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

Von Jackowski, A, Becker, KW, Wietz, M, Bienhold, C, Zäncker, B, Nöthig, E-M and Engel, A 2022 Variations of microbial communities and substrate regimes in the eastern Fram Strait between summer and fall. Environmental Microbiology. https://doi.org/10.1111/1462-2920.16036

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Abstract/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.

Item Type:	Publication - Article
Additional Keywords:	Microbial Communities, Substrate Regimes, Fram Strait, Seasonal Variations, Microbial Abundance, Microbial Composition, Biopolymers
Subjects:	Aquaculture Biology Data and Information Marine Sciences
Divisions:	Marine Biological Association of the UK > Other (MBA)
Depositing User:	Tamar Atkinson
Date made live:	24 Jun 2022 13:11
Last Modified:	09 Feb 2024 16:57
URI:	https://plymsea.ac.uk/id/eprint/9729

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