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 124 for “"Conservation Status"”.
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Modeling NatureServe subnational conservation status ranks for Tennessee vascular plants
Conservation status ranks measure the potential risk of extinction for species at the global, national, and subnational levels, taking into account rarity, threats, and population trends. This study used the NatureServe system to generate provisionary subnational conservation status ranks (s-ranks) …
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Biology and conservation status of Juniperus macrocarpa Sm. in Sardinia
… results useful to support in situ and ex situ conservation actions. In particular, the specific aims of the thesis were: (1) to analyse morphological variation in seeds of Mediterranean Juniperus taxa (at inter- and intraspecific level) and morphometric differences in J. macrocarpa seeds …
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Assessing conservation status of remnant mammal populations in a Neotropical cloud forest
… hunting. Protected areas are a cornerstone of conservation policy and National Parks have notionally one of the highest status designations, yet in many instances such designation may not be effective in conserving biodiversity. This study assessed the efficacy of Cusuco National Park in …
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The natural vegetation of the Robertson Karoo : an evaluation of its conservation status
… many taxa and vegetation communities worthy of conservation. This thesis is concerned with aiding the future conservation of natural vegetation of the Robertson Karoo by assessing the threats to its survival and identifying priority conservation areas.
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A reassessment of the conservation status of a rare Florida endemic mint, Macbridea alba
… and despite their critical role in successful conservation and restoration efforts, plants lack adequate protection. At least 40% of all vascular plants on Earth face increased global risk of extinction. Effective conservation is often challenged by a lack of data to support management and …
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Global Conservation Status of Croaker and Drum (Family: Sciaenidae) and Role of the Maw Trade
… important, data regarding species’ population status and ecology are limited. In this study, I evaluated extinction risk for the 286 valid sciaenid species using the International Union for Conservation of Nature Red List methodology and explored impacts of the maw trade. About 10% of sciaenids …
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Global Conservation Status and Threat Patterns of the World’s Most Prominent Forage Fishes (Teleostei, Clupeiformes)
… and challenges humans face. Understanding the conservation status of taxonomic groups provides a systematic way to prioritize efforts to combat biodiversity loss. The 405 species within the order Clupeiformes are the herrings, shads, sardines, anchovies, menhadens and relatives that include …
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Elucidating the conservation status of Michigan's red-eared slider (trachemys scripta elegans): A phylogeographic approach
<p>The geographic origin of Michigan’s Trachemys scripta elegans has been a contentious subject since its first description in 1934. At that time two explanations were proposed: 1) populations of T. s. elegans are native to Michigan and naturally expanded their range from Ohio and Indiana; or 2) …
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Mammal conservation status and prospects for community-based wildlife management in coastal Guinea-Bissau, West Africa
… dar. Ziel dieser Studie war es, den Schutzstatus großer und mittlerer Säugetiere im Küstengebiet von Guinea-Bissau zu ermitteln, und die Aussichten für die Entwicklung von gemeinschaftlich getragenen Wildtiermanagementmodellen zu analysieren. Für die Verbreitungs- und Dichteermittlung bei …
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The historical exploitation of chondrichthyans in False Bay, South Africa and assessment of their conservation status
Commercial fishing in False Bay, South Africa, began in the 1600s. Today chondrichthyans are regularly taken in multiple fisheries throughout the Bay. Using time series data and life history information I assessed the vulnerability of chondrichthyans to exploitation in False Bay. Extensive time …
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Comparative Ecology and Conservation Status of Procambarus (Pennides) gibbus and Procambarus (Pennides) versutus in Marion County, Georgia
<p>Two crayfish species, whose conservation status was of concern, Procambarus (Pennides) gibbus Hobbs and Procambarus (Pennides) versutus Hagen, and one relatively common crayfish, Procambarus (Pennides) spiculifer LeConte were studied at nine creek sites in Marion County, Georgia. Major …
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Conservation in a changing world: assessing the conservation status of an agriculturally adapted species, the blue crane
With rapid human development and global change, conservation scientists need to stay abreast of changes to threatened species' demographics. The Blue Crane Anthropoides paradiseus has adapted to land-use change in some parts of its range. By the 1980s, numbers of cranes in their natural core range …
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An assessment of the distribution and conservation status of endemic and near endemic plant species in Maputaland
… near endemic plants and to carry out appropriate conservation actions. In this context, the main aim of the study was to document the distribution of the MCE endemic plant species, with particular emphasis on southern Mozambique. The study also aimed to document the threats to these species and to …
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The conservation status and dynamics of a protected African lion Panthera leo population in Kafue National Park, Zambia
… I aimed to address the paucity of management and conservation relevant data on Kafue's lion population. I first used a track-based occupancy survey to determine the broad-scale drivers of lion distribution in the park. My results did not support my a priori expectations of anthropogenic edge …
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Ecological role and conservation status of the endangered, native Fijian free-tailed bat (Mops bregullae, Felten 1964) in fragmented forest habitats
Bats of Fiji are of significant conservation value because they represent Fiji’s only native mammals and contain the most secure global populations of several threatened taxa. Bats are ecologically important as they provide critical ecosystem services of pollination and insect control in both …
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Systematic conservation planning and South Africa's Forest Biome: An assesment of the conservation status of South Africa's forest and reccomdentations for their conservation
… analysis and interpretation for a systematic conservation plan for the entire South African forest biome. This was done by addressing the following questions: What is the current state of the forest biome? How well are forests protected? How threatened are they? What are the conservation …
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A Juhdöglő-völgy Erdőrezervátum lignikol bazídiumos nagygombáinak taxonómiája és természetvédelmi helyzete = Taxonomy and conservation status of the lignicolous basidiomycetes in Juhdöglő-völgy Forest Reserve
A magyarországi hegységek közül a Vértes hazánk fungisztikai szempontból kevésbé vagy közepesen feltárt területei közé tartozik. A hegységből az első nagygombaadatokat tartalmazó publikációk egyike BOHUS (1939) munkája. Ezt követően sokáig nem végeztek szisztematikus fungisztikai felvételezéseket a …
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