How can fertilization regimes and durations shape earthworm gut microbiota in a long-term field experiment?

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Bi , Q-F , Jin , B-J , Zhu , D , Jiang , Y-G , Zheng , B-X , O'Connor , P , Yang , X-R , Richter , A , Lin , X-Y & Zhu , Y-G 2021 , ' How can fertilization regimes and durations shape earthworm gut microbiota in a long-term field experiment? ' , Ecotoxicology and Environmental Safety , vol. 224 , 112643 . https://doi.org/10.1016/j.ecoenv.2021.112643

Title: How can fertilization regimes and durations shape earthworm gut microbiota in a long-term field experiment?
Author: Bi, Qing-Fang; Jin, Bing-Jie; Zhu, Dong; Jiang, Yu-Gen; Zheng, Bang-Xiao; O'Connor, Patrick; Yang, Xiao-Ru; Richter, Andreas; Lin, Xian-Yong; Zhu, Yong-Guan
Contributor: University of Helsinki, Ecosystems and Environment Research Programme
Date: 2021-11
Language: eng
Number of pages: 10
Belongs to series: Ecotoxicology and Environmental Safety
ISSN: 0147-6513
URI: http://hdl.handle.net/10138/334397
Abstract: The positive roles of earthworms on soil functionality has been extensively documented. The capacity of the earthworm gut microbiota on decomposition and nutrient cycling under long-term fertilization in field conditions has rarely been studied. Here, we report the structural, taxonomic, and functional responses of Eisenia foetida and Pheretima guillelmi gut microbiota to different fertilization regimes and durations using 16S rRNA gene-based Illumina sequencing and high-throughput quantitative PCR techniques. Our results revealed that the core gut microbiota, especially the fermentative bacteria were mainly sourced from the soil, but strongly stimulated with species-specificity, potential benefits for the host and soil health. The functional compositions of gut microbiota were altered by fertilization with fertilization duration being more influential than fertilization regimes. Moreover, the combination of organic and inorganic fertilization with the longer duration resulted in a higher richness and connectivity in the gut microbiota, and also their functional potential related to carbon (C), nitrogen, and phosphorus cycling, particularly the labile C decomposition, denitrification, and phosphate mobilization. We also found that long-term inorganic fertilization increased the abundance of pathogenic bacteria in the P. guillelmi gut. This study demonstrates that understanding earthworm gut microbiota can provide insights into how agricultural practices can potentially alter soil ecosystem functions through the interactions between soil and earthworm gut microbiotas.
Subject: Organic-inorganic fertilization
Earthworm species
Gut microbiota
Functional genes
16S rRNA
LUMBRICUS-TERRESTRIS
SOIL BIODIVERSITY
NITROUS-OXIDE
COMMUNITIES
DIVERSITY
OLIGOCHAETA
FAMILIES
BACTERIA
GENES
1172 Environmental sciences
1181 Ecology, evolutionary biology
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