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 139 for “"fen"”.
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Mapping shrub biomass in a boreal continental fen
Biomass estimation is a heavily explored topic in the literature, as biomass information can provide valuable insight into understanding an ecosystem’s health. However, few studies exist on quantifying aboveground biomass (AGB) in peatlands. This thesis summarizes how allometric equations and …
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Hydrologic behaviour and hydraulic properties of a patterned fen in Saskatchewan
A patterned, partially-treed, fen in the mid-boreal region of central Saskatchewan was the site of renewed hydrological research from 2002 to 2004. Hydraulic conductivity, transmissivity, and storativity were determined through use of a surface loading test, pumping tests, and an enclosed field …
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Carbon dynamics under natural and manipulated meteorological boundary conditions in a forest and a fen ecosystem
… in a Norway spruce forest. In a minerotrophic fen located nearby, the effect of water table lowering (as a result of summer drought) on ecosystem C dynamics was quantified. Additionally, soil C dynamics at both sites were modeled under current meteorological conditions. For the Norway spruce …
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Ecological Drivers of Plant Community Composition in a Patterned Fen at Seney National Wildlife Refuge, Michigan
… variation in geomorphology, vegetation, fen landforms, and water chemistry create a variety of unique peatlands across the Northern Hemisphere. In the Great Lakes region, patterned fens have been extensively studied in northern Minnesota, but largely ignored in Michigan. The purpose of …
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Effect of cutting as a fen management practice on the invertebrate biodiversity of the Norfolk Broads
… sought to discover whether summer cutting of fenlands changes the biodiversity of invertebrates in managed areas as compared to control areas. Following preliminary sampling reedbeds were chosen for the investigation. The invertebrates studied were Mollusca, Araneae and Coleoptera. Species …
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Non-growing season CO2 fluxes of a boreal fen – key drivers and responses to anomalous winter conditions
… and meteorological variables at Siikaneva fen in Southern Finland. Generally, the fen acted as a sink of CO2 with a mean annual carbon balance of -50.9 (± 39.4) g C m-2 . On average, the CO2 emissions during non-growing seasons offset 57% of the following growing seasons CO2 uptake. Two …
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Impact of extreme hydrological conditions on belowground carbon cycling and redox dynamics in peat soils from a northern temperate fen
… to general knowledge by providing raw data in fen peats under fluctuating and contrasting water table conditions in a relatively high spatiotemporal resolved scale. Dryings led to increased air filled porosity, O2 intrusion, CO2 degassing, inhibition of methanogenesis and renewal of electron …
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Post-Glacial Fire History of Horsetail Fen and Human-Environment Interactions in the Teanaway Area of the Eastern Cascades, Washington
… fire history of a wetland known as Horsetail Fen, located in the Teanaway area of the eastern Cascades of Washington State. The goal was to evaluate how fire activity has varied under different climatic scenarios during the last ~16,000 years and in relation to human land-use actions. This …
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Dynamics of soil processes under extreme meteorological boundary conditions - response of below-ground carbon, sulfur, and iron cycling in fen soils
… during drought are still not yet understood. Fens were also identified to be notable sources or sinks for arsenic. The close association of arsenic with the iron- and sulphur-dynamics – and thus redox dynamics during fluctuations of the water table level in general – is already known. …
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Phenology Effects on Carbon and Water Dynamics in a Pristine Boreal Fen A multi-decadal analysis from 2005-2007 & 2014-2022
… at the ecosystem level, in Siikaneva fen, Finland (2005-2007, 2014-2022). Interactions with temperature (T), vapor pressure deficit (VPD), photosynthetically active radiation (PAR) and rain were included and tested with various statistical methods (trend- and correlation-analysis, …
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ASSESSING THE ROLE OF GEOLOGIC SETTING ON THE HYDROLOGY AND GROUND WATER GEOCHEMISTRY OF FENS IN THE GLACIATED MIDWESTERN UNITED STATES
… THE HYDROLOGY AND GROUND WATER GEOCHEMISTRY OF FENS IN THE GLACIATED MIDWESTERN UNITED STATES A water quality investigation of several fens located in the temperate glaciated Midwestern United States, near the southern limit of fen occurrence, was conducted to assess the role of geologic setting …
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The Role of Temperature in the Seed Germination Ecology of Mountain Springs and Fens
Mountain calcareous spring fens are floristically diverse wetlands fed by carbonate-rich groundwater. This thesis studies their seed ecology, focusing on the interaction between environmental temperature and germination. To this end we conduct laboratory germination experiments with calcareous …
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Synthesis and characterisation of new multi-component compounds containing the non-steroidal anti-inflammatory drugs fenbufen and S(+)-ibuprofen
Fenbufen and S-(+)-ibuprofen are non-steroidal anti-inflammatory drugs with poor aqueous solubility. In attempts to improve their solubility and bioavailability, crystal engineering techniques were employed to synthesise salts, co-crystals and cyclodextrin inclusion complexes containing these …
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Molecular simulation of nucleation from flowing polymer melts
… known as flow-enhanced nucleation (FEN), is challenging to study experimentally due to the small spatiotemporal scale over which it occurs Non-equilibrium molecular dynamics (NEMD) simulation, which operates at short time and length scales, has proven to be a useful tool for …
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The Response of High Elevation Wetlands to Past Climate Change, and Implications for the Future
… of the ongoing investigation of mid-latitude fens in Colorado by University of Denver paleoenvironment researchers, research directed at examining the response of mid-latitude subalpine fens to past climatic events potentially analogous to modern anthropogenic climate change was undertaken. As …
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