Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta
Ocean acidification affects with special intensity Arctic ecosystems, being marine photosynthetic organisms a primary target, although the consequences of this process in the carbon fluxes of Arctic algae are still unknown. The alteration of the cellular carbon balance due to physiological acclimati...
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ftawi:oai:epic.awi.de:43643 2024-09-15T17:51:20+00:00 Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta Iñiguez, Concepción Carmona, Raquel Lorenzo, M. Rosario Niell, F. Xavier Wiencke, Christian Gordillo, Francisco J.L. 2016-11 https://epic.awi.de/id/eprint/43643/ https://hdl.handle.net/10013/epic.49942 unknown SPRINGER Iñiguez, C. , Carmona, R. , Lorenzo, M. R. , Niell, F. X. , Wiencke, C. and Gordillo, F. J. (2016) Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta , Polar Biology, 39 (11), pp. 1993-2007 . doi:10.1007/s00300-015-1724-x <https://doi.org/10.1007/s00300-015-1724-x> , hdl:10013/epic.49942 EPIC3Polar Biology, SPRINGER, 39(11), pp. 1993-2007, ISSN: 0722-4060 Article isiRev 2016 ftawi https://doi.org/10.1007/s00300-015-1724-x 2024-06-24T04:16:35Z Ocean acidification affects with special intensity Arctic ecosystems, being marine photosynthetic organisms a primary target, although the consequences of this process in the carbon fluxes of Arctic algae are still unknown. The alteration of the cellular carbon balance due to physiological acclimation to an increased CO2 concentration (1300 ppm) in the common Arctic brown seaweeds Desmarestia aculeata and Alaria esculenta from Kongsfjorden (Svalbard) was analysed. Growth rate of D. aculeata was negatively affected by CO2 enrichment, while A. esculenta was positively affected, as a result of a different reorganization of the cellular carbon budget in both species. Desmarestia aculeata showed increased respiration, enhanced accumulation of storage biomolecules and elevated release of dissolved organic carbon, whereas A. esculenta showed decreased respiration and lower accumulation of storage biomolecules. Gross photosynthesis (measured both as O2 evolution and 14C fixation) was not affected in any of them, suggesting that photosynthesis was already saturated at normal CO2 conditions and did not participate in the acclimation response. However, electron transport rate changed in both species in opposite directions, indicating different energy requirements between treatments and species specificity. High CO2 levels also affected the N-metabolism, and 13C isotopic discrimination values from algal tissue pointed to a deactivation of carbon concentrating mechanisms. Since increased CO2 has the potential to modify physiological mechanisms in different ways in the species studied, it is expected that this may lead to changes in the Arctic seaweed community, which may propagate to the rest of the food web. Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Ocean acidification Polar Biology Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Polar Biology 39 11 1979 1991 |
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 |
Ocean acidification affects with special intensity Arctic ecosystems, being marine photosynthetic organisms a primary target, although the consequences of this process in the carbon fluxes of Arctic algae are still unknown. The alteration of the cellular carbon balance due to physiological acclimation to an increased CO2 concentration (1300 ppm) in the common Arctic brown seaweeds Desmarestia aculeata and Alaria esculenta from Kongsfjorden (Svalbard) was analysed. Growth rate of D. aculeata was negatively affected by CO2 enrichment, while A. esculenta was positively affected, as a result of a different reorganization of the cellular carbon budget in both species. Desmarestia aculeata showed increased respiration, enhanced accumulation of storage biomolecules and elevated release of dissolved organic carbon, whereas A. esculenta showed decreased respiration and lower accumulation of storage biomolecules. Gross photosynthesis (measured both as O2 evolution and 14C fixation) was not affected in any of them, suggesting that photosynthesis was already saturated at normal CO2 conditions and did not participate in the acclimation response. However, electron transport rate changed in both species in opposite directions, indicating different energy requirements between treatments and species specificity. High CO2 levels also affected the N-metabolism, and 13C isotopic discrimination values from algal tissue pointed to a deactivation of carbon concentrating mechanisms. Since increased CO2 has the potential to modify physiological mechanisms in different ways in the species studied, it is expected that this may lead to changes in the Arctic seaweed community, which may propagate to the rest of the food web. |
format |
Article in Journal/Newspaper |
author |
Iñiguez, Concepción Carmona, Raquel Lorenzo, M. Rosario Niell, F. Xavier Wiencke, Christian Gordillo, Francisco J.L. |
spellingShingle |
Iñiguez, Concepción Carmona, Raquel Lorenzo, M. Rosario Niell, F. Xavier Wiencke, Christian Gordillo, Francisco J.L. Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta |
author_facet |
Iñiguez, Concepción Carmona, Raquel Lorenzo, M. Rosario Niell, F. Xavier Wiencke, Christian Gordillo, Francisco J.L. |
author_sort |
Iñiguez, Concepción |
title |
Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta |
title_short |
Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta |
title_full |
Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta |
title_fullStr |
Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta |
title_full_unstemmed |
Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta |
title_sort |
increased co2 modifies the carbon balance and the photosynthetic yield of two common arctic brown seaweeds: desmarestia aculeata and alaria esculenta |
publisher |
SPRINGER |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/43643/ https://hdl.handle.net/10013/epic.49942 |
genre |
Arctic Kongsfjord* Kongsfjorden Ocean acidification Polar Biology Svalbard |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Ocean acidification Polar Biology Svalbard |
op_source |
EPIC3Polar Biology, SPRINGER, 39(11), pp. 1993-2007, ISSN: 0722-4060 |
op_relation |
Iñiguez, C. , Carmona, R. , Lorenzo, M. R. , Niell, F. X. , Wiencke, C. and Gordillo, F. J. (2016) Increased CO2 modifies the carbon balance and the photosynthetic yield of two common Arctic brown seaweeds: Desmarestia aculeata and Alaria esculenta , Polar Biology, 39 (11), pp. 1993-2007 . doi:10.1007/s00300-015-1724-x <https://doi.org/10.1007/s00300-015-1724-x> , hdl:10013/epic.49942 |
op_doi |
https://doi.org/10.1007/s00300-015-1724-x |
container_title |
Polar Biology |
container_volume |
39 |
container_issue |
11 |
container_start_page |
1979 |
op_container_end_page |
1991 |
_version_ |
1810293210269876224 |