Advanced

The Effects of Enhanced UV-B Radiation on the Growth of Dwarf Shrubs in a Subarctic Heathland

Johanson, U; Gehrke, C; Björn, Lars Olof LU and Callaghan, T V (1995) In Functional Ecology 9(5). p.713-719
Abstract
In a field irradiation experiment UV-B radiation was enhanced to simulate 15% ozone depletion under clear sky conditions in northern Sweden. This was accomplished by using UV-B fluorescent lamps mounted on metal frames raised over a naturally growing plant community. 2. The study area consisted of a dwarf shrub heath mainly composed of the four species Vaccinium vitis-idaea, V. myrtillus, V. uliginosum and Empetrum hermaphroditum. The absolute annual stem growth, relative stem growth and absolute leaf growth were recorded for different years. 3. The relative growth was significantly reduced by UV-B enhancement in the two evergreen species V. vitis-idaea (27% after 2 years of enhanced UV-B) and E. hermaphroditum (14% after 1 year and 33%... (More)
In a field irradiation experiment UV-B radiation was enhanced to simulate 15% ozone depletion under clear sky conditions in northern Sweden. This was accomplished by using UV-B fluorescent lamps mounted on metal frames raised over a naturally growing plant community. 2. The study area consisted of a dwarf shrub heath mainly composed of the four species Vaccinium vitis-idaea, V. myrtillus, V. uliginosum and Empetrum hermaphroditum. The absolute annual stem growth, relative stem growth and absolute leaf growth were recorded for different years. 3. The relative growth was significantly reduced by UV-B enhancement in the two evergreen species V. vitis-idaea (27% after 2 years of enhanced UV-B) and E. hermaphroditum (14% after 1 year and 33% after 2 years). The two deciduous species also showed a tendency for decreased relative growth under enhanced UV-B, but this effect was not statistically significant. 4. The leaf thickness of V. vitis-idaea increased both during 1992 (9%) and 1993 (4%). In contrast, the two deciduous species V. myrtillus and V. uliginosum developed thinner leaves under enhanced UV-B both during 1992 (4% for V. myrtillus, 6% for V. uliginosum) and 1993 (9% for V. myrtillus, 10% for V. uliginosum). (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Functional Ecology
volume
9
issue
5
pages
713 - 719
publisher
Wiley-Blackwell
external identifiers
  • scopus:0028984384
ISSN
1365-2435
language
English
LU publication?
yes
id
dbaa3aab-b006-4c2c-ab06-8cd308b96870 (old id 134496)
alternative location
http://links.jstor.org/sici?sici=0269-8463%28199510%299%3A5%3C713%3ATEOEUR%3E2.0.CO%3B2-F
date added to LUP
2007-07-02 10:51:20
date last changed
2017-01-01 04:27:48
@article{dbaa3aab-b006-4c2c-ab06-8cd308b96870,
  abstract     = {In a field irradiation experiment UV-B radiation was enhanced to simulate 15% ozone depletion under clear sky conditions in northern Sweden. This was accomplished by using UV-B fluorescent lamps mounted on metal frames raised over a naturally growing plant community. 2. The study area consisted of a dwarf shrub heath mainly composed of the four species Vaccinium vitis-idaea, V. myrtillus, V. uliginosum and Empetrum hermaphroditum. The absolute annual stem growth, relative stem growth and absolute leaf growth were recorded for different years. 3. The relative growth was significantly reduced by UV-B enhancement in the two evergreen species V. vitis-idaea (27% after 2 years of enhanced UV-B) and E. hermaphroditum (14% after 1 year and 33% after 2 years). The two deciduous species also showed a tendency for decreased relative growth under enhanced UV-B, but this effect was not statistically significant. 4. The leaf thickness of V. vitis-idaea increased both during 1992 (9%) and 1993 (4%). In contrast, the two deciduous species V. myrtillus and V. uliginosum developed thinner leaves under enhanced UV-B both during 1992 (4% for V. myrtillus, 6% for V. uliginosum) and 1993 (9% for V. myrtillus, 10% for V. uliginosum).},
  author       = {Johanson, U and Gehrke, C and Björn, Lars Olof and Callaghan, T  V},
  issn         = {1365-2435},
  language     = {eng},
  number       = {5},
  pages        = {713--719},
  publisher    = {Wiley-Blackwell},
  series       = {Functional Ecology},
  title        = {The Effects of Enhanced UV-B Radiation on the Growth of Dwarf Shrubs in a Subarctic Heathland},
  volume       = {9},
  year         = {1995},
}