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 25 for “"habitat disturbance"”.
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Advancing UAV-Based Remote Sensing and Machine Learning for Ecological Monitoring, Habitat Disturbance Detection, and Forensic Science in Arid Landscapes
… learning algorithms, researchers can now analyze habitat disturbances, vegetation cover, and even the detection of threatened and endangered species with unprecedented precision. This synergy not only facilitates assessments of vegetation cover and health but also enhances the detection of …
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Elephant endurance in Aceh: the effects of habitat disturbance and land cover change on the conservation of Sumatran elephants in Aceh, Indonesia
… the spatial patterns of deforestation and habitat use of elephants. Deforestation data was obtained from remotely sensed imagery and elephant habitat use was assessed by means of ecological niche modelling. The Sumatra-wide impact of deforestation on elephant population survival was …
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The effects of habitat disturbance, host traits, and host physiology on patterns of gastrointestinal parasite infection in black howler monkeys (Alouatta pigra)
Anthropogenic forest disturbance associated with the conversion of forest into monocultures for agricultural production or cattle ranching, and the increased human presence linked to wood extraction and selective logging, can alter host-parasite dynamics and increase the risk of infectious diseases …
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Influence of Habitat Disturbances on Endemic Grassland Bird Distributions in Loamy Ecological Range Sites at Canadian Forces Base Suffield, Alberta
Many grassland birds are at risk and habitat disturbance may have an important influence on the persistence of these species. Military bases provide an opportunity to examine the influence of habitat disturbance on grassland birds, whose distributions are influenced by vegetation structure. Spatial …
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Adaptability and responses to threats in a highly successful rail, the pūkeko, Porphyrio melanotus melanotus
… effects invasive species and anthropogenic habitat disturbances can have; over 50 species have gone extinct since human arrival. However, not all native species have experienced such negative effects. The pūkeko (Porphyrio melanotus melanotus) is a widespread, common rail which …
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Avifauna and Anthropogenic Forest Disturbance in Two Biodiversity Hotspots.
… is to examine the impact of anthropogenic forest disturbance on avifaunal communities in two biodiversity hotspots- lowland tropical forest in the Lambusango Forest Reserve within the Wallacean archipelago and Neotropical cloud forest in Cusuco National Park, Mesoamerica. Both these study areas …
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Connecting the Plots: Anthropogenic Disturbance and Mojave Desert Tortoise (Gopherus agassizii) Genetic Connectivity
Habitat disturbance impedes connectivity for native populations by altering natural movement patterns, significantly increasing the risk of population decline. The Mojave Desert historically exhibited high ecological connectivity, but human presence has increased recently, as has habitat …
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The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies
… to species biodiversity are invasive species and habitat loss and degradation. Invasive species are often relatively insensitive to disturbance and many expand their range into disturbed and fragmented habitats. This dissertation uses an interdisciplinary approach to investigate how anthropogenic …
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Managing for long term sustainability of seafood production from bottom tendered wild capture fisheries
… fishing is an important source of anthropogenic disturbance affecting seafloor habitats across the world’s continental shelves. Minimizing these disturbances is a key objective of ocean management; however, opportunities to meet this objective have been hampered by limited information on the …
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A DYNAMIC LANDSCAPE OF FEAR: HUMAN IMPACTS ON CARNIVORE COMMUNITIES
… population declines due to landscape change and habitat disturbance. For researchers, carnivores present unique challenges due to their large home ranges, low population densities, sensitivity to human disturbance, and direct persecution. Further, growing evidence shows that human activity can …
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A Comparison of Management Strategies for the Federally Endangered Running Buffalo Clover (Trifolium stoloniferum) on the Blue Grass Army Depot, KY
… endangered plant that appears to depend on habitat disturbance, although proposed management strategies such as cattle grazing, mowing, and herbicide application have never been compared in a controlled study. We evaluate the efficacy of these techniques on the Blue Grass Army Depot (BGAD) …
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Causes and consequences of patchy spatial distribution in male and female fairy shrimp, Eubranchipus bundyi
… may be the result of egg hatching cues, microhabitat preferences in regards to light level, and the cryptic behavior of females. Behavioral differences between the sexes may expose males and females to different predators and food resources. The diel migration of both sexes may be responses to …
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Spatial distribution and density of the Lar gibbon Hylobates lar and Siamang Symphalangus syndactylus in relation to canopy structure and disturbance in a lowland dipterocarp forest, Sumatra.
… the relationship between primate populations and habitat characteristics is essential for their conservation. Indonesia is experiencing one of the highest rates of deforestation globally, and with such a large amount of historical logging having taken place, only ~3.8% of the remaining forest is …
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Gastrointestinal Parasite infections in Chacma Baboons (Papio ursinus) of the Cape Peninsula, South Africa: the influence of individual, group, and anthropogenic factors
Habitat disturbance can lead to the alteration of host-parasite dynamics and ultimately influence the mechanisms that regulate wildlife populations. This study investigates whether anthropogenic changes in the Cape Peninsula, South Africa, have affected gastrointestinal parasite infections in a …
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Annual Variation in Bee Community Structure in the Context of Disturbance (Niagara Region, South-Western Ontario)
… Differences in abundance for low and high disturbance sites decreased with years. Annual trends of generic richness resembled those detected for species. Likewise, similarity in genus and species composition decreased with time. Abundant and common taxa (13 genera and 18 species) were more …
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Effects of abiotic and biotic factors on population dynamics of brook trout (<i>Salvelinus fontinalis</i>) within Shenandoah National Park, Virginia
… products of anthropogenic activity, including habitat destruction and climate change. Monitoring aquatic ecosystems is important so that we can better understand and remedy the consequences of these threats. Native fish species found within these aquatic ecosystems are often used as quality …
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Impacts of habitat and landscape characteristics on reproductive ecology of female lesser scaup (Aythya affinis) in the boreal forests of Alberta
… it is imperative to understand how changes in habitat features and landscape changes could negatively impact breeding scaup; this information could also help to guide waterfowl conservation and management programs. It has been hypothesized that landscape modifications, such as agricultural and …
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Trophic relevance of gelatinous zooplankton for commercial fisheries in the Irish Sea
… feed on fish eggs and larvae. They also provide habitat and space for developing larval and juvenile fish which use their hosts as means of protection from predators and feeding opportunities. However, the broader ecological relevance of jellyfish is often neglected beyond their role as stressors …
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Responses of the Ocellated Turkey (Meleagris ocellata) to Human Disturbance
Habitat loss and habitat degradation are major drivers of the current biodiversity crisis. Nowhere else are these threats more severe than in the tropics. Because the tropics are estimated to contain as much as 60% of all the species on Earth, they are critically important for the conservation of …
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Ecology and conservation of Garra ghorensis, an endangered freshwater fish in Jordan
… surveyed sites, some alterations to the physical habitats and hydrology of the wadis were apparent, such as construction of impoundments. To assess the life history traits and feeding relationships of G. ghorensis, three locally abundant populations were studied. These were an allopatric …
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