The use of stable isotopes to study ecosystem gas exchange
- D. Yakir, L. Sternberg
- Environmental ScienceOecologia
- 1 May 2000
This review introduces and discusses the relevant details underlying the use of carbon and oxygen isotopic compositions in ecosystem gas exchange research and the current use and potential developments of stable isotope measurements together with concentration and flux measurements of CO2 and water vapor.
The effects of partial throughfall exclusion on canopy processes, aboveground production, and biogeochemistry of an Amazon forest
- D. Nepstad, P. Moutinho, K. Schwalbe
- Environmental Science
- 27 October 2002
(1) Moist tropical forests in Amazonia and elsewhere are subjected to increasingly severe drought episodes through the El Nino-Southern Oscillation (ENSO) and possibly through deforestation-driven…
Oxygen Isotope Exchange between Metabolites and Water during Biochemical Reactions Leading to Cellulose Synthesis.
- L. Sternberg, M. J. Deniro, R. Savidge
- BiologyPlant Physiology
- 1 October 1986
The hypothesis that oxygen isotope ratios of plant cellulose are determined by isotopic exchange occurring during hydration of carbonyl groups of the intermediates of cellulose synthesis is supported.
Dynamic changes in hydraulic conductivity in petioles of two savanna tree species: factors and mechanisms contributing to the refilling of embolized vessels
- S. Bucci, F. Scholz, G. Goldstein, F. Meinzer, L. Sternberg
- Environmental Science
- 1 October 2003
Evidence is presented that embolism formation and repair are two distinct phenomena controlled by different variables, and the rate of refilling a function of internal pressure imbalances.
Contribution of transpiration to forest ambient vapour based on isotopic measurements
- M. Moreira, L. Sternberg, D. Nepstad
- Environmental Science
- 1 October 1997
Using a simple isotope mixing model, we evaluated the relative proportion of water vapour generated by plant transpiration and by soil evaporation at two sites in the Amazon basin. Sampling was…
Testing plant use of mobile vs immobile soil water sources using stable isotope experiments.
- A. I. Vargas, B. Schaffer, L. Yuhong, L. Sternberg
- Environmental ScienceNew Phytologist
- 30 May 2017
The present experiment shows that the assumptions for the 'two water worlds' hypothesis are not supported, and a novel explanation for the discrepancy between isotope ratios of the soil water profile and other water compartments in the hydrological cycle is proposed.
Seasonal changes in the diets of migrant and non-migrant nectarivorous bats as revealed by carbon stable isotope analysis
- T. Fleming, R. A. Núñez, L. Sternberg
- Environmental ScienceOecologia
- 1 May 1993
Phenological data suggest that certain species of columnar cacti and at least one group of paniculate Agaves on the Mexican mainland provide a spatio-temporally predictable nectar corridor along which nectarivorous bats may migrate in the spring and fall, respectively.
Savanna–forest hysteresis in the tropics
- L. Sternberg
- Environmental Science
- 1 July 2001
A simple dynamic model relating forest area in a region, its contribution to dry season precipitation and the effect on its own establishment was developed. The model equation shows hysteresis…
Variation in oxygen isotope fractionation during cellulose synthesis: intramolecular and biosynthetic effects.
- L. Sternberg, M. C. Pinzón, W. Anderson, A. Jahren
- Environmental SciencePlant, Cell and Environment
- 1 October 2006
These findings may explain the species-dependent variability in the overall oxygen isotope fractionation during cellulose synthesis, and may provide much-needed insight for palaeoclimate reconstruction using fossil cellulose.
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