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 21 for “"native biodiversity"”.
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An Invasive Species as a Threat to Native Biodiversity: Larval Competition Between Native Anurans and an Invasive Treefrog
… potential further westward, possibly impacting native anurans at multiple life stages. In anurans, competition at the larval stage can decrease adult fitness through slower development and smaller size at metamorphosis, ultimately decreasing recruitment rates. To examine the potential impacts of …
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Managing kangaroo grazing for the conservation of grassland and grassy woodland fauna
… grazing regimes can have a severe impact on native biodiversity. Restoration of grazing regimes which promote conservation of biodiversity is a priority in many protected areas. However, the ability to achieve this goal is limited by a lack of understanding of what ‘appropriate’ grazing …
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Managing kangaroo grazing for the conservation of grassland and grassy woodland fauna
… grazing regimes can have a severe impact on native biodiversity. Restoration of grazing regimes which promote conservation of biodiversity is a priority in many protected areas. However, the ability to achieve this goal is limited by a lack of understanding of what ‘appropriate’ grazing …
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La influencia del biocomercio en la cadena de valor de exportación de la nuez del Brasil entre los años 2012 y 2019
… that the Brazilian nut is a dried fruit of the native biodiversity and that it already complies with the definition BioTrade. Finally, we will present the results and analysis carried out on the Brazilian nuts exports value chain, as well as BioTrade. These results include figures, tables and …
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The Ecology and Demography of the Invasive Ascidian Botrylloides violaceus in the Coos Estuary
… are highly susceptible to invasion by non-native ascidian species. Botrylloides violaceus, a colonial ascidian, is a cosmopolitan invader of fouling communities in bays and harbors including Oregon’s Coos Estuary. This study documents seasonal and spatial patterns of B. violaceus …
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Floristics, Conservation, and Restoration of Virginia's Piedmont Grasslands
The native grasslands of Southeastern North America contain higher native plant diver- sity than the prairies of the Great Plains, but they have lost 90-99% of their historic range through disruption of their natural disturbance regimes and conversion to agricultural lands. To inform the …
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Many voices, one wilderness : collaborative conservation in the greater Chicago region
… corridors are needed to adequately protect native biodiversity. While most of the efforts to protect land on this scale have occurred in rural environments dominated by resource lands, an increasing number of efforts are occurring in urban environments. These locales are characterized by …
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Farm ponds of the eastern Great Plains: Key challenges and opportunities for conserving amphibians in these novel ecosystems
… fishing, but their role in supporting native biodiversity, including amphibians, remains poorly understood. In addition, it is unclear how farm ponds fit into existing frameworks of restoration and conservation. Despite their abundance, there are no large-scale initiatives in place to …
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Quantifying the Expansion of an Invasive Plant Species, Dog-strangling Vine (Vincetoxicum rossicum), in Environmental and Geographic Space Over the Past 130 Years
… plant species are an increasing global threat to native biodiversity. Effective management depends on accurate predictions of their spread. However, modelling the geographic distribution of invasive species, particularly with methods like correlative species distribution models (SDMs), is …
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Invasion and evolutionary history of a generalist fish parasite.
The introduction of non-native species can lead to the introduction of non-native parasites to their introduced range which can pose significant risk to native biodiversity. The cyprinid fish species, Pseudorasbora parva, is a well-studied example of accidental introduction to a new range; it has …
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Predicting the distribution and impacts of non-native birds in the Iberian Peninsula
… natural range boundaries by humans. These non-native species can have severe negative impacts on native biodiversity. In order to guide management of these species it is important to be able predict where non-native species will spread to, and what impact they will have. This thesis aims to …
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Host plant associations and chemical ecology of Cerambycidae
… a major threat to forest ecosystems, threatening native biodiversity, forest health, altering nutrient cycles, and deteriorating water and soil qualities. In the United States alone, economic losses are estimated to be around $120 billion, both from impact of invasive species to the environment …
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Detecting exploitable stages in the life history of koi carp (Cyprinus carpio) in New Zealand
… lakes may improve water quality and preserve native biodiversity. This study used telemetry to examine the movements and seasonal habitat use of adult koi carp to find key locations to efficiently remove koi carp from the lower Waikato River basin. Common carp are notoriously difficult to …
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Understanding the negative impacts and benefits of invasive alien populus Alba L: implications for management in South Africa
… that has become invasive in South Africa. Its native region ranges from Asia, Europe, and North Africa, and it was introduced to South Africa as an ornamental plant. However, the species has been reported to escape cultivation, posing threats to native biodiversity and agricultural productivity …
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Gut content analysis of trapped mustelids and trend analysis for ship rats and stoats over six trapping seasons at Mount Taranaki : A thesis submitted in partial fulfilment of the requirements for the degree of Master of Natural Resource Management and Ecological Engineering at Lincoln University
… responsible for some of the greatest losses to native biodiversity in New Zealand. Common methods to control these species include trapping, poison bait stations and aerially applied sodium fluoroacetate (1080). However, effective management through sustained control requires a complex …
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Mojave Desert restoration: drought and facilitation influences on plant communities and soil seed banks in annual grass invaded shrublands
Non-native grasses, like Bromus rubens, have become widespread in arid ecosystems across the western United States, including the Mojave Desert. Their prolific seed production and rapid spread pose significant threats to native flora and wildlife habitats. These invasive grasses alter fire cycles, …
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Applied ecology and management of the invasive topmouth gudgeon Pseudorabora parva in England & Wales.
Introduced species are a major threat to native biodiversity and, whilst there are socio-economic benefits often gained from introductions, there are also inherent risks to receiving ecosystems, particularly from those species that develop invasions. This is problematic, as once in the wild, their …
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IMPROVING THE ASSESSMENT OF SPREAD AND IMPACTS OF FRESHWATER INVASIVE SPECIES
… Earth’s surface, but they host 6-10% of global biodiversity and are considered endemism hotspots. Moreover, they provide ecological services for more than 6 billion people worldwide, thus their conservation is particularly relevant to preserve both biodiversity and human well-being. Despite …
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The dynamics of litterfall in eucalypt woodland surrounding pine plantations
… pose one of the greatest threats to global biodiversity and frequently result in the widespread loss of flora and fauna. Biological invasions have become a major focus of ecology in recent decades, and in particular, the invasive species radiata pine (Pinus radiata D. Don) is of considerable …
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