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 13 of 13 for “"C mineralization"”.
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Carbon and nitrogen mineralization in temperate forest soils at low temperatures
In the past, carbon (C) and nitrogen (N) mineralization in temperate forest soils was often considered negligible at low temperatures during the dormant season, which is questioned by recent findings. Climate models predict warmer winters but little is known about the temperature sensitivity of C …
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Soil Structure and Organic Matter Dynamics: Influence of Tillage and Soil Physical Properties
… the influence of soil structure on SOC mineralization and SOC fraction dynamics. A laboratory incubation was conducted using two soils with different levels of organic matter collected in Urbana, IL, (OM-HIGH and OM-LOW). A series of field studies were conducted using a pair of tillage …
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The drivers of freshwater reservoir biogeochemical cycling and greenhouse gas emissions in a changing world
… the rate and end products of organic C mineralization, which include two greenhouse gases, carbon dioxide (CO2) and methane (CH4). I performed ecosystem-level DO manipulations and evaluated how changing DO conditions affected redox reactions and the production and emission of CO2 and …
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Nitrogen biogeochemistry in Binghamton, NY, a medium-sized urban ecosystem
… soils. However, NaCl negatively impacted C mineralization and soil respiration in situ. In a final experiment, we found that the microbial community of urban stream sediment had the capacity to substantially reduce NO3- through denitrification.</p>
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Effects of different canopy tree species on belowground biogeochemistry in a wet lowland tropical forest
… between litter chemistry and cumulative C mineralization and inorganic N availability, but litter chemistry did not affect soil labile P pools or Ptase activity. Overall, my results suggest the importance of aboveground plant community composition in promoting belowground biogeochemical …
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Effects of different canopy tree species on belowground biogeochemistry in a wet lowland tropical forest
… between litter chemistry and cumulative C mineralization and inorganic N availability, but litter chemistry did not affect soil labile P pools or Ptase activity. Overall, my results suggest the importance of aboveground plant community composition in promoting belowground biogeochemical …
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Plant species effects on soil organic matter turnover and nutrient release in forests and grasslands
… pools, and ecosystem processes such as net N mineralization. My objective was to examine two possible effects of species on soil C and N dynamics; changes in organic matter quality and changes in soil aggregation. For several forest ecosystems, litter lignin:N ratio correlated negatively …
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Effects of land management and climate change on soil microbial communities in Appalachian forest ecosystems
… that key soil biogeochemical processes, i.e., C mineralization, N mineralization, and nitrification, exhibit generally higher rates in historically disturbed forests relative to adjacent reference forests. Further, I attributed these changes in ecosystem process rates to changes in key aspects of …
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Aluminium stabilizes dissolved organic matter by precipitation
It is well known that carbon mineralization in acidic forest soils can be reduced by large Al concentrations. Precipitation of dissolved organic matter (DOM) by dissolved Al could contribute substantially to C retention in acidic forest soils. However, no information is available on the properties …
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Carbon dynamics under natural and manipulated meteorological boundary conditions in a forest and a fen ecosystem
… evidence for this assumption was found. Soil C mineralization rates were reduced during drought and recovery was slow, possibly delayed by water repellency and preferential flow. At the fen site we used two approaches: (i) Experimental lowering of water tables to measure resulting C fluxes in …
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Decomposition of Crop Residues
… C under an aerobic incubation. Initially net mineralization of residue N was more rapid in the waterlogged treatment. In the long term, the net mineralization results were similar to those where residues were incorporated and incubated aerobically. Changes in microbial biomass during maize …
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Gross N turnover and soil solution chemistry as influenced by fluctuations of soil water potential and water table in a Podzol and a fen soil
… fen, we studied the response of N and C mineralization and soil solution chemistry to water table fluctuations in a laboratory experiment. In the field, we collected the soil pore water in 3 depths to clarify the long-term effects of water table level on the concentrations of solutes. …
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Understanding the impact of residue and nitrogen inputs on soil carbon and nitrogen dynamics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01