Impacts of microbial assemblage and environmental conditions on the distribution of anatoxin-a producing cyanobacteria within a river network.

The ISME Journal
Keith Bouma-GregsonJillian F Banfield

Abstract

Blooms of planktonic cyanobacteria have long been of concern in lakes, but more recently, harmful impacts of riverine benthic cyanobacterial mats been recognized. As yet, we know little about how various benthic cyanobacteria are distributed in river networks, or how environmental conditions or other associated microbes in their consortia affect their biosynthetic capacities. We performed metagenomic sequencing for 22 Oscillatoriales-dominated (Cyanobacteria) microbial mats collected across the Eel River network in Northern California and investigated factors associated with anatoxin-a producing cyanobacteria. All microbial communities were dominated by one or two cyanobacterial species, so the key mat metabolisms involve oxygenic photosynthesis and carbon oxidation. Only a few metabolisms fueled the growth of the mat communities, with little evidence for anaerobic metabolic pathways. We genomically defined four cyanobacterial species, all which shared <96% average nucleotide identity with reference Oscillatoriales genomes and are potentially novel species in the genus Microcoleus. One of the Microcoleus species contained the anatoxin-a biosynthesis genes, and we describe the first anatoxin-a gene cluster from the Microcoleus c...Continue Reading

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Citations

Jun 21, 2020·BMC Biology·Alexander L JaffeJillian F Banfield
Sep 26, 2020·Frontiers in Microbiology·Ray ChenBrendan P Burns
Jan 20, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Paula C FureyDaniel L Clemans
Sep 18, 2021·The New Phytologist·Peter T Pellitier, Donald R Zak

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Datasets Mentioned

BETA
PRJNA448579

Methods Mentioned

BETA
GAM

Software Mentioned

BBtools
CheckM
PERMANOVA
ArcGIS
RAxML
Prodigal
R package vegan
gdm
mgcv
R package , vegan

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