scholarly journals Microbial community structure in the sea surface microlayer at two contrasting coastal sites in the northwestern Mediterranean Sea

2006 ◽  
Vol 42 ◽  
pp. 91-104 ◽  
Author(s):  
F Joux ◽  
H Agogué ◽  
I Obernosterer ◽  
C Dupuy ◽  
T Reinthaler ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Mediterranean Sea ◽  
Microbial Community Structure ◽  
Sea Surface ◽  
Surface Microlayer ◽  
Sea Surface Microlayer ◽  
Northwestern Mediterranean Sea ◽  
Northwestern Mediterranean

scholarly journals Eukaryotic community composition in the sea surface microlayer across an east-west transect in the Mediterranean Sea

2020 ◽  
Author(s):  
Birthe Zäncker ◽  
Michael Cunliffe ◽  
Anja Engel
Keyword(s):  
Mediterranean Sea ◽  
Community Composition ◽  
Significant Proportion ◽  
Sea Surface ◽  
Surface Microlayer ◽  
Tyrrhenian Sea ◽  
Ionian Sea ◽  
Western Basin ◽  
Sea Surface Microlayer ◽  
The Mediterranean

Abstract. The sea surface microlayer (SML) represents the boundary layer at the air-sea interface. Microbial eukaryotes in the SML potentially influence air-sea gas exchange directly by taking up and producing gases, and indirectly by excreting and degrading organic matter, which may modify the viscoelastic properties of the SML. However, little is known about the controlling factors that influence microbial eukaryote community composition in the SML. We studied the composition of the microbial community, transparent exopolymer particles and polysaccharides in the SML during the PEACETIME cruise along a west-east transect in the Mediterranean Sea, covering the western basin, Tyrrhenian Sea and Ionian Sea. At the stations located in the Ionian Sea, fungi were found in high relative abundances determined by 18S sequencing efforts, making up a significant proportion of the sequences recovered. At the same time, bacterial and phytoplankton counts were decreasing from west to east, while transparent exopolymer particle (TEP) abundance and total carbohydrate (TCHO) concentrations remained the same between Mediterranean basins. Thus, the presence of substrates for fungi, such as Cladosporium known to take up phytoplankton-derived polysaccharides, in combination with decreased substrate competition by bacteria suggests that fungi could be thriving in the neuston of the Ionian Sea.

scholarly journals Nutrient supply controls picoplankton community structure during three contrasting seasons in the northwestern Mediterranean Sea

2016 ◽  
Vol 543 ◽  
pp. 1-19 ◽  
Author(s):  
B Mouriño-Carballido ◽  
E Hojas ◽  
P Cermeño ◽  
P Chouciño ◽  
B Fernández-Castro ◽  
...  
Keyword(s):  
Community Structure ◽  
Mediterranean Sea ◽  
Nutrient Supply ◽  
Northwestern Mediterranean Sea ◽  
Northwestern Mediterranean

scholarly journals Eukaryotic community composition in the sea surface microlayer across an east–west transect in the Mediterranean Sea

2021 ◽  
Vol 18 (6) ◽  
pp. 2107-2118
Author(s):  
Birthe Zäncker ◽  
Michael Cunliffe ◽  
Anja Engel
Keyword(s):  
Mediterranean Sea ◽  
Significant Proportion ◽  
Sea Surface ◽  
Surface Microlayer ◽  
Tyrrhenian Sea ◽  
Ionian Sea ◽  
Western Basin ◽  
Microbial Eukaryotes ◽  
Sea Surface Microlayer ◽  
The Mediterranean

Abstract. The sea surface microlayer (SML) represents the boundary layer at the air–sea interface. Microbial eukaryotes in the SML potentially influence air–sea gas exchange directly by taking up and producing gases and indirectly by excreting and degrading organic matter, which may modify the viscoelastic properties of the SML. However, little is known about the distribution of microbial eukaryotes in the SML. We studied the composition of the microbial community, transparent exopolymer particles and polysaccharides in the SML during the PEACETIME cruise along a west–east transect in the Mediterranean Sea, covering the western basin, Tyrrhenian Sea and Ionian Sea. At the stations located in the Ionian Sea, fungi – likely of continental origin and delivered by atmospheric deposition – were found in high relative abundances, making up a significant proportion of the sequences recovered. Concomitantly, bacterial and picophytoplankton counts decreased from west to east, while transparent exopolymer particle (TEP) abundance and total carbohydrate (TCHO) concentrations remained constant in all basins. Our results suggest that the presence of substrates for fungi, such as Cladosporium, known to take up phytoplankton-derived polysaccharides, in combination with decreased substrate competition by bacteria, might favor fungal dominance in the neuston of the Ionian Sea and other low-nutrient, low-chlorophyll (LNLC) regions.

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