R
Ram Oren
Researcher at Duke University
Publications - 246
Citations - 28656
Ram Oren is an academic researcher from Duke University. The author has contributed to research in topics: Transpiration & Canopy. The author has an hindex of 91, co-authored 241 publications receiving 26280 citations. Previous affiliations of Ram Oren include Jet Propulsion Laboratory & Xishuangbanna Tropical Botanical Garden.
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Journal ArticleDOI
Progressive Nitrogen Limitation of Ecosystem Responses to Rising Atmospheric Carbon Dioxide
Yiqi Luo,Bo Su,William S. Currie,Jeffrey S. Dukes,Adrien C. Finzi,Ueli A. Hartwig,Bruce A. Hungate,Ross E. McMurtrie,Ram Oren,William J. Parton,Diane E. Pataki,Rebecca M. Shaw,Donald R. Zak,Christopher B. Field +13 more
TL;DR: In this paper, the authors proposed a new framework that centers on the concept of progressive N limitation (PNL) for studying the interactions between C and N in terrestrial ecosystems, and examined conditions under which PNL may or may not constrain net primary production and carbon sequestration in terrestrial ecosystem.
Journal ArticleDOI
Soil fertility limits carbon sequestration by forest ecosystems in a CO 2 -enriched atmosphere
Ram Oren,David S. Ellsworth,David S. Ellsworth,Kurt H. Johnsen,Nathan C. Phillips,Brent E. Ewers,Chris A. Maier,Karina V. R. Schäfer,Heather R. McCarthy,George R. Hendrey,Steven G. McNulty,Gabriel G. Katul +11 more
TL;DR: Evidence is presented that estimates of increases in carbon sequestration of forests, which is expected to partially compensate for increasing CO2 in the atmosphere, are unduly optimistic and that fertility can restrain the response of woodcarbon sequestration to increased atmospheric CO2.
Journal ArticleDOI
Survey and synthesis of intra- and interspecific variation in stomatal sensitivity to vapour pressure deficit
Ram Oren,John S. Sperry,Gabriel G. Katul,Diane E. Pataki,Brent E. Ewers,Nathan Phillips,Karina V. R. Schäfer +6 more
TL;DR: In this paper, the authors analyzed data from a variety of sources employing both porometric and sap flux estimates of stomatal conductance (gs) to evaluate the hypothesis that stomata sensitivity is proportional to the magnitude of gs at low D (£ 1k Pa).
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Forest response to elevated CO2 is conserved across a broad range of productivity.
Richard J. Norby,Evan H. DeLucia,Birgit Gielen,Carlo Calfapietra,Christian P. Giardina,John S. King,Joanne Ledford,Heather R. McCarthy,David J. P. Moore,Reinhart Ceulemans,Paolo De Angelis,Adrien C. Finzi,David F. Karnosky,Mark E. Kubiske,Martin Lukac,Kurt S. Pregitzer,Giuseppe Scarascia-Mugnozza,William H. Schlesinger,Ram Oren +18 more
TL;DR: The surprising consistency of response across diverse sites provides a benchmark to evaluate predictions of ecosystem and global models and allows us to focus on unresolved questions about carbon partitioning and retention, and spatial variation in NPP response caused by availability of other growth limiting resources.
Journal ArticleDOI
Water deficits and hydraulic limits to leaf water supply.
TL;DR: The hydraulic approach can improve the understanding of the coupling of canopy processes to soil environment, and the adaptive significance of stomatal behaviour, and allow the prediction of water use as a function of soil environment and plant architectural and xylem traits.