Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters
Abstract Diatoms are important components of the marine food web and one of the most species‐rich groups of phytoplankton. The diversity and composition of diatoms in eutrophic nearshore habitats have been well documented due to the outsized influence of diatoms on coastal ecosystem functioning. In...
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Online Access: | http://dx.doi.org/10.1111/jpy.13388 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/jpy.13388 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.13388 |
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crwiley:10.1111/jpy.13388 2024-05-19T07:45:15+00:00 Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters Setta, Samantha P. Lerch, Sarah Jenkins, Bethany D. Dyhrman, Sonya T. Rynearson, Tatiana A. National Science Foundation Paul M. Angell Family Foundation 2023 http://dx.doi.org/10.1111/jpy.13388 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/jpy.13388 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.13388 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Phycology volume 59, issue 6, page 1202-1216 ISSN 0022-3646 1529-8817 journal-article 2023 crwiley https://doi.org/10.1111/jpy.13388 2024-04-25T08:26:59Z Abstract Diatoms are important components of the marine food web and one of the most species‐rich groups of phytoplankton. The diversity and composition of diatoms in eutrophic nearshore habitats have been well documented due to the outsized influence of diatoms on coastal ecosystem functioning. In contrast, patterns of both diatom diversity and community composition in offshore oligotrophic regions where diatom biomass is low have been poorly resolved. To compare the diatom diversity and community composition in oligotrophic and eutrophic waters, diatom communities were sampled along a 1,250 km transect from the oligotrophic Sargasso Sea to the coastal waters of the northeast US shelf. Diatom community composition was determined by amplifying and sequencing the 18S rDNA V4 region. Of the 301 amplicon sequence variants (ASVs) identified along the transect, the majority (70%) were sampled exclusively from oligotrophic waters of the Gulf Stream and Sargasso Sea and included the genera Bacteriastrum , Haslea , Hemiaulus , Pseudo ‐ nitzschia , and Nitzschia . Diatom ASV richness did not vary along the transect, indicating that the oligotrophic Sargasso Sea and Gulf Stream are occupied by a diverse diatom community. Although ASV richness was similar between oligotrophic and coastal waters, diatom community composition in these regions differed significantly and was correlated with temperature and phosphate, two environmental variables known to influence diatom metabolism and geographic distribution. In sum, oligotrophic waters of the western North Atlantic harbor diverse diatom assemblages that are distinct from coastal regions, and these open ocean diatoms warrant additional study, as they may play critical roles in oligotrophic ecosystems. Article in Journal/Newspaper North Atlantic Northwest Atlantic Wiley Online Library Journal of Phycology 59 6 1202 1216 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Diatoms are important components of the marine food web and one of the most species‐rich groups of phytoplankton. The diversity and composition of diatoms in eutrophic nearshore habitats have been well documented due to the outsized influence of diatoms on coastal ecosystem functioning. In contrast, patterns of both diatom diversity and community composition in offshore oligotrophic regions where diatom biomass is low have been poorly resolved. To compare the diatom diversity and community composition in oligotrophic and eutrophic waters, diatom communities were sampled along a 1,250 km transect from the oligotrophic Sargasso Sea to the coastal waters of the northeast US shelf. Diatom community composition was determined by amplifying and sequencing the 18S rDNA V4 region. Of the 301 amplicon sequence variants (ASVs) identified along the transect, the majority (70%) were sampled exclusively from oligotrophic waters of the Gulf Stream and Sargasso Sea and included the genera Bacteriastrum , Haslea , Hemiaulus , Pseudo ‐ nitzschia , and Nitzschia . Diatom ASV richness did not vary along the transect, indicating that the oligotrophic Sargasso Sea and Gulf Stream are occupied by a diverse diatom community. Although ASV richness was similar between oligotrophic and coastal waters, diatom community composition in these regions differed significantly and was correlated with temperature and phosphate, two environmental variables known to influence diatom metabolism and geographic distribution. In sum, oligotrophic waters of the western North Atlantic harbor diverse diatom assemblages that are distinct from coastal regions, and these open ocean diatoms warrant additional study, as they may play critical roles in oligotrophic ecosystems. |
author2 |
National Science Foundation Paul M. Angell Family Foundation |
format |
Article in Journal/Newspaper |
author |
Setta, Samantha P. Lerch, Sarah Jenkins, Bethany D. Dyhrman, Sonya T. Rynearson, Tatiana A. |
spellingShingle |
Setta, Samantha P. Lerch, Sarah Jenkins, Bethany D. Dyhrman, Sonya T. Rynearson, Tatiana A. Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters |
author_facet |
Setta, Samantha P. Lerch, Sarah Jenkins, Bethany D. Dyhrman, Sonya T. Rynearson, Tatiana A. |
author_sort |
Setta, Samantha P. |
title |
Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters |
title_short |
Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters |
title_full |
Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters |
title_fullStr |
Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters |
title_full_unstemmed |
Oligotrophic waters of the Northwest Atlantic support taxonomically diverse diatom communities that are distinct from coastal waters |
title_sort |
oligotrophic waters of the northwest atlantic support taxonomically diverse diatom communities that are distinct from coastal waters |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/jpy.13388 https://onlinelibrary.wiley.com/doi/am-pdf/10.1111/jpy.13388 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.13388 |
genre |
North Atlantic Northwest Atlantic |
genre_facet |
North Atlantic Northwest Atlantic |
op_source |
Journal of Phycology volume 59, issue 6, page 1202-1216 ISSN 0022-3646 1529-8817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jpy.13388 |
container_title |
Journal of Phycology |
container_volume |
59 |
container_issue |
6 |
container_start_page |
1202 |
op_container_end_page |
1216 |
_version_ |
1799485244912435200 |