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The effects of an enhanced UV-B radiation on a sub-arctic heath ecosystem

Johanson, U; Gehrke, C; Björn, Lars Olof LU ; Callaghan, T V and Sonesson, Mats LU (1995) In Ambio 24(2). p.106-112
Abstract
To investigate the effects of increased UV-B radiation on a natural subarctic ecosystem a field irradiation experiment was established at Abisko, northern Sweden. The vegetation in the plots consists of a dwarf shrub layer with mosses and lichens beneath. Many response variables of the vegetation and soil are measured in these plots, e.g. photosynthesis, growth, phenology, changes in species composition and decomposition. This paper describes the methods used and some initial results. Decomposition was imparied by enhanced UV-B radiation. UV-B directly affected decomposition processes and also affected them indirectly by altering the tissue chemistry of leaves. The annual growth of the dwarf shrubs was lower under enhanced UV-B. This was... (More)
To investigate the effects of increased UV-B radiation on a natural subarctic ecosystem a field irradiation experiment was established at Abisko, northern Sweden. The vegetation in the plots consists of a dwarf shrub layer with mosses and lichens beneath. Many response variables of the vegetation and soil are measured in these plots, e.g. photosynthesis, growth, phenology, changes in species composition and decomposition. This paper describes the methods used and some initial results. Decomposition was imparied by enhanced UV-B radiation. UV-B directly affected decomposition processes and also affected them indirectly by altering the tissue chemistry of leaves. The annual growth of the dwarf shrubs was lower under enhanced UV-B. This was more pronounced in evergreen than in deciduous species. Leaf thickness of the dwarf shrubs was changed by UV-B. The leaves of the evergreen Vaccinium vitis-idaea grew thicker, while those of the two deciduous species V. myrtillus and V. uliginosum grew thinner. In the moss Hylocomium splendens, the phenological development was accelerated under enhanced UV-B radiation. Its growth (number of primary branches, length and dry weight) also increased. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ambio
volume
24
issue
2
pages
106 - 112
publisher
Springer
external identifiers
  • scopus:0028974070
ISSN
0044-7447
language
English
LU publication?
yes
id
ff07e113-9574-4843-a093-ff6392da3834 (old id 134520)
date added to LUP
2007-07-02 10:52:00
date last changed
2017-08-20 04:26:13
@article{ff07e113-9574-4843-a093-ff6392da3834,
  abstract     = {To investigate the effects of increased UV-B radiation on a natural subarctic ecosystem a field irradiation experiment was established at Abisko, northern Sweden. The vegetation in the plots consists of a dwarf shrub layer with mosses and lichens beneath. Many response variables of the vegetation and soil are measured in these plots, e.g. photosynthesis, growth, phenology, changes in species composition and decomposition. This paper describes the methods used and some initial results. Decomposition was imparied by enhanced UV-B radiation. UV-B directly affected decomposition processes and also affected them indirectly by altering the tissue chemistry of leaves. The annual growth of the dwarf shrubs was lower under enhanced UV-B. This was more pronounced in evergreen than in deciduous species. Leaf thickness of the dwarf shrubs was changed by UV-B. The leaves of the evergreen Vaccinium vitis-idaea grew thicker, while those of the two deciduous species V. myrtillus and V. uliginosum grew thinner. In the moss Hylocomium splendens, the phenological development was accelerated under enhanced UV-B radiation. Its growth (number of primary branches, length and dry weight) also increased.},
  author       = {Johanson, U and Gehrke, C and Björn, Lars Olof and Callaghan, T V and Sonesson, Mats},
  issn         = {0044-7447},
  language     = {eng},
  number       = {2},
  pages        = {106--112},
  publisher    = {Springer},
  series       = {Ambio},
  title        = {The effects of an enhanced UV-B radiation on a sub-arctic heath ecosystem},
  volume       = {24},
  year         = {1995},
}