In:
Communications Biology, Springer Science and Business Media LLC, Vol. 6, No. 1 ( 2023-02-23)
Abstract:
The mechanisms by which large-scale microbial community function emerges from complex ecological interactions between individual taxa and functional groups remain obscure. We leveraged network analyses of 16S rRNA amplicon sequences obtained over a seven-month timeseries in seasonally anoxic Saanich Inlet (Vancouver Island, Canada) to investigate relationships between microbial community structure and water column N 2 O cycling. Taxa separately broadly into three discrete subnetworks with contrasting environmental distributions. Oxycline subnetworks were structured around keystone aerobic heterotrophs that correlated with nitrification rates and N 2 O supersaturations, linking N 2 O production and accumulation to taxa involved in organic matter remineralization. Keystone taxa implicated in anaerobic carbon, nitrogen, and sulfur cycling in anoxic environments clustered together in a low-oxygen subnetwork that correlated positively with nitrification N 2 O yields and N 2 O production from denitrification. Close coupling between N 2 O producers and consumers in the anoxic basin is indicated by strong correlations between the low-oxygen subnetwork, PICRUSt2-predicted nitrous oxide reductase ( nosZ ) gene abundances, and N 2 O undersaturation. This study implicates keystone taxa affiliated with common ODZ groups as a potential control on water column N 2 O cycling and provides a theoretical basis for further investigations into marine microbial interaction networks.
Type of Medium:
Online Resource
ISSN:
2399-3642
DOI:
10.1038/s42003-023-04597-5
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2919698-X
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