Nutrient consumption and chain tuning in diatoms exposed to storm-like turbulence

Scientific Reports
Gianluca Dell'AquilaAlberto Amato

Abstract

Current information on the response of phytoplankton to turbulence is linked to cell size and nutrient availability. Diatoms are considered to be favored by mixing as dissolved nutrients are more easily accessible for non-motile cells. We investigated how diatoms exploit microscale turbulence under nutrient repletion and depletion conditions. Here, we show that the chain-forming diatom Chaetoceros decipiens, continues to take up phosphorus and carbon even when silicon is depleted during turbulence. Our findings indicate that upon silica depletion, during turbulence, chain spectra of C. decipiens remained unchanged. We show here that longer chains are maintained during turbulence upon silica depletion whereas under still conditions, shorter chains are enriched. We interpret this as a sign of good physiological state leading to a delay of culture senescence. Our results show that C. decipiens senses and responds to turbulence both in nutrient repletion and depletion. This response is noteworthy due to the small size of the species. The coupling between turbulence and biological response that we depict here may have significant ecological implications. Considering the predicted increase of storms in Northern latitudes this respons...Continue Reading

References

Dec 17, 2008·Applied Microbiology and Biotechnology·Andrew BozarthStefan Zauner
Jul 3, 2009·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Alessandra De MartinoChris Bowler
May 30, 2014·Nature Communications·Fayza DaboussiPhilippe Duchateau
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Apr 18, 2015·New Biotechnology·Weiqi FuSigurður Brynjólfsson
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Jun 10, 2015·Marine Genomics·Alessandra RogatoMaurizio Ribera d'Alcalà
Apr 3, 2016·The Review of Scientific Instruments·Alberto AmatoMaurizio Ribera d'Alcalà
Sep 15, 2016·Physical Review. E·Marco GherardiMarco Cosentino Lagomarsino

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