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 44 for “"carbon uptake"”.
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Understanding Carbon Uptake Using Multi-Scale Novel Remote Sensing Techniques
… as a priority research frontier because dryland carbon dynamics have been identified as disproportionately important in regulating interannual variability of atmospheric CO2 concentrations. Remote sensing can be used to monitor multiple aspects of vegetation dynamics as well as its sensitivity to …
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Impact of Air Quality on Lichen Net Carbon Uptake and Structural Organization With Attention to the Role of Photoinhibition
… low-level air pollution impacts on net carbon uptake, pigmentation and structure using intermediate tolerant species, Parmelia sulcata and Platismatia glauca, from two different polluted field sites using air pollution data. To access light sensitivity, the same lichen species were used …
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The Importance of Fog for Carbon Gain, Water Balance, and Foliar Uptake in Southern Appalachian Cloud Forests
… leaf wetting events can negatively affect carbon uptake by blocking stomatal pores, inhibiting CO2 exchange. Thus, in the southern Appalachian cloud forest ecosystem, the effects of cloud immersion on whole plant physiological ecology, including carbon uptake and water balance needed to be …
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Estimates of global sources and sinks of carbon from land cover and land use changes
The distribution of sources and sinks of carbon over the land surface is dominated by changes in land use such as deforestation, reforestation, and agricultural management. Despite, the importance of land-use change in dominating long-term net terrestrial fluxes of carbon, estimates of the annual …
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Interannual Differences in Nutrient Dynamics During a Brown Tide Bloom (<i>Aureococcus anophagefferens</i>) and the Interaction of <i>A. anophagefferens</i> with Heterotrophic Bacteria
… which interannual differences in nitrogen and carbon uptake and concentrations of dissolved constituents were compared at two sites, one in Maryland and the other in Virginia. Overall, I observed an increase in bloom intensity and duration over time. No single nitrogen compound was responsible …
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Optimality and resilience in patterns of carbon allocation and growth in vegetation under acclimation response to climate change
… atmospheric concentration of the greenhouse gas carbon dioxide was 280 ppm, it is currently at 400 ppm and is expected to reach 550 ppm by 2050. Under such a changing environmental condition plants undergo acclimation, by which they adjust to the altered environment and in doing so enhance their …
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Nutrient and Carbon Dynamics in the Chesapeake Bay Outflow Plume and Their Effect on the Coastal Ocean Environment
<p>Seasonally resolved nutrient and carbon fluxes from estuaries to the coastal ocean are poorly constrained. Nutrient and carbon cycling in highly productive regions like the Chesapeake Bay outflow plume and surrounding coastal environments greatly affect our global understanding of carbon …
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Soil-Plant-Atmosphere Coupling during Interstorm Periods
The future trajectory of net terrestrial carbon uptake and agricultural yields are dependent on how vegetation responds to climate forcings. However, characterizing vegetation responses to water stress and other environmental drivers is challenging because these forcing factors are inter-related, …
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Enhancing photosynthetic capacity and energy conversion in wheat
… of fertilizer or water. The canopy light-driven carbon uptake through photosynthesis is the primary determinant of plant biomass and yield. In this context, it is crucial to understand crop physiology and plant behaviour, with a focus on carbon balance, in contrasting environments, as well as to …
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Novel water-use strategies of Colorado wetland plants: implications for wetland water loss
… which suggests that wetland plants prioritize carbon uptake over hydraulic safety and do not align with current paradigms for stomatal responses to vapor pressure deficit, leaf water potential, or turgor loss point. Understanding species' stomatal responses to extreme environmental conditions …
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The effects of low-level pharmaceuticals on stream biofilm structure and function across a land-use gradient in streams of the Huron River watershed
… and bacterial community composition. Bacterial carbon uptake was reduced (p = 0.06) and we found shifts in biofilm community composition following treatments. However, maximum photosynthetic efficiency, decomposition, and microbial physiological profiles showed no significant effect of PPCPs. …
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The Assimilation of Glucose by Phytoplankton: A Potentially Common Adaptation Under Multiple Irradiance and Field Conditions
… phytoplankton is their ability to fix inorganic carbon via photosynthesis. However, photosynthesis can be paired with organic carbon uptake in many phytoplankton species under varying conditions. Mixotrophy is assumed to be a competitive advantage, especially in environments where inorganic …
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Monitoring Anthropogenic Carbon in Cape Cod Bay
… to human activity, coastal ecosystems, and carbon uptake. Parameters such as pH on the total scale (pHₜ), Dissolved Inorganic Carbon (DIC), and Total Alkalinity (TA) contribute to understanding the health of coastal waters such as Cape Cod Bay, yet are resource-intensive to measure and have …
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The effects of elevated CO2 and ocean acidification on the production of marine biogenic trace gases
The human-induced increases in atmospheric carbon dioxide since the beginning of the industrial revolution have led to increasing oceanic carbon uptake and changes in seawater carbonate chemistry, resulting in lowering of surface water pH. To date, surface ocean acidity has increased by 30% …
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Modeling Neotropical Ecosystems during the Last Glacial Maximum
… on discerning the effects of low atmospheric carbon dioxide and temperature on the carbon exchange of a well-watered tropical forest using a canopy-scale ecophysiological model. The radiative transfer regime and canopy energy balance were used to interpret the effect of environmental variables …
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On the role of the Southern Ocean in the global carbon cycle and atmospheric CO2 change
… plays an important role in the global carbon cycle because altered communication between the atmosphere and abyss in the Southern Ocean is relatively well documented and often implicated in explanations of past and future climate changes, but the ambiguity of the paleoceanographic …
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EVALUATING THE PERFORMANCE OF BIOMETRIC APPROACHES FOR VERIFICATION AND MONITORING IN COMMERCIAL FOREST CARBON ACCOUNTING
Of the strategies to increase land carbon storage and avoid GHG emissions through natural ecosystem management, Forest-based Climate Solutions (FbCS) are believed to offer the greatest mitigation potential. As more funds are allocated towards FbCS deployment, questions arise regarding their actual …
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Effect of future CO2 and temperature regimes on phytoplankton community composition, biomass and photosynthetic rates in the western English Channel
… of up to 14-fold. Light-saturated photosynthetic carbon fixation rates increased > 6-fold under elevated pCO2 while an increase of up to 3-fold resulted from elevated temperature. The combined effects of elevated pCO2 and temperature reduced biomass in late summer and had no effects on biomass in …
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Tree Growth and Carbon Balance in a Temperate Forest Exposed to Elevated Carbon Dioxide for Eight Years
… atmosphere have focused attention on the global carbon cycle. Increases in atmospheric CO2 concentrations strongly influence plant carbon uptake and because forests account for the bulk of terrestrial productivity the future role of forests in the carbon cycle is a subject of current scientific …
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The impact of increased grid resolution on the mixed layer depth variability in the South Atlantic Ocean and Southern Ocean
… allows for a better understanding of the carbon cycle and possible future climate conditions. Earth System Models are used to study Southern Ocean dynamics and are currently producing reliable global annual carbon uptake but have limiting seasonal abilities. These models produce dependable …
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