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Contrasting Effects of Local Environmental and Biogeographic Factors on the Composition and Structure of Bacterial Communities in Arid Monospecific Mangrove Soils

Thomson, T.; Fusi, M.; Bennett-Smith, M. F.; Prinz, N.; Aylagas, E.; Carvalho, S.; Lovelock, C. E.; Jones, B. H.; Ellis, J. I.


T. Thomson

M. Fusi

M. F. Bennett-Smith

N. Prinz

E. Aylagas

S. Carvalho

C. E. Lovelock

B. H. Jones

J. I. Ellis


Mangrove forests are important biotic sinks of atmospheric CO2 and play an integral role in nutrient-cycling and decontamination of coastal waters, thereby mitigating climatic and anthropogenic stressors. These services are primarily regulated by the activity of the soil microbiome. To understand how environmental changes may affect this vital part of the ecosystem, it is key to understand the patterns that drive microbial community assembly in mangrove forest soils. High-throughput amplicon sequencing (16S rRNA) was applied on samples from arid Avicennia marina forests across different spatial scales from local to regional. Alongside conventional analyses of community ecology, microbial co-occurrence networks were assessed to investigate differences in composition and structure of the bacterial community. The bacterial community composition varied more strongly along an intertidal gradient within each mangrove forest, than between forests in different geographic regions (Australia/Saudi Arabia). In contrast, co-occurrence networks differed primarily between geographic regions, illustrating that the structure of the bacterial community is not necessarily linked to its composition. The local diversity in mangrove forest soils may have important implications for the quantification of biogeochemical processes and is important to consider when planning restoration activities.

Journal Article Type Article
Acceptance Date Dec 11, 2021
Online Publication Date Jan 5, 2022
Publication Date Feb 23, 2022
Deposit Date Feb 1, 2022
Publicly Available Date Feb 1, 2022
Journal Microbiology Spectrum
Print ISSN 2165-0497
Publisher American Society for Microbiology
Peer Reviewed Peer Reviewed
Volume 10
Issue 1
Keywords microbiome, 16S rRNA, microbial biogeography, ecological processes,community structure, co-occurrence network analysis, community assembly
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