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 86 for “"peatlands"”.
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Greenhouse gas metabolizing prokaryotes in peatlands
Peatlands in the northern hemisphere store substantial amounts of carbon and nitrogen, and are predicted to react sensitively to global warming. The main objective of the study was to study microbial processes involved in the fluxes of the greenhouse gases methane (CH4) and nitrous oxide (N2O) from …
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Carbon dynamics in restiad peatlands across different timescales
Peatlands contain one of the largest terrestrial carbon stores on the planet, and one which is known to interact with climate and global biogeochemical cycling of nutrients. Peatlands maintain their carbon primarily through a high and stable water table which restricts decomposition, and large …
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HOLOCENE PALAEOCLIMATE RECONSTRUCTION FROM N EW ZEALAND PEATLANDS
A selection of palaeoecological proxies were tested on two raised, ombrotrophic, restiad peat bog sites from the North Island of New Zealand. With varying degrees of success, peat humification, testate amoebae, plant macrofossil and charcoal analyses contributed to determining the palaeomoisture …
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Carbon fluxes from tropical peatlands : methane, carbon dioxide, and peatland subsidence
Tropical peatlands in Southeast Asia have sequestered carbon over thousands of years and are an important global carbon stock. In natural peat swamp forests, high water levels inhibit decomposition due to anoxic conditions. However, they are being rapidly deforested and drained, releasing stored …
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Robustness and precision of Holocene palaeoclimatic records from peatlands using testate amoebae
… designed for application on oligotrophic peatlands. The transfer function was found to provide more precise reconstructions for depth to water table than percentage soil moisture. Multiple cores were extracted from three of the Border Mires; Coom Rigg Moss and Butterburn Flow (both …
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Holocene palaeohydrology from testate amoebae analysis: developing a model for British peatlands
… Rhizopoda) are particularly abundant in peatlands. Previous studies have used testate amoebae in palaeoenvironmental studies, but have used qualitative data only, so that results are expressed only in terms of 'wet', 'dry' or 'moist'. This study uses testate amoebae to derive quantitative …
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Keeping above the waves? The response of coastal freshwater peatlands to sea-level rise
… of SLR on coastal freshwater systems such as peatlands. Peatlands are significant ecosystem service providers: storing carbon, attenuating floods, improving water quality, and enhancing biodiversity. This thesis aims to improve our understanding of peatland responses to SLR. Adopting a …
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Land-cover change within the peatlands along the Rocky Mountain Front, Montana: 1937-2009
Aerial photographs of nine peatlands along the Rocky Mountain Front, Montana, were analyzed in a GIS. The boundary of wetland extent was hand-digitized and the area within was classified into land-cover types including: total area, open fen, open water, woody vegetation, and …
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Land-cover change within the peatlands along the Rocky Mountain Front, Montana: 1937-2009
Aerial photographs of nine peatlands along the Rocky Mountain Front, Montana, were analyzed in a GIS. The boundary of wetland extent was hand-digitized and the area within was classified into land-cover types including: total area, open fen, open water, woody vegetation, and …
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Carbon Dynamics in Extracted Minerotrophic Peatlands: An Analysis of the Effect of Plant Biodiversity
… to alter the diversity of vegetation and convert peatlands from net sinks to persistent sources of carbon to the atmosphere. Peatland restoration has been shown to re‐establish the natural carbon sink function, however, current restoration techniques could be refined with more knowledge of the …
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The effects of bog restoration in formerly afforested peatlands on water quality and aquatic carbon fluxes
… and carbon sequestration services provided by peatlands. Forest-to-bog restoration involves conifer felling (and harvesting) along with blocking of forestry drains. Research from conifer felling and drain blocking on open peatlands shows significant effects on pore- and stream- water quality, …
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The changing face of Andean peatlands: the effects of climate and human disturbance on ecosystem structure and function
Peatlands store nearly one third of the soil global carbon, and approximately 10% of the world's drinkable water on only 3% of the land surface. Peatlands store large amounts of carbon from the organic matter due to the reduced decomposition rates in the soil allowing the accumulation of new plant …
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