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Start Over Author "Vourlitis, George L." Journal ecological applications
10 results on '"Vourlitis, George L."'

5. PHYSIOLOGICAL MODELS FOR SCALING PLOT MEASUREMENTS OF [CO.sub.2] FLUX ACROSS AN ARCTIC TUNDRA LANDSCAPE

Author

VOURLITIS, GEORGE L., OECHEL, WALTER C., HOPE, ALLEN, STOW, DOUG, BOYNTON, BILL, VERFAILLIE, JOSEPH JR., ZULUETA, ROMMEL, and HASTINGS, STEVEN J.

Subjects
Biotic communities -- Analysis -- Research, Arctic research -- Analysis -- Research, Ecological research -- Analysis -- Research, Hydrology -- Analysis -- Research, Carbon dioxide -- Research -- Analysis, Biological sciences, Environmental issues, Analysis, Research
Abstract

Abstract. Regional estimates of arctic ecosystem [CO.sub.2] exchange are required because of the large soil carbon stocks located in arctic regions, the potentially large global-scale feedbacks associated with climate-change-induced alterations [...]

Published
2000

9. EFFECTS OF METEOROLOGICAL VARIATIONS ON THE CO2 EXCHANGE OF A BRAZILIAN TRANSITIONAL TROPICAL FOREST.

Author

Vourlitis, George L., Priante Filho, Nicolau, Hayashi, Mauro M. S., Nogueira, José de S., Raiter, Fernando, Hoegel, Wander, and Campelo, Jr, José Holanda

Subjects
ECOTONES, RAIN forests, RAINFALL, CARBON cycle, CARBON fixation
Abstract

The article presents a study which quantifies the net ecosystem carbon dioxide exchange (NEE) of a 28-30 meters tall transitional tropical forest of the Brazilian Amazon using tower-based eddy covariance. The use of nonlinear statistical models to evaluate daily variations in ecophysiological parameters and offer annual estimates of NEE, gross ecosystem carbon dioxide exchange , and respiration is stated. It is inferred that variations in soil water content impacts canopy photosynthesis.

Published
2004
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10. PHYSIOLOGICAL MODELS FOR SCALING PLOT MEASUREMENTS OF CO2 FLUX ACROSS AN ARCTIC TUNDRA LANDSCAPE.

Author

Vourlitis, George L., Oechel, Walter C., Hope, Allen, Stow, Doug, Boynton, Bill, Verfaillie, Joseph, Zulueta, Rommel, and Hastings, Steven J.

Subjects
ECOSYSTEMS, CARBON in soils, ATMOSPHERIC temperature, CLIMATE change, RESPIRATION
Abstract

The article focuses on a study related to physiological models for the measurement of carbon dioxide flux in arctic Tundra Landscape. Topics discussed include requirement of arctic ecosystem carbon dioxide in exchange soil carbon, impact of climatic changes on arctic ecosystem, and use of gross primary production (GPP), whole-ecosystem respiration (R) and air temperature for photosynthetic photon flux density.

Published
2000
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