TY - JOUR
T1 - Consequences of depletion of stratospheric ozone for terrestrial Antarctic ecosystems: the response of Deschampsia antarctica to enhanced UV-B radiation in a controlled environment
AU - Rozema, J.J.
AU - Broekman, R.
AU - Lud, D.
AU - Huiskes, A.H.L.
AU - Moerdijk-Poortvliet, T.C.W.
AU - De Bakker, N.
AU - Meijkamp, B.
AU - Van Beem, A.
N1 - Reporting year: 2001
Metis note: 2890; CEME; PGPE; file:///L:/Endnotedatabases/NIOOPUB/pdfs/Pdfs2001/Rozema_ea_2890.pdf
PY - 2001
Y1 - 2001
N2 - Mini UV lamps were installed over antarctic plants at Leonie Island, Antarctic peninsula, and shoot length measurements of Deschampsia antarctica were performed during the austral summer January-February 1999. We studied the response of the antarctic hairgrass, Deschampsia antarctica to enhanced UV-B. In a climate room experiment we exposed tillers of Deschampsia antarctica, collected at Leonie Island, Antarctic peninsula, to ambient and enhanced levels of UV-B radiation. In this climate room experiment with 0, 2.5 and 5 kJ m(-2) day(-1) UV-B-BE treatments we observed that length growth of shoots at 2.5 and 5 kJ m(-2) day(-1) UV-B-BE was markedly reduced compared to 0 kJ m(-2) day(-1) UV-B-BE. In addition, there was an increased number of shoots and increased leaf thickness with enhanced UV- B. The Relative Growth Rate (RGR) was not affected by UV-B, possibly because reduced shoot length growth by enhanced UV-B was compensated by increased tillering. Light response curves of net leaf photosynthesis of plants exposed to 5 kJ m(-2) day(-)1 UV-BBE did not differ from those exposed to 0 kJ m(-)2 day(-1) UV-B-BE. The content of UV-B absorbing compounds of plants exposed to increasing UV-B did not significantly change. Mini UV-B lamp systems were installed in the field, to expose the terrestrial antarctic vegetation at Leonie Island to enhanced solar UV-B. In that study, the increment of shoot length of tagged plants of Deschampsia antarctica during the January-February 1999 at Leonie Island, was recorded and compared to shoot length growth under controlled conditions. The consequences of enhanced UV-B radiation as a result of ozone depletion for the terrestrial antarctic ecosytems are discussed. [KEYWORDS: Antarctica; climate change; Deschampsia antarctica; ecosystem; ozone depletion; UV-B; UV-B supplementation Solar ultraviolet-radiation; vascular plants; earths surface;dna-damage; photosynthesis; growth; reproduction; phytoplankton; temperature; peninsula]
AB - Mini UV lamps were installed over antarctic plants at Leonie Island, Antarctic peninsula, and shoot length measurements of Deschampsia antarctica were performed during the austral summer January-February 1999. We studied the response of the antarctic hairgrass, Deschampsia antarctica to enhanced UV-B. In a climate room experiment we exposed tillers of Deschampsia antarctica, collected at Leonie Island, Antarctic peninsula, to ambient and enhanced levels of UV-B radiation. In this climate room experiment with 0, 2.5 and 5 kJ m(-2) day(-1) UV-B-BE treatments we observed that length growth of shoots at 2.5 and 5 kJ m(-2) day(-1) UV-B-BE was markedly reduced compared to 0 kJ m(-2) day(-1) UV-B-BE. In addition, there was an increased number of shoots and increased leaf thickness with enhanced UV- B. The Relative Growth Rate (RGR) was not affected by UV-B, possibly because reduced shoot length growth by enhanced UV-B was compensated by increased tillering. Light response curves of net leaf photosynthesis of plants exposed to 5 kJ m(-2) day(-)1 UV-BBE did not differ from those exposed to 0 kJ m(-)2 day(-1) UV-B-BE. The content of UV-B absorbing compounds of plants exposed to increasing UV-B did not significantly change. Mini UV-B lamp systems were installed in the field, to expose the terrestrial antarctic vegetation at Leonie Island to enhanced solar UV-B. In that study, the increment of shoot length of tagged plants of Deschampsia antarctica during the January-February 1999 at Leonie Island, was recorded and compared to shoot length growth under controlled conditions. The consequences of enhanced UV-B radiation as a result of ozone depletion for the terrestrial antarctic ecosytems are discussed. [KEYWORDS: Antarctica; climate change; Deschampsia antarctica; ecosystem; ozone depletion; UV-B; UV-B supplementation Solar ultraviolet-radiation; vascular plants; earths surface;dna-damage; photosynthesis; growth; reproduction; phytoplankton; temperature; peninsula]
KW - NIOO/PG/PE
U2 - 10.1023/A:1012956230160
DO - 10.1023/A:1012956230160
M3 - Article
SN - 1385-0237
VL - 154
SP - 101
EP - 115
JO - Plant Ecology
JF - Plant Ecology
IS - 1-2
ER -