Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years
It has been suggested(1-3) that increased springtime UVB radiation caused by stratospheric ozone depletion is likely to reduce primary production and induce changes in the species composition of Antarctic marine phytoplankton. Experiments conducted at Arthur Harbour in the Antarctic Peninsula reveal...
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ftunivtasecite:oai:ecite.utas.edu.au:75957 2023-05-15T14:02:30+02:00 Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years McMinn, A Heijins, H Hodgson, D 1994 application/pdf https://doi.org/10.1038/370547a0 http://ecite.utas.edu.au/75957 en eng Nature Publishing Group http://ecite.utas.edu.au/75957/1/McMinn94 nature.pdf http://dx.doi.org/10.1038/370547a0 McMinn, A and Heijins, H and Hodgson, D, Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years, Nature: International Weekly Journal of Science, 370 pp. 547-549. ISSN 0028-0836 (1994) [Refereed Article] http://ecite.utas.edu.au/75957 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 1994 ftunivtasecite https://doi.org/10.1038/370547a0 2019-12-13T21:42:25Z It has been suggested(1-3) that increased springtime UVB radiation caused by stratospheric ozone depletion is likely to reduce primary production and induce changes in the species composition of Antarctic marine phytoplankton. Experiments conducted at Arthur Harbour in the Antarctic Peninsula revealed a reduction in primary productivity at both ambient and increased levels of UVB (ref. 4). Laboratory studies have shown that most species in culture are sensitive to high UVB levels, although the level at which either growth or photosynthesis is inhibited is variable (5,6). Stratospheric ozone depletion, with resultant increased springtime UVB irradiance, has been occurring with increasing severity since the late 1970s. Thus the phytoplankton community has already experienced about 20 years' exposure to increasing levels of UVB radiation. Here we present analyses of diatom assemblages from high-resolution stratigraphic sequences from anoxic basins in fjords of the Vestfolds Hills, Antarctica. We find that compositional changes in the diatom component of the phytoplankton community over the past 20 years cannot be distinguished from long-term natural variability, although there is some indication of a decline in the production of some sea-ice diatoms. We anticipate that our results are applicable to other Antarctic coastal regions, where thick ice cover and the timing of the phytoplankton bloom protect the phytoplankton from the effects of increased UVB radiation. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Sea ice eCite UTAS (University of Tasmania) Antarctic Antarctic Peninsula Arthur Harbour ENVELOPE(-64.064,-64.064,-64.770,-64.770) The Antarctic Nature 370 6490 547 549 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) McMinn, A Heijins, H Hodgson, D Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
It has been suggested(1-3) that increased springtime UVB radiation caused by stratospheric ozone depletion is likely to reduce primary production and induce changes in the species composition of Antarctic marine phytoplankton. Experiments conducted at Arthur Harbour in the Antarctic Peninsula revealed a reduction in primary productivity at both ambient and increased levels of UVB (ref. 4). Laboratory studies have shown that most species in culture are sensitive to high UVB levels, although the level at which either growth or photosynthesis is inhibited is variable (5,6). Stratospheric ozone depletion, with resultant increased springtime UVB irradiance, has been occurring with increasing severity since the late 1970s. Thus the phytoplankton community has already experienced about 20 years' exposure to increasing levels of UVB radiation. Here we present analyses of diatom assemblages from high-resolution stratigraphic sequences from anoxic basins in fjords of the Vestfolds Hills, Antarctica. We find that compositional changes in the diatom component of the phytoplankton community over the past 20 years cannot be distinguished from long-term natural variability, although there is some indication of a decline in the production of some sea-ice diatoms. We anticipate that our results are applicable to other Antarctic coastal regions, where thick ice cover and the timing of the phytoplankton bloom protect the phytoplankton from the effects of increased UVB radiation. |
format |
Article in Journal/Newspaper |
author |
McMinn, A Heijins, H Hodgson, D |
author_facet |
McMinn, A Heijins, H Hodgson, D |
author_sort |
McMinn, A |
title |
Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years |
title_short |
Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years |
title_full |
Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years |
title_fullStr |
Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years |
title_full_unstemmed |
Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years |
title_sort |
minimal effects of uvb radiation on antarctic diatoms over the past 20 years |
publisher |
Nature Publishing Group |
publishDate |
1994 |
url |
https://doi.org/10.1038/370547a0 http://ecite.utas.edu.au/75957 |
long_lat |
ENVELOPE(-64.064,-64.064,-64.770,-64.770) |
geographic |
Antarctic Antarctic Peninsula Arthur Harbour The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Arthur Harbour The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Sea ice |
op_relation |
http://ecite.utas.edu.au/75957/1/McMinn94 nature.pdf http://dx.doi.org/10.1038/370547a0 McMinn, A and Heijins, H and Hodgson, D, Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years, Nature: International Weekly Journal of Science, 370 pp. 547-549. ISSN 0028-0836 (1994) [Refereed Article] http://ecite.utas.edu.au/75957 |
op_doi |
https://doi.org/10.1038/370547a0 |
container_title |
Nature |
container_volume |
370 |
container_issue |
6490 |
container_start_page |
547 |
op_container_end_page |
549 |
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1766272784668819456 |