NDLI: Air pollution below WHO levels decreases by 40 % the links of terrestrial microbial networks

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Air pollution below WHO levels decreases by 40 % the links of terrestrial microbial networks

Content Provider	Springer Nature Link
Author	Karimi, Battle Meyer, Caroline Gilbert, Daniel Bernard, Nadine
Copyright Year	2016
Abstract	Air pollution has a deleterious impact on public health and the environment. There is few knowledge on the effect of air pollution on terrestrial microbial communities, despite the major role of microbes in ecosystems. Here, we designed an in situ trial ecosystem to assess the impact of moderate atmospheric pollution, below World Health Organization (WHO) thresholds, on an indigenous microbial communities, including bacteria, fungi, ciliates, algae, cyanobacteria, testate amoebae, rotifers and nematodes, extracted from terrestrial bryophytes. These micro-ecosystems were placed at a rural, an urban and an industrial site in France and were thus exposed to various levels of nitrogen dioxide (NO2), from 6.6–67.9 μg·m−3, and particulate matter, from 0.7–7.9 μg·m−3. Microbial analysis was performed by microscopy. We determined atmospheric temperature, relative humidity and particulate matter with diameter lower than 10 µm (PM10), Cu, Cr, Fe, Ni, Pb, Zn in PM10, and (NO2). Results show a significant impact of chronic moderate exposure to NO2 and copper Cu-associated particulate matter on the global microbial network complexity. This is evidenced by a loss of about 40 % of microbial co-occurrence links during incubation. Most lost microbial links are ecologically positive links. Moreover, most changes in community co-occurrence networks are related to testate amoebae, a major top predator of microbes. Overall, our findings demonstrate that air pollution can have strong deleterious effects on microbial interactions, even at levels below WHO thresholds.
Starting Page	467
Ending Page	475
Page Count	9
File Format	PDF
ISSN	16103653
Journal	Environmental Chemistry Letters
Volume Number	14
Issue Number	4
e-ISSN	16103661
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-10-03
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atmospheric pollution Microbial community Co-occurrence network Keystone group Environmental Chemistry Ecotoxicology Pollution Analytical Chemistry Geochemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry

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