Publication Abstracts

Tubiello et al. 1999

Tubiello, F.N., G. Lin, J.W. Druitt, and B.D.V. Marino, 1999: Ecosystem-level evapotranspiration and water-use efficiency in the desert biome of Biosphere 2. Ecol. Eng., 13, 263-271.

We estimate whole-system water and carbon fluxes for the desert biome of Biosphere 2 under two different daily-mean CO2 concentrations: 450 ppmv and 850 ppmv. The desert mesocosm occupies an area of approximately 1500 m2, has a total atmospheric volume of about 25000 m3 and a contains a heterogeneous distribution of plants and soils. Atmospheric water content and CO2 concentrations were measured continuously using a variety of sensors, including a Li-cor 6262 for CO2 deployed within the experimental area. Daily carbon and water budgets were calculated in the desert biome, isolated from the rest of Biosphere 2 by deploying isolation curtains for 24-h periods. Data collected for six closure periods suggest that elevated CO2 concentration increased whole-system carbon uptake, while evapotranspiration remained constant. As a result, whole-system water-use efficiency (WUE, defined as net ecosystem carbon uptake per unit water transpired) in the Biosphere 2 desert increased by more than 40%. Our measurements investigate soil-plant processes at a medium scale, ideally bridging the gap between traditional controlled-environment growth chambers and open-field studies.

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BibTeX Citation

@article{tu04000r,
  author={Tubiello, F. N. and Lin, G. and Druitt, J. W. and Marino, B. D. V.},
  title={Ecosystem-level evapotranspiration and water-use efficiency in the desert biome of Biosphere 2},
  year={1999},
  journal={Ecol. Eng.},
  volume={13},
  pages={263--271},
}

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RIS Citation

TY  - JOUR
ID  - tu04000r
AU  - Tubiello, F. N.
AU  - Lin, G.
AU  - Druitt, J. W.
AU  - Marino, B. D. V.
PY  - 1999
TI  - Ecosystem-level evapotranspiration and water-use efficiency in the desert biome of Biosphere 2
JA  - Ecol. Eng.
VL  - 13
SP  - 263
EP  - 271
ER  -

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