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Temporal and Spatial Dynamics of Synechococcus Clade II and Other Microbes in the Eutrophic Subtropical San Diego Bay.

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Title: Temporal and Spatial Dynamics of Synechococcus Clade II and Other Microbes in the Eutrophic Subtropical San Diego Bay.
Authors: Harding, Katie J.1 (AUTHOR), Nagarkar, Maitreyi1 (AUTHOR), Wang, Maggie1 (AUTHOR), Ramsing, Kailey1 (AUTHOR), Anidjar, Niv1 (AUTHOR), Giddings, Sarah1 (AUTHOR), Brahamsha, Bianca1 (AUTHOR), Palenik, Brian1 (AUTHOR) bpalenik@ucsd.edu
Source: Environmental Microbiology. Feb2025, Vol. 27 Issue 2, p1-21. 21p.
Subjects: Territorial waters, Synechococcus, Polywater, Ribosomal RNA, Seasons
Abstract: The diversity of the marine cyanobacterium Synechococcus can be broadly separated into clades, with clade II typically present in warm oligotrophic water, and clades I and IV found in cooler coastal water. We found amplicon sequence variants (ASVs) belonging to clade II in the nutrient‐replete waters of San Diego Bay (SDB). Using the 16S rRNA gene, 18S rRNA gene and internal transcribed spacer region sequencing, we analysed multiple locations in SDB monthly for over a year, with additional samples dating back to 2015. Synechococcus community composition differed from the nearby coast into SDB in terms of dominant clade and ASVs. Specific clade II ASVs became relatively more abundant towards the back of the bay and showed seasonality, with higher relative abundance in the warm months. Select ASVs group phylogenetically and show similar seasonal and spatial distribution patterns, indicating these ASVs have adapted to SDB. Isolates matching clade II ASVs from SDB show pigment composition that is better adapted to the green light available in SDB, further supporting our findings. Other microbial taxa also show SDB enrichment, providing evidence that SDB is a chemostat‐like environment where circulation, temperature, light and other environmental conditions create a zone for microbial evolution and diversification. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Microbiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Temporal and Spatial Dynamics of Synechococcus Clade II and Other Microbes in the Eutrophic Subtropical San Diego Bay.
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  Data: <searchLink fieldCode="AR" term="%22Harding%2C+Katie+J%2E%22">Harding, Katie J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nagarkar%2C+Maitreyi%22">Nagarkar, Maitreyi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Maggie%22">Wang, Maggie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ramsing%2C+Kailey%22">Ramsing, Kailey</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Anidjar%2C+Niv%22">Anidjar, Niv</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Giddings%2C+Sarah%22">Giddings, Sarah</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Brahamsha%2C+Bianca%22">Brahamsha, Bianca</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Palenik%2C+Brian%22">Palenik, Brian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> bpalenik@ucsd.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Microbiology%22">Environmental Microbiology</searchLink>. Feb2025, Vol. 27 Issue 2, p1-21. 21p.
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  Data: <searchLink fieldCode="DE" term="%22Territorial+waters%22">Territorial waters</searchLink><br /><searchLink fieldCode="DE" term="%22Synechococcus%22">Synechococcus</searchLink><br /><searchLink fieldCode="DE" term="%22Polywater%22">Polywater</searchLink><br /><searchLink fieldCode="DE" term="%22Ribosomal+RNA%22">Ribosomal RNA</searchLink><br /><searchLink fieldCode="DE" term="%22Seasons%22">Seasons</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The diversity of the marine cyanobacterium Synechococcus can be broadly separated into clades, with clade II typically present in warm oligotrophic water, and clades I and IV found in cooler coastal water. We found amplicon sequence variants (ASVs) belonging to clade II in the nutrient‐replete waters of San Diego Bay (SDB). Using the 16S rRNA gene, 18S rRNA gene and internal transcribed spacer region sequencing, we analysed multiple locations in SDB monthly for over a year, with additional samples dating back to 2015. Synechococcus community composition differed from the nearby coast into SDB in terms of dominant clade and ASVs. Specific clade II ASVs became relatively more abundant towards the back of the bay and showed seasonality, with higher relative abundance in the warm months. Select ASVs group phylogenetically and show similar seasonal and spatial distribution patterns, indicating these ASVs have adapted to SDB. Isolates matching clade II ASVs from SDB show pigment composition that is better adapted to the green light available in SDB, further supporting our findings. Other microbial taxa also show SDB enrichment, providing evidence that SDB is a chemostat‐like environment where circulation, temperature, light and other environmental conditions create a zone for microbial evolution and diversification. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Environmental Microbiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/1462-2920.70043
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      – Code: eng
        Text: English
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      – SubjectFull: Territorial waters
        Type: general
      – SubjectFull: Synechococcus
        Type: general
      – SubjectFull: Polywater
        Type: general
      – SubjectFull: Ribosomal RNA
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      – SubjectFull: Seasons
        Type: general
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      – TitleFull: Temporal and Spatial Dynamics of Synechococcus Clade II and Other Microbes in the Eutrophic Subtropical San Diego Bay.
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              M: 02
              Text: Feb2025
              Type: published
              Y: 2025
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