Six years of solar UV-B manipulations affect growth of Sphagnum and vascular plants in a Tierra del Fuego peatland

T. Matthew Robson, Verónica A. Pancotto, Stephan D. Flint, Carlos L. Ballaré, Osvaldo Sala, Ana L. Scopel, Martyn M. Caldwell

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

• Tierra del Fuego is subject to increases in solar UV-B radiation in the austral spring and summer due to ozone depletion. • Plastic films were used to filter solar UV-B radiation over peatland plots through six field seasons, resulting in near-ambient (c. 90%) and reduced (c. 17%) solar UV-B treatments. • As in the first three field seasons of treatments, near-ambient UV-B caused reduced height growth but had no effect on biomass production of the moss Sphagnum magellanicum. It reduced leaf and rhizome growth of Tetroncium magellanicum. Height growth and morphology of Empetrum rubrum and Nothofagus antarctica were only affected by solar UV-B during the fourth to sixth field seasons. There was also a decrease in Tetroncium leaf nitrogen under near-ambient UV-B. • Growth of Sphagnum was less affected than that of most emergent vascular plants. This enabled the Sphagnum mat to engulf more Nothofagus, and limit the escape of Empetrum under near-ambient UV-B. Yet, differences in the response of species to solar UV-B were not expressed as changes in plant community composition.

Original languageEnglish (US)
Pages (from-to)379-389
Number of pages11
JournalNew Phytologist
Volume160
Issue number2
DOIs
StatePublished - Nov 2003
Externally publishedYes

Fingerprint

Sphagnopsida
Sphagnum
peatlands
Empetrum
vascular plants
Blood Vessels
Nothofagus
Growth
Sphagnum magellanicum
emergent plants
ozone depletion
plastic film
Ozone Depletion
Radiation
Plastic films
rhizomes
Antarctica
Rhizome
mosses and liverworts
leaves

Keywords

  • Climate change
  • Long-term ecological study
  • Ozone depletion
  • Peatland
  • Plant community
  • Sphagnum
  • Tierra del Fuego
  • UV-B radiation

ASJC Scopus subject areas

  • Plant Science
  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry

Cite this

Robson, T. M., Pancotto, V. A., Flint, S. D., Ballaré, C. L., Sala, O., Scopel, A. L., & Caldwell, M. M. (2003). Six years of solar UV-B manipulations affect growth of Sphagnum and vascular plants in a Tierra del Fuego peatland. New Phytologist, 160(2), 379-389. https://doi.org/10.1046/j.1469-8137.2003.00898.x

Six years of solar UV-B manipulations affect growth of Sphagnum and vascular plants in a Tierra del Fuego peatland. / Robson, T. Matthew; Pancotto, Verónica A.; Flint, Stephan D.; Ballaré, Carlos L.; Sala, Osvaldo; Scopel, Ana L.; Caldwell, Martyn M.

In: New Phytologist, Vol. 160, No. 2, 11.2003, p. 379-389.

Research output: Contribution to journalArticle

Robson, T. Matthew ; Pancotto, Verónica A. ; Flint, Stephan D. ; Ballaré, Carlos L. ; Sala, Osvaldo ; Scopel, Ana L. ; Caldwell, Martyn M. / Six years of solar UV-B manipulations affect growth of Sphagnum and vascular plants in a Tierra del Fuego peatland. In: New Phytologist. 2003 ; Vol. 160, No. 2. pp. 379-389.
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