Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front

Abstract Oceanic physics at fine scale; e.g. eddies, fronts, filaments; are notoriously difficult to sample. However, an increasing number of theoretical approaches hypothesize that these processes affect phytoplankton diversity which have cascading effects on regional ecosystems. In 2015, we target...

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Autores principales:	Pierre Ramond, Raffaele Siano, Sophie Schmitt, Colomban de Vargas, Louis Marié, Laurent Memery, Marc Sourisseau
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3db82d75949c4e52afab45e1082d9339
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spelling	oai:doaj.org-article:3db82d75949c4e52afab45e1082d93392021-12-02T14:16:42ZPhytoplankton taxonomic and functional diversity patterns across a coastal tidal front10.1038/s41598-021-82071-02045-2322https://doaj.org/article/3db82d75949c4e52afab45e1082d93392021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82071-0https://doaj.org/toc/2045-2322Abstract Oceanic physics at fine scale; e.g. eddies, fronts, filaments; are notoriously difficult to sample. However, an increasing number of theoretical approaches hypothesize that these processes affect phytoplankton diversity which have cascading effects on regional ecosystems. In 2015, we targeted the Iroise Sea (France) and evidenced the setting up of the Ushant tidal front from the beginning of spring to late summer. Seawater samples were taken during three sampling cruises and DNA-barcoding allowed us to investigate patterns of eukaryotic phytoplankton diversity across this front. First focusing on patterns of taxonomic richness, we evidenced that the front harbored a hotspot of eukaryotic phytoplankton diversity sustained throughout summer. We then detail the ecological processes leading to the formation of this hotspot by studying shifts in community composition across the Iroise Sea. Physical mixing mingled the communities surrounding the front, allowing the formation of a local ecotone, but it was cycles of disturbances and nutrient inputs over the front that allowed a decrease in competitive exclusion, which maintained a higher diversity of rare phytoplankton taxa. These processes did not select a specific ecological strategy as inferred by a trait approach coupled to our taxonomic approach. Instead the front favored higher richness within widespread strategies, resulting in functional redundancy. We detail how fine-scale ocean physics affect phytoplankton diversity and suppose that this interplay is a major control on regional ecosystems.Pierre RamondRaffaele SianoSophie SchmittColomban de VargasLouis MariéLaurent MemeryMarc SourisseauNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Pierre Ramond Raffaele Siano Sophie Schmitt Colomban de Vargas Louis Marié Laurent Memery Marc Sourisseau Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front
description	Abstract Oceanic physics at fine scale; e.g. eddies, fronts, filaments; are notoriously difficult to sample. However, an increasing number of theoretical approaches hypothesize that these processes affect phytoplankton diversity which have cascading effects on regional ecosystems. In 2015, we targeted the Iroise Sea (France) and evidenced the setting up of the Ushant tidal front from the beginning of spring to late summer. Seawater samples were taken during three sampling cruises and DNA-barcoding allowed us to investigate patterns of eukaryotic phytoplankton diversity across this front. First focusing on patterns of taxonomic richness, we evidenced that the front harbored a hotspot of eukaryotic phytoplankton diversity sustained throughout summer. We then detail the ecological processes leading to the formation of this hotspot by studying shifts in community composition across the Iroise Sea. Physical mixing mingled the communities surrounding the front, allowing the formation of a local ecotone, but it was cycles of disturbances and nutrient inputs over the front that allowed a decrease in competitive exclusion, which maintained a higher diversity of rare phytoplankton taxa. These processes did not select a specific ecological strategy as inferred by a trait approach coupled to our taxonomic approach. Instead the front favored higher richness within widespread strategies, resulting in functional redundancy. We detail how fine-scale ocean physics affect phytoplankton diversity and suppose that this interplay is a major control on regional ecosystems.
format	article
author	Pierre Ramond Raffaele Siano Sophie Schmitt Colomban de Vargas Louis Marié Laurent Memery Marc Sourisseau
author_facet	Pierre Ramond Raffaele Siano Sophie Schmitt Colomban de Vargas Louis Marié Laurent Memery Marc Sourisseau
author_sort	Pierre Ramond
title	Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front
title_short	Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front
title_full	Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front
title_fullStr	Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front
title_full_unstemmed	Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front
title_sort	phytoplankton taxonomic and functional diversity patterns across a coastal tidal front
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3db82d75949c4e52afab45e1082d9339
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Phytoplankton taxonomic and functional diversity patterns across a coastal tidal front

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