Seasonal development of a tidal mixing front drives shifts in community structure and diversity of bacterioplankton

被引:1
|
作者
King, Nathan G. [1 ,2 ,8 ]
Wilmes, Sophie-B [2 ]
Browett, Samuel S. [3 ,4 ]
Healey, Amy [5 ]
McDevitt, Allan D. [6 ]
McKeown, Niall J. [5 ]
Roche, Ronan [2 ]
Skujina, Ilze [5 ,7 ]
Smale, Dan A. [1 ]
Thorpe, Jamie M. [2 ]
Malham, Shelagh [2 ]
机构
[1] Marine Biol Assoc UK, Plymouth, England
[2] Bangor Univ, Ctr Appl Marine Sci, Sch Ocean Sci, Menai Bridge, Wales
[3] Univ Salford, Environm & Ecosyst Res Ctr, Sch Sci Engn & Environm, Salford, England
[4] South East Technol Univ, Ecoinnovat Res Ctr, Sch Sci & Comp, Mol Ecol Res Grp, Waterford, Ireland
[5] Aberystwyth Univ, Dept Life Sci, Aberystwyth, Wales
[6] Atlantic Technol Univ, Dept Nat Resources & Environm, Galway, Ireland
[7] Univ Coll Dublin, Sch Biol & Environm Sci, Dublin, Ireland
[8] Marine Biol Assoc UK, Plymouth PL1 2PB, England
基金
英国科研创新办公室;
关键词
16S sequencing; Celtic Sea front; microbial biogeography; microbiome; Shallow Sea front; BACTERIAL BIOGEOGRAPHY; PHYTOPLANKTON BLOOMS; SPATIAL VARIABILITY; NORTH-SEA; MARINE; DYNAMICS; PROCHLOROCOCCUS; DISTRIBUTIONS; CYANOBACTERIA; SUCCESSION;
D O I
10.1111/mec.17097
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Bacterioplankton underpin biogeochemical cycles and an improved understanding of the patterns and drivers of variability in their distribution is needed to determine their wider functioning and importance. Sharp environmental gradients and dispersal barriers associated with ocean fronts are emerging as key determinants of bacterioplankton biodiversity patterns. We examined how the development of the Celtic Sea Front (CF), a tidal mixing front on the Northwest European Shelf affects bacterioplankton communities. We performed 16S-rRNA metabarcoding on 60 seawater samples collected from three depths (surface, 20 m and seafloor), across two research cruises (May and September 2018), encompassing the intra-annual range of the CF intensity. Communities above the thermocline of stratified frontal waters were clearly differentiated and less diverse than those below the thermocline and communities in the well-mixed waters of the Irish Sea. This effect was much more pronounced in September, when the CF was at its peak intensity. The stratified zone likely represents a stressful environment for bacterioplankton due to a combination of high temperatures and low nutrients, which fewer taxa can tolerate. Much of the observed variation was driven by Synechococcus spp. (cyanobacteria), which were more abundant within the stratified zone and are known to thrive in warm oligotrophic waters. Synechococcus spp. are key contributors to global primary productivity and carbon cycling and, as such, variability driven by the CF is likely to influence regional biogeochemical processes. However, further studies are required to explicitly link shifts in community structure to function and quantify their wider importance to pelagic ecosystems.
引用
收藏
页码:5201 / 5210
页数:10
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