Variations of microbial communities and substrate regimes in the eastern Fram Strait between summer and fall

Summary Seasonal variations in day length and temperature, in combination with dynamic factors such as advection from the North Atlantic, influence primary production and the microbial loop in the Fram Strait. Here, we investigated the seasonal variability of biopolymers, microbial abundance and mic...

Full description

Saved in:
Bibliographic Details
Published in:Environmental microbiology 2022-09, Vol.24 (9), p.4124-4136
Main Authors: Jackowski, Anabel, Becker, Kevin W., Wietz, Matthias, Bienhold, Christina, Zäncker, Birthe, Nöthig, Eva‐Maria, Engel, Anja
Format: Article
Language:English
Subjects:
Abundance
Biopolymers
Flow cytometry
Gene sequencing
Microbial activity
Microorganisms
Photoperiods
Polar environments
Polymers
Polysaccharides
Primary production
Relative abundance
rRNA 16S
Seasonal variation
Seasonal variations
Substrates
Summer
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Summary Seasonal variations in day length and temperature, in combination with dynamic factors such as advection from the North Atlantic, influence primary production and the microbial loop in the Fram Strait. Here, we investigated the seasonal variability of biopolymers, microbial abundance and microbial composition within the upper 100 m during summer and fall. Flow cytometry revealed a shift in the autotrophic community from picoeukaryotes dominating in summer to a 34‐fold increase of Synechococcus by fall. Furthermore, a significant decline in biopolymers concentrations covaried with increasing microbial diversity based on 16S rRNA gene sequencing along with a community shift towards fewer polymer‐degrading genera in fall. The seasonal succession in the biopolymer pool and microbes indicates distinct metabolic regimes, with a higher relative abundance of polysaccharide‐degrading genera in summer and a higher relative abundance of common taxa in fall. The parallel analysis of DOM and microbial diversity provides an important baseline for microbe–substrate relationships over the seasonal cycle in the Arctic Ocean.
ISSN:1462-2912
1462-2920
DOI:10.1111/1462-2920.16036