The response of plants to elevated CO2 (original) (raw)
Summary
Communities, consisting of six co-occurring, disturbed site annuals, were subjected to CO2 unenriched (300 ppm) and to CO2 enriched (450 and 600 ppm) atmospheres at different levels of light and nutrient availability. In general, total community production increased with CO2 enrichment to 450 ppm, but a further increase in CO2 to 600 ppm had little or no effect. The response of community production to CO2 level was not affected by nutrient availability but was affected by light level.
Of the six species, four display C3 metabolism. The proportion of total community production contributed by these species increased as a result of CO2 enrichment, and was dependent upon both light and nutrient availability. The relative success of some species, particularly in terms of reproduction (total seed biomass), was significantly altered by CO2 concentration depending on the level of nutrients. There were not only changes in reproductive success (seed biomass) and shoot biomass but also changes in the proportion of biomass allocated to seed.
These experiments demonstrate that CO2 enrichment does affect annual plant communities both in terms of productivity and species composition and that the affect of CO2 on such system may depend upon other resources such as light and nutrients.
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Authors and Affiliations
- Department of Plant Biology, University of Illinois, 61801, Urbana, IL, USA
A. R. Zangerl & F. A. Bazzaz
Authors
- A. R. Zangerl
- F. A. Bazzaz
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Zangerl, A.R., Bazzaz, F.A. The response of plants to elevated CO2.Oecologia 62, 412–417 (1984). https://doi.org/10.1007/BF00384276
- Received: 03 February 1984
- Issue date: June 1984
- DOI: https://doi.org/10.1007/BF00384276