Eukaryotic community composition in the sea surface microlayer across an east–west transect in the Mediterranean Sea
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Published:2021-03-23
Issue:6
Volume:18
Page:2107-2118
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ISSN:1726-4189
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Container-title:Biogeosciences
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language:en
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Short-container-title:Biogeosciences
Author:
Zäncker Birthe, Cunliffe Michael, Engel AnjaORCID
Abstract
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.
Publisher
Copernicus GmbH
Subject
Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics
Reference84 articles.
1. Agogué, H., Casamayor, E. O., Bourrain, M., Obernosterer, I., Joux, F.,
Herndl, G. J., and Lebaron, P.: A survey on bacteria inhabiting the sea
surface microlayer of coastal ecosystems, FEMS Microbiol. Ecol., 54, 269–280,
https://doi.org/10.1016/j.femsec.2005.04.002, 2005. 2. Alldredge, A. L., Passow, U., and Logan, B. E.: The abundance and significance of a class of large, transparent organic particles in the ocean, Deep-Sea Res. Pt. I, 40, 1131–1140, 1993. 3. Amend, A., Burgaud, G., Cunliffe, M., Edgcomb, V. P., Ettinger, C. L., Gutierrez, M. H., Heitman, J., Hom, E. F. Y., Ianiri, G., Jones, A. C., Kagami, M., Picard, K. T., Quandt, C. A., Raghukumar, S., Riquelme, M., Stajich, J., Vargas-muñiz, J., Walker, A. K., Yarden, O., and Gladfelter, A. S.: Fungi in the Marine Environment: Open Questions and Unsolved Problems, MBio, 10, 1–15, 2019. 4. Apts, J. T. H. C. W.: Photosynthetic carbon reduction: high rates in the sea-surface microlayer, Mar. Biol., 101, 411–417, https://doi.org/10.1007/bf00428138, 1989. 5. Azetsu-Scott, K. and Passow, U.: Ascending marine particles: Significance of transparent exopolymer particles (TEP) in the upper ocean, Limnol. Oceanogr., 49, 741–748, https://doi.org/10.4319/lo.2004.49.3.0741, 2004.
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