Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone
Ultraviolet radiation (UVR) affects biotic and abiot ic factors in marine ecosystems. Effects on organisms are mostly deleterious due co dam-age to DNA and cellular proteins that are involved in biochemical pro-cesses and which ultimately affect growth and reproduction. Differential sensitivity amon...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.634.5377 2023-05-15T13:37:45+02:00 Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone Marfa Vernet Raymond C. Smith The Pennsylvania State University CiteSeerX Archives 1997 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5377 http://pal.lternet.edu/docs/bibliography/Public/153lterc.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5377 http://pal.lternet.edu/docs/bibliography/Public/153lterc.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pal.lternet.edu/docs/bibliography/Public/153lterc.pdf text 1997 ftciteseerx 2016-01-08T15:38:17Z Ultraviolet radiation (UVR) affects biotic and abiot ic factors in marine ecosystems. Effects on organisms are mostly deleterious due co dam-age to DNA and cellular proteins that are involved in biochemical pro-cesses and which ultimately affect growth and reproduction. Differential sensitivity among microalgal species to UVR has been shown to shift community composition. As a result of this shift. the total primary pro-duction for the com munity may be maintained at pre-UVR levels. Simi-lar impacts and mechanisms are expected in Antarctic waters. The over-all effect of UVR on the ecosystem needs ro include relevant feedback mechanisms which can diminish, and sometimes reverse, deleterious ef-feers on population growth. For example. it has been speculated that UVR can increase iron-limited phytoplankton populations by photoin-duced reduction of Fe l- to Fe '-. a more soluble form of iron and readily avai lable for algal and bacterial uptake. An equally positive feedback can be attributed to diminished g razi ng by zooplankton. Thus. energy flow among [he troph ic levels can decrease as a result of damage to a certain trophic level. but overall biomass and ecosystem production might remain relatively unchanged. Similar positive and negative feedbacks associated wit h UVR are re-lated to the dissolved organic matter (DOM) pool, known to be recycled by baererial activity. Although it cou ld be expected t hat bacterial pro-duction in Antarctic surface waters would decrease when exposed to UVR, this effect can be counteracted by increased substrate nutrient availabi l-ity. Photolysis of high-molecular weight molecules by UVR produces Text Antarc* Antarctic Unknown Antarctic |
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Ultraviolet radiation (UVR) affects biotic and abiot ic factors in marine ecosystems. Effects on organisms are mostly deleterious due co dam-age to DNA and cellular proteins that are involved in biochemical pro-cesses and which ultimately affect growth and reproduction. Differential sensitivity among microalgal species to UVR has been shown to shift community composition. As a result of this shift. the total primary pro-duction for the com munity may be maintained at pre-UVR levels. Simi-lar impacts and mechanisms are expected in Antarctic waters. The over-all effect of UVR on the ecosystem needs ro include relevant feedback mechanisms which can diminish, and sometimes reverse, deleterious ef-feers on population growth. For example. it has been speculated that UVR can increase iron-limited phytoplankton populations by photoin-duced reduction of Fe l- to Fe '-. a more soluble form of iron and readily avai lable for algal and bacterial uptake. An equally positive feedback can be attributed to diminished g razi ng by zooplankton. Thus. energy flow among [he troph ic levels can decrease as a result of damage to a certain trophic level. but overall biomass and ecosystem production might remain relatively unchanged. Similar positive and negative feedbacks associated wit h UVR are re-lated to the dissolved organic matter (DOM) pool, known to be recycled by baererial activity. Although it cou ld be expected t hat bacterial pro-duction in Antarctic surface waters would decrease when exposed to UVR, this effect can be counteracted by increased substrate nutrient availabi l-ity. Photolysis of high-molecular weight molecules by UVR produces |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Marfa Vernet Raymond C. Smith |
spellingShingle |
Marfa Vernet Raymond C. Smith Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone |
author_facet |
Marfa Vernet Raymond C. Smith |
author_sort |
Marfa Vernet |
title |
Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone |
title_short |
Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone |
title_full |
Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone |
title_fullStr |
Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone |
title_full_unstemmed |
Effects of ultraviolet radiation on the pelagic Antarctic ecosystem, in: D-P. Hader (Ed.), The effects of Ozone |
title_sort |
effects of ultraviolet radiation on the pelagic antarctic ecosystem, in: d-p. hader (ed.), the effects of ozone |
publishDate |
1997 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5377 http://pal.lternet.edu/docs/bibliography/Public/153lterc.pdf |
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Antarctic |
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Antarctic |
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Antarc* Antarctic |
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Antarc* Antarctic |
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http://pal.lternet.edu/docs/bibliography/Public/153lterc.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.5377 http://pal.lternet.edu/docs/bibliography/Public/153lterc.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766097238430318592 |