Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 6 December 2002:
Vol. 298. no. 5600, pp. 1987 - 1990
DOI: 10.1126/science.1075312
Prev | Table of Contents | Next

Reports

Grassland Responses to Global Environmental Changes Suppressed by Elevated CO2

M. Rebecca Shaw,1*dagger Erika S. Zavaleta,12ddagger Nona R. Chiariello,3 Elsa E. Cleland,12 Harold A. Mooney,2 Christopher B. Field1

Simulated global changes, including warming, increased precipitation, and nitrogen deposition, alone and in concert, increased net primary production (NPP) in the third year of ecosystem-scale manipulations in a California annual grassland. Elevated carbon dioxide also increased NPP, but only as a single-factor treatment. Across all multifactor manipulations, elevated carbon dioxide suppressed root allocation, decreasing the positive effects of increased temperature, precipitation, and nitrogen deposition on NPP. The NPP responses to interacting global changes differed greatly from simple combinations of single-factor responses. These findings indicate the importance of a multifactor experimental approach to understanding ecosystem responses to global change.

1 Department of Global Ecology, Carnegie Institution of Washington, 260 Panama Street, Stanford, CA 94305, USA.
2 Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA.
3 Jasper Ridge Biological Preserve, Stanford University, Stanford, CA 94305, USA.
*   To whom correspondence should be addressed. E-mail: shaw{at}globalecology.stanford.edu

dagger    Present address: The Nature Conservancy of California, 201 Mission Street, 4th floor, San Francisco, CA 94105-1832, USA.

ddagger    Present address: The Nature Conservancy of California and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA.

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Responses of an old-field plant community to interacting factors of elevated [CO2], warming, and soil moisture.
E. C. Engel, J. F. Weltzin, R. J. Norby, and A. T. Classen (2009)
J Plant Ecol 2, 1-11
   Abstract »    Full Text »    PDF »
Climate Change and Food Security Special Feature: Crop and pasture response to climate change.
F. N. Tubiello, J.-F. Soussana, and S. M. Howden (2007)
PNAS 104, 19686-19690
   Abstract »    Full Text »    PDF »
Response of Nitrosospira sp. Strain AF-Like Ammonia Oxidizers to Changes in Temperature, Soil Moisture Content, and Fertilizer Concentration.
S. Avrahami and B. J. M. Bohannan (2007)
Appl. Envir. Microbiol. 73, 1166-1173
   Abstract »    Full Text »    PDF »
Diverse responses of phenology to global changes in a grassland ecosystem.
E. E. Cleland, N. R. Chiariello, S. R. Loarie, H. A. Mooney, and C. B. Field (2006)
PNAS 103, 13740-13744
   Abstract »    Full Text »    PDF »
Food for thought: lower-than-expected crop yield stimulation with rising CO2 concentrations..
S. P. Long, E. A. Ainsworth, A. D. B. Leakey, J. Nosberger, and D. R. Ort (2006)
Science 312, 1918-1921
   Abstract »    Full Text »    PDF »
Methane-Oxidizing Bacteria in a California Upland Grassland Soil: Diversity and Response to Simulated Global Change.
H.-P. Horz, V. Rich, S. Avrahami, and B. J. M. Bohannan (2005)
Appl. Envir. Microbiol. 71, 2642-2652
   Abstract »    Full Text »    PDF »
Ammonia-oxidizing bacteria respond to multifactorial global change.
H.-P. Horz, A. Barbrook, C. B. Field, and B. J. M. Bohannan (2004)
PNAS 101, 15136-15141
   Abstract »    Full Text »    PDF »
Nitrate assimilation in plant shoots depends on photorespiration.
S. Rachmilevitch, A. B. Cousins, and A. J. Bloom (2004)
PNAS 101, 11506-11510
   Abstract »    Full Text »    PDF »
Species and functional group diversity independently influence biomass accumulation and its response to CO2 and N.
P. B. Reich, D. Tilman, S. Naeem, D. S. Ellsworth, J. Knops, J. Craine, D. Wedin, and J. Trost (2004)
PNAS 101, 10101-10106
   Abstract »    Full Text »    PDF »
Could CO2-induced land-cover feedbacks alter near-shore upwelling regimes?.
N. S. Diffenbaugh, M. A. Snyder, and L. C. Sloan (2004)
PNAS 101, 27-32
   Abstract »    Full Text »    PDF »
Additive effects of simulated climate changes, elevated CO2, and nitrogen deposition on grassland diversity.
E. S. Zavaleta, M. R. Shaw, N. R. Chiariello, H. A. Mooney, and C. B. Field (2003)
PNAS 100, 7650-7654
   Abstract »    Full Text »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)