thesis, University of Leicester, 1993. http://hdl.handle.net/2381/35070.

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The ostracod and conodont micropalaeontology of the Silurian Ludlow/Pridoli series boundary is documented from 88 localities across Wales and the Welsh Borderland. Fourteen multielement conodont species (two in open nomenclature), eight unassigned Ozarkodina elements and ten ostracod species (four in open nomenclature) are described from the Upper Whitcliffe and Downton Castle Sandstone formations and their lateral equivalents in Wales and the Welsh Borderland. A septimembrate prionodontid conodont apparatus Coryssognathus dubius (Rhodes, 1953) is reconstructed from discrete elements. Original

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31

Ingalls, Brian R. "Biotic and taphonomic response to lake level fluctuations in the Greater Green River Basin (Eocene), Wyoming." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1153505477.

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32

Bottezini, Silvia Regina. "Ostracoda (Crustacea) holocênicos do Arquipélago de São Pedro e São Paulo: riqueza e aspectos ecológicos e zoogeográficos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/131936.

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O Arquipélago de São Pedro e São Paulo (ASPSP) localiza-se cerca de 1100 km do litoral do Rio Grande do Norte, e está constituído por quatro ilhas maiores dispostas em semicírculo formando uma enseada com profundidades que variam ente 3 a 18 m. Vários estudos sobre a fauna existente no ASPSP foram realizados, entretanto, este é apenas o segundo trabalho com foco na ostracofauna do arquipélago. No material analisado, coletado na enseada, foram reconhecidas 14 espécies, dez gêneros e oito famílias; dentre estes, foi descrito um gênero e espécie novos para a família Hemicytheridae e uma nova espé

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33

White, Tom Samuel. "Late middle Pleistocene molluscan and ostracod successions and their relevance to the British Paleolithic record." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648393.

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34

McFarland, Andrew J. "Using Ostracode Dynamics to Track Ecosystem Response to Climatically and Tectonically Induced Lake-Level Fluctuations in Fossil Basin, Green River Basin, Wyoming, USA." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1348242706.

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35

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.<br>"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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36

Pyne, Rebecca Sian. "The biostratigraphy, palaeoecology and taxonomy of Upper Cretaceous (Coniacian to Lower Maastrichtian) Ostracoda from the chalk of East Anglia." Thesis, Aberystwyth University, 2001. http://hdl.handle.net/2160/dee9218f-08c1-4d29-99ce-57a20d1343a1.

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The thesis is based on 205 sediment samples supplied by the British Geological Survey from the Trunch Borehole and various outcrop localities in Norfolk and Suffolk. At least 80,000 ostracod specimens were recovered, belonging to 151 species and 53 genera. These are fully illustrated and described in a large systematic taxonomy chapter. Seventeen species and I subspecies were described as new. A stepped pattern of origination and extinction occurs throughout the Upper Chalk of East Anglia and the Ostracoda thereby display high biostratigraphical potential. The large number of Lazarus taxa in t

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37

Miranda, Fabricia Sousa de. "Ocorrência de ostracoda no médio Rio Doce/MG e revisão do estado da arte do estudo desse grupo no Brasil." Universidade Federal de Minas Gerais, 2008. http://hdl.handle.net/1843/BIRC-8A8SNM.

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The more important caracteristics of Ostracoda were reviewed, as well a survey of several scientific researches about freshwater and semi-terrestrial ostracods. Beyond these selections of researches about Brazilian fauna, this paper offers to reader a check list making evidence of ostracods richness. The main idea was prepare a data basis which became promptness accessible the knowledge of relevant researches about Brazilian ostracods. It was found less searchers involved with recent ostracds than involved with fossil ostracods in Brazil. To finish, the kind of developed researches in another

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38

Sudomir, Judith C. "Effects of multiple time scale water level fluctuations on a Great Lakes Coastal Wetland Community." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1271704850.

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39

Zazzali, Sindbad. "Paléobiodiversité des ostracodes à la limite Permien moyen - Permien supérieur." Electronic Thesis or Diss., Paris 6, 2016. http://www.theses.fr/2016PA066111.

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Les ostracodes, microcrustacés (Arthropoda), sont relativement abondants dans les archives paléontologiques. Sensibles aux variations paléoenvironnementales, la composition des assemblages et leur diversité sont d’excellents marqueurs des changements qui affectent le benthos marin néritique. Leur diversité est connue pour être fortement affectée par la crise biologique marquant la limite Permien-Trias, mais leur histoire à la fin du Permien moyen reste peu documentée.Près de 10 Ma avant la limite Permien-Trias, à la fin du Permien moyen, un important épisode d’extinction intervient, préfiguran

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40

Koyama, Kristina. "Studies on development in Euphilomedes ostracods: Embryology, nervous system development, and the genetics of sexually dimorphic eye development." Scholarly Commons, 2017. https://scholarlycommons.pacific.edu/uop_etds/2978.

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Model organism studies have been fundamental in understanding evolutionary and developmental biology. However, non-model organisms present opportunities to study unique characteristics and as comparisons to model organisms, leading us toward broader and more relevant perspectives on diversity. The Euphilomedes genus of ostracods is an example of a non-model group with potential for evolutionary and developmental studies. Ostracoda is an ancient, basally branching lineage of Crustaceans with a complete and prodigious fossil record. Despite the group’s promise for evolutionary studies, much r

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41

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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42

Luz, Nathália Carvalho da. "O gênero xestoleberis sars, 1866 (crustacea-ostracoda) nas plataformas norte, nordeste e leste e no arquipélago de São Pedro e São Paulo, Brasil." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/114395.

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Os ostracodes constituem um importante grupo de microcrustáceos que tem despertado o interesse tanto das biociências quanto das geociências. Para tanto, é fundamental o estudo taxonômico destes organismos e o entendimento de sua distribuição e ecologia. Os trabalhos realizados na plataforma continental brasileira muito têm contribuído para o conhecimento do grupo, que é bastante diverso. Porém, a riqueza e complexidade dos ostracodes ressaltam a necessidade de mais estudos também na plataforma. Em ilhas oceânicas brasileiras, as pesquisas com ostracodes ainda é muito recente, com poucos trabal

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PASTORINO, PAOLO. "ALPINE LAKES, INDICATORS OF GLOBAL CHANGE: ECOLOGICAL CHARACTERIZATION AND ENVIRONMENTAL PRESSURES IN TWO LAKES FROM ITALIAN ALPS." Doctoral thesis, Università degli Studi di Trieste, 2020. http://hdl.handle.net/11368/2961321.

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Alpine lakes are among the most remote aquatic environments in Europe. Although remote, their small size and the high turnover of surface waters render alpine catchments extremely receptive and vulnerable to anthropogenic impact on a local (i.e., water abstraction, tourism, introduction of alien species) and a global scale (long-range transport of pollutants, acid rain, global warming). Alpine lakes are indicators of global environmental change and “early warning systems” for the mountain environment. Many studies have considered single lakes or groups of lakes; however, because of the wide e

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Bowles, Rachel E. "The Use of the Ostracode Cyprideis Americana (Sharpe) as a Proxy for Salinity in Bahamian Lake Systems." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1272.

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Ostracodes, bi-valved crustaceans, are potentially excellent proxies for salinity.They are abundant, react to changes in salinity, and secrete low-magnesium calcite shells that preserve information about their host water chemistry. Changes in valve trace element concentration, stable isotope composition, and sieve pore shape values have been linked to changes in salinity. This study analyzed the response of the euryhaline ostracode, Cyprideis americana, to salinity in six lakes from two Bahamian islands across two seasons. The purpose of this work was to determine which compositional and morph

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Utida, Giselle. "Fósseis em micritos quaternários da Serra da Bodoquena, Bonito-MS e sua aplicação em estudos paleoambientais." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-08062009-163642/.

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O município de Bonito e arredores em Mato Grosso do Sul apresentam atrações turísticas relacionadas a diversos tipos de depósitos carbonáticos quaternários, que formam cachoeiras, barragens naturais e tornam as águas de turbidez quase nula. A área está inserida no Parque Nacional da Serra da Bodoquena e na Reserva da Biosfera do Pantanal (UNESCO). As tufas calcárias são rochas porosas formadas pela precipitação do carbonato de cálcio em água doce e podem conter diversos tipos de fósseis. Apresentam-se sob a forma de cachoeiras, barragens e sedimentos lacustres que formam depósitos micríticos i

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Manica, Raquel de Mattos. "Ostracodes eomiocênicos da perfuração 2-RSS-1, Bacia de Pelotas, Atlântico Sudoeste." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/133201.

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Ostracodes são microcrustáceos que possuem uma carapaça bivalve constituída por quitina e carbonato de cálcio, que vivem em ambientes marinhos e não-marinhos. São amplamente utilizados em estudos paleoceanográficos e paleoclimáticos, sendo bons indicadores batimétricos, de salinidade e de temperatura. Nas bacias brasileiras, os ostracodes têm larga aplicação bioestratigráfica, especialmente em intervalos não marinhos cretáceos. Por sua vez, os ostracodes marinhos têm se destacado pelos bons resultados paleoceanográficos em bacias marginais, entre elas a Bacia de Pelotas. Este trabalho propõe n

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Egerquist, Eva. "Ordovician (Billingen and Volkhov stages) Brachiopod Faunas of the East Baltic." Doctoral thesis, Uppsala University, Palaeontology group, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4303.

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<p>Lower-Middle Ordovician (Arenig) successions in the East Baltic have been investigated for more than one hundred and fifty years. Nevertheless detailed sampling still yields new species and better knowledge of the environment in which these organisms lived. The successions are well suited for bed by bed sampling because of the lack of tectonic disturbance and because the sequences are well documented. </p><p>This study analyses collections of Billingen-Volkhov age mainly from the St. Petersburg region, but also from Estonia. A great deal of the material was obtained from the marly to clayey

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Mojon, Pierre-Olivier. "Les formations mésozoïques à charophytes (Jurassique moyen-Crétacé inférieure) de la marge téthysiennes nord-occidentale : (Sud-Est de la France, Suisse occidentale, Nord-Est de l'Espagne) : sédimentologie, micropaléontologie, biostratigraphie." Grenoble 1, 2001. https://theses.hal.science/tel-00546081.

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Le thème principal de ce travail de thèse se rapporte à l'étude micropaléontologique et sédimentologique des dépôts émersifs de la plate-forme jurassienne (S. -E. De la France et Suisse occidentale) entre le Jurassique moyen et le Crétacé inférieur (faciès purbeckiens et wealdiens). Grâce aux données complémentaires de coupes sélectionnées dans le N. -E. De l'Espagne (Maestrazgo) et le S. -E. De la France (Basse-Provence), une biozonation continentale principalement basée sur les Charophytes et un nouveau schéma phylogénétique des Clavatoracées (Charophytes) sont établis pour le Jurassique sup

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Bony, Guénaëlle. "Contraintes et potentialités naturelles de quelques sites portuaires antiques de Méditerranée et de mer Noire (Fréjus, Ampurias, Kition, Istanbul, Orgamé)." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM3039.

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Il y a 7000 ans BP, la stabilisation du niveau marin a entraîné la formation de deltas. Ces zones deltaïques abritent des milieux aux degrés de protection différents favorables à une activité maritime. Cependant, ces espaces sont soumis à des contraintes naturelles : à l'échelle de la longue durée, l'alluvionnement des deltas entraîne la mobilité des littoraux et le colmatage des milieux portuaires ; à l'échelle de l'événement, les tempêtes, les tsunamis et la mobilité crustale entraînent la destruction, la submersion ou le soulèvement des zones portuaires. Ce travail porte sur l'étude des con

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Ceolin, Daiane. "Ostracodes do cretáceo-paleógeno inferior da Bacia de Pelotas." Universidade do Vale do Rio dos Sinos, 2010. http://www.repositorio.jesuita.org.br/handle/UNISINOS/3084.

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Submitted by Vanessa Nunes (vnunes@unisinos.br) on 2015-03-21T13:53:52Z No. of bitstreams: 1 DaianeCeolin.pdf: 3969335 bytes, checksum: 5d7bd449fc1307161fd904deef944280 (MD5)<br>Made available in DSpace on 2015-03-21T13:53:52Z (GMT). No. of bitstreams: 1 DaianeCeolin.pdf: 3969335 bytes, checksum: 5d7bd449fc1307161fd904deef944280 (MD5) Previous issue date: 2010<br>CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>O presente trabalho consiste no estudo taxonômico dos ostracodes marinhos da bacia de Pelotas e os respectivos aspectos paleoecológicos da assembléia no int

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