Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula)
The kelp Laminaria solidungula is an important foundation species in the circumpolar Arctic. One of the largest populations of L. solidungula in the Beaufort Sea occurs in Stefansson Sound, off the north coast of Alaska. We surveyed kelp populations in the Stefansson Sound Boulder Patch and found th...
Published in: | Journal of Phycology |
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crwiley:10.1111/jpy.13187 2024-09-15T17:54:03+00:00 Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula) Muth, Arley F. Bonsell, Christina Dunton, Kenneth H. Amsler, C. Environmental Protection Agency 2021 http://dx.doi.org/10.1111/jpy.13187 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.13187 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jpy.13187 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Phycology volume 57, issue 5, page 1554-1562 ISSN 0022-3646 1529-8817 journal-article 2021 crwiley https://doi.org/10.1111/jpy.13187 2024-09-05T05:05:00Z The kelp Laminaria solidungula is an important foundation species in the circumpolar Arctic. One of the largest populations of L. solidungula in the Beaufort Sea occurs in Stefansson Sound, off the north coast of Alaska. We surveyed kelp populations in the Stefansson Sound Boulder Patch and found that inshore sites in close proximity (3.5 km) to river input and increased turbidity exhibited lower sporophyte densities (0.36 ± 0.44 · m −2 ) than more offshore sites (>7 km) to the west (0.72 ± 0.48 · m −2 ) and east (4.72 ± 1.51 · m −2 ). We performed culture experiments to examine the possible combined effects of salinity and light on microscopic sporophyte production. Gametophytes cultured in the low salinity treatment (10) were unable to produce sporophytes regardless of light level. The highest light level tested (40 µmol photons · m −2 · s −1 ) produced the greatest sporophyte densities (0.037 ± 0.08 · mm −2 ) at a salinity of 30. Subsequent experimental work on the effect of salinity on microscopic stages revealed that haploid stages were not capable of producing sporophytes at a salinity of 10, but 3‐month‐old microscopic sporophytes were able to persist in the lower (10 and 20) salinity treatments. Although L. solidungula sporophytes have apparently acclimated to extreme salinity (<5–33) and light variations, the vulnerability of haploid microscopic stages to reduced salinity has the potential to affect future populations as the timing and magnitude of freshwater input to the Arctic Ocean changes. Article in Journal/Newspaper Arctic Ocean Beaufort Sea Alaska Wiley Online Library Journal of Phycology |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The kelp Laminaria solidungula is an important foundation species in the circumpolar Arctic. One of the largest populations of L. solidungula in the Beaufort Sea occurs in Stefansson Sound, off the north coast of Alaska. We surveyed kelp populations in the Stefansson Sound Boulder Patch and found that inshore sites in close proximity (3.5 km) to river input and increased turbidity exhibited lower sporophyte densities (0.36 ± 0.44 · m −2 ) than more offshore sites (>7 km) to the west (0.72 ± 0.48 · m −2 ) and east (4.72 ± 1.51 · m −2 ). We performed culture experiments to examine the possible combined effects of salinity and light on microscopic sporophyte production. Gametophytes cultured in the low salinity treatment (10) were unable to produce sporophytes regardless of light level. The highest light level tested (40 µmol photons · m −2 · s −1 ) produced the greatest sporophyte densities (0.037 ± 0.08 · mm −2 ) at a salinity of 30. Subsequent experimental work on the effect of salinity on microscopic stages revealed that haploid stages were not capable of producing sporophytes at a salinity of 10, but 3‐month‐old microscopic sporophytes were able to persist in the lower (10 and 20) salinity treatments. Although L. solidungula sporophytes have apparently acclimated to extreme salinity (<5–33) and light variations, the vulnerability of haploid microscopic stages to reduced salinity has the potential to affect future populations as the timing and magnitude of freshwater input to the Arctic Ocean changes. |
author2 |
Amsler, C. Environmental Protection Agency |
format |
Article in Journal/Newspaper |
author |
Muth, Arley F. Bonsell, Christina Dunton, Kenneth H. |
spellingShingle |
Muth, Arley F. Bonsell, Christina Dunton, Kenneth H. Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula) |
author_facet |
Muth, Arley F. Bonsell, Christina Dunton, Kenneth H. |
author_sort |
Muth, Arley F. |
title |
Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula) |
title_short |
Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula) |
title_full |
Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula) |
title_fullStr |
Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula) |
title_full_unstemmed |
Inherent tolerance of extreme seasonal variability in light and salinity in an Arctic endemic kelp ( Laminaria solidungula) |
title_sort |
inherent tolerance of extreme seasonal variability in light and salinity in an arctic endemic kelp ( laminaria solidungula) |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/jpy.13187 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.13187 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jpy.13187 |
genre |
Arctic Ocean Beaufort Sea Alaska |
genre_facet |
Arctic Ocean Beaufort Sea Alaska |
op_source |
Journal of Phycology volume 57, issue 5, page 1554-1562 ISSN 0022-3646 1529-8817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jpy.13187 |
container_title |
Journal of Phycology |
_version_ |
1810430229479424000 |