Stratospheric Ozone Depletion: High Arctic Tundra Plant Growth on Svalbard is not Affected by Enhanced UV-B after 7 years of UV-B Supplementation in the Field
| Autor: | Terry V. Callaghan, Marieke Doorenbosch, Peter Blokker, Matthias Zielke, Jelger Herder, Jelte Rozema, Ruben Fijn, Dylan Gwynn Jones, Alwin Buskens, Willem H. van de Poll, Peter Boelen, Bjørn Solheim, Rob Broekman, Lars Olof Björn |
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| Přispěvatelé: | Ocean Ecosystems, Systems Ecology |
| Rok vydání: | 2006 |
| Předmět: |
ozone depletion
leaf area tundra SOLAR ULTRAVIOLET-RADIATION Polytrichum Dryas octopetala Plant Science Cassiope tetragona Arctic ultraviolet-b radiation Botany DESCHAMPSIA-ANTARCTICA Salix polaris inflorescence cover GLOBAL CHANGE gametophyte CLIMATE-CHANGE Ecology biology DNA-damage Pedicularis hirsuta plant density CASSIOPE-TETRAGONA Polytrichum hyperboreum Sanionia uncinata biology.organism_classification Ozone depletion Moss thickness Tundra TERRESTRIAL ECOSYSTEMS Bistorta vivipara DWARF SHRUBS supplementation HEATH ECOSYSTEM VASCULAR PLANTS |
| Zdroj: | Plant ecology, 182(1-2), 121-135 Rozema, J, Boelen, P, Solheim, B, Zielke, M, Buskens, A, Doorenbosch, M, Fijn, R, Herder, J, Callaghan, T V, Bjorn, L O, Gwynn-Jones, D, Broekman, R A, Blokker, P & van de Poll, W 2006, ' Stratospheric ozone depletion: high arctic tundra plant growth on Svalbard is not affected by enhanced UV-B after 7 years of UV-B supplementation in the field ', Plant Ecology, vol. 182, no. 1-2, pp. 121-135 . https://doi.org/10.1007/s11258-005-9035-x Plant Ecology, 182(1-2), 121-135. Springer Netherlands |
| ISSN: | 1573-5052 1385-0237 |
| DOI: | 10.1007/s11258-005-9035-x |
| Popis: | The response of tundra plants to enhanced UV-B radiation simulating 15 and 30% ozone depletion was studied at two high arctic sites (Isdammen and Adventdalen, 78° N, Svalbard).The set-up of the UV-B supplementation systems is described, consisting of large and small UV lamp arrays, installed in 1996 and 2002. After 7 years of exposure to enhanced UV-B radiation, plant cover, density, morphological (leaf fresh and dry weight, leaf thickness, leaf area, reproductive and ecophysiological parameters leaf UV-B absorbance, leaf phenolic content, leaf water content) were not affected by enhanced UV-B radiation. DNA damage in the leaves was not increased with enhanced UV-B in Salix polaris and Cassiope tetragona. DNA damage in Salix polaris leaves was higher than in leaves of C. tetragona. The length of male gametophyte moss plants of Polytrichum hyperboreum was reduced with elevated UV-B as well as the number of Pedicularis hirsuta plants per plot, but the inflorescence length of Bistorta vivipara was not significantly affected. We discuss the possible causes of tolerance of tundra plants to UV-B (absence of response to enhanced UV-B) in terms of methodology (supplementation versus exclusion), ecophysiological adaptations to UV-B and the biogeographical history of polar plants © Springer 2006. |
| Databáze: | OpenAIRE |
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