Interactions in self-assembled microbial communities saturate with diversity.

The ISME Journal
Xiaoqian YuEric J Alm

Abstract

How the diversity of organisms competing for or sharing resources influences community function is an important question in ecology but has rarely been explored in natural microbial communities. These generally contain large numbers of species making it difficult to disentangle how the effects of different interactions scale with diversity. Here, we show that changing diversity affects measures of community function in relatively simple communities but that increasing richness beyond a threshold has little detectable effect. We generated self-assembled communities with a wide range of diversity by growth of cells from serially diluted seawater on brown algal leachate. We subsequently isolated the most abundant taxa from these communities via dilution-to-extinction in order to compare productivity functions of the entire community to those of individual taxa. To parse the effect of different types of organismal interactions, we defined relative total function (RTF) as an index for positive or negative effects of diversity on community function. Our analysis identified three overall regimes with increasing diversity. At low richness (<12 taxa), positive and negative effects of interactions were both weak, while at moderate richne...Continue Reading

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Citations

Jan 9, 2020·Nature Communications·Samuel Bickel, Dani Or
Mar 24, 2020·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Angela E Douglas
Jul 5, 2019·Proceedings of the National Academy of Sciences of the United States of America·Philippe PiccardiSara Mitri
Mar 24, 2020·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Alberto Pascual-GarcíaThomas Bell
Feb 6, 2020·Proceedings of the National Academy of Sciences of the United States of America·He FuMary Ann Moran
Jan 8, 2021·Environmental Pollution·Adijailton Jose de SouzaJussara Borges Regitano
Jan 14, 2021·Scientific Reports·Somsak LikhitrattanapisalSupawadee Ingsriswang
Apr 27, 2021·Frontiers in Microbiology·Sylvie EstrelaMaría Rebolleda-Gómez
May 27, 2021·The ISME Journal·Samuel Bickel, Dani Or
Jul 10, 2021·Ecology Letters·Thomas P SmithSamrāt Pawar
Aug 29, 2021·Science Advances·Samuel ChaffronDamien Eveillard

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Methods Mentioned

BETA
amplicon sequencing
Fluorescence-activated cell sorting
FACS
PCR

Software Mentioned

R package “ vegan ”
Anova
QIIME
R package “ phangorn ”
propagate
R package “ picante ”
microbiome helper
FastTree
R package “ breakaway
R package “ DECIPHER ”

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