Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard
A warmer Arctic with less sea ice will likely improve macroalgae growth conditions, but observational data to support this hypothesis are scarce. In this study, we combined hydroacoustic and video inspections to compare the depth of growth, density and thickness of macroalgae (>10 cm) meadows in...
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Online Access: | https://doi.org/10.3389/fmars.2022.1021675 https://doaj.org/article/adf764fa80ac49eca20e86d3b66be9f0 |
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ftdoajarticles:oai:doaj.org/article:adf764fa80ac49eca20e86d3b66be9f0 2023-05-15T14:45:34+02:00 Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard Józef M. Wiktor Agnieszka Tatarek Aleksandra Kruss Rakesh Kumar Singh Janne E. Søreide 2022-11-01T00:00:00Z https://doi.org/10.3389/fmars.2022.1021675 https://doaj.org/article/adf764fa80ac49eca20e86d3b66be9f0 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2022.1021675/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.1021675 https://doaj.org/article/adf764fa80ac49eca20e86d3b66be9f0 Frontiers in Marine Science, Vol 9 (2022) kelp forest hydroacoustic ice-scouring Arctic climate change Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2022 ftdoajarticles https://doi.org/10.3389/fmars.2022.1021675 2022-12-30T21:26:43Z A warmer Arctic with less sea ice will likely improve macroalgae growth conditions, but observational data to support this hypothesis are scarce. In this study, we combined hydroacoustic and video inspections to compare the depth of growth, density and thickness of macroalgae (>10 cm) meadows in two contrasting climate regimes in Svalbard 1) the warm, ice free, Atlantic influenced West Spitsbergen and 2) the cold, Arctic and seasonal ice covered East Spitsbergen. Both places had similar insolation and comparable turbidity levels. Macroalgae communities at both places were similar and were formed mainly by common north Atlantic kelp species: Saccharina latissima, Alaria esculenta, Laminaria digitata and L. hyperborea. However, the density of the bottom coverage and thalli condition were strikingly different between the two sites. Algae at the warmer site were intact and fully developed and occupied most of the available hard substrate. At the colder site, only patchy macroalgae canopies were found and most thallies were physically damaged and trimmed at a uniform height due to physical ice scouring. These differences in macroalgal density and thalli condition were only found at depths down to 5 m. Deeper, no distinct differences were observed between the warm and cold sites. Sea urchins were only observed at the warm site, but in few numbers with no visible negative top-down control on macroalgae growth. Article in Journal/Newspaper Arctic Climate change North Atlantic Sea ice Svalbard Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
kelp forest hydroacoustic ice-scouring Arctic climate change Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
kelp forest hydroacoustic ice-scouring Arctic climate change Science Q General. Including nature conservation geographical distribution QH1-199.5 Józef M. Wiktor Agnieszka Tatarek Aleksandra Kruss Rakesh Kumar Singh Janne E. Søreide Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard |
topic_facet |
kelp forest hydroacoustic ice-scouring Arctic climate change Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
A warmer Arctic with less sea ice will likely improve macroalgae growth conditions, but observational data to support this hypothesis are scarce. In this study, we combined hydroacoustic and video inspections to compare the depth of growth, density and thickness of macroalgae (>10 cm) meadows in two contrasting climate regimes in Svalbard 1) the warm, ice free, Atlantic influenced West Spitsbergen and 2) the cold, Arctic and seasonal ice covered East Spitsbergen. Both places had similar insolation and comparable turbidity levels. Macroalgae communities at both places were similar and were formed mainly by common north Atlantic kelp species: Saccharina latissima, Alaria esculenta, Laminaria digitata and L. hyperborea. However, the density of the bottom coverage and thalli condition were strikingly different between the two sites. Algae at the warmer site were intact and fully developed and occupied most of the available hard substrate. At the colder site, only patchy macroalgae canopies were found and most thallies were physically damaged and trimmed at a uniform height due to physical ice scouring. These differences in macroalgal density and thalli condition were only found at depths down to 5 m. Deeper, no distinct differences were observed between the warm and cold sites. Sea urchins were only observed at the warm site, but in few numbers with no visible negative top-down control on macroalgae growth. |
format |
Article in Journal/Newspaper |
author |
Józef M. Wiktor Agnieszka Tatarek Aleksandra Kruss Rakesh Kumar Singh Janne E. Søreide |
author_facet |
Józef M. Wiktor Agnieszka Tatarek Aleksandra Kruss Rakesh Kumar Singh Janne E. Søreide |
author_sort |
Józef M. Wiktor |
title |
Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard |
title_short |
Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard |
title_full |
Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard |
title_fullStr |
Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard |
title_full_unstemmed |
Comparison of macroalgae meadows in warm Atlantic versus cold Arctic regimes in the high-Arctic Svalbard |
title_sort |
comparison of macroalgae meadows in warm atlantic versus cold arctic regimes in the high-arctic svalbard |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.1021675 https://doaj.org/article/adf764fa80ac49eca20e86d3b66be9f0 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Climate change North Atlantic Sea ice Svalbard Spitsbergen |
genre_facet |
Arctic Climate change North Atlantic Sea ice Svalbard Spitsbergen |
op_source |
Frontiers in Marine Science, Vol 9 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2022.1021675/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.1021675 https://doaj.org/article/adf764fa80ac49eca20e86d3b66be9f0 |
op_doi |
https://doi.org/10.3389/fmars.2022.1021675 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1766316957129244672 |