Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile
The effect of ultraviolet (UV) radiation on marine organisms has been an important focus of recent research, with depletion of the ozone layer resulting in increased UV radiation at high latitudes. Several studies have identified negative impacts of UV radiation on the biology of zooplanktonic organ...
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ftarcticportal:oai:generic.eprints.org:2569 2023-11-12T03:59:41+01:00 Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile Lagos, Paulo F. Valdés, M. Jesús Manríquez, Karen 2015-06 application/pdf http://library.arcticportal.org/2569/ http://library.arcticportal.org/2569/1/A20150204.pdf en eng Polar Research Institute of China - PRIC http://library.arcticportal.org/2569/1/A20150204.pdf Lagos, Paulo F. and Valdés, M. Jesús and Manríquez, Karen (2015) Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile. Advances in Polar Science, 26 (2). pp. 147-157. Fauna Article PeerReviewed 2015 ftarcticportal 2023-11-01T23:54:37Z The effect of ultraviolet (UV) radiation on marine organisms has been an important focus of recent research, with depletion of the ozone layer resulting in increased UV radiation at high latitudes. Several studies have identified negative impacts of UV radiation on the biology of zooplanktonic organisms. This study used the RNA/DNA ratio as a measure of stress in copepod assemblages from Fíldes Bay in Antarctica and Quintay Bay on the central coast of Chile, two areas with high UV radiation but different photobiologic histories. Controlled time-light experiments were performed with copepods from the two locations, exposing them to white light, UV light, or darkness. The results showed different responses to UV radiation. Copepods from Fíldes Bay showed a slow metabolic response to UV radiation after 4 and 8 h of exposure. Copepods from Quintay Bay showed a fast metabolic response after 4 h of exposure (4 orders of magnitude higher than that for Fíldes Bay copepods) followed by a rapid return toward baseline after 8 h of exposure. These different responses probably reflect the time the copepod assemblages have been exposed to increased UV radiation and the extent of adaptive stress responses to cope with that increased UV radiation. The results of this study show that the RNA/DNA ratio is a useful indicator of the physiologic status of marine organisms and is a useful tool to measure the effects of changing environmental conditions on marine ecosystems, such as those associated with global climate change. Article in Journal/Newspaper Advances in Polar Science Antarc* Antarctica Polar Science Polar Science Copepods Arctic Portal Library |
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Fauna Lagos, Paulo F. Valdés, M. Jesús Manríquez, Karen Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile |
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The effect of ultraviolet (UV) radiation on marine organisms has been an important focus of recent research, with depletion of the ozone layer resulting in increased UV radiation at high latitudes. Several studies have identified negative impacts of UV radiation on the biology of zooplanktonic organisms. This study used the RNA/DNA ratio as a measure of stress in copepod assemblages from Fíldes Bay in Antarctica and Quintay Bay on the central coast of Chile, two areas with high UV radiation but different photobiologic histories. Controlled time-light experiments were performed with copepods from the two locations, exposing them to white light, UV light, or darkness. The results showed different responses to UV radiation. Copepods from Fíldes Bay showed a slow metabolic response to UV radiation after 4 and 8 h of exposure. Copepods from Quintay Bay showed a fast metabolic response after 4 h of exposure (4 orders of magnitude higher than that for Fíldes Bay copepods) followed by a rapid return toward baseline after 8 h of exposure. These different responses probably reflect the time the copepod assemblages have been exposed to increased UV radiation and the extent of adaptive stress responses to cope with that increased UV radiation. The results of this study show that the RNA/DNA ratio is a useful indicator of the physiologic status of marine organisms and is a useful tool to measure the effects of changing environmental conditions on marine ecosystems, such as those associated with global climate change. |
format |
Article in Journal/Newspaper |
author |
Lagos, Paulo F. Valdés, M. Jesús Manríquez, Karen |
author_facet |
Lagos, Paulo F. Valdés, M. Jesús Manríquez, Karen |
author_sort |
Lagos, Paulo F. |
title |
Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile |
title_short |
Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile |
title_full |
Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile |
title_fullStr |
Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile |
title_full_unstemmed |
Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile |
title_sort |
effects of uv radiation on the rna/dna ratio of copepods from antarctica and chile |
publisher |
Polar Research Institute of China - PRIC |
publishDate |
2015 |
url |
http://library.arcticportal.org/2569/ http://library.arcticportal.org/2569/1/A20150204.pdf |
genre |
Advances in Polar Science Antarc* Antarctica Polar Science Polar Science Copepods |
genre_facet |
Advances in Polar Science Antarc* Antarctica Polar Science Polar Science Copepods |
op_relation |
http://library.arcticportal.org/2569/1/A20150204.pdf Lagos, Paulo F. and Valdés, M. Jesús and Manríquez, Karen (2015) Effects of UV radiation on the RNA/DNA ratio of Copepods from Antarctica and Chile. Advances in Polar Science, 26 (2). pp. 147-157. |
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