Effects of enhanced ultraviolet radiation and carbon dioxide concentration on the moss Hylocomium splendens
Article first published online: 27 APR 2006
Global Change Biology
Volume 2, Issue 1, pages 67–73, February 1996
How to Cite
SONESSON, M., CALLAGHAN, T. V. and CARLSSON, B. Å. (1996), Effects of enhanced ultraviolet radiation and carbon dioxide concentration on the moss Hylocomium splendens. Global Change Biology, 2: 67–73. doi: 10.1111/j.1365-2486.1996.tb00050.x
- Issue published online: 27 APR 2006
- Article first published online: 27 APR 2006
- Received 22 August 1995; revision accepted 20 October 1995
- CO2 growth;
- Hylocomium splendens;
In a laboratory experiment interaction effects of UV-B and CO2 on photosynthesis and growth of the moss Hylocomium splendens were studied. The plants were exposed to two CO2 levels (350 ppm and 600 ppm) and three UV-B levels (no UV-B, ambient UV-B and that corresponding to 20% ozone depletion) for 5 months. The effects were recorded by measuring the photosynthetic response and growth of the plants.
There was a statistically significant change in photosynthetic efficiency and maximum photosynthetic rates due to time and to enhanced CO2 concentration, whereas there was no effect due to UV-B. There was a decreased growth due to both UV-B and CO2 and an interaction effect on growth (in length). The UV-B dose corresponding to the ambient level had a larger reducing effect on growth than the highest UV-B dose. This was a counter-intuitive result and the following tentative interpretation was made: differences in the measured UV-A/UV-B/PAR ratios between the treatments could explain the result provided there was a non-linear response to UV over the range of irradiance levels used.