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 12 of 12 for “"umbrella species"”.
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Born To Be Wild: Tiger Persecution and Advocacy From 1800 to the Present
… abundant in many of Asia’s forests. The entire species now hovers dangerously close to extinction. Population declines within the last two centuries are blamed largely on loss of habitat, reductions in prey species, poaching, and human-tiger conflict. Modern tiger conservation efforts focus on …
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The influence of habitat features and co-occurring species on puma (Puma concolor) occupancy across eight sites in Belize, Central America
… lacking. I used single- and multi-season, single-species occupancy models and two-species co-occurrence models to analyze camera trapping and habitat data collected at eight study sites across Belize. Puma occupancy was positively influenced by jaguar trap success, understory density, canopy …
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Using primates to establish priority conservation sites in Mexico.
Suitable habitat for some of the most threatened species is dwindling fast and with limited conservation resources available, it is essential that we invest those resources in areas with great biodiversity value. The Uxpanapa Valley in Mexico is one of Mesoamerica's largest forest remnants, is …
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Designing against habitat loss: Facilitating movement of the Louisiana black bear
… (2) climate-related migration of the subspecies, and (3) more amicable coexistence of bears and humans. In May 2019, the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) released its Global Assessment Report on Biodiversity and Ecosystem Services, …
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Grazing and Climate Effects on High Elevation Meadow Resources
… urophasianus) has commonly been used as an umbrella species for restoration of sagebrush ecosystems in rangelands, due to its status as an indicator of overall rangeland health. Scarce mesic resources may lead to an energetic bottleneck for juvenile sage grouse, limiting fitness and survival …
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Towards scalable modern marine ecosystem monitoring
… while ecosystems, often represented by iconic umbrella species such as North Atlantic right whales, emperor penguins, and coral reef ecosystems, face mounting anthropogenic pressures. Addressing these data gaps requires fundamentally better ocean observation capabilities, yet progress is …
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A Global GIS Analysis of Primate Diversity and Biogeography: Assessing Trends in Habitat Loss and Extinction Risk to Inform Primate Conservation
… which are one of the most diverse and threatened species groups on earth with more than two-thirds classified as “Threatened” (i.e. Vulnerable, Endangered or Critically Endangered) by the IUCN. Primates are keystone species and essential to ecosystem function through their roles as pollinators and …
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On the use of demographic models to inform amphibian conservation and management: A case study of the reticulated flatwoods salamander
… the Apalachicola-Flint Rivers, the range of this species has been drastically reduced. It is currently listed as federally endangered under the Endangered Species Act (ESA). Population viability analyses (PVAs) represent a key component of many recovery plans for threatened and endangered species. …
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Determining habitat and biotic factors driving puma (<i>Puma concolor</i>) space use and underlying dynamic processes (colonization and extinction) over 20 years in protected and private areas throughout Belize, Central America
… trophic levels, and habitat. We used single-species, single-season and multi-season occupancy modeling to explore factors influencing distribution and persistence of pumas across the country of Belize. We used camera trapping data from 7 protected areas over 20 years with 2,198 camera …
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Following the Herd: Modeling Mule Deer Resource Selection in an Era of Solar Expansion
… Mule deer can function as an indicator or umbrella species for other sagebrush-dependent species because they are migratory and require a great deal of space, and preserving habitat for them will benefit other species in the ecosystem. In many areas within the geographic range of mule deer, …
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Habitat and population structure of the Morelet’s crocodile (Crocodylus moreletii) in Calakmul Biosphere Reserve, Campeche, Mexico
… moreletii) is an apex predator and a flagship species inhabiting these aquatic environments, but only rudimentary information about this species exists in the region.This PhD project contributes to current knowledge on aquatic habitat in Calakmul Biosphere Reserve (CBR) and characterizes aguada …
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Conservation of endemic species in China
… in the world, harboring more than 10% of the species in the world. Among them, 11% of the vertebrate genera and 7% plant genera are endemic to China. During its rapid social and economic development, increasing habitat loss and fragmentation have occurred. However, it wakes up to the threats …