| |
| Web URL(s): | http://www.jstor.org/stable/2558930
Last checked: 12/18/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Wolfenden, J.;
Diggle, P. J. |
|---|
| Author Affiliation: | Institute of Environmental & Biological Sciences, Lancaster University, Lancaster LA1 4YQ, UK; Center for Applied Statistics, Lancaster University, Lancaster LA1 4YQ, UK |
|---|
| Title: | Canopy gas exchange and growth of upland pasture swards in elevated CO₂ |
|---|
| Source: | New Phytologist. Vol. 130, No. 3, July 1995, p. 369-380. |
|---|
| Publishing Information: | Oxford, England: Cambridge University Press. |
|---|
| # of Pages: | 12 |
|---|
| Keywords: | TIC Keywords: Canopy; Monolith sampling; Photosynthesis; Air; Carbon dioxide; Limestone; Grasslands; Biomass; Productivity; Respiration; Pastures; Acidic soils; Assimilation; Species
|
|---|
| Abstract/Contents: | "Vegetation monoliths (450 x 450 mm) from contrasting upland grassland communities were grown in Solardomes in either ambient air or ambient air enriched with 250 ppm CO₂. During the first two growing seasons measurements of canopy gas exchange showed that rates of photosynthesis of limestone swards were enhanced by growth in elevated CO₂, by approx. 50% during spring and early summer. Although canopy respiration was also greater in elevated CO₂, the overall effect was an average increase of 33% in net CO₂ assimilation. Enhanced respiration rates persisted into the autumn, whereas the effect on photosynthesis diminished through the growing season, so that in September swards growing in high CO₂ had net photosynthesis rates similar to, or even lower than those in ambient air. This response varied between swards of differing species composition. In acidic grassland no significant effects of CO₂ on respiration or net CO₂ uptake rates were detected at any time. The above ground productivity of limestone grassland was measured in several harvests throughout both seasons, and was not affected by CO₂ concentration at any time. Similarly, the acidic grassland, harvested at the end of the second season, showed no significant effect of CO₂ on above-ground biomass. The results suggest that increasing atmospheric CO₂ concentration is unlikely to cause large changes in net primary productivity in these grasslands." |
|---|
| Language: | English |
|---|
| References: | 34 |
|---|
| Note: | Figures
Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wolfenden, J., and P. J. Diggle. 1995. Canopy gas exchange and growth of upland pasture swards in elevated CO₂. New Phytol. 130(3):p. 369-380. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=35043 |
| If there are problems with this record, send us feedback about record 35043. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.jstor.org/stable/2558930
Last checked: 12/18/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: QK 1 .N38 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
