210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef
Here we show the use of the 210Pb-226Ra excess method to determine the growth rate of two corals from the world's largest known cold-water coral reef, Røst Reef, north of the Arctic circle off Norway. Colonies of each of the two species that build the reef, Lophelia pertusa and Madrepora oculat...
Published in: | Biogeosciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications (EGU)
2012
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Online Access: | https://oceanrep.geomar.de/id/eprint/38438/ https://oceanrep.geomar.de/id/eprint/38438/1/bg-9-1253-2012.pdf https://doi.org/10.5194/bg-9-1253-2012 |
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ftoceanrep:oai:oceanrep.geomar.de:38438 2023-05-15T15:11:32+02:00 210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef Sabatier, P. Reyss, J.-L. Hall-Spencer, J. M. Colin, C. Frank, N. Tisnérat-Laborde, N. Bordier, L. Douville, E. 2012 text https://oceanrep.geomar.de/id/eprint/38438/ https://oceanrep.geomar.de/id/eprint/38438/1/bg-9-1253-2012.pdf https://doi.org/10.5194/bg-9-1253-2012 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/38438/1/bg-9-1253-2012.pdf Sabatier, P., Reyss, J. L., Hall-Spencer, J. M., Colin, C., Frank, N., Tisnérat-Laborde, N., Bordier, L. and Douville, E. (2012) 210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef. Open Access Biogeosciences (BG), 9 (3). pp. 1253-1265. DOI 10.5194/bg-9-1253-2012 <https://doi.org/10.5194/bg-9-1253-2012>. doi:10.5194/bg-9-1253-2012 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2012 ftoceanrep https://doi.org/10.5194/bg-9-1253-2012 2023-04-07T15:34:04Z Here we show the use of the 210Pb-226Ra excess method to determine the growth rate of two corals from the world's largest known cold-water coral reef, Røst Reef, north of the Arctic circle off Norway. Colonies of each of the two species that build the reef, Lophelia pertusa and Madrepora oculata, were collected alive at 350 m depth using a submersible. Pb and Ra isotopes were measured along the major growth axis of both specimens using low level alpha and gamma spectrometry and trace element compositions were studied. 210Pb and 226Ra differ in the way they are incorporated into coral skeletons. Hence, to assess growth rates, we considered the exponential decrease of initially incorporated 210Pb, as well as the increase in 210Pb from the decay of 226Ra and contamination with 210Pb associated with Mn-Fe coatings that we were unable to remove completely from the oldest parts of the skeletons. 226Ra activity was similar in both coral species, so, assuming constant uptake of 210Pb through time, we used the 210Pb-226Ra chronology to calculate growth rates. The 45.5 cm long branch of M. oculata was 31 yr with an average linear growth rate of 14.4 ± 1.1 mm yr−1 (2.6 polyps per year). Despite cleaning, a correction for Mn-Fe oxide contamination was required for the oldest part of the colony; this correction corroborated our radiocarbon date of 40 yr and a mean growth rate of 2 polyps yr−1. This rate is similar to the one obtained in aquarium experiments under optimal growth conditions. Article in Journal/Newspaper Arctic Lophelia pertusa OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Norway Røst ENVELOPE(11.983,11.983,67.467,67.467) Biogeosciences 9 3 1253 1265 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Here we show the use of the 210Pb-226Ra excess method to determine the growth rate of two corals from the world's largest known cold-water coral reef, Røst Reef, north of the Arctic circle off Norway. Colonies of each of the two species that build the reef, Lophelia pertusa and Madrepora oculata, were collected alive at 350 m depth using a submersible. Pb and Ra isotopes were measured along the major growth axis of both specimens using low level alpha and gamma spectrometry and trace element compositions were studied. 210Pb and 226Ra differ in the way they are incorporated into coral skeletons. Hence, to assess growth rates, we considered the exponential decrease of initially incorporated 210Pb, as well as the increase in 210Pb from the decay of 226Ra and contamination with 210Pb associated with Mn-Fe coatings that we were unable to remove completely from the oldest parts of the skeletons. 226Ra activity was similar in both coral species, so, assuming constant uptake of 210Pb through time, we used the 210Pb-226Ra chronology to calculate growth rates. The 45.5 cm long branch of M. oculata was 31 yr with an average linear growth rate of 14.4 ± 1.1 mm yr−1 (2.6 polyps per year). Despite cleaning, a correction for Mn-Fe oxide contamination was required for the oldest part of the colony; this correction corroborated our radiocarbon date of 40 yr and a mean growth rate of 2 polyps yr−1. This rate is similar to the one obtained in aquarium experiments under optimal growth conditions. |
format |
Article in Journal/Newspaper |
author |
Sabatier, P. Reyss, J.-L. Hall-Spencer, J. M. Colin, C. Frank, N. Tisnérat-Laborde, N. Bordier, L. Douville, E. |
spellingShingle |
Sabatier, P. Reyss, J.-L. Hall-Spencer, J. M. Colin, C. Frank, N. Tisnérat-Laborde, N. Bordier, L. Douville, E. 210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef |
author_facet |
Sabatier, P. Reyss, J.-L. Hall-Spencer, J. M. Colin, C. Frank, N. Tisnérat-Laborde, N. Bordier, L. Douville, E. |
author_sort |
Sabatier, P. |
title |
210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef |
title_short |
210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef |
title_full |
210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef |
title_fullStr |
210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef |
title_full_unstemmed |
210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef |
title_sort |
210pb-226ra chronology reveals rapid growth rate of madrepora oculata and lophelia pertusa on world's largest cold-water coral reef |
publisher |
Copernicus Publications (EGU) |
publishDate |
2012 |
url |
https://oceanrep.geomar.de/id/eprint/38438/ https://oceanrep.geomar.de/id/eprint/38438/1/bg-9-1253-2012.pdf https://doi.org/10.5194/bg-9-1253-2012 |
long_lat |
ENVELOPE(11.983,11.983,67.467,67.467) |
geographic |
Arctic Norway Røst |
geographic_facet |
Arctic Norway Røst |
genre |
Arctic Lophelia pertusa |
genre_facet |
Arctic Lophelia pertusa |
op_relation |
https://oceanrep.geomar.de/id/eprint/38438/1/bg-9-1253-2012.pdf Sabatier, P., Reyss, J. L., Hall-Spencer, J. M., Colin, C., Frank, N., Tisnérat-Laborde, N., Bordier, L. and Douville, E. (2012) 210Pb-226Ra chronology reveals rapid growth rate of Madrepora oculata and Lophelia pertusa on world's largest cold-water coral reef. Open Access Biogeosciences (BG), 9 (3). pp. 1253-1265. DOI 10.5194/bg-9-1253-2012 <https://doi.org/10.5194/bg-9-1253-2012>. doi:10.5194/bg-9-1253-2012 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-9-1253-2012 |
container_title |
Biogeosciences |
container_volume |
9 |
container_issue |
3 |
container_start_page |
1253 |
op_container_end_page |
1265 |
_version_ |
1766342373009260544 |