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 47 for “"anthropogenic changes"”.
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Andean sediment response to natural and anthropogenic changes at the catchment scale
… Soil erosion, driven by both natural and anthropogenic activities, further exacerbates the challenge for resource security. Soil erosion is contributing to increased levels of sediment in river systems threatening crucial river functions, including crop irrigation, drinking water, and …
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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
This study investigates whether anthropogenic changes in the Cape Peninsula, South Africa, have affected gastrointestinal parasite infections in a free-living population of chacma baboons (Papio ursinus). Data on parasite diversity and prevalence were obtained from 616 faecal samples collected from …
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Population and community responses to anthropogenic environmental changes
… Profiles; ROAPs) to explore the effects anthropogenic changes have on plant communities and bird populations. Chapter one investigates the influence of nutrient deposition on native prairie grass communities. I show that soil phosphorus levels alter plant diversity by changing the degree …
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The Effects of Wildfire Burn Severity on Bee and Wasp Communities Two Decades Post-Fire
… a natural disturbance in many global ecosystems, anthropogenic changes are affecting fire frequency, severity, and seasonality. Disturbances like wildfire affect bee and wasp communities, but recent meta-analyses are conflicted about whether fire harms or benefits insect pollinators. We …
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Riscos ambientais em comunidades subnormais - a comunidade Santa Clara no bairro do Castelo Branco
… the slopes, houses with structural hazards and anthropogenic changes in natural slopes, such as cutting and inappropriate cultivation of some plant species in unstable slopes. Were also seen major structural works undertaken by the municipal government, with respect to slope stabilization and …
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Identifying patterns and processes of sex-biases for an emerging fungal disease of wildlife
Anthropogenic changes have facilitated an increase in emerging infectious diseases, threatening biodiversity globally. Identifying the individuals, species, or communities most vulnerable to disease can guide the development of conservation priorities. Processes that structure individual variation, …
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The Biocentric Landscape Architect: Designing the Public Landscape, Benefiting the Natural World
… more harmonious relationship between nature and anthropogenic changes on the land, the green movement remains a loosely defined alternative undercurrent. The field of landscape architecture is uniquely poised to be a leader in the sustainable revolution; this is especially true when its …
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Timing and pattern of valley excavation, Le Sueur River, south-central Minnesota, USA
… the management of this basin to focus on the anthropogenic changes to the basin.
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Lipid biomarkers of coral stress : calibration and exploration
… by warming sea surface temperatures and other anthropogenic changes. The delicate symbiosis between corals and their algal endosymbionts (zooxanthellae) is easily disrupted by thermal stress, leading to bleaching and eventual mortality. The use of lipid ratios as biomarkers of environmental …
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Entangled Eden: ecological change and the Lake Huron Commercial Fisheries, 1835-1978
… The central focus of this project is Lake Huron. Anthropogenic changes in that lake’s environment dramatically affected the lives and relationships of its non-human inhabitants. The same changes also transformed relationships among human beings who relied on the lake’s resources. Commercial …
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Lipid biomarkers of coral stress : calibration and exploration
… by warming sea surface temperatures and other anthropogenic changes. The delicate symbiosis between corals and their algal endosymbionts (zooxanthellae) is easily disrupted by thermal stress, leading to bleaching and eventual mortality. The use of lipid ratios as biomarkers of environmental …
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Chemical and Degradation Characteristics of Soil Microbial Biomass
… and plays an important role in regulating anthropogenic changes to the global carbon and nitrogen biogeochemical cycles. It also plays essential roles in agricultural productivity, water quality, immobilization and transport of nutrients and anthropogenic chemicals, while also concealing …
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Late Holocene Paleoenvironmental Reconstruction in Barbados
… Mg substitution, which potentially represents anthropogenic changes to the island’s epikarst aquifer caused by European settlement and sugar cane cultivation on Barbados. Electron imaging revealed chemically distinct layers of detritus within the stalagmite sample, facilitating precise sampling …
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Exploration of natural climate variability and changes in future events using observations, proxy data and model simulations
… exploring the connection and interplay between changes in Earth's climate—comprising the physical interactions and states of the atmosphere,biosphere, hydrosphere, and cryosphere—in response to two main drivers: externally forced changes, such as those caused by human activities, volcanic …
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Fuel characterization using remote sensing in support of large-scale wildfire management in the Cerrado biome
… Cerrado’s stability has been threatened by anthropogenic changes in the fire regime. Managing fuels is one of the most important options we have for reducing wildfire’s negative impacts on society and the environment and amplifying positive ones on fire-dependent flora. Large areas such as …
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Tree Growth and Carbon Balance in a Temperate Forest Exposed to Elevated Carbon Dioxide for Eight Years
Anthropogenic changes in the atmosphere have focused attention on the global carbon cycle. Increases in atmospheric CO2 concentrations strongly influence plant carbon uptake and because forests account for the bulk of terrestrial productivity the future role of forests in the carbon cycle is a …
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Urbanization's Effects on Avian Morphology, Hormones, and Behavior Across Ontogeny
… continues to grow at an unprecedented rate, anthropogenic changes are rapidly altering the remaining natural areas of the world. Urban-related stressors, such as lower food availability, the urban heat island, artificial light at night, and other pollution directly impact urban wildlife …
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Analysis of seasonal variation in dietary composition and behaviour of wild chacma baboons (Papio ursinus) in two habitats of different human influence around windhoek, central Namibia
… However, the ever-increasing environmental and anthropogenic pressures on baboon populations are likely to affect both the diet composition and foraging behavior of these animals. Moreover, Namibia being one of the driest countries in the Sub Saharan Africa, and coupled with accelerated …
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Reconstructing late Holocene Artctic climate change using high resolution sediment records from Simpson Lagoon, Alaska and the Colville River alluvial valley
… late Holocene. The ongoing, rapid environmental changes recently observed in the Arctic highlight the need for high-resolution records of pre-industrial climate change in this climatically sensitive region; such records are fundamental for understanding recent anthropogenic changes in the context …
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Mitochondrial DNA analysis of the evolution and genetic diversity of ancient and extinct bears.
… impacts of the last glacial maximum (LGM) and anthropogenic disruption on late Pleistocene and Holocene ancestral populations. However, it is becoming more and more evident that ancient DNA studies greatly augment traditional mtDNA studies based only on extant lineages, and can reveal more …
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