Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"marine biodiversity"”.
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Predicting South Africa 's true marine biodiversity : a comparison of methods
The aims of this thesis are to estimate how many marine species remain to be described in this region and which areas are most in need of additional sampling effort.
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Marine Biodiversity of Antarctic Hard Rock Communities: Species Biomass and Energy Use
… rock communities, including surveys to quantify biodiversity and biomass (Ash Free Dry Mass, AFDM). In addition temporal changes in biodiversity since 1998 were evaluated in the same location. To do this all benthic organisms greater than 3mm in size were collected at 6m, 12m and 20m depth from …
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Significant Population Structure and Little Connectivity in South African Rocky Shore Species: Implications for the Conservation of Regional Marine Biodiversity
… 23% of the coastline is formally protected via marine protected areas (MPA) with 9% enforced as no-take zones. Even with this relatively high level of protection (as compared to other nations globally) the MPA network is still relatively sparse with protected areas that are on average ~110 km …
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Biodiversity patterns in False Bay: an assessment using underwater cameras
Understanding how marine biodiversity is distributed, and what drives these patterns, relies on good descriptions of marine ecosystems. This information should inform the protection of biodiversity and guide its management. Relationships between marine landscapes and biodiversity therefore need to …
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LA ACIDIFICAZIONE DEGLI OCEANI E IL DIRITTO INTERNAZIONALE
… to chemical alterations that severely impact marine ecosystems. Despite its ecological and socio-economic significance, there is no specific international legal regime that comprehensively addresses this issue. In this context, this thesis analyzes the regulation of ocean acidification within …
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Livelihoods of small-scale fishers of Struisbaai : implications for Marine Protected Area planning.
… is characterized by an increasing network of Marine Protected Areas (MPA), with the purpose of conserving fisheries resources and marine biodiversity. The coast is also home to over a hundred rural small-scale fisher communities, such as the community at Struisbaai Noord, which are considered …
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DNA+eDNA: integration of traditional and emerging tools for monitoring marine ecosystems
… accurate species identification for evaluating marine biodiversity, ecological roles, and conservation needs. Traditional taxonomy often struggles with the identification of cryptic species, leading to the reliance on molecular methods such as DNA analysis. These techniques have improved species …
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Reef Carbonate Budgets & Symbiodiniaceae Diversity in the Arabian Gulf, Western Indian Ocean & Central Indo-Pacific
… and Indonesia (located within the epicenter of marine biodiversity, the Coral Triangle - Central Indo-Pacific). In addition, genetic diversity of selected coral symbionts is investigated. In light of predicted warming trends, which present a threat to the structural integrity of reefs worldwide, …
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Global Conservation Status of Croaker and Drum (Family: Sciaenidae) and Role of the Maw Trade
… of extinction risk is critical to conserving marine biodiversity. Although marine bony fishes are some of the most diverse and abundant vertebrates in the world, overexploitation is the major threat to these taxa. Species in the family Sciaenidae are important marine resources in many parts of …
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Faunal biogeography, community structure, and genetic connectivity of North Atlantic seamounts
… understanding of the modern biogeography and biodiversity of deep-sea fauna. Seamounts are considered to play a defining role in faunal evolution, acting as regional centers of speciation, "stepping-stones" for dispersal, and/or refugia for deep-sea populations. The overarching goal of this …
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Automating Video Analysis for Marine and Behavioural Research: Deep Learning Solutions to Analytical Bottlenecks
… advances have dramatically increased marine data collection capacity, shifting the primary challenge in ocean science from data acquisition to data processing. An 'analytical bottleneck' now limits the extraction of ecological insight from information-rich datasets such as video …
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Oil sorption behavior of fibrous substrates
… behind on the sea, they also pose a risk to the marine biodiversity. Therefore, there is an urgent need to replace these synthetic fibers with cost-effective biodegradable fibers. The use of natural sorbents like wool, jute, straw and cotton grass is limited in oil spill cleanup due to their …
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The fate and impacts of microplastics in marine systems
Microplastic pollution prevails in marine habitats globally and is now regarded as one of the leading threats to marine biodiversity. Despite the recent increase in microplastic studies, there are a number of key areas that remain largely understudied. Furthering our knowledge of where and why …
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Faunal biogeography, community structure, and genetic connectivity of North Atlantic seamounts
… understanding of the modern biogeography and biodiversity of deep-sea fauna. Seamounts are considered to play a defining role in faunal evolution, acting as regional centers of speciation, “stepping-stones” for dispersal, and/or refugia for deep-sea populations. The overarching goal of this …
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A Test of the Area of Refuge Hypothesis in Indo-Pacific Marine Biogeography
… hypotheses have been proposed to explain the marine biogeographic patterns of species richness of the Indo-Pacific. One of these hypotheses suggests that available habitat area is the main predictor of species richness. This is the basis for the area of refuge hypothesis that attempts to …
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Population Structure of Lethrinus Lentjan (Lethrinidae, Percoidei) Across the South China Sea and the Philippines Is Detected With Lane-Affected RADSeq Data
<p>Southeast Asia includes the Coral Triangle, a marine biodiversity hotspot that supports important fishery resources experiencing varied threats. Patterns of speciation and population structure in the Coral Triangle have been examined to test hypotheses relating to the historical geologic …
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Investigating the ecological and economic consequences of marine climate change in UK waters
Climate change is of concern for both marine biodiversity and the human societies that are supported by it. Predictive models are required to assess potential responses of socio-ecological systems to climate change, implement measures to enhance their adaptability, and ensure the persistence of …
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The Role of Social, Economic, and Political Factors in the Design and Establishment of Antarctic Marine Protected Areas
… contributed to significant declines in global marine biodiversity. This global environmental crisis has inspired international environmental regimes, such as the Convention on the Conservation of Antarctic Marine Living Resources (CCAMLR), to manage human activity and ensure the long-term …
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Characterising Antarctic marine invertebrate microbiomes and their antimicrobial potential
… warming that will negatively impact endemic marine biodiversity. Antarctic marine invertebrates living in the near-shore are likely to be affected profoundly by warming-related changes, and microbes could help their hosts respond to the demands of environmental change. Moreover, their …
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Parasite communities associated with the Cape gurnard (Chelidonichthys capensis) and the lesser gurnard (C. queketti) from South Africa
… knowledge of these demersal fish species and of marine biodiversity in South Africa.
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