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Short-term effects of enhanced UV-B and CO2 on lichens at different latitudes

Sonesson, M; Callaghan, T V and Björn, Lars Olof LU (1995) In Lichenologist 27(6). p.547-557
Abstract
Interaction effects of UV-B and CO2 on three lichens species, Cladonia arbusculo, Cetraria islandica and Stereocaulon paschale, from two latitudinal sites, 68N and 56N, were studied in a laboratory experiment. The response of the plants was recorded by measuring their chlorophyll fluorescence. All species had a similar response to enhanced UV-B depending on the latitude from which the population came and the time of the season when they were sampled. Overall, there was a significant increase in photosystem II yield (as measured by a fluorescence technique) due to UV-B and no separate effect due to enhanced CO2, although there was a significant interaction between CO2 and UV-B. The increase due to UV-B was at the low CO2 level. There were... (More)
Interaction effects of UV-B and CO2 on three lichens species, Cladonia arbusculo, Cetraria islandica and Stereocaulon paschale, from two latitudinal sites, 68N and 56N, were studied in a laboratory experiment. The response of the plants was recorded by measuring their chlorophyll fluorescence. All species had a similar response to enhanced UV-B depending on the latitude from which the population came and the time of the season when they were sampled. Overall, there was a significant increase in photosystem II yield (as measured by a fluorescence technique) due to UV-B and no separate effect due to enhanced CO2, although there was a significant interaction between CO2 and UV-B. The increase due to UV-B was at the low CO2 level. There were also significant differences in response due to latitude. The results contradict our hypotheses that negative effects of UV-B would be larger in the North than in the South and that a negative response should be especially large during the early season. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Lichenologist
volume
27
issue
6
pages
547 - 557
publisher
Cambridge University Press
external identifiers
  • scopus:0000369670
ISSN
0024-2829
DOI
10.1016/S0024-2829(95)80013-1
language
English
LU publication?
yes
id
15371991-81a0-4cfb-825b-76060a2cd505 (old id 134491)
date added to LUP
2007-07-30 13:17:20
date last changed
2017-10-01 04:51:34
@article{15371991-81a0-4cfb-825b-76060a2cd505,
  abstract     = {Interaction effects of UV-B and CO2 on three lichens species, Cladonia arbusculo, Cetraria islandica and Stereocaulon paschale, from two latitudinal sites, 68N and 56N, were studied in a laboratory experiment. The response of the plants was recorded by measuring their chlorophyll fluorescence. All species had a similar response to enhanced UV-B depending on the latitude from which the population came and the time of the season when they were sampled. Overall, there was a significant increase in photosystem II yield (as measured by a fluorescence technique) due to UV-B and no separate effect due to enhanced CO2, although there was a significant interaction between CO2 and UV-B. The increase due to UV-B was at the low CO2 level. There were also significant differences in response due to latitude. The results contradict our hypotheses that negative effects of UV-B would be larger in the North than in the South and that a negative response should be especially large during the early season.},
  author       = {Sonesson, M and Callaghan, T V and Björn, Lars Olof},
  issn         = {0024-2829},
  language     = {eng},
  number       = {6},
  pages        = {547--557},
  publisher    = {Cambridge University Press},
  series       = {Lichenologist},
  title        = {Short-term effects of enhanced UV-B and CO2 on lichens at different latitudes},
  url          = {http://dx.doi.org/10.1016/S0024-2829(95)80013-1},
  volume       = {27},
  year         = {1995},
}