Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula
The process of ozone depletion over the Antarctic continent has resulted in the increase of incident ultraviolet-B (UVB) radiation, whose effects may be damaging to living organisms. To counteract the negative effects of ultraviolet radiation (UVR), aquatic organisms may display one or more strategi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.578.2997 2023-05-15T13:31:07+02:00 Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula Vanina E. Rocco Ruben Sommaruga Marcela Ferraro Horacio E. Zagarese The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.2997 http://homepage.uibk.ac.at/~c71986/Rocco et al L %26 O 2002.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.2997 http://homepage.uibk.ac.at/~c71986/Rocco et al L %26 O 2002.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://homepage.uibk.ac.at/~c71986/Rocco et al L %26 O 2002.pdf text 2002 ftciteseerx 2016-01-08T12:51:22Z The process of ozone depletion over the Antarctic continent has resulted in the increase of incident ultraviolet-B (UVB) radiation, whose effects may be damaging to living organisms. To counteract the negative effects of ultraviolet radiation (UVR), aquatic organisms may display one or more strategies: (1) avoidance (i.e. deep distri-bution); (2) photoprotection through the use of ‘‘sunscreen’ ’ compounds, such as mycosporine-like amino acids (MAAs); and (3) enzymatic repair of the damage. The effects of UVR were assessed on four populations of the copepod Boeckella poppei from Antarctic lakes using laboratory and field experiments. The results were related to measurements of DNA enzymatic repair activity and MAA concentration. This is the first study that combines these measurements in zooplankton. Boeckella poppei was highly tolerant to UVR (LD50 5 2.2–2.78 J cm22). However, measurements of photorecovery (comparison of UVB mortality in the presence and absence of photoreactivating light) and dosage of photolyase activity indicated low rates of enzymatic repair, which may be the result of low temperatures typical of Antarctic lakes. Three different MAAs were identified, both in phytoplankton and copepods: porphyra-334, mycosporine-glycine, and shinorine. The population of B. poppei from Lake Boeckella had the lowest Text Antarc* Antarctic Antarctic Peninsula Copepods Unknown Antarctic Antarctic Peninsula Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) Lake Boeckella ENVELOPE(-57.000,-57.000,-63.400,-63.400) The Antarctic |
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Open Polar |
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ftciteseerx |
language |
English |
description |
The process of ozone depletion over the Antarctic continent has resulted in the increase of incident ultraviolet-B (UVB) radiation, whose effects may be damaging to living organisms. To counteract the negative effects of ultraviolet radiation (UVR), aquatic organisms may display one or more strategies: (1) avoidance (i.e. deep distri-bution); (2) photoprotection through the use of ‘‘sunscreen’ ’ compounds, such as mycosporine-like amino acids (MAAs); and (3) enzymatic repair of the damage. The effects of UVR were assessed on four populations of the copepod Boeckella poppei from Antarctic lakes using laboratory and field experiments. The results were related to measurements of DNA enzymatic repair activity and MAA concentration. This is the first study that combines these measurements in zooplankton. Boeckella poppei was highly tolerant to UVR (LD50 5 2.2–2.78 J cm22). However, measurements of photorecovery (comparison of UVB mortality in the presence and absence of photoreactivating light) and dosage of photolyase activity indicated low rates of enzymatic repair, which may be the result of low temperatures typical of Antarctic lakes. Three different MAAs were identified, both in phytoplankton and copepods: porphyra-334, mycosporine-glycine, and shinorine. The population of B. poppei from Lake Boeckella had the lowest |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Vanina E. Rocco Ruben Sommaruga Marcela Ferraro Horacio E. Zagarese |
spellingShingle |
Vanina E. Rocco Ruben Sommaruga Marcela Ferraro Horacio E. Zagarese Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula |
author_facet |
Vanina E. Rocco Ruben Sommaruga Marcela Ferraro Horacio E. Zagarese |
author_sort |
Vanina E. Rocco |
title |
Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula |
title_short |
Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula |
title_full |
Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula |
title_fullStr |
Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula |
title_full_unstemmed |
Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula |
title_sort |
ultraviolet damage and counteracting mechanisms in the freshwater copepod boeckella poppei from the antarctic peninsula |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.2997 http://homepage.uibk.ac.at/~c71986/Rocco et al L %26 O 2002.pdf |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) ENVELOPE(-57.000,-57.000,-63.400,-63.400) |
geographic |
Antarctic Antarctic Peninsula Boeckella Lake Boeckella The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Boeckella Lake Boeckella The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Copepods |
op_source |
http://homepage.uibk.ac.at/~c71986/Rocco et al L %26 O 2002.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.2997 http://homepage.uibk.ac.at/~c71986/Rocco et al L %26 O 2002.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766016053363605504 |