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Dissertations / Theses on the topic 'Marine dispersal'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Phillips, Susan Elizabeth Penny. "Tertiary marine prosobranchs: larval dispersal and geographic range." Thesis, Virginia Tech, 1993. http://hdl.handle.net/10919/44171.

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2

Phillips, Susan Elizabeth Penney. "Tertiary marine prosobranchs : larval dispersal and geographic range /." This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08042009-040456/.

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3

Miller, Jessica Adele. "Local and regional patterns of transport, dispersal, and exchange in coastal fishes /." view abstract or download file of text, 2004. http://wwwlib.umi.com/cr/uoregon/fullcit?p3136435.

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Thesis (Ph. D.)--University of Oregon, 2004.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 215-240). Also available for download via the World Wide Web; free to University of Oregon users.

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4

Sumoski, Sarah E. "Mobile Animals as a Potential Dispersal Mechanism in Zostera marina (Eelgrass)." W&M ScholarWorks, 2012. https://scholarworks.wm.edu/etd/1539617931.

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5

Ullberg, Jörgen. "Dispersal in free-living, marine, benthic nematodes : passive or active processes?" Doctoral thesis, Stockholm University, Department of Zoology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-77.

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<p>Meiofauna, and especially marine nematodes are common in sediments around the world. Despite very wide ranging distributions in many nematode species, little is presently known about their dispersal mechanisms shaping these patterns. Rafting, and perhaps ballast water transport has been suggested as viable means for nematode long-range transport. On a much smaller scale other processes have been suggested for their dispersal. They generally include some form of passive suspension into the water column and later on a passive, haphazard settling back towards the bottom.</p><p>Small-scale phen

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Ullberg, Jörgen. "Dispersal in free-living, marine, benthic nematodes : passive or active processes? /." Stockholm : Zoologiska institutionen, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-77.

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7

Irisson, Jean-Olivier. "Approche comportementale de la dispersion larvaire en milieu marin = Behavioural approach to larval dispersal in marine systems." Phd thesis, Ecole pratique des hautes études - EPHE PARIS, 2008. http://tel.archives-ouvertes.fr/tel-00344625.

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La plupart des organismes marins démersaux présentent une phase larvaire pélagique avant le recrutement dans la population adulte. Cet épisode pélagique est souvent la seule opportunité de dispersion au cours du cycle de vie. De ce fait, il structure les connections entre populations, qui régissent la dynamique et la composition génétique des métapopulations benthiques. Cependant, ces "larves" ne sont pas de simples ébauches des adultes, dispersées au gré des courants en attendant leur métamorphose. Ce sont des organismes souvent très spécifiquement adaptés à leur milieu. Dans cette thèse nous

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8

Van, der Heyden Sophie. "Testing ubiquitous dispersal and freshwater/marine divergence in free-living protist groups." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409856.

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9

Hobday, Alistair James. "Faunal patterns and dispersal on kelp rafts in Southern California /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p3035917.

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10

Ockhuis, Samantha Angelique Natasha. "The “suitcase hypothesis” – can eddies provide a pathway for gene flow between Madagascar and KwaZulu-Natal?" Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2475.

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Thesis (MTech (Oceanography))--Cape Peninsula University of Technology, 2016.<br>Similarities in marine fauna found off the coasts of southern Madagascar and KwaZulu-Natal (KZN, South Africa) led to the development of the “Suitcase Project”, with the aim of establishing whether eddies that form off southern Madagascar may package and transport biological material, as if in a suitcase, across the Mozambique Channel. In pursuit of this question, sampling was conducted on the southern Madagascan shelf and along a transect across a cyclonic eddy which originated off the southern tip of Madagascar,

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11

Johnson, Collin Hauer. "Self-fertilization, Larval Dispersal, and Population Structure in the Marine Bryozoan Bugula stolonifera." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10180.

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Although the process by which fertilization occurs in bryozoans is well described, the ability to self-fertilize and the subsequent ecological consequences are poorly understood. Culturing experiments were conducted examining the effects of selfing on offspring survival and reproduction in the simultaneous hermaphrodite Bugula stolonifera collected from Eel Pond, Woods Hole, MA. Results from these experiments document significant decreases in survival and fecundity of selfed offspring, compared to outcrossed controls, suggesting that these animals are not routinely self-fertilizing in Eel Po

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12

Goldstien, Sharyn Jane. "Phylogeography of the Cellana limpets of New Zealand: Investigating Barriers to Marine Dispersal and Historical Biogeography." Thesis, University of Canterbury. Biological Sciences, 2005. http://hdl.handle.net/10092/1334.

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New Zealand is a continental island surrounded by deep-ocean, with a complex system of currents and oceanographic anomalies that may serve to isolate populations of coastal marine organisms. In particular Cook Strait is a 26 km wide body of water separating the North and South Islands which is characterised by complex interactions of tides and converging water masses. Cook Strait is a geologically recent formation that may also impart an historical influence on the biogeographic distribution of coastal marine taxa. In order to investigate the phylogeographic structure of coastal marine taxa ar

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13

Lockwood, Dale Richard. "The effects of larval dispersal and spatial heterogeneity on the design of marine reserves /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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14

Pearce, Alan Frank. "Oceanographic processes governing the dispersal and recruitment of marine larvae off South-Western Australia." Thesis, Curtin University, 2016. http://hdl.handle.net/20.500.11937/1372.

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Larval and juvenile recruitment of two Abudefduf damselfish species at Rottnest Island vary both seasonally and inter-annually. Biological and oceanographic factors together support the conjecture that the larvae originate at the Abrolhos Islands some 300 km to the north and are dispersed southwards in the Leeuwin Current. There are very strong links with environmental indices, with enhanced recruitment when the Leeuwin Current is flowing strongly and ocean temperatures are elevated, which generally occurs during La Niña events. This was especially evident during the intense La Niña event whic

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15

Manley, Stephen R. "The Roles of Dispersal and Predation in Determining the Seedling Recruitment Patterns of a Zostera marina System." W&M ScholarWorks, 2014. https://scholarworks.wm.edu/etd/1539617948.

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Seed dispersal and seed predation are two important processes in the early life history of plants. The interaction between these two processes influences the population recruitment from a parent plant. These mechanisms have been studied extensively in terrestrial plants and have resulted in various models to describe plant recruitment (e.g. Janzen-Connell, Hubbell, McCanny). However, seed dispersal and predation may also influence the population recruitment of marine angiosperms, such as Zostera marina (eelgrass). The objectives of this study were to determine: 1.) the patterns of seed dispers

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Reyns, Nathalie Brigitte. "Biophysical dispersal dynamics of the blue crab in Pamlico Sound, North Carolina." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-10312004-143755/.

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For many species such as the blue crab, Callinectes sapidus, successful estuarine recruitment to juvenile nursery habitats is dependent on the biophysical processes experienced during dispersal of the early life stages. The goal of this study was to determine how blue crab primary (postlarval) and secondary (early juvenile) dispersal occurs within a predominately wind-driven estuary, Pamlico Sound, North Carolina, USA. We (1) characterized circulation patterns in Pamlico Sound during the fall blue crab recruitment months over two consecutive years using current meters (2) sampled during multip

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17

Mai-Prochnow, Anne Gerda Erna Biotechnology &amp Bio-molecular Sciences UNSW. "Autolysis in the development and dispersal of biofilms formed by the marine bacterium Pseudoalteromonas tunicata." Awarded by:University of New South Wales. Biotechnology and Bio-molecular Sciences, 2006. http://handle.unsw.edu.au/1959.4/25537.

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The marine bacterium Pseudoalteromonas tunicata produces target-specific inhibitory compounds against bacteria, algae, fungi and invertebrate larvae and is frequently found in association with living surfaces in the marine environment. This study examined the ability of P. tunicata to form biofilms under continuous culture conditions within the laboratory. P. tunicata biofilms exhibited a characteristic architecture consisting of differentiated microcolonies surrounded by water-channels. Interestingly, a repeatable pattern of cell death in the centre of microcolonies was observed. The antibact

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18

Brink, Laura Ann. "Cross-shelf transport of planktonic larvae of inner shelf benthic invertebrates." Thesis, Thesis (M.S.)--University of Oregon, 1996, 1997. http://hdl.handle.net/1794/10073.

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19

Harwell, Matthew C. "Ecological dispersal mechanisms, reproductive ecology, and the importance of scale in Zostera marina in Chesapeake Bay." W&M ScholarWorks, 2000. https://scholarworks.wm.edu/etd/1539616688.

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Previous knowledge of the seed ecology of the clonal seagrass Zostera marina L. (eelgrass) suggests that sexual reproduction is not very important to the population dynamics of eelgrass; however, researchers have hypothesized long-distance dispersal for nearly a century. From a bay-wide sampling effort, viable eelgrass seeds in the seed bank were found throughout most of the lower and middle Chesapeake Bay, but abundance of seeds was highly variable. Lower seed-bank densities were found in middle Chesapeake Bay, the region with slow recovery of eelgrass populations. From natural and artificia

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20

Galindo, Heather Michelle. "Traveling into the unknown : using genes to track marine larval dispersal across ecological and evolutionary timescales /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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21

Blanco, Sánchez Marta. "Historia de vida temprana e inversión reproductiva de invertebrados bentónicos: integración al manejo y conservación a través de modelos de dispersión = Early life and reproductive investment of benthic invertebrates: integration to management and conservation throught dispersal models." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/666608.

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Las zonas costeras son uno de los ecosistemas que sufre mayor impacto antrópico a nivel mundial. La sobreexplotación de los recursos marinos es una de las actividades humanas que genera mayor impacto, reduciendo la abundancia y tamaño de las especies objetivo. Una de las medidas para proteger estos ecosistemas consiste en el establecimiento de áreas marinas protegidas. En Chile, el sistema actual de manejo de las pesquerías artesanales de especies bentónicas está basado en áreas parcialmente protegidas, las Áreas de Manejo y Explotación de Recursos Bentónicos (AMERBs), lo que ha supuesto una m

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22

Watts, Ashleigh Marie. "Biofouling patterns and local dispersal in an aquaculture system in the Marlborough Sounds, New Zealand." Thesis, University of Canterbury. School of Biological Sciences, 2014. http://hdl.handle.net/10092/9762.

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Biofouling pests, including non-indigenous species, can have significant impacts on anthropogenic activities. This is particularly true for aquaculture industries, where biofouling communities grow on crop species and infrastructure, potentially reducing revenue and increasing processing and production costs. It is of interest to marine farmers and scientists to gain a better understanding of the processes facilitating the regional proliferation and spread of biofouling pests. The structure of biofouling communities associated with marine farms in New Zealand’s main mussel growing region, Pelo

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23

Chaves-Fonnegra, Andia. "Increase of Excavating Sponges on Caribbean Coral Reefs: Reproduction, Dispersal, and Coral Deterioration." NSUWorks, 2014. http://nsuworks.nova.edu/occ_stuetd/5.

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Coral reefs ecosystems are deteriorating and facing dramatic changes. These changes suggest a shift in dominance from corals to other benthic organisms. Particularly in the Caribbean Sea, with corals dying, sponges have become the leading habitat-forming benthic animals. However, little is known about what life-history traits allow organisms to proliferate in a marine system that is undergoing change. Thus, the objective of this dissertation was to try to understand the current increase of encrusting excavating sponges on deteriorating Caribbean coral reefs through the study of reproduction, r

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24

Darcy, Meaghan Christian. "Influence of habitat corridors on dispersal success, predation induced mortality and colonization of estuarine macrofauna in seagrass." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-11202003-084325/.

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A habitat corridor is a landscape feature that is hypothesized to promote dispersal between habitat patches that would otherwise be isolated, and promote population persistence. Habitat corridors have not been widely explored in marine and estuarine systems. We used artificial seagrass units (ASUs) placed on unstructured sediment in Middle Marsh and Drum Shoals, Back and Bogue Sounds, North Carolina to create seagrass patches (1m2 and 4m2) separated by bare sediment or connected by additional ASUs, which made up a habitat corridor. We assessed the interactive effects of habitat corridor (prese

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25

Jones, Benjamin Thomas. "Trait-based modeling of larval dispersal in the Gulf of Maine." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112889.

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Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Biology; and the Woods Hole Oceanographic Institution), 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 151-163).<br>Population connectivity is a fundamental process that governs the spatial and temporal dynamics of marine ecosystems. For many marine species, population connectivity is driven by dispersal during a planktonic larval phase. The ability to obtain accurate, affordable, and meaningful estimates of larv

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26

Brumbaugh, Daniel Robert. "The evolution of modular adaptation : experimental studies of dispersal and growth in the marine colonial hydroid, Aglaophenia struthionides /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/5233.

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27

Amaral, Wasielesky Ana. "Does current-driven dispersal explain local benthic diversity in the Mediterranean basin?" Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Local pattern of biodiversity depends on several factors. When examining the diversity of benthic species found on artificial substrates (initially free of life) that were deployed on the seabed, the colonization phase consists in the establishment of various species inhabiting different habitats from adjacent areas or from distant regions thanks to current-driven larval dispersal. This work focuses on the “colonization” step; we hypothesized that earlier colonization is mainly influenced by two interacting factors: the variety of habitats patches (both nearby the artificial structure as well

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Fazey, Francesca Margaret Catherine. "The role of buoyancy in the dispersal of marine plastic debris and the impact of biofouling : does size matter?" Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/15511.

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Recent studies suggest that a significant proportion of the plastic pollution that enters the sea is disappearing from the surface, despite being less dense than seawater. Observations across size classes show that it is particularly smaller plastics, <5 mm in length, that are susceptible to removal. The dynamics and transport mechanisms that determine the pathways taken by floating marine plastic debris are poorly understood and the processes causing this disappearance of plastic are unknown. A spatial gradient in the size composition of floating litter has also recently been observed by visu

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Fernandez-Gonzalez, Victoria. "Fouling amphipods on marine aquaculture facilities: ecological interactions and potential applications and potential applications." Doctoral thesis, Universidad de Alicante, 2017. http://hdl.handle.net/10045/89091.

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Aquaculture facilities involve mooring a large amount of artificial structures in offshore areas, which are colonised by a wide group of marine organisms, forming characteristic fouling communities. Many studies have focused on determining what sessile organisms are able to settle on nets, ropes and buoys, owing to the specific problems they cause and their economic cost to the aquaculture industry. Although sessile fouling communities are well-studied from the point of view of controlling this community on aquaculture facilities, little is known about the epifaunal mobile species inhabiting t

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30

McCulloch, Anita. "Nearshore topographic fronts : their effect on larval settlement and dispersal at Sunset Bay, Oregon." Thesis, Thesis (M.S.)--University of Oregon, 2001, 2001. http://hdl.handle.net/1794/10077.

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31

Ruggiero, Maria Valeria. "Spatial genetic structure in the clonal marine angiosperm Cymodocea nodosa : the influence of dispersal potential, mating system and species interactions." Thesis, Open University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409867.

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32

Turner, James W. "Dispersal and provenance of fine-grained sediments and the influence of marine transgression on the Ross Sea continental shelf, Antarctica /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487779439846251.

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33

Guillaumot, Charlène. "Modelling the response of Antarctic marine species to environmental changes. Methods, applications and limitations." Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/327073.

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Among tools that are used to fill knowledge gaps on natural systems, ecological modelling has been widely applied during the last two decades. Ecological models are simple representations of a complex reality. They allow to highlight environmental drivers of species ecological niche and better understand species responses to environmental changes. However, applying models to Southern Ocean benthic organisms raises several methodological challenges. Species presence datasets are often aggregated in time and space nearby research stations or along main sailing routes. Data are often limited in n

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Ross, Rebecca E. "Investigating the role of larval dispersal models in the development of an 'ecologically coherent' network of deep sea marine protected areas." Thesis, University of Plymouth, 2016. http://hdl.handle.net/10026.1/6560.

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There is currently worldwide pressure to establish Marine Protected Area (MPA) networks which are self-sustaining and will persistently protect habitats and species. In order for MPA networks to be effective, the species targeted for conservation must be able to disperse between protected areas and maintain a gene-flow necessary for population sustainability and persistence. This warrants new research on how to quantify and map faunal dispersal to ensure that protection will be effective and sustainable. Population genetic methods have merit, with the ability to track parentage and gene flow b

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35

Domínguez-Contreras, José F., Adrian Munguia-Vega, Bertha P. Ceballos-Vázquez, et al. "Life histories predict genetic diversity and population structure within three species of octopus targeted by small-scale fisheries in Northwest Mexico." PEERJ INC, 2018. http://hdl.handle.net/10150/627160.

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The fishery for octopus in Northwest Mexico has increased to over 2,000 tons annually, but to date the specific composition of the catch has been ignored. With at least three main species targeted by artisanal fisheries in the region with distinct life histories, the lack of basic biological information about the distribution, metapopulation size and structure of each species could impede effective fisheries management to avoid overexploitation. We tested if different life histories of three species of octopus could help predict observed patterns of genetic diversity, population dynamics, stru

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Callwood, Karlisa A. "Use of Larval Connectivity Modeling to Determine Settlement Habitats of Panulirus argus in The Bahamas as a Pre-cursor to Marine Protected Area Network Planning." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_theses/59.

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Caribbean spiny lobster (Panulirus argus) is a popular and heavily exploited seafood throughout its range. This species supports the primary fishery in many Caribbean countries, especially in the Bahamas, which reports the highest catches and where spiny lobster serves as the number one food export. P. argus possesses one of the longest pelagic larval durations of any marine species, ranging from 6-12 months. This allows for the possibility of long-range dispersal, which would make it difficult to determine if local adult populations originate from areas close-by or within the same countrie

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Drexler, Michael. "Evaluating the use of larval connectivity information in fisheries models and management in the Gulf of Mexico." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7499.

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Connectivity is a major contributor to the overall dynamics of marine populations. However, it still remains challenging to describe connectivity on ecologically meaningful scales of time and space. This is a major impediment to evaluating the impacts of marine protected area with respect to fisheries management objectives. This dissertation brings together a wide array of spatial and connectivity information in the Gulf of Mexico (GOM) with the goal of 1) understanding the spatial distribution of fish populations and source-sink dynamics and 2) evaluating whether this information can be int

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McClees, Whitney Elizabeth. "Anthropogenic Effects on the Fouling Community: Impacts of Biological Invasions and Anthropogenic Structures on Community Structure." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3883.

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Coastal anthropogenic infrastructure has significantly modified nearshore environments. Because these structures often have a strong association with shipping as would be found in ports and harbors, they have been identified as invasion hotspots. Due to propagule pressure from shipping and recreational boating and suitable uncolonized substrate that provides a refuge from native predators, a greater number of non-native species have been found on these structures compared to nearby natural substrate. The mechanisms that limit the spread of non-native species from anthropogenic structures to na

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Barrier, Céline. "Modélisation biophysique de la dispersion larvaire pour l’étude de la connectivité des zones fonctionnelles halieutiques en Méditerranée." Electronic Thesis or Diss., Corte, 2024. http://www.theses.fr/2024CORT0017.

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La connectivité, concept vaste et multidimensionnel, joue un rôle essentiel dans la compréhension des interactions au sein des écosystèmes, qu'ils soient terrestres ou marins. Elle fait référence aux flux de matière, d'énergie et d'organismes qui se déplacent et interagissent à travers les habitats, influençant la dynamique des populations et leur résilience face aux perturbations. Cette thèse se concentre sur l'étude de la connectivité dans les écosystèmes marins côtiers méditerranéens, et plus précisément sur la dispersion larvaire des espèces à cycle de vie biphasique. L'objectif principal

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Schunter, Celia. "Challenges in marine ecology: genomic investigations of dispersal patterns and phenotypic plasticity in Mediterranean Fishes = Desafíos en ecología marina: investigaciones genómicas de los patrones de dispersión y de la plasticidad fenotípica en peces del Mediterráneo." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/129073.

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One of the most important challenges in marine ecology is understanding the dispersal capabilities of species. Connectivity, if from en evolutionary perspective or a more current ecological perspective, is highly important in determining the natural regulation of populations. By considering both time scales, it is possible to estimate the persistence of a species and its populations. Hence, correct management decisions on conservation issues should include genetic population data combined with oceanographic processes as well as direct measurements of larval dispersal for the full understanding

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Johnson, Linda Gail. "Effects of habitat patch size and isolation on the population structure of two siphonarian limpets." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1005364.

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Habitat fragmentation is a fundamental process that determines trends and patterns of distribution and density of organisms. These patterns and trends have been the focus of numerous terrestrial and marine studies and have led to the development of several explanatory hypotheses. Systems and organisms are dynamic and no single hypothesis has adequately accounted for these observed trends. It is therefore important to understand the interaction of these processes and patterns to explain the mechanisms controlling population dynamics. The main aim of this thesis was to test the effect of patch s

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Guillaumot, Charlène. "Modelling the response of Antarctic marine species to environmental changes. Methods, applications and limitations." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2021. http://www.theses.fr/2021UBFCK020.

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Parmi les outils qui permettent de mieux comprendre les systèmes naturels, la modélisation écologique a connu un essor particulièrement important depuis une vingtaine d’années. Les modèles écologiques, représentation simplifiée d’une réalité complexe, permettent de mettre en avant les facteurs environnementaux qui déterminent la niche écologique des espèces et de mieux comprendre leur réponse aux changements de l’environnement. Dans le cas des faunes marines antarctiques, la modélisation écologique fait face à plusieurs défis méthodologiques. Les jeux de données de présence des espèces sont tr

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Gudmundson, Sara. "Stabilizing factors in spatially structured food webs." Thesis, Linköping University, Linköping University, Theoretical Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18657.

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<p>Ecological models have problems showing the positive relationship between diversity and stability found in nature. Theory states that complex food webs have high extinction risks and low stability. However, persistent food webs found in nature are large and complex containing many interconnections between species. There are many possible mechanisms enabling persistent food webs such as; complex interaction patterns, asynchronous fluctuations of species densities, environmental fluctuations and spatial distribution. These factors have not been used in classical models. In this study, coloure

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Snäll, Tord. "Distribution Patterns and Metapopulation Dynamics of Epiphytic Mosses and Lichens." Doctoral thesis, Uppsala University, Department of Evolutionary Biology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3904.

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<p>This thesis examines the relative importance of local conditions, dispersal and dynamics of the trees on epiphyte distribution patterns and colonization-extinction dynamics. Study species are the mosses <i>Orthotrichum speciosum </i>and <i>O. obtusifolium</i>, and the red-listed <i>Neckera pennata</i>. The thesis also includes an attempt to parameterize a model for a lichen metapopulation (<i>Lobaria pulmonaria</i>) in a dynamic landscape, based on only presence/absence data of the epiphyte and its host trees. </p><p>The results show that epiphyte colonization of trees is affected by both l

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Bernard, Andrea M. "Population Connectivity in the Ocean: A Genetic View of Upper Trophic Level Fishes Displaying Contrasting Life Histories." Thesis, NSUWorks, 2014. https://nsuworks.nova.edu/occ_stuetd/86.

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Discerning the extent and patterns of genetic connectivity and understanding population demographic processes is essential for framing proper management and conservation measures for species of concern. Although genetic connectivity may be influenced by numerous biotic and abiotic factors, habitat utilization and dispersal potential are often key factors driving connectivity, especially in marine fishes. While dispersal potential is of key importance with respect to shaping connectivity, other extrinsic (e.g., oceanographic processes) and intrinsic (e.g., reproductive behavior) factors may als

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Blouet, Sylvain. "Vers une approche spatialisée de la planification spatiale marine : cas d’étude pour des populations d’invertébrés sessiles dans le Golfe du Lion." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS292.

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La planification spatiale marine est un enjeu d’avenir pour la conservation des ressources marines, mais notre compréhension de l’agencement spatial des zones de conservation et des zones d'aménagement pour favoriser la persistance des populations n’est pas si claire. L’étude des échelles spatiales structurant la distribution des espèces et des processus influençant la dynamique et la persistance des populations marines est donc essentielle pour une approche spatialisée de l'organisation des espaces marins. Ce travail de thèse s’est donc organisé autour de deux objectifs : (i) appréhender les

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Underwood, Jim. "Routine and rare genetic connections in corals off northwest Australia and the implications for conservation." University of Western Australia. School of Animal Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0158.

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[Truncated abstract] The extent to which marine populations are connected by larval dispersal is crucial to their distribution, maintenance and diversity. Thus, for the effective conservation of threatened systems such as coral reefs, understanding patterns of connectivity is essential. However, the biophysical mechanisms that retain or disperse larvae within and among populations are poorly understood. Though the open ocean environment provides the opportunity for long-distance dispersal, if this potential is only rarely realised, recruits produced from afar are unlikely to contribute to the

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Pattrick, Paula. "Larval fish dynamics in the shallow nearshore of Eastern Algoa Bay with particular emphasis on the effects of currents and swimming abilities on dispersal." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1005139.

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The larval fish assemblage in the shallow, nearshore region of a proposed marine protected area (MPA) in eastern Algoa Bay, temperate South Africa was investigated. Current velocities and direction and the swimming abilities of late-stage larvae were further assessed to determine potential larval movement to and from the MPA. In total, 6045 larval fishes were collected along two depth contours (~5m and ~15m) in the shallow nearshore of eastern Algoa Bay using stepped-oblique bongo net tows, twice per season for two years (March 2005 – January 2007). These larvae represented 32 families and 78

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Klenk, Theodore Charles. "The effect of sewage on the distribution of seaweed at the Bats Cave east bank sewage outfall in East London, South Africa." Thesis, Rhodes University, 1985. http://hdl.handle.net/10962/d1004768.

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In order to determine which seaweeds were unable to survive in the stressed area and how far the effect of the effluent extended along the coast, various methods were applied and carried out over a two-year period between November 1982 and November 1984. Three major long-term studies took place. The first study was to determine the presence or absence of the seaweeds throughout (1) the entire study area and then (2) in areas broken up into sections with known distances from the outfalls. The second method involved statistical evaluations using point intersect methods and photography to produce

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Puls, Amy L. "Transport of zooplankton in South Slough, Oregon." Thesis, Thesis (M.S.)--University of Oregon, 2002, 2002. http://hdl.handle.net/1794/10057.

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