Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords
Arctic fjord systems experience large amplitudes of change in temperature and radiation regime due to climate warming and the related decrease in sea ice. The resultant increase in irradiance entering the water column influences photosynthetic activity of benthic and pelagic primary producers. The s...
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ftzenodo:oai:zenodo.org:5930971 2023-05-15T14:48:21+02:00 Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords Marambio, Johanna Bischof, Kai 2021-12-21 https://zenodo.org/record/5930971 https://doi.org/10.33265/polar.v40.5702 unknown info:eu-repo/grantAgreement/EC/Horizon 2020 Framework Programme - Research and Innovation action/869154/ https://zenodo.org/communities/face-it https://zenodo.org/record/5930971 https://doi.org/10.33265/polar.v40.5702 oai:zenodo.org:5930971 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Polar Research 40 5702 Arctic Desmarestia aculeata Palmaria palmata photosynthesis temperature irradiance info:eu-repo/semantics/article publication-article 2021 ftzenodo https://doi.org/10.33265/polar.v40.5702 2023-03-11T02:28:08Z Arctic fjord systems experience large amplitudes of change in temperature and radiation regime due to climate warming and the related decrease in sea ice. The resultant increase in irradiance entering the water column influences photosynthetic activity of benthic and pelagic primary producers. The subtidal brown alga Desmarestia aculeata and the intertidal red alga Palmaria palmata populate the cold-temperate coasts of the North Atlantic, reaching the polar zone. To evaluate their acclimation potential, we collected both species in Kongsfjorden, Svalbard (78.9°N, 11.9°E), during the Arctic summer and exposed specimens to two different PAR levels (50 and 500 μmol photons m−2 s−1) and temperatures (0, 4 and 8 °C) for 21 days. Photosynthetic parameters and biochemical features (pigment concentration and antioxidants) were assessed. In general, high irradiance was the factor that generated a negative effect for D. aculeata and P. palmata in the photosynthetic parameters of the photosynthesis–irradiance curve and Fv/Fm. The pigment concentration in both species tended to decrease with increasing irradiance. Antioxidant level showed different trends for both species: in D. aculeata, antioxidant potential increased with high irradiance and temperature, while in P. palmata, it only increased with high irradiance. Both species showed responses to the interaction of irradiance and temperature, although D. aculeata was more sensitive to high irradiance than P. palmata. Our study shows how these species, which have similar geographical distribution in the North Atlantic and the Arctic but belong to different taxonomic lineages, have similar strategies of acclimation, although they respond differently to ecophysiological parameters. Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden North Atlantic Polar Research Sea ice Svalbard Zenodo Arctic Svalbard Polar Research 40 |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Arctic Desmarestia aculeata Palmaria palmata photosynthesis temperature irradiance |
spellingShingle |
Arctic Desmarestia aculeata Palmaria palmata photosynthesis temperature irradiance Marambio, Johanna Bischof, Kai Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords |
topic_facet |
Arctic Desmarestia aculeata Palmaria palmata photosynthesis temperature irradiance |
description |
Arctic fjord systems experience large amplitudes of change in temperature and radiation regime due to climate warming and the related decrease in sea ice. The resultant increase in irradiance entering the water column influences photosynthetic activity of benthic and pelagic primary producers. The subtidal brown alga Desmarestia aculeata and the intertidal red alga Palmaria palmata populate the cold-temperate coasts of the North Atlantic, reaching the polar zone. To evaluate their acclimation potential, we collected both species in Kongsfjorden, Svalbard (78.9°N, 11.9°E), during the Arctic summer and exposed specimens to two different PAR levels (50 and 500 μmol photons m−2 s−1) and temperatures (0, 4 and 8 °C) for 21 days. Photosynthetic parameters and biochemical features (pigment concentration and antioxidants) were assessed. In general, high irradiance was the factor that generated a negative effect for D. aculeata and P. palmata in the photosynthetic parameters of the photosynthesis–irradiance curve and Fv/Fm. The pigment concentration in both species tended to decrease with increasing irradiance. Antioxidant level showed different trends for both species: in D. aculeata, antioxidant potential increased with high irradiance and temperature, while in P. palmata, it only increased with high irradiance. Both species showed responses to the interaction of irradiance and temperature, although D. aculeata was more sensitive to high irradiance than P. palmata. Our study shows how these species, which have similar geographical distribution in the North Atlantic and the Arctic but belong to different taxonomic lineages, have similar strategies of acclimation, although they respond differently to ecophysiological parameters. |
format |
Article in Journal/Newspaper |
author |
Marambio, Johanna Bischof, Kai |
author_facet |
Marambio, Johanna Bischof, Kai |
author_sort |
Marambio, Johanna |
title |
Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords |
title_short |
Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords |
title_full |
Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords |
title_fullStr |
Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords |
title_full_unstemmed |
Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords |
title_sort |
differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in arctic fjords |
publishDate |
2021 |
url |
https://zenodo.org/record/5930971 https://doi.org/10.33265/polar.v40.5702 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Kongsfjord* Kongsfjorden North Atlantic Polar Research Sea ice Svalbard |
genre_facet |
Arctic Kongsfjord* Kongsfjorden North Atlantic Polar Research Sea ice Svalbard |
op_source |
Polar Research 40 5702 |
op_relation |
info:eu-repo/grantAgreement/EC/Horizon 2020 Framework Programme - Research and Innovation action/869154/ https://zenodo.org/communities/face-it https://zenodo.org/record/5930971 https://doi.org/10.33265/polar.v40.5702 oai:zenodo.org:5930971 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.33265/polar.v40.5702 |
container_title |
Polar Research |
container_volume |
40 |
_version_ |
1766319433520775168 |