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 79 for “"carbon dynamics"”.
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THE CARBON DYNAMICS OF CONTRASTING FRESHWATER PONDS
Lake carbon-storage is an emerging climate and environmental research theme. Small lakes are increasingly recognised as receiving disproportionately high carbon-inputs potentially causing rapid carbon-emissions, making them atmospheric CO2 and/or CH4 sources. However, little research investigates …
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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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An Isotopic Analysis of Carbon Dynamics in Sphagnum Peat
Methane and carbon dioxide produced in peatlands can be held temporarily in dissolved surface waters and accessible to aquatic plants. The primary peat building plant in northern peatlands, Sphagnum moss, grows in these dissolved carbon rich waters. Understanding Sphagnum carbon cycles is key for …
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Organic carbon dynamics of the Neches River and its floodplain.
… has an extensive forested floodplain. Organic carbon was analyzed within the floodplain waters and the river (upstream and downstream of the floodplain) to determine the amount of organic carbon from the floodplain that is contributing to the nutrient dynamics in the river. Dissolved organic …
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Weathering below Irish blanket bogs and impacts on carbon dynamics
… in these catchments is consuming atmospheric carbon, in both the long and short term. Short term (<3ka) carbon consumption is comparable to values from Alpine catchments where weathering rates are high. In the long term (>3ka) carbon consumption is more limited due to the significance of …
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Linking Carbon Dynamics in Stream Ecosystems to Dissolved Organic Matter Quality
Stream ecosystems form an active component of the carbon (C) cycle, and are identified as “hotspots” for carbon dioxide (CO2) emissions. However, the mechanisms driving CO2 emissions from streams are not completely understood. Beside the input of C in the form of CO2 from groundwater, streams …
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Carbon dynamics of global land use, land-use change, and forestry
… Commission's declaration that bioenergy is carbon-neutral. Bioenergy advocates argue that the carbon released upon the combustion of harvested wood should eventually be reabsorbed from the atmosphere when the harvested land regrows. Recent studies, however, find that wood bioenergy can …
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Soil Carbon Dynamics in Lawns Converted From Appalachian Mixed Oak Stands
… to vegetation and soils, which may affect soil carbon storage. To better understand the effects of landscape conversion and management on soil carbon, we conducted a study on residential properties in the Valley and Ridge physiographic province of southwest Virginia to compare soil carbon …
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Experimental and Theoretical Study of Carbon Dynamics in an Algal-Bacterial Co-Culture
… our planet. Photosynthetic phytoplankton perform carbon fixation, converting carbon dioxide into organic molecules. Some of these organic molecules are released by the phytoplankton and can be subsequently metabolised by heterotrophic bacteria, therefore heterotrophic bacteria play an important …
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Quantification and Physiology of Carbon Dynamics in Intensively Managed Loblolly Pine (Pinus taeda L.)
… represents a critical component of the global carbon (C) cycle. Forest management alters C dynamics, affecting the C sequestration capacity of a site. Identifying drivers that influence C cycling, quantifying C fluxes, and determining how management alters processes involved in C cycling will …
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Carbon Dynamics in Extracted Minerotrophic Peatlands: An Analysis of the Effect of Plant Biodiversity
… 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 role of plant biodiversity. In a controlled field …
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Tracing Carbon Dynamics in the Southern Ocean and Great Barrier Reef Using Strontium and Calcium
This study examines carbon cycling in the Southern Ocean and the Great Barrier Reef using strontium (Sr) and calcium (Ca) tracers. Traditionally, major cations like Ca and Sr were considered to have constant concentrations due to their long residence times. However, recent studies reveal that when …
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Tracing Carbon Dynamics in the Southern Ocean and Great Barrier Reef Using Strontium and Calcium
This study examines carbon cycling in the Southern Ocean and the Great Barrier Reef using strontium (Sr) and calcium (Ca) tracers. Traditionally, major cations like Ca and Sr were considered to have constant concentrations due to their long residence times. However, recent studies reveal that when …
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Carbon dynamics under natural and manipulated meteorological boundary conditions in a forest and a fen ecosystem
… summer drought and soil frost on soil C dynamics 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 …
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Soil carbon dynamics in the upper Mersey estuarine floodplain, northwest England : implications for soil carbon sequestration
There have been several studies on soil carbon dynamics in estuarine floodplains. However, little attempt has been made to examine the effects of heavy metal contamination on these processes. This represents a knowledge gap that needs to be filled to understand better soil carbon decomposition in …
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The effects of scale and context-dependency on the outcome of experiments investigating soil carbon dynamics
Soil carbon dynamics and plant-soil interactions are an integral part of ecosystem function and understanding the effects of perturbations on these processes is vital if we are to predict the future of ecosystems under global environmental change. However, it is often challenging to study complex …
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Air-Sea CO2 Exchange and Carbon Dynamics in Foxe Basin: Findings from a 2023 Oceanographic Survey
… role in climate by removing large amounts of carbon dioxide (CO2) from the atmosphere through air-sea gas exchange. This process is particularly important in polar oceans, where sea-ice formation releases brine to the water column below and can create dense waters that sink and sequester …
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The Influence of Urban Soil Rehabilitation on Soil Carbon Dynamics, Greenhouse Gas Emission, and Stormwater Mitigation
… urban soils have potential to provide a carbon sink to mitigate greenhouse gas emission and climate change. However, typical urban land development practices including vegetation clearing, topsoil removal, stockpiling, compaction, grading and building result in degraded soils. In this …
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Quantifying terrestrial ecosystem carbon dynamics with mechanistically-based biogeochemistry models and in situ and remotely sensed data
… ecosystem plays a critical role in the global carbon cycle and climate system. Therefore, it is important to accurately quantify the carbon dynamics of terrestrial ecosystem under future climatic change condition. This dissertation evaluates the regional carbon dynamics by using upscaling …
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