Linking bacterial community composition to soil salinity along environmental gradients

Kristin M. Rath, Noah Fierer, Daniel V. Murphy, Johannes Rousk

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Salinization is recognized as a threat to soil fertility worldwide. A challenge in understanding the effects of salinity on soil microbial communities is the fact that it can be difficult to disentangle the effects of salinity from those of other variables that may co-vary with salinity. Here we use a trait-based approach to identify direct effects of salinity on soil bacterial communities across two salinity gradients. Through dose–response relationships between salinity and bacterial growth, we quantified distributions of the trait salt tolerance within the communities. Community salt tolerance was closely correlated with soil salinity, indicating a strong filtering effect of salinity on the bacterial communities. Accompanying the increases in salt tolerance were consistent shifts in bacterial community composition. We identified specific bacterial taxa that increased in relative abundances with community salt tolerance, which could be used as bioindicators for high community salt tolerance. A strong filtering effect was also observed for pH across the gradients, with pH tolerance of bacterial communities correlated to soil pH. We propose phenotypic trait distributions aggregated at the community level as a useful approach to study the role of environmental factors as filters of microbial community composition.

Original languageEnglish
Pages (from-to)836-846
Number of pages11
JournalISME Journal
Volume13
Issue number3
DOIs
Publication statusPublished - 1 Mar 2019

Fingerprint

Salinity
environmental gradient
soil salinity
bacterial communities
community composition
Salt-Tolerance
Soil
salt tolerance
salinity
tolerance
salt
microbial communities
microbial community
soil salinization
soil
dose-response relationship
soil bacteria
salinization
Proton-Motive Force
bioindicator

Cite this

Rath, Kristin M. ; Fierer, Noah ; Murphy, Daniel V. ; Rousk, Johannes. / Linking bacterial community composition to soil salinity along environmental gradients. In: ISME Journal. 2019 ; Vol. 13, No. 3. pp. 836-846.
@article{91cec29caf584a89bdbb412e851fb5ca,
title = "Linking bacterial community composition to soil salinity along environmental gradients",
abstract = "Salinization is recognized as a threat to soil fertility worldwide. A challenge in understanding the effects of salinity on soil microbial communities is the fact that it can be difficult to disentangle the effects of salinity from those of other variables that may co-vary with salinity. Here we use a trait-based approach to identify direct effects of salinity on soil bacterial communities across two salinity gradients. Through dose–response relationships between salinity and bacterial growth, we quantified distributions of the trait salt tolerance within the communities. Community salt tolerance was closely correlated with soil salinity, indicating a strong filtering effect of salinity on the bacterial communities. Accompanying the increases in salt tolerance were consistent shifts in bacterial community composition. We identified specific bacterial taxa that increased in relative abundances with community salt tolerance, which could be used as bioindicators for high community salt tolerance. A strong filtering effect was also observed for pH across the gradients, with pH tolerance of bacterial communities correlated to soil pH. We propose phenotypic trait distributions aggregated at the community level as a useful approach to study the role of environmental factors as filters of microbial community composition.",
author = "Rath, {Kristin M.} and Noah Fierer and Murphy, {Daniel V.} and Johannes Rousk",
year = "2019",
month = "3",
day = "1",
doi = "10.1038/s41396-018-0313-8",
language = "English",
volume = "13",
pages = "836--846",
journal = "The ISME Journal",
issn = "1751-7362",
publisher = "Nature Publishing Group",
number = "3",

}

Linking bacterial community composition to soil salinity along environmental gradients. / Rath, Kristin M.; Fierer, Noah; Murphy, Daniel V.; Rousk, Johannes.

In: ISME Journal, Vol. 13, No. 3, 01.03.2019, p. 836-846.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Linking bacterial community composition to soil salinity along environmental gradients

AU - Rath, Kristin M.

AU - Fierer, Noah

AU - Murphy, Daniel V.

AU - Rousk, Johannes

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Salinization is recognized as a threat to soil fertility worldwide. A challenge in understanding the effects of salinity on soil microbial communities is the fact that it can be difficult to disentangle the effects of salinity from those of other variables that may co-vary with salinity. Here we use a trait-based approach to identify direct effects of salinity on soil bacterial communities across two salinity gradients. Through dose–response relationships between salinity and bacterial growth, we quantified distributions of the trait salt tolerance within the communities. Community salt tolerance was closely correlated with soil salinity, indicating a strong filtering effect of salinity on the bacterial communities. Accompanying the increases in salt tolerance were consistent shifts in bacterial community composition. We identified specific bacterial taxa that increased in relative abundances with community salt tolerance, which could be used as bioindicators for high community salt tolerance. A strong filtering effect was also observed for pH across the gradients, with pH tolerance of bacterial communities correlated to soil pH. We propose phenotypic trait distributions aggregated at the community level as a useful approach to study the role of environmental factors as filters of microbial community composition.

AB - Salinization is recognized as a threat to soil fertility worldwide. A challenge in understanding the effects of salinity on soil microbial communities is the fact that it can be difficult to disentangle the effects of salinity from those of other variables that may co-vary with salinity. Here we use a trait-based approach to identify direct effects of salinity on soil bacterial communities across two salinity gradients. Through dose–response relationships between salinity and bacterial growth, we quantified distributions of the trait salt tolerance within the communities. Community salt tolerance was closely correlated with soil salinity, indicating a strong filtering effect of salinity on the bacterial communities. Accompanying the increases in salt tolerance were consistent shifts in bacterial community composition. We identified specific bacterial taxa that increased in relative abundances with community salt tolerance, which could be used as bioindicators for high community salt tolerance. A strong filtering effect was also observed for pH across the gradients, with pH tolerance of bacterial communities correlated to soil pH. We propose phenotypic trait distributions aggregated at the community level as a useful approach to study the role of environmental factors as filters of microbial community composition.

UR - http://www.scopus.com/inward/record.url?scp=85056745707&partnerID=8YFLogxK

U2 - 10.1038/s41396-018-0313-8

DO - 10.1038/s41396-018-0313-8

M3 - Article

VL - 13

SP - 836

EP - 846

JO - The ISME Journal

JF - The ISME Journal

SN - 1751-7362

IS - 3

ER -