Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future
Abstract text: The Polar ecosystems are among those more threatened by the changing climate. The increase in temperature in the Arctic is being particularly alarming. Hardbottom polar coastal areas are densely populated by macroalgae, many of which are present even during the long winter period. A n...
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ftunivmalaga:oai:riuma.uma.es:10630/18437 2023-05-15T15:12:41+02:00 Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future López-Gordillo, Francisco Javier 2019 https://hdl.handle.net/10630/18437 eng eng 7th European Phycological Congress Zagreb, Croacia 25/082019 a 29/08/2019 https://hdl.handle.net/10630/18437 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional CC-BY-NC-ND Algas marinas - Ártico Ártico - Aspectos ambientales Calentamiento global Seaweeds Polar Climate Change info:eu-repo/semantics/conferenceObject 2019 ftunivmalaga 2023-02-15T00:53:47Z Abstract text: The Polar ecosystems are among those more threatened by the changing climate. The increase in temperature in the Arctic is being particularly alarming. Hardbottom polar coastal areas are densely populated by macroalgae, many of which are present even during the long winter period. A number of campaigns have been carried out in Kongsfjorden (Svalbard), and common macroalgae species have been tested for their ability to perform in an increased atmospheric CO2 and/or increased temperature scenario. We have shown that increased CO2 can modify the carbon balance of different species in different ways, affecting both their ability to cope with summer excess light and their internal composition, in a manner different to their cold-temperate ecotypes (North Atlantic). But the new weather conditions are also threatening their ability to overcome long dark winter periods, compromising the interannual survival. An increase in winter temperature of 4 C doubles the speed of thallus degradation and suppress the ability to generate new photosynthetic tissue. Taking into account that in western Svalbard the increase in winter temperature is about 3.6 C per decade, we might be close to see a drastic change in the community. Primary production has been measured by three different methods (O2 evolution, 14C fixation and PAM fluorometry), so uncoupling of photosynthetic processes have been revealed as part of the acclimation mechanisms. These adjustments allowed for the internal composition (carbohydrates, lipids and proteins) and growth being more resilient to the changing environment, so that acclimation is mainly taking part in the photosynthetic machinery. Photoinhibitory conditions occurring during the 24 h illumination during summer may explain some seasonal traits in these species. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Conference Object Arctic Climate change Kongsfjord* Kongsfjorden North Atlantic Svalbard RIUMA - Repositorio Institucional de la Universidad de Málaga Arctic Svalbard |
institution |
Open Polar |
collection |
RIUMA - Repositorio Institucional de la Universidad de Málaga |
op_collection_id |
ftunivmalaga |
language |
English |
topic |
Algas marinas - Ártico Ártico - Aspectos ambientales Calentamiento global Seaweeds Polar Climate Change |
spellingShingle |
Algas marinas - Ártico Ártico - Aspectos ambientales Calentamiento global Seaweeds Polar Climate Change López-Gordillo, Francisco Javier Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future |
topic_facet |
Algas marinas - Ártico Ártico - Aspectos ambientales Calentamiento global Seaweeds Polar Climate Change |
description |
Abstract text: The Polar ecosystems are among those more threatened by the changing climate. The increase in temperature in the Arctic is being particularly alarming. Hardbottom polar coastal areas are densely populated by macroalgae, many of which are present even during the long winter period. A number of campaigns have been carried out in Kongsfjorden (Svalbard), and common macroalgae species have been tested for their ability to perform in an increased atmospheric CO2 and/or increased temperature scenario. We have shown that increased CO2 can modify the carbon balance of different species in different ways, affecting both their ability to cope with summer excess light and their internal composition, in a manner different to their cold-temperate ecotypes (North Atlantic). But the new weather conditions are also threatening their ability to overcome long dark winter periods, compromising the interannual survival. An increase in winter temperature of 4 C doubles the speed of thallus degradation and suppress the ability to generate new photosynthetic tissue. Taking into account that in western Svalbard the increase in winter temperature is about 3.6 C per decade, we might be close to see a drastic change in the community. Primary production has been measured by three different methods (O2 evolution, 14C fixation and PAM fluorometry), so uncoupling of photosynthetic processes have been revealed as part of the acclimation mechanisms. These adjustments allowed for the internal composition (carbohydrates, lipids and proteins) and growth being more resilient to the changing environment, so that acclimation is mainly taking part in the photosynthetic machinery. Photoinhibitory conditions occurring during the 24 h illumination during summer may explain some seasonal traits in these species. Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. |
format |
Conference Object |
author |
López-Gordillo, Francisco Javier |
author_facet |
López-Gordillo, Francisco Javier |
author_sort |
López-Gordillo, Francisco Javier |
title |
Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future |
title_short |
Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future |
title_full |
Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future |
title_fullStr |
Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future |
title_full_unstemmed |
Performance of polar macroalgae in a changing environment: A seasonal perspective and implications for the future |
title_sort |
performance of polar macroalgae in a changing environment: a seasonal perspective and implications for the future |
publishDate |
2019 |
url |
https://hdl.handle.net/10630/18437 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Climate change Kongsfjord* Kongsfjorden North Atlantic Svalbard |
genre_facet |
Arctic Climate change Kongsfjord* Kongsfjorden North Atlantic Svalbard |
op_relation |
7th European Phycological Congress Zagreb, Croacia 25/082019 a 29/08/2019 https://hdl.handle.net/10630/18437 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766343332243439616 |