Ecological importance of ambient solar ultraviolet radiation to a sub-arctic heath community

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dc.contributor.author Callaghan, Terry V.
dc.contributor.author Phoenix, Gareth K.
dc.contributor.author Gwynn-Jones, Dylan
dc.contributor.author Lee, John A.
dc.date.accessioned 2009-11-26T10:14:15Z
dc.date.available 2009-11-26T10:14:15Z
dc.date.issued 2003-04
dc.identifier.citation Callaghan , T V , Phoenix , G K , Gwynn-Jones , D & Lee , J A 2003 , ' Ecological importance of ambient solar ultraviolet radiation to a sub-arctic heath community ' Plant Ecology , vol 165 , no. 2 , pp. 263-273 . en
dc.identifier.issn 1385-0237
dc.identifier.other PURE: 138551
dc.identifier.other dspace: 2160/3650
dc.identifier.uri http://hdl.handle.net/2160/3650
dc.description Phoenix, G. K., Gwynn-Jones, D., Lee, J. A., Callaghan, T. V. (2003). Ecological importance of ambient solar ultraviolet radiation to a sub-arctic heath community.   Plant Ecology, 165, (2), 263-273. Sponsorship: CEC (contract EV5V-CT910032) as part of the UVECOS consortium. The Royal Swedish Academy of Sciences; Natural Environment Research Council (UK); en
dc.description.abstract While there is considerable knowledge of the effects of enhanced levelsof ultraviolet radiation (UV) on plant species, much less is known of theimportance of ambient levels of solar UV, particularly on natural plantcommunities. Effects of ambient solar UV radiation on a natural sub-Arcticheathcommunity were investigated in a three year UV exclusion experiment in northernSweden (68° N). UV transparent and UV opaque (excluding< 400 nm) plexiglas screens were placed over vegetation forthree years to determine ambient solar UV effects on growth, reproduction andphenology of the three dominant dwarf shrub species, Vacciniumuliginosum, V. vitis-idaea andEmpetrum hermaphroditum. Additionally, effects of ambientsolar UV radiation on leaf protection from UV-B were assessed throughmeasurements of leaf UV-B absorbing compounds. Flowering and berry productionbyV. uliginosum were greatly increased (by five and 15 fold)in plots receiving ambient solar UV compared to those where solar UV had beenexcluded for three years. However, solar UV had no effect on stem growth,senescence and cover of the dwarf shrub species studied. It was thereforeconcluded that sub-Arctic dwarf shrubs are generally tolerant of ambient solarUV. Counterintuitively, ambient solar UV radiation reduced the levels of UV-Babsorbing compounds in both Vaccinium species suggesting areduction in protection provided. This indicates that measurements of leaf UV-Babsorbing compounds do not necessarily provide a good indicator of planttolerance to UV. en
dc.format.extent 11 en
dc.language.iso eng
dc.relation.ispartof Plant Ecology en
dc.subject Dwarf shrubs en
dc.subject Empetrum en
dc.subject Growth en
dc.subject Reproduction en
dc.subject UV-B absorbing compounds en
dc.subject Vaccinium en
dc.title Ecological importance of ambient solar ultraviolet radiation to a sub-arctic heath community en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1023/A:1022276831900
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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