Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic
Source at https://doi.org/10.1002/lno.11043. In the Arctic, rising seawater temperatures and increasing underwater light caused by reductions in sea ice cover are expected to change the structure of arctic marine communities. Substantial, sometimes sudden, increases in macroalgal productivity and bi...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2018
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/15356 https://doi.org/10.1002/lno.11043 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/15356 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/15356 2023-05-15T14:26:46+02:00 Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic Scherrer, Kim Josefin Niklasdotter Kortsch, Susanne Varpe, Øystein Weyhenmeyer, Gesa Antonie Gulliksen, Bjørn Primicerio, Raul 2018-10-04 https://hdl.handle.net/10037/15356 https://doi.org/10.1002/lno.11043 eng eng Wiley Limnology and Oceanography Scherrer, K.J.N., Kortsch, S., Varpe, Ø., Weyhenmeyer, G.A., Gulliksen, B. & Primicerio, R. (2018). Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic. Limnology and Oceanography, 64 (1), 330-341. https://doi.org/10.1002/lno.11043 FRIDAID 1692065 doi:10.1002/lno.11043 0024-3590 1939-5590 https://hdl.handle.net/10037/15356 openAccess VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.1002/lno.11043 2021-06-25T17:56:33Z Source at https://doi.org/10.1002/lno.11043. In the Arctic, rising seawater temperatures and increasing underwater light caused by reductions in sea ice cover are expected to change the structure of arctic marine communities. Substantial, sometimes sudden, increases in macroalgal productivity and biomass have already been observed in arctic rocky bottom communities. These macroalgal responses have been attributed to increasing temperature and light, but the relative importance of the suggested drivers of change has not yet been assessed. In this study, we used a mechanistic competition model to unravel the effects of temperature and light on benthic community structure and algae dominance, focusing on key algae species: red calcareous algae and macroalgal fronds. We find that light is the primary driver of increases in macroalgal coverage, whereas increased seawater temperature plays a secondary role. Shifts leading to macroalgae dominated communities may be mediated by competitive interactions, and are likely due to three light-related processes: earlier sea ice break-out at high latitudes can result in an exponential increase in the cumulative amount of light that enters the water column during a year; threshold effect in light requirements for algal growth; and light requirements of calcareous algae being substantially lower than those of macroalgae. With continued warming, our modeling results suggest that reduced sea ice coverage and increased light availability will favor dominance of macroalgae, which due to their key ecological role are expected to alter the structure and functioning of arctic rocky bottom ecosystems. Article in Journal/Newspaper Arctic Arctic Sea ice University of Tromsø: Munin Open Research Archive Arctic Limnology and Oceanography 64 1 330 341 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Scherrer, Kim Josefin Niklasdotter Kortsch, Susanne Varpe, Øystein Weyhenmeyer, Gesa Antonie Gulliksen, Bjørn Primicerio, Raul Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
description |
Source at https://doi.org/10.1002/lno.11043. In the Arctic, rising seawater temperatures and increasing underwater light caused by reductions in sea ice cover are expected to change the structure of arctic marine communities. Substantial, sometimes sudden, increases in macroalgal productivity and biomass have already been observed in arctic rocky bottom communities. These macroalgal responses have been attributed to increasing temperature and light, but the relative importance of the suggested drivers of change has not yet been assessed. In this study, we used a mechanistic competition model to unravel the effects of temperature and light on benthic community structure and algae dominance, focusing on key algae species: red calcareous algae and macroalgal fronds. We find that light is the primary driver of increases in macroalgal coverage, whereas increased seawater temperature plays a secondary role. Shifts leading to macroalgae dominated communities may be mediated by competitive interactions, and are likely due to three light-related processes: earlier sea ice break-out at high latitudes can result in an exponential increase in the cumulative amount of light that enters the water column during a year; threshold effect in light requirements for algal growth; and light requirements of calcareous algae being substantially lower than those of macroalgae. With continued warming, our modeling results suggest that reduced sea ice coverage and increased light availability will favor dominance of macroalgae, which due to their key ecological role are expected to alter the structure and functioning of arctic rocky bottom ecosystems. |
format |
Article in Journal/Newspaper |
author |
Scherrer, Kim Josefin Niklasdotter Kortsch, Susanne Varpe, Øystein Weyhenmeyer, Gesa Antonie Gulliksen, Bjørn Primicerio, Raul |
author_facet |
Scherrer, Kim Josefin Niklasdotter Kortsch, Susanne Varpe, Øystein Weyhenmeyer, Gesa Antonie Gulliksen, Bjørn Primicerio, Raul |
author_sort |
Scherrer, Kim Josefin Niklasdotter |
title |
Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic |
title_short |
Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic |
title_full |
Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic |
title_fullStr |
Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic |
title_full_unstemmed |
Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic |
title_sort |
mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the arctic |
publisher |
Wiley |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/15356 https://doi.org/10.1002/lno.11043 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Sea ice |
genre_facet |
Arctic Arctic Sea ice |
op_relation |
Limnology and Oceanography Scherrer, K.J.N., Kortsch, S., Varpe, Ø., Weyhenmeyer, G.A., Gulliksen, B. & Primicerio, R. (2018). Mechanistic model identifies increasing light availability due to sea ice reductions as cause for increasing macroalgae cover in the Arctic. Limnology and Oceanography, 64 (1), 330-341. https://doi.org/10.1002/lno.11043 FRIDAID 1692065 doi:10.1002/lno.11043 0024-3590 1939-5590 https://hdl.handle.net/10037/15356 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1002/lno.11043 |
container_title |
Limnology and Oceanography |
container_volume |
64 |
container_issue |
1 |
container_start_page |
330 |
op_container_end_page |
341 |
_version_ |
1766300190313021440 |