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Effect Of Spring Burning On The Surface Energy Balance In A Tallgrass Prairie

by Fianna O'Brien - January 25, 2017

Spring burning of dead biomass in tallgrass prairie is a common practice that may influence heat and water vapor transport from the landscape. Bowen ratio methods were used to measure… More

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What Limits Evaporation From Mediterranean Oak Woodlands – The Supply Of Moisture In The Soil, Physiological Control By Plants Or The Demand By The Atmosphere?

by Fianna O'Brien - January 25, 2017

The prediction of evaporation from Mediterranean woodland ecosystems is complicated by an array of climate, soil and plant factors. To provide a mechanistic and process-oriented understanding, we evaluate theoretical and… More

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Photosynthetic Acclimation To Elevated Atmospheric CO2 Concentration In The Florida Scrub-Oak Species Quercus Geminata And Quercus Myrtifolia Growing In Their Native Environment

by Fianna O'Brien - January 25, 2017

Long-term effects of elevated CO2 concentration (ambient plus 350 μmol mol−1) on leaf photosynthetic acclimation of two species of a scrub-oak community, Quercus myrtifolia Willd. and Quercus geminata Small, were… More

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Increased CO2 Loss From Vegetated Drained Lake Tundra Ecosystems Due To Flooding

by Fianna O'Brien - January 25, 2017

Tundra ecosystems are especially sensitive to climate change, which is particularly rapid in high northern latitudes resulting in significant alterations in temperature and soil moisture. Numerous studies have demonstrated that… More

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Long-Term Variability In The Water Budget And Its Controls In An Oak-Dominated Temperate Forest

by Fianna O'Brien - January 25, 2017

Water availability is one of the key environmental factors that control ecosystem functions in temperate forests. Changing climate is likely to alter the ecohydrology and other ecosystem processes, which affect… More

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Modeling And Measuring The Effects Of Disturbance History And Climate On Carbon And Water Budgets In Evergreen Needleleaf Forests

by Fianna O'Brien - January 25, 2017

The effects of disturbance history, climate, and changes in atmospheric carbon dioxide (CO2) concentration and nitrogen deposition (Ndep) on carbon and water fluxes in seven North American evergreen forests are… More

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Potential Of MODIS Ocean Bands For Estimating CO2flux From Terrestrial Vegetation: A Novel Approach

by Fianna O'Brien - January 25, 2017

A physiologically-driven spectral index using two ocean-color bands of MODIS satellite sensor showed great potential to track seasonally changing photosynthetic light use efficiency (LUE) and stress-induced reduction in net primary… More

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Seasonal And Annual Respiration Of A Ponderosa Pine Ecosystem

by Fianna O'Brien - January 25, 2017

The net ecosystem exchange of CO2 between forests and the atmosphere, measured by eddy covariance, is the small difference between two large fluxes of photosynthesis and respiration. Chamber measurements of… More

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Landscape-Scale CO2 , H2O Vapour And Energy Flux Of Moist-Wet Coastal Tundra Ecosystems Over Two Growing Seasons

by Fianna O'Brien - January 25, 2017

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What The Towers Don'T See At Night: Nocturnal Sap Flow In Trees And Shrubs At Two Ameriflux Sites In California

by Fianna O'Brien - January 25, 2017

At the leaf scale, it is a long-held assumption that stomata close at night in the absence of light, causing transpiration to decrease to zero. Energy balance models and evapotranspiration… More

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