Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica
In Potter Cove, Antarctica, newly ice-free areas appeared due to glacial retreat. Simultaneously, the inflow of sediment increased, reducing underwater photosynthetically active radiation (PAR, 400–700 nm). The aim of this study was to determine the photosynthetic characteristics of two macroalgal s...
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Online Access: | https://epic.awi.de/id/eprint/39536/ https://epic.awi.de/id/eprint/39536/1/Deregibus.pdf https://hdl.handle.net/10013/epic.46690 https://hdl.handle.net/10013/epic.46690.d001 |
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ftawi:oai:epic.awi.de:39536 2023-05-15T13:40:27+02:00 Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica Deregibus, Dolores Quartino, Maria Liliana Campana, Gabriela Laura Momo, Fernando Wiencke, Christian Zacher, Katharina 2016 application/pdf https://epic.awi.de/id/eprint/39536/ https://epic.awi.de/id/eprint/39536/1/Deregibus.pdf https://hdl.handle.net/10013/epic.46690 https://hdl.handle.net/10013/epic.46690.d001 unknown SPRINGER https://epic.awi.de/id/eprint/39536/1/Deregibus.pdf https://hdl.handle.net/10013/epic.46690.d001 Deregibus, D. , Quartino, M. L. , Campana, G. L. , Momo, F. , Wiencke, C. and Zacher, K. orcid:0000-0001-8897-1255 (2016) Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica , Polar Biology, 39 (1), pp. 153-166 . doi:10.1007/s00300-015-1679-y <https://doi.org/10.1007/s00300-015-1679-y> , hdl:10013/epic.46690 info:eu-repo/semantics/openAccess EPIC3Polar Biology, SPRINGER, 39(1), pp. 153-166 Article isiRev info:eu-repo/semantics/article 2016 ftawi https://doi.org/10.1007/s00300-015-1679-y 2021-12-24T15:41:02Z In Potter Cove, Antarctica, newly ice-free areas appeared due to glacial retreat. Simultaneously, the inflow of sediment increased, reducing underwater photosynthetically active radiation (PAR, 400–700 nm). The aim of this study was to determine the photosynthetic characteristics of two macroalgal species colonizing three newly icefree areas, A1, A2 and A3, with increasing degree of glacial influence from A1 to A3. Turbidity, salinity and temperature were measured, and light attenuation coefficients (Kd) calculated and considered as a proxy for glacial sediment input. The lower depth distribution of the red alga Palmaria decipiens and the brown alga Himantothallus grandifolius was 10 m in A3, 20 m in A2 and 30 m in A1. Both species were then collected, at 5 and 10 m at all areas. Photosynthetic parameters and the daily metabolic carbon balance (CB) were determined. Kd was significantly higher in A3 compared with A1 and A2. The CB of P. decipiens was significantly higher in A1 followed by A2 and A3, and significantly higher at shallower than at greater depth. For H. grandifolius CB was significantly lower in A3 and in A2 at deeper depths compared with the rest of areas and depths. The lower distribution limit of the algae was positively correlated to the light penetration. An increase in the sediment run-off due to global warming might lead to an elevation of the lower depth distribution limit but retreating glaciers can open new space for macroalgal colonization. These changes will probably affect macroalgal primary productivity in Potter Cove with consequences for the coastal ecosystem. Article in Journal/Newspaper Antarc* Antarctica Polar Biology South Shetland Islands Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) South Shetland Islands Potter Cove Polar Biology 39 1 153 166 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In Potter Cove, Antarctica, newly ice-free areas appeared due to glacial retreat. Simultaneously, the inflow of sediment increased, reducing underwater photosynthetically active radiation (PAR, 400–700 nm). The aim of this study was to determine the photosynthetic characteristics of two macroalgal species colonizing three newly icefree areas, A1, A2 and A3, with increasing degree of glacial influence from A1 to A3. Turbidity, salinity and temperature were measured, and light attenuation coefficients (Kd) calculated and considered as a proxy for glacial sediment input. The lower depth distribution of the red alga Palmaria decipiens and the brown alga Himantothallus grandifolius was 10 m in A3, 20 m in A2 and 30 m in A1. Both species were then collected, at 5 and 10 m at all areas. Photosynthetic parameters and the daily metabolic carbon balance (CB) were determined. Kd was significantly higher in A3 compared with A1 and A2. The CB of P. decipiens was significantly higher in A1 followed by A2 and A3, and significantly higher at shallower than at greater depth. For H. grandifolius CB was significantly lower in A3 and in A2 at deeper depths compared with the rest of areas and depths. The lower distribution limit of the algae was positively correlated to the light penetration. An increase in the sediment run-off due to global warming might lead to an elevation of the lower depth distribution limit but retreating glaciers can open new space for macroalgal colonization. These changes will probably affect macroalgal primary productivity in Potter Cove with consequences for the coastal ecosystem. |
format |
Article in Journal/Newspaper |
author |
Deregibus, Dolores Quartino, Maria Liliana Campana, Gabriela Laura Momo, Fernando Wiencke, Christian Zacher, Katharina |
spellingShingle |
Deregibus, Dolores Quartino, Maria Liliana Campana, Gabriela Laura Momo, Fernando Wiencke, Christian Zacher, Katharina Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica |
author_facet |
Deregibus, Dolores Quartino, Maria Liliana Campana, Gabriela Laura Momo, Fernando Wiencke, Christian Zacher, Katharina |
author_sort |
Deregibus, Dolores |
title |
Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica |
title_short |
Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica |
title_full |
Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica |
title_fullStr |
Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica |
title_full_unstemmed |
Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica |
title_sort |
photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in potter cove, south shetland islands, antarctica |
publisher |
SPRINGER |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/39536/ https://epic.awi.de/id/eprint/39536/1/Deregibus.pdf https://hdl.handle.net/10013/epic.46690 https://hdl.handle.net/10013/epic.46690.d001 |
geographic |
South Shetland Islands Potter Cove |
geographic_facet |
South Shetland Islands Potter Cove |
genre |
Antarc* Antarctica Polar Biology South Shetland Islands |
genre_facet |
Antarc* Antarctica Polar Biology South Shetland Islands |
op_source |
EPIC3Polar Biology, SPRINGER, 39(1), pp. 153-166 |
op_relation |
https://epic.awi.de/id/eprint/39536/1/Deregibus.pdf https://hdl.handle.net/10013/epic.46690.d001 Deregibus, D. , Quartino, M. L. , Campana, G. L. , Momo, F. , Wiencke, C. and Zacher, K. orcid:0000-0001-8897-1255 (2016) Photosynthetic light requirements and vertical distribution of macroalgae in newly ice-free areas in Potter Cove, South Shetland Islands, Antarctica , Polar Biology, 39 (1), pp. 153-166 . doi:10.1007/s00300-015-1679-y <https://doi.org/10.1007/s00300-015-1679-y> , hdl:10013/epic.46690 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00300-015-1679-y |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
1 |
container_start_page |
153 |
op_container_end_page |
166 |
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1766134844053520384 |