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Temporal variability and coherence of euphotic zone bacterial communities over a decade in the Southern California Bight.

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Title: Temporal variability and coherence of euphotic zone bacterial communities over a decade in the Southern California Bight.
Authors: Chow, Cheryl-Emiliane T1, Sachdeva, Rohan1, Cram, Jacob A1, Steele, Joshua A1, Needham, David M1, Patel, Anand1, Parada, Alma E1, Fuhrman, Jed A1
Source: ISME Journal: Multidisciplinary Journal of Microbial Ecology. Dec2013, Vol. 7 Issue 12, p2259-2273. 15p.
Subjects: Coherence (Optics), Differences, Screech owls, Mathematical series, Photosynthetic pigments
Geographic Terms: California
Abstract: Time-series are critical to understanding long-term natural variability in the oceans. Bacterial communities in the euphotic zone were investigated for over a decade at the San Pedro Ocean Time-series station (SPOT) off southern California. Community composition was assessed by Automated Ribosomal Intergenic Spacer Analysis (ARISA) and coupled with measurements of oceanographic parameters for the surface ocean (0-5 m) and deep chlorophyll maximum (DCM, average depth ∼30 m). SAR11 and cyanobacterial ecotypes comprised typically more than one-third of the measured community; diversity within both was temporally variable, although a few operational taxonomic units (OTUs) were consistently more abundant. Persistent OTUs, mostly Alphaproteobacteria (SAR11 clade), Actinobacteria and Flavobacteria, tended to be abundant, in contrast to many rarer yet intermittent and ephemeral OTUs. Association networks revealed potential niches for key OTUs from SAR11, cyanobacteria, SAR86 and other common clades on the basis of robust correlations. Resilience was evident by the average communities drifting only slightly as years passed. Average Bray-Curtis similarity between any pair of dates was ∼40%, with a slight decrease over the decade and obvious near-surface seasonality; communities 8-10 years apart were slightly more different than those 1-4 years apart with the highest rate of change at 0-5 m between communities <4 years apart. The surface exhibited more pronounced seasonality than the DCM. Inter-depth Bray-Curtis similarities repeatedly decreased as the water column stratified each summer. Environmental factors were better predictors of shifts in community composition than months or elapsed time alone; yet, the best predictor was community composition at the other depth (that is, 0-5 m versus DCM). [ABSTRACT FROM AUTHOR]
Copyright of ISME Journal: Multidisciplinary Journal of Microbial Ecology is the property of Oxford University Press / USA 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.)
Database: Engineering Source
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PubType: Academic Journal
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  Data: Temporal variability and coherence of euphotic zone bacterial communities over a decade in the Southern California Bight.
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  Data: Time-series are critical to understanding long-term natural variability in the oceans. Bacterial communities in the euphotic zone were investigated for over a decade at the San Pedro Ocean Time-series station (SPOT) off southern California. Community composition was assessed by Automated Ribosomal Intergenic Spacer Analysis (ARISA) and coupled with measurements of oceanographic parameters for the surface ocean (0-5 m) and deep chlorophyll maximum (DCM, average depth ∼30 m). SAR11 and cyanobacterial ecotypes comprised typically more than one-third of the measured community; diversity within both was temporally variable, although a few operational taxonomic units (OTUs) were consistently more abundant. Persistent OTUs, mostly Alphaproteobacteria (SAR11 clade), Actinobacteria and Flavobacteria, tended to be abundant, in contrast to many rarer yet intermittent and ephemeral OTUs. Association networks revealed potential niches for key OTUs from SAR11, cyanobacteria, SAR86 and other common clades on the basis of robust correlations. Resilience was evident by the average communities drifting only slightly as years passed. Average Bray-Curtis similarity between any pair of dates was ∼40%, with a slight decrease over the decade and obvious near-surface seasonality; communities 8-10 years apart were slightly more different than those 1-4 years apart with the highest rate of change at 0-5 m between communities &lt;4 years apart. The surface exhibited more pronounced seasonality than the DCM. Inter-depth Bray-Curtis similarities repeatedly decreased as the water column stratified each summer. Environmental factors were better predictors of shifts in community composition than months or elapsed time alone; yet, the best predictor was community composition at the other depth (that is, 0-5 m versus DCM). [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of ISME Journal: Multidisciplinary Journal of Microbial Ecology is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder&#39;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.&lt;/i&gt; (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=92035560
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1038/ismej.2013.122
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
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    Subjects:
      – SubjectFull: Coherence (Optics)
        Type: general
      – SubjectFull: Differences
        Type: general
      – SubjectFull: Screech owls
        Type: general
      – SubjectFull: Mathematical series
        Type: general
      – SubjectFull: Photosynthetic pigments
        Type: general
      – SubjectFull: California
        Type: general
    Titles:
      – TitleFull: Temporal variability and coherence of euphotic zone bacterial communities over a decade in the Southern California Bight.
        Type: main
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            NameFull: Chow, Cheryl-Emiliane T
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            NameFull: Sachdeva, Rohan
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            NameFull: Cram, Jacob A
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            NameFull: Steele, Joshua A
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            NameFull: Needham, David M
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              M: 12
              Text: Dec2013
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              Y: 2013
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            – TitleFull: ISME Journal: Multidisciplinary Journal of Microbial Ecology
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