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Phylogenetic Patterns in the Microbial Response to Resource Availability: Amino Acid Incorporation in San Francisco Bay

Journal Article · · PLoS ONE
 [1];  [2];  [2];  [2]
  1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); DOE/OSTI
  2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Aquatic microorganisms are typically identified as either oligotrophic or copiotrophic, representing trophic strategies adapted to low or high nutrient concentrations, respectively. Here, we sought to take steps towards identifying these and additional adaptations to nutrient availability with a quantitative analysis of microbial resource use in mixed communities. We incubated an estuarine microbial community with stable isotope labeled amino acids (AAs) at concentrations spanning three orders of magnitude, followed by taxon-specific quantitation of isotopic incorporation using NanoSIMS analysis of high-density microarrays. The resulting data revealed that trophic response to AA availability falls along a continuum between copiotrophy and oligotrophy, and high and low activity. To illustrate strategies along this continuum more simply, we statistically categorized microbial taxa among three trophic types, based on their incorporation responses to increasing resource concentration. The data indicated that taxa with copiotrophic-like resource use were not necessarily the most active, and taxa with oligotrophic-like resource use were not always the least active. Two of the trophic strategies were not randomly distributed throughout a 16S rDNA phylogeny, suggesting they are under selective pressure in this ecosystem and that a link exists between evolutionary relatedness and substrate affinity. The diversity of strategies to adapt to differences in resource availability highlights the need to expand our understanding of microbial interactions with organic matter in order to better predict microbial responses to a changing environment.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1627695
Journal Information:
PLoS ONE, Journal Name: PLoS ONE Journal Issue: 4 Vol. 9; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (13)

Exometabolomics and MSI: deconstructing how cells interact to transform their small molecule environment journal August 2015
Phylogenetic organization of bacterial activity journal March 2016
Phylogenetically conserved resource partitioning in the coastal microbial loop journal August 2017
Proteomic Stable Isotope Probing Reveals Taxonomically Distinct Patterns in Amino Acid Assimilation by Coastal Marine Bacterioplankton journal April 2016
Taxon-Function Decoupling as an Adaptive Signature of Lake Microbial Metacommunities Under a Chronic Polymetallic Pollution Gradient journal May 2018
Spatial Variability and Co-acclimation of Phytoplankton and Bacterioplankton Communities in the Pearl River Estuary, China journal October 2018
Heat‐induced shift in coral microbiome reveals several members of the Rhodobacteraceae family as indicator species for thermal stress in Porites lutea journal September 2019
Chemotaxis toward phytoplankton drives organic matter partitioning among marine bacteria journal January 2016
Quantitative isotope incorporation reveals substrate partitioning in a coastal microbial community journal March 2018
Strategies and ecological roles of algicidal bacteria journal August 2017
Multiple Megaplasmids Confer Extremely High Levels of Metal Tolerance in Alteromonas Strains journal November 2019
Microbial Surface Colonization and Biofilm Development in Marine Environments journal December 2015
Alien vs. predator: bacterial challenge alters coral microbiomes unless controlled by Halobacteriovorax predators journal January 2017

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