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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Norwegian Polar Institute
2021
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Online Access: | https://doi.org/10.33265/polar.v40.5702 https://doaj.org/article/17d249dbc36548bf84aa32c4ad898bf5 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:17d249dbc36548bf84aa32c4ad898bf5 2023-05-15T14:48:17+02:00 Differential acclimation responses to irradiance and temperature in two co-occurring seaweed species in Arctic fjords Johanna Marambio Kai Bischof 2021-12-01 https://doi.org/10.33265/polar.v40.5702 https://doaj.org/article/17d249dbc36548bf84aa32c4ad898bf5 en eng Norwegian Polar Institute 0800-0395 1751-8369 doi:10.33265/polar.v40.5702 https://doaj.org/article/17d249dbc36548bf84aa32c4ad898bf5 undefined Polar Research, Vol 40, Pp 1-14 (2021) arctic desmarestia aculeata palmaria palmata photosynthesis temperature irradiance envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.33265/polar.v40.5702 2023-01-22T18:19:22Z 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 Unknown Arctic Svalbard Polar Research 40 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
arctic desmarestia aculeata palmaria palmata photosynthesis temperature irradiance envir geo |
spellingShingle |
arctic desmarestia aculeata palmaria palmata photosynthesis temperature irradiance envir geo Johanna Marambio Kai Bischof 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 envir geo |
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 |
Johanna Marambio Kai Bischof |
author_facet |
Johanna Marambio Kai Bischof |
author_sort |
Johanna Marambio |
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 |
publisher |
Norwegian Polar Institute |
publishDate |
2021 |
url |
https://doi.org/10.33265/polar.v40.5702 https://doaj.org/article/17d249dbc36548bf84aa32c4ad898bf5 |
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, Vol 40, Pp 1-14 (2021) |
op_relation |
0800-0395 1751-8369 doi:10.33265/polar.v40.5702 https://doaj.org/article/17d249dbc36548bf84aa32c4ad898bf5 |
op_rights |
undefined |
op_doi |
https://doi.org/10.33265/polar.v40.5702 |
container_title |
Polar Research |
container_volume |
40 |
_version_ |
1766319377577148416 |