Publikationen
Es wurden 2 Publikationen gefunden
Moser, G.; Müller, C. & Grünhage, L. (2016-01-07). Klimawandel vor der Haustür. Presented at UKL, UKL.
Haworth, M.; Moser, G.; Raschi, A.; Kammann, C.; Grünhage, L. & Müller, C. (2016): Carbon dioxide fertilisation and supressed respiration induce enhanced spring biomass production in a mixed species temperate meadow exposed to moderate carbon dioxide enrichment. Functional Plant Biology FP15232, A-N
DOI: http://dx.doi.org/10.1071/FP15232.
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DOI: 10.1071/FP15232
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Abstract:
Abstract:
The rising concentration of carbon dioxide in the atmosphere ([CO2]) has a direct effect on terrestrial vegetation
through shifts in the rates of photosynthetic carbon uptake and transpirational water-loss. Free Air CO2 Enrichment (FACE)
experiments aim to predict the likely responses of plants to increased [CO2] under normal climatic conditions. The Giessen
FACE system operates a lower [CO2] enrichment regime (480 mmol mol–1) than standard FACE (550–600 mmol mol–1),
permitting the analysis of a mixed species temperate meadow under a [CO2] level equivalent to that predicted in 25–30 years.
We analysed the physiological and morphological responses of six species to investigate the effect of moderate [CO2] on
spring biomass production. Carbon dioxide enrichment stimulated leaf photosynthetic rates and supressed respiration,
contributing to enhanced net assimilation and a 23% increase in biomass. The capacity for photosynthetic assimilation was
unaffected by [CO2] enrichment, with no downregulation of rates of carboxylation of Rubisco or regeneration of ribulose-
1,5-bisphosphate. Foliar N content was also not influenced by increased [CO2]. Enhanced [CO2] reduced stomatal size, but
stomatal density and leaf area index remained constant, suggesting that the effect on gas exchange was minimal.
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Keywords: |
ring |
biomass |