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Title: Microbiomes Reduce Their Host’s Sensitivity to Interspecific Interactions

Abstract

Bacteria associated with eukaryotic hosts can affect host fitness and trophic interactions between eukaryotes, but the extent to which bacteria influence the eukaryotic species interactions within trophic levels that modulate biodiversity and species coexistence is mostly unknown. Here, we used phytoplankton, which are a classic model for evaluating interactions between species, grown with and without associated bacteria to test whether the bacteria alter the strength and type of species interactions within a trophic level. We demonstrate that host-associated bacteria alter host growth rates and carrying capacity. This did not change the type but frequently changed the strength of host interspecific interactions by facilitating host growth in the presence of an established species. These findings indicate that microbiomes can regulate their host species’ interspecific interactions. As between-species interaction strength impacts their ability to coexist, our findings show that microbiomes have the potential to modulate eukaryotic species diversity and community composition.

Authors:
 [1];  [1];  [2]; ORCiD logo [1];
  1. Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
  2. School for Environment and Sustainability, University of Michigan, Ann Arbor, Michigan, USA, Cooperative Institute for Great Lakes Research, University of Michigan, Ann Arbor, Michigan, USA
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1592504
Alternate Identifier(s):
OSTI ID: 1626151
Grant/Contract Number:  
DOE F052906; FG02-00ER41132
Resource Type:
Published Article
Journal Name:
mBio
Additional Journal Information:
Journal Name: mBio Journal Volume: 11 Journal Issue: 1; Journal ID: ISSN 2161-2129
Publisher:
American Society for Microbiology
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Microbiology; microbiome; eukaryotic species interactions; species coexistence; biodiversity

Citation Formats

Jackrel, Sara L., Schmidt, Kathryn C., Cardinale, Bradley J., Denef, Vincent J., and Cooper, ed., Vaughn S. Microbiomes Reduce Their Host’s Sensitivity to Interspecific Interactions. United States: N. p., 2020. Web. doi:10.1128/mBio.02657-19.
Jackrel, Sara L., Schmidt, Kathryn C., Cardinale, Bradley J., Denef, Vincent J., & Cooper, ed., Vaughn S. Microbiomes Reduce Their Host’s Sensitivity to Interspecific Interactions. United States. https://doi.org/10.1128/mBio.02657-19
Jackrel, Sara L., Schmidt, Kathryn C., Cardinale, Bradley J., Denef, Vincent J., and Cooper, ed., Vaughn S. Tue . "Microbiomes Reduce Their Host’s Sensitivity to Interspecific Interactions". United States. https://doi.org/10.1128/mBio.02657-19.
@article{osti_1592504,
title = {Microbiomes Reduce Their Host’s Sensitivity to Interspecific Interactions},
author = {Jackrel, Sara L. and Schmidt, Kathryn C. and Cardinale, Bradley J. and Denef, Vincent J. and Cooper, ed., Vaughn S.},
abstractNote = {Bacteria associated with eukaryotic hosts can affect host fitness and trophic interactions between eukaryotes, but the extent to which bacteria influence the eukaryotic species interactions within trophic levels that modulate biodiversity and species coexistence is mostly unknown. Here, we used phytoplankton, which are a classic model for evaluating interactions between species, grown with and without associated bacteria to test whether the bacteria alter the strength and type of species interactions within a trophic level. We demonstrate that host-associated bacteria alter host growth rates and carrying capacity. This did not change the type but frequently changed the strength of host interspecific interactions by facilitating host growth in the presence of an established species. These findings indicate that microbiomes can regulate their host species’ interspecific interactions. As between-species interaction strength impacts their ability to coexist, our findings show that microbiomes have the potential to modulate eukaryotic species diversity and community composition.},
doi = {10.1128/mBio.02657-19},
journal = {mBio},
number = 1,
volume = 11,
place = {United States},
year = {Tue Feb 25 00:00:00 EST 2020},
month = {Tue Feb 25 00:00:00 EST 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1128/mBio.02657-19

Citation Metrics:
Cited by: 15 works
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Figures / Tables:

FIG 1 FIG 1: (A) Micrographs depicting the presence and absence of phytoplankton-associated bacteria prior to and after using our axenification protocol on Chlorella sorokiniana. Samples were stained with DAPI (4',6-diamidino-2-phenylindole) and viewed at a x 100 magnification with an oil immersion lens on a Zeiss AxioImager M2 epifluorescence microscope. Bacteria andmore » phytoplankton were visualized under a DAPI filter (bandpass, 450- to 490-nm excitation; long pass, 515-nm emission). See micrographs of the other phytoplankton species in Fig. S1 in the supplemental material. (B) Gel electrophoresis analysis of xenic and axenic phytoplankton cultures, with 16S rRNA gene amplification on the top and 18S rRNA gene amplification on the bottom. Lanes: 1, 1-kb ladder; 2 and 3, axenic and xenic Scenedesmus acuminatus, respectively; 4 and 5, axenic and xenic Coelastrum microporum, respectively; 6 and 7, axenic and xenic Monoraphidium minutum, respectively; 8 and 9, axenic and xenic Oocystis polymorpha, respectively; 10 and 11, axenic and xenic Chlorella sorokiniana, respectively; 12 and 13, axenic and xenic Selenastrum capricornutum, respectively. Negative template controls (lane 14) and a positive template control of extracted DNA from quagga mussel (Dreissena bugensis) and its associated bacteria (lane 15) were also included.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.