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A global overview of the trophic structure within microbiomes across ecosystems

Xiong, Wu and Jousset, Alexandre and Li, Rong and Delgado-Baquerizo, Manuel and Bahram, Mohammad and Logares, Ramiro and Wilden, Benjamin and de Groot, Gerard Arjen and Amacker, Nathalie and Kowalchuk, George A. and Shen, Qirong and Geisen, Stefan (2021). A global overview of the trophic structure within microbiomes across ecosystems. Environment International. 151 , 106438
[Research article]

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Abstract

The colossal project of mapping the microbiome on Earth is rapidly advancing, with a focus on individual microbial groups. However, a global assessment of the associations between predatory protists and their bacterial prey is still missing at a cross-ecosystem level. This knowledge is critical to better understand the importance of top-down links in structuring microbiomes. Here, we examined 38 sequence-based datasets of paired bacterial and protistan taxa, covering 3,178 samples from diverse habitats including freshwater, marine and soils. We show that community profiles of protists and bacteria strongly correlated across and within habitats, with trophic microbiome structures fundamentally differing across habitats. Soils hosted the most heterogenous and diverse microbiomes. Protist communities were dominated by predators in soils and phototrophs in aquatic environments. This led to changes in the ratio of total protists to bacteria richness, which was highest in marine, while that of predatory protists to bacteria was highest in soils. Taxon richness and relative abundance of predatory protists positively correlated with bacterial richness in marine habitats. These links differed between soils, predatory protist richness and the relative abundance of predatory protists positively correlated with bacterial richness in forest and grassland soils, but not in agricultural soils. Our results suggested that anthropogenic pressure affects higher trophic levels more than lower ones leading to a decoupled trophic structure in micro biomes. Together, our cumulative overview of microbiome patterns of bacteria and protists at the global scale revealed major patterns and differences of the trophic structure of microbiomes across Earth?s habitats, and show that anthropogenic factors might have negative effects on the trophic structure within microbiomes. Furthermore, the increased impact of anthropogenic factors on especially higher trophic levels suggests that often observed reduced ecosystem functions in anthropogenic systems might be partly attributed to a reduction of trophic complexity.

Authors/Creators:Xiong, Wu and Jousset, Alexandre and Li, Rong and Delgado-Baquerizo, Manuel and Bahram, Mohammad and Logares, Ramiro and Wilden, Benjamin and de Groot, Gerard Arjen and Amacker, Nathalie and Kowalchuk, George A. and Shen, Qirong and Geisen, Stefan
Title:A global overview of the trophic structure within microbiomes across ecosystems
Series Name/Journal:Environment International
Year of publishing :2021
Volume:151
Article number:106438
Number of Pages:10
Publisher:PERGAMON-ELSEVIER SCIENCE LTD
ISSN:0160-4120
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
Keywords:Microbiome, Bacteria, Protists, High-throughput sequencing, Trophic structure
URN:NBN:urn:nbn:se:slu:epsilon-p-111451
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111451
Additional ID:
Type of IDID
DOI10.1016/j.envint.2021.106438
Web of Science (WoS)000632312100001
ID Code:23282
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:16 Apr 2021 08:44
Metadata Last Modified:16 Apr 2021 08:51

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