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 8 of 8 for “"carbon and nutrient cycling"”.
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Controls on terrestrial carbon and nutrient cycling in Arctic permafrost environments
… on the response of Arctic ecosystems to positive and negative feedbacks, which has implications for the global climate system and the people that inhabit the Arctic region. Improving our understanding of the biogeochemical cycles that influence Arctic terrestrial systems will help improve models …
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Soil Carbon and Nutrient Cycling Across Cover Types in Southern Appalachian Hardwood Forests
Appalachian mixed hardwood stands along south facing slopes of the Ridge and Valley physiographic province were used to determine fine scale soil respiration (Rs ) and nutrient dynamics among four distinct cover types, white oak (WO, Quercus alba L.), scarlet oak (SO, Quercus coccinea Muech.), …
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Effect of invasive phragmites australis and its control on microbial community composition in a freshwater wetland
<p>Wetlands support great species diversity and perform important ecosystem services like carbon and nutrient cycling, largely facilitated by microorganisms. Invasive plants, like Phragmites australis, reduce biodiversity and alter ecosystem services. I hypothesized that changes in soil bacterial …
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Expansion of Deltaproteobacteria diversity from marine sediment reveals unique metabolic features
… of bacteria that play a substantial role in carbon and nutrient cycling. However, our understanding of Deltaproteobacteria is biased towards cultured exemplars. To better understand the biodiversity and ecology of the Deltaproteobacteria, we obtained hundreds of unique, uncultured …
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Tree functional diversity affects litter decomposition and arthropod community composition in a tropical forest
… crucial role of tropical forests in the global carbon balance is determined by tree growth and the rapid turnover of organic material. Land-use change and forest recovery from disturbance alters species- and functional diversity, which in turn can modify decomposition processes and affect …
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The role of diatoms in the global carbon cycle
… interactions between planktonic organisms, ocean and atmosphere. The plankton is divided into five Plankton Functional Types (PFTs), each playing a specific role in carbon and nutrient cycling and in the trophic chain. The growth parameters for each PFT are now being derived in order to represent …
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Subarctic ecosystem responses to climate, catchment and permafrost dynamics in the Holocene
This thesis assesses aspects of the wetland development, permafrost dynamics and associated changes in carbon and nutrient cycling of the Stordalen Mire in northern Sweden. Various ecological and biogeochemical analyses of one peat and two lake sediment sequences were conducted, including analyses …
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Development of Ecosystem Structure and Function on Reforested Surface-Mined Lands
… in the central Appalachian coalfield disturbs landscapes. Post-mining reforestation efforts now achieve successful reestablishment and growth; however, it is unclear whether reforestation efforts also restore the native forest ecosystem functions. We quantified rates of return of key ecosystem …