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 23 for “"Plant conservation"”.
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The influence of white-tailed deer on plant communities in West Virginia and stakeholder attitudes toward deer management with respect to plant conservation
… deer (Odocoileus virginianus) may impact plant species by reducing individual survival or reduce reproductive potential by feeding on flowering parts or seeds. Herbivory may benefit plant populations by increasing dispersal of seeds. The combination of these factors may influence the …
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Aloe Pillansii on Cornell's Kop : are population changes a result of intrinsic life history patterns or climate change?
Aloe pillansii populations in the biodiversity hotspot of the Succulent Karoo in Southern Africa are thought to be under threat of extinction. This study investigated the population at the type locality; Cornell's Kop in the Richtersveld, South Africa. It has been suggested that theft, animal …
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Ecosystem goods and services in semi-arid lanscape : an examination of the relationship between ecological processes, land-use strategies and biodiversity conservation
… ecosystems is proceeding at unprecedented rates. Conservation areas are insufficient to protect all species and there is growing recognition of the need to promote biodiversity conservation on private land, through the adoption of biodiversity-friendly land-use practices. Conservation and …
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Current status and impact (2004-2015) of indigenous ungulate herbivory on the vegetation of Sanbona Wildlife Reserve in the Little Karoo
… into confined enclosed areas could alter plant communities and ecosystem processes. This is of particular concern in semi-arid rangelands of the Succulent Karoo where the evolutionary history of grazing is not clear and the compatibility of large herbivores in confined areas remains to be …
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Vegetation, diversity and rarity on the Cape Peninsula, South Africa
… Peninsula, (471 km2 ) with over 2285 vascular plant species, is characterised by the combination of a diversity of habitats supporting a mosaic of vegetation types. This study attempts describe. and explain some of the determinants of species pattern and distribution. The first part of the …
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Life history traits of South African Encephalartos spp. (Zamiaceae) and their implications for understanding population structure, responses to threats and effective conservation action
… was applied to cycads, the oldest living seeds plants which are at risk of extinction due to vulnerability to illegal wild harvesting and habitat loss. The study focused on South African cycad species within the genus Encephalartos, as well as two species from Swaziland. The first objective was …
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The demography of Acacia stands on the Hluhluwe-Umfolozi Game Reserve
Little is known about the demographics of the genus Acacia in Africa, despite its prominence and the economic and environmental importance of this group. The demographics and species composition of stands of four different Acacia species was investigated in the Hluhluwe-Umfolozi Game Reserve in …
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Land use and its impact on the Succulent Karoo
… to be the key factors in determining the future conservation of the area. Understanding the land use pattern and its drivers that have occurred in the SK biome provides a useful starting point for outlining the future research needs and establishing conservation goals. This project investigates a …
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Can nitrogen isotopes be used to detect the effects of burning on nitrogen cycling? A study on Pinus resinosa in Minnesota, USA
Pinus resinosa stands in Minnesota, USA were surveyed and fine and coarse roots from stands were analysed for nitrogen isotopes in an attempt to determine if fire effects nitrogen cycling. Fire increased the % nitrogen of coarse roots and changed the ratio of C: N. It may also decrease the depth of …
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The distribution and population structure of Aloe pillansii in South Africa, in relation to climate and elevation
South Africa comprises almost 10% of known plant species and also has the only arid zone "hotspot" defined worldwide, namely the succulent Karoo. Anthropogenic climate change predictions for South Africa suggest rapid climate change in the next 50 years will have adverse effects on its vegetation …
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Mapping Plant Biodiversity Hotspots at the County Scale: A New Tool for Establishing Resource Conservation Strategies
… models for establishing long-term resource conservation strategies at global scales. Since Myers, most of the subsequent studies using hotspot science for biodiversity modeling have used large spatial scales like countries, provinces or states, and other biogeoraphic regions. The California …
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The Ecology, Evolution, and Conservation of Stone Oaks (Lithocarpus)
This thesis investigates how plant traits, evolutionary history, and environmental conditions shape the ecology of Stone Oaks (Lithocarpus), a diverse but geographically restricted tropical clade. Chapter 1 introduces Lithocarpus as a model clade for investigating diverse ecological and …
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An assessment of environmental conservation and community participation processes in the Big 5 Hlabisa Local Municipality
Environmental conservation practices, processes, and strategies are an active area of scholarly research. This is the context within which this study assessed environmental conservation and community participation processes in the Big 5 Hlabisa Local Municipality, KwaZulu-Natal, South Africa. The …
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Applications of the IUCN Red List in evaluating global extinction risk of timber tree species.
… for rapid species assessment in order to inform conservation actions. However, the use of ‘big data’ is coming to the fore in ecological research, and offers a valuable chance to meet international assessment targets such as those of The Global Strategy for Plant Conservation (GSPC), which call …
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Mycorrhiza re-estalishment on post mined rehabilitated areas of the Brand se Baai Succulent Karoo vegetation
Submitted in partial fulfillment of the requirement for the degree of Master of Science in Environmental Impact Assessment
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A reassessment of the conservation status of a rare Florida endemic mint, Macbridea alba
Plants are foundational to the planet’s biodiverse ecosystems 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 …
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Impact of the Tsumeb smelter waste on plant species diversity and structure in Tsumeb, north-central Namibia
… to determine the impact of the smelter waste on plant species diversity and structure in the Tsumeb area. The most important sources of contamination are solid and gaseous emissions from the Tsumeb Smelter, airborne particles from the Tsumeb tailings pond and airborne particles from slag mill …
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Functional diversity of fungal symbiont communities and the impact of biotic and abiotic factors on their composition and assembly
Plants harbor tremendously diverse microbial symbiont communities (“the microbiome”) that affect the host fitness and response to environmental changes. Despite their importance, less attention has been given to the response of microbial symbionts to environmental difference, the understanding of …
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Using digitized herbarium specimens to predict potential distributions of Tennessee's historical angiosperm species
… (SDMs) have become an essential tool in focusing conservation efforts for species with incomplete distribution records. SDMs enable conservation managers to increase field survey efficiency by prioritizing areas to invest time and financial resources. This application is invaluable for historical …
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