Net heterotrophy in High Arctic first-year and multi-year spring sea ice
The net productivity of sea ice is determined by the physical and geochemical characteristics of the ice–ocean system and the activity of organisms inhabiting the ice. Differences in habitat suitability between first-year and multi-year sea ice can affect the ice algal community composition and accl...
Published in: | Elementa: Science of the Anthropocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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University of California Press
2022
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Online Access: | https://hdl.handle.net/10037/24644 https://doi.org/10.1525/elementa.2021.00040 |
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ftunivtroemsoe:oai:munin.uit.no:10037/24644 2023-05-15T14:25:54+02:00 Net heterotrophy in High Arctic first-year and multi-year spring sea ice Campbell, Karley Lange, Benjamin Landy, Jack Christopher Katlein, Christian Nicolaus, Marcel Anhaus, Philipp Matero, Ilkka Gradinger, Rolf Charette, Joannie Duerksen, Steven Tremblay, Pascal Rysgaard, Søren Tranter, Martyn Haas, Christian Michel, Christine 2022-01-04 https://hdl.handle.net/10037/24644 https://doi.org/10.1525/elementa.2021.00040 eng eng University of California Press Elementa: Science of the Anthropocene Campbell KL, Lange, Landy, Katlein, Nicolaus, Anhaus, Matero, Gradinger, Charette, Duerksen, Tremblay, Rysgaard, Tranter, Haas, Michel. Net heterotrophy in High Arctic first-year and multi-year spring sea ice. Elementa: Science of the Anthropocene. 2022;10(1) FRIDAID 1966372 doi:10.1525/elementa.2021.00040 2325-1026 https://hdl.handle.net/10037/24644 openAccess Copyright 2022 The Author(s) VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 Oseanografi / Oceanography Sjøis / Sea ice Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.1525/elementa.2021.00040 2022-03-30T22:58:17Z The net productivity of sea ice is determined by the physical and geochemical characteristics of the ice–ocean system and the activity of organisms inhabiting the ice. Differences in habitat suitability between first-year and multi-year sea ice can affect the ice algal community composition and acclimation state, introducing considerable variability to primary production within each ice type. In this study, we characterized the biogeochemical variability between adjacent first-year and multi-year sea ice floes in the Lincoln Sea of the Canadian High Arctic, during the May 2018 Multidisciplinary Arctic Program—Last Ice sampling campaign. Combining measurements of transmitted irradiance from a remotely operated underwater vehicle with laboratory-based oxygen optode incubations, this work shows widespread heterotrophy (net oxygen uptake) in the bottom 10 cm of both ice types, particularly in thick multi-year ice (>2.4 m) and early morning of the 24-h day. Algal acclimation state and species composition varied between ice types despite similar net community production due to widespread light and nutrient limitation. The first-year ice algal community was increasingly dominated over spring by the potentially toxin-producing genus Pseudonitzschia that was acclimated to high and variable light conditions characteristic of a thinner ice habitat with mobile snow cover. In comparison, the multi-year ice harbored more shade-acclimated algae of mixed composition.This work highlights the potential for heterotrophy in sea ice habitats of the High Arctic, including first measurements of such O 2 -uptake in multi-year ice floes. Observed differences in photophysiology between algae of these sea ice types suggests that a shift toward higher light availability and a younger sea ice cover with climate change does not necessarily result in a more productive system. Instead, it may favor future sea ice algal communities of different species composition, with lower photosynthetic potential but greater resilience to stronger and more variable light conditions. Article in Journal/Newspaper Arctic Arctic Climate change Lincoln Sea Sea ice University of Tromsø: Munin Open Research Archive Arctic Elementa: Science of the Anthropocene 10 1 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 Oseanografi / Oceanography Sjøis / Sea ice |
spellingShingle |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 Oseanografi / Oceanography Sjøis / Sea ice Campbell, Karley Lange, Benjamin Landy, Jack Christopher Katlein, Christian Nicolaus, Marcel Anhaus, Philipp Matero, Ilkka Gradinger, Rolf Charette, Joannie Duerksen, Steven Tremblay, Pascal Rysgaard, Søren Tranter, Martyn Haas, Christian Michel, Christine Net heterotrophy in High Arctic first-year and multi-year spring sea ice |
topic_facet |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Marine biology: 497 Oseanografi / Oceanography Sjøis / Sea ice |
description |
The net productivity of sea ice is determined by the physical and geochemical characteristics of the ice–ocean system and the activity of organisms inhabiting the ice. Differences in habitat suitability between first-year and multi-year sea ice can affect the ice algal community composition and acclimation state, introducing considerable variability to primary production within each ice type. In this study, we characterized the biogeochemical variability between adjacent first-year and multi-year sea ice floes in the Lincoln Sea of the Canadian High Arctic, during the May 2018 Multidisciplinary Arctic Program—Last Ice sampling campaign. Combining measurements of transmitted irradiance from a remotely operated underwater vehicle with laboratory-based oxygen optode incubations, this work shows widespread heterotrophy (net oxygen uptake) in the bottom 10 cm of both ice types, particularly in thick multi-year ice (>2.4 m) and early morning of the 24-h day. Algal acclimation state and species composition varied between ice types despite similar net community production due to widespread light and nutrient limitation. The first-year ice algal community was increasingly dominated over spring by the potentially toxin-producing genus Pseudonitzschia that was acclimated to high and variable light conditions characteristic of a thinner ice habitat with mobile snow cover. In comparison, the multi-year ice harbored more shade-acclimated algae of mixed composition.This work highlights the potential for heterotrophy in sea ice habitats of the High Arctic, including first measurements of such O 2 -uptake in multi-year ice floes. Observed differences in photophysiology between algae of these sea ice types suggests that a shift toward higher light availability and a younger sea ice cover with climate change does not necessarily result in a more productive system. Instead, it may favor future sea ice algal communities of different species composition, with lower photosynthetic potential but greater resilience to stronger and more variable light conditions. |
format |
Article in Journal/Newspaper |
author |
Campbell, Karley Lange, Benjamin Landy, Jack Christopher Katlein, Christian Nicolaus, Marcel Anhaus, Philipp Matero, Ilkka Gradinger, Rolf Charette, Joannie Duerksen, Steven Tremblay, Pascal Rysgaard, Søren Tranter, Martyn Haas, Christian Michel, Christine |
author_facet |
Campbell, Karley Lange, Benjamin Landy, Jack Christopher Katlein, Christian Nicolaus, Marcel Anhaus, Philipp Matero, Ilkka Gradinger, Rolf Charette, Joannie Duerksen, Steven Tremblay, Pascal Rysgaard, Søren Tranter, Martyn Haas, Christian Michel, Christine |
author_sort |
Campbell, Karley |
title |
Net heterotrophy in High Arctic first-year and multi-year spring sea ice |
title_short |
Net heterotrophy in High Arctic first-year and multi-year spring sea ice |
title_full |
Net heterotrophy in High Arctic first-year and multi-year spring sea ice |
title_fullStr |
Net heterotrophy in High Arctic first-year and multi-year spring sea ice |
title_full_unstemmed |
Net heterotrophy in High Arctic first-year and multi-year spring sea ice |
title_sort |
net heterotrophy in high arctic first-year and multi-year spring sea ice |
publisher |
University of California Press |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/24644 https://doi.org/10.1525/elementa.2021.00040 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Climate change Lincoln Sea Sea ice |
genre_facet |
Arctic Arctic Climate change Lincoln Sea Sea ice |
op_relation |
Elementa: Science of the Anthropocene Campbell KL, Lange, Landy, Katlein, Nicolaus, Anhaus, Matero, Gradinger, Charette, Duerksen, Tremblay, Rysgaard, Tranter, Haas, Michel. Net heterotrophy in High Arctic first-year and multi-year spring sea ice. Elementa: Science of the Anthropocene. 2022;10(1) FRIDAID 1966372 doi:10.1525/elementa.2021.00040 2325-1026 https://hdl.handle.net/10037/24644 |
op_rights |
openAccess Copyright 2022 The Author(s) |
op_doi |
https://doi.org/10.1525/elementa.2021.00040 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
10 |
container_issue |
1 |
_version_ |
1766298393030688768 |