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...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2002
|
Subjects: | |
Online Access: | http://dx.doi.org/10.4319/lo.2002.47.3.0829 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2002.47.3.0829 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2002.47.3.0829 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2002.47.3.0829 |
id |
crwiley:10.4319/lo.2002.47.3.0829 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.4319/lo.2002.47.3.0829 2024-09-15T17:48:31+00:00 Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula Rocco, Vanina E. Oppezzo, Oscar Pizarro, Ramón Sommaruga, Ruben Ferraro, Marcela Zagarese, Horacio E. 2002 http://dx.doi.org/10.4319/lo.2002.47.3.0829 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2002.47.3.0829 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2002.47.3.0829 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2002.47.3.0829 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 47, issue 3, page 829-836 ISSN 0024-3590 1939-5590 journal-article 2002 crwiley https://doi.org/10.4319/lo.2002.47.3.0829 2024-06-25T04:10:53Z 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 distribution); (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 (LD 50 = 2.2–2.78 J cm −2 ). 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 MAA concentration, as well as the lowest tolerance to artificial and natural UVR. These findings support the idea that UV tolerance in this species is related to the accumulation of MAAs. A comparison of the strategies used to cope with potentially damaging levels of UVR by different species of Boeckella indicates a high degree of plasticity in this genus, which has probably been key for its success to colonize a wide range of UV environments. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Copepods Wiley Online Library Limnology and Oceanography 47 3 829 836 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
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 distribution); (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 (LD 50 = 2.2–2.78 J cm −2 ). 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 MAA concentration, as well as the lowest tolerance to artificial and natural UVR. These findings support the idea that UV tolerance in this species is related to the accumulation of MAAs. A comparison of the strategies used to cope with potentially damaging levels of UVR by different species of Boeckella indicates a high degree of plasticity in this genus, which has probably been key for its success to colonize a wide range of UV environments. |
format |
Article in Journal/Newspaper |
author |
Rocco, Vanina E. Oppezzo, Oscar Pizarro, Ramón Sommaruga, Ruben Ferraro, Marcela Zagarese, Horacio E. |
spellingShingle |
Rocco, Vanina E. Oppezzo, Oscar Pizarro, Ramón Sommaruga, Ruben Ferraro, Marcela Zagarese, Horacio E. Ultraviolet damage and counteracting mechanisms in the freshwater copepod Boeckella poppei from the Antarctic Peninsula |
author_facet |
Rocco, Vanina E. Oppezzo, Oscar Pizarro, Ramón Sommaruga, Ruben Ferraro, Marcela Zagarese, Horacio E. |
author_sort |
Rocco, Vanina E. |
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 |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.4319/lo.2002.47.3.0829 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2002.47.3.0829 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2002.47.3.0829 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2002.47.3.0829 |
genre |
Antarc* Antarctic Antarctic Peninsula Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Copepods |
op_source |
Limnology and Oceanography volume 47, issue 3, page 829-836 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2002.47.3.0829 |
container_title |
Limnology and Oceanography |
container_volume |
47 |
container_issue |
3 |
container_start_page |
829 |
op_container_end_page |
836 |
_version_ |
1810289800065843200 |