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Details van artikel 53 van 144 gevonden artikelen
| Titel: |
Effects of climate warming and declining species richness in grassland model ecosystems: acclimation of CO2 fluxes |
| Auteur: |
S. Vicca P. Serrano-Ortiz H. J. De Boeck C. M. H. M. Lemmens I. Nijs R. Ceulemans A. S. Kowalski I. A. Janssens |
| Verschenen in: |
Biogeosciences discussions |
| Paginering: | Jaargang 3 (2006) nr. 5 pagina's 1473-1498 |
| Jaar: |
2006 |
| Inhoud: |
To study the effects of warming and declining species richness on the carbon balance of grassland communities, model ecosystems containing one, three or nine species were exposed to ambient and elevated (ambient +3°C) air temperature. In this paper, we analyze measured ecosystem CO2 fluxes to test whether ecosystem photosynthesis and respiration had acclimated to warming after 28 months of continuous heating, and whether the degree of acclimation depended on species richness. At first sight, we found no signs of acclimation in photosynthesis or respiration. However, because plant cover was significantly higher in the heated treatment, normalization for plant cover revealed down-regulation of both photosynthesis and respiration. Although CO2 fluxes were larger in communities with higher species richness, species richness did not affect the degree of acclimation to warming. These results imply that models need to take into account thermal acclimation to simulate photosynthesis and respiration in a warmer world. |
| Uitgever: |
Copernicus Publications (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 53 van 144 gevonden artikelen
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