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Diurnal And Seasonal Changes In Stem Increment And Water Use By Yellow Poplar Trees In Response To Environmental Stress

by Fianna O'Brien - January 30, 2017

To evaluate indicators of whole-tree physiological responses to climate stress, we determined seasonal, daily and diurnal patterns of growth and water use in 10 yellow poplar (Liriodendron tulipifera L.) trees… More

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Extreme Drought Effects On Carbon Dynamics Of A Semiarid Pasture

by Fianna O'Brien - January 30, 2017

Environmental and management factors are critical in determining the C source or sink status of agroecosystems. Information on the C dynamics of an ecosystem from source to sink and vice… More

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The Influence Of Light Environment On Photosynthesis And Basal Methylbutenol Emission From Pinus Ponderosa

by Fianna O'Brien - January 30, 2017

Methylbutenol is a 5-carbon alcohol that is produced and emitted by several species of pine in western North America, and may have important impacts on the tropospheric chemistry of this… More

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Effects Of Aggregated Classifications Of Forest Composition On Estimates Of Evapotranspiration In A Northern Wisconsin Forest

by Fianna O'Brien - January 30, 2017

Forest management presents challenges to accurate prediction of water and carbon exchange between the land surface and atmosphere, due to its alteration of forest structure and composition. We examined how… More

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Net Carbon Fluxes From Forest Clearance And Regrowth In The Amazon

by Fianna O'Brien - January 30, 2017

Estimates of net carbon exchange resulting from forest clearance and regrowth were made for three areas in the Brazilian and Bolivian Amazon. The study areas, ranging in size from 600… More

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Post-Fire Carbon Dioxide Fluxes In The Western Canadian Boreal Forest: Evidence From Towers, Aircraft And Remote Sensing

by Fianna O'Brien - January 30, 2017

Recent CO2 flux measurements from towers and aircraft (net ecosystem exchange by eddy covariance) and remote sensing/modeling (net primary productivity—NPP) following fire show that the regenerating boreal forest in western… More

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Quantifying Simultaneous Fluxes Of Ozone, Carbon Dioxide And Water Vapor Above A Subalpine Forest Ecosystem

by Fianna O'Brien - January 30, 2017

Assessing the long-term exchange of trace gases and energy between terrestrial ecosystems and the atmosphere is an important priority of the current climate change research. In this regard, it is… More

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A Six-Year Study Of Sapling And Large-Tree Growth And Mortality Responses To Natural And Induced Variability In Precipitation And Throughfall

by Fianna O'Brien - January 30, 2017

Global climatic change may cause changes in regional precipitation that have important implications for forest growth in the southern United States. In 1993, a stand-level experiment was initiated on Walker… More

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Sustained Carbon Uptake And Storage Following Moderate Disturbance In A Great Lakes Forest

by Fianna O'Brien - January 30, 2017

Carbon (C) uptake rates in many forests are sustained, or decline only briefly, following disturbances that partially defoliate the canopy. The mechanisms supporting such functional resistance to moderate forest disturbance… More

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Energy And Water Balance Of Two Contrasting Loblolly Pine Plantations On The Lower Coastal Plain Of North Carolina, USA

by Fianna O'Brien - January 30, 2017

During 2005–2007, we used the eddy covariance and associated hydrometric methods to construct energy and water budgets along a chronosequence of loblolly pine (Pinus taeda) plantations that included a mid-rotation… More

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