Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean

Abstract Phytoplankton community composition is important in establishing ecosystem structure and function. Intuitively, we recognize that water movements must be important for modifying spatial gradients and plankton diversity. However, identifying boundaries and exchange between habitats in the op...

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Main Authors: Jørgen Bendtsen, Lykke Laura Sørensen, Niels Daugbjerg, Nina Lundholm, Katherine Richardson
Format: Article
Language:English
Published: Nature Portfolio 2023-07-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-023-38831-1
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author Jørgen Bendtsen
Lykke Laura Sørensen
Niels Daugbjerg
Nina Lundholm
Katherine Richardson
author_facet Jørgen Bendtsen
Lykke Laura Sørensen
Niels Daugbjerg
Nina Lundholm
Katherine Richardson
author_sort Jørgen Bendtsen
collection DOAJ
description Abstract Phytoplankton community composition is important in establishing ecosystem structure and function. Intuitively, we recognize that water movements must be important for modifying spatial gradients and plankton diversity. However, identifying boundaries and exchange between habitats in the open ocean is not straightforward. Here, we use the abundance of nine phytoplankton species closely sampled in a mesoscale frontal system in the northeastern North Sea as a proxy for community composition and explore the relationship between phytoplankton biogeography and transport patterns. Subsurface community distributions could be related to modeled patterns in water movement. A methodology for analyzing pelagic diversity that includes a representation of plankton community composition and an Eulerian connectivity tracer was developed, and the relative importance of connectivity and geographical distance for phytoplankton species composition analyzed. The connectivity tracer identifies timescales and dispersal barriers in the open ocean. Connectivity was found to be superior in explaining pelagic plankton diversity and found to be a prerequisite for understanding the pelagic phytoplankton composition. This approach is a valuable tool for establishing the link between ocean transports, ecosystem structure and biodiversity and for informing the placement of marine protected areas.
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spelling doaj.art-b8242f5f29c94d139b8e1d49fae8bd182023-07-30T11:15:00ZengNature PortfolioScientific Reports2045-23222023-07-0113111210.1038/s41598-023-38831-1Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open oceanJørgen Bendtsen0Lykke Laura Sørensen1Niels Daugbjerg2Nina Lundholm3Katherine Richardson4Globe Institute, Section for Geobiology, University of CopenhagenMarine Biological Section, Department of Biology, University of CopenhagenMarine Biological Section, Department of Biology, University of CopenhagenNatural History Museum of Denmark, University of CopenhagenGlobe Institute, Section for Biodiversity, University of CopenhagenAbstract Phytoplankton community composition is important in establishing ecosystem structure and function. Intuitively, we recognize that water movements must be important for modifying spatial gradients and plankton diversity. However, identifying boundaries and exchange between habitats in the open ocean is not straightforward. Here, we use the abundance of nine phytoplankton species closely sampled in a mesoscale frontal system in the northeastern North Sea as a proxy for community composition and explore the relationship between phytoplankton biogeography and transport patterns. Subsurface community distributions could be related to modeled patterns in water movement. A methodology for analyzing pelagic diversity that includes a representation of plankton community composition and an Eulerian connectivity tracer was developed, and the relative importance of connectivity and geographical distance for phytoplankton species composition analyzed. The connectivity tracer identifies timescales and dispersal barriers in the open ocean. Connectivity was found to be superior in explaining pelagic plankton diversity and found to be a prerequisite for understanding the pelagic phytoplankton composition. This approach is a valuable tool for establishing the link between ocean transports, ecosystem structure and biodiversity and for informing the placement of marine protected areas.https://doi.org/10.1038/s41598-023-38831-1
spellingShingle Jørgen Bendtsen
Lykke Laura Sørensen
Niels Daugbjerg
Nina Lundholm
Katherine Richardson
Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean
Scientific Reports
title Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean
title_full Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean
title_fullStr Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean
title_full_unstemmed Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean
title_short Phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean
title_sort phytoplankton diversity explained by connectivity across a mesoscale frontal system in the open ocean
url https://doi.org/10.1038/s41598-023-38831-1
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