Cosmopolitan geographic distribution of Phaeosaccion multiseriatum (Phaeosacciaceae, Phaeosacciophyceae), and description of P. westermeieri sp. nov. from Chile
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Akira F. Peters
Akira F. Peters is a retired scientist. Since the beginning of his scientific career in 1980 he has worked on life histories, taxonomy, phylogenetics, ecology, pathology, genetics, development, cultivation and utilisation of marine algae. He has a PhD from Konstanz University, Germany, directs the enterprise Bezhin Rosko and lives near Roscoff in Brittany, NW France. His main techniques are isolation, purification and laboratory cultivation of seaweed microstages.
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Liliana A. Muñoz
Liliana A. Muñoz is a postdoctoral researcher at the i∼mar center, Universidad de Los Lagos, Puerto Montt, Chile. Her MSc (2016; molecular characterization of the marine flora of Easter Island) and PhD (2022; fungal parasites affecting aquaculture facilities in South Africa) are from the University of Aberdeen, Scotland, UK. In her current research, she works on the seaweed holobiont by including fungal species inhabiting macroalgae and exploring their potential roles within their host, as well as their biotechnological application in seaweed aquaculture.
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Niko R. Johansson
Niko R. Johansson is a doctoral researcher in the Finnish Museum of Natural History (Luomus), Helsinki, Finland, working on fungal dispersal ecology. His interests include the biodiversity, ecology, evolution and systematics of algae, fungi and lichens.
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Anastasia Rizouli
,
Michael D. Guiry
Michael D. Guiry is Emeritus professor of Botany at the University of Galway, Ireland. He is founder and director of AlgaeBase.
,
Ga Youn Cho
Ga Youn Cho is a senior researcher at the National Institute of Biological Resources, Korea. She was awarded a PhD at Chungnam National University for the phylogeny of Laminariales. Her research interests are biodiversity, phylogeography, and phylogeny of seaweeds.
and
Frithjof C. Küpper
Abstract
The minute marine multicellular heterokont alga originally described as “Giraudyopsis stellifer” by P.J.L. Dangeard, nom. inval., from Atlantic France, was re-isolated by the germling emergence technique and classified according to psaA and psbC sequences. It is genetically similar (99–100 % identity) to Phaeosaccion multiseriatum R.A. Andersen, L. Graf et H.S. Yoon recently described from the NE Pacific, an ephemeral alga of wide geographical distribution. We isolated it also from substratum samples collected in Korea and the Falkland Islands, where it had not been reported previously. Two isolates of similar morphology from the coast of Chile had the same nuclear ribosomal SSU sequence but differed from P. multiseriatum and P. okellyi R.A. Andersen, L. Graf et H.S. Yoon from New Zealand in psaA and psbC sequences (3–4 % genetic distance). These two isolates are here described as Phaeosaccion westermeieri sp. nov.. Our isolations of P. multiseriatum and P. westermeieri are a further demonstration that the germling emergence technique can reveal microscopic multicellular benthic algae that are easily overlooked in the field.
Funding source: Shackleton Research Fund
Funding source: Scottish Funding Council
Award Identifier / Grant number: MASTS HR09011
Funding source: Natural Environment Research Council
Award Identifier / Grant number: Oceans 2025 – WP 4.5 and grants NE/D521522/1 and
Funding source: Agence Nationale de Recherches
Award Identifier / Grant number: ANR-10-BTBR-04 (IDEALG)
Funding source: FP7 Capacities
Award Identifier / Grant number: ASSEMBLE 227799
Funding source: Ministry of Environment of Korea
Award Identifier / Grant number: NIBR201501118
About the authors
Akira F. Peters is a retired scientist. Since the beginning of his scientific career in 1980 he has worked on life histories, taxonomy, phylogenetics, ecology, pathology, genetics, development, cultivation and utilisation of marine algae. He has a PhD from Konstanz University, Germany, directs the enterprise Bezhin Rosko and lives near Roscoff in Brittany, NW France. His main techniques are isolation, purification and laboratory cultivation of seaweed microstages.
Liliana A. Muñoz is a postdoctoral researcher at the i∼mar center, Universidad de Los Lagos, Puerto Montt, Chile. Her MSc (2016; molecular characterization of the marine flora of Easter Island) and PhD (2022; fungal parasites affecting aquaculture facilities in South Africa) are from the University of Aberdeen, Scotland, UK. In her current research, she works on the seaweed holobiont by including fungal species inhabiting macroalgae and exploring their potential roles within their host, as well as their biotechnological application in seaweed aquaculture.
Niko R. Johansson is a doctoral researcher in the Finnish Museum of Natural History (Luomus), Helsinki, Finland, working on fungal dispersal ecology. His interests include the biodiversity, ecology, evolution and systematics of algae, fungi and lichens.
Michael D. Guiry is Emeritus professor of Botany at the University of Galway, Ireland. He is founder and director of AlgaeBase.
Ga Youn Cho is a senior researcher at the National Institute of Biological Resources, Korea. She was awarded a PhD at Chungnam National University for the phylogeny of Laminariales. Her research interests are biodiversity, phylogeography, and phylogeny of seaweeds.
Acknowledgments
We appreciated assistance in the field by A. Montecinos, M.-L. Guillemin, S. Faugeron, E. Kytinou, Steve Cartwright and K.J. Yoon, and in the laboratory by H. Weitz.
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Research ethics: Not applicable.
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Author contributions: Conceptualization, A.F.P.; methodology, A.F.P.; software, A.F.P., N.J. and L.A.M.; validation, A.F.P.; formal analysis, L.A.M., A.F.P.; investigation, A.F.P., G.Y.C., A.R. and N.J.; resources, A.F.P, G.Y.C. and F.C.K.; data curation, A.F.P.; writing – original draft preparation, A.F.P.; writing – review and editing, A.F.P., M.D.G and all co-authors; visualization, A.F.P.; supervision, A.F.P.; project administration, A.F.P.; funding acquisition, A.F.P, G.Y.C. and F.C.K. The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
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Competing interests: The authors state no conflict of interest.
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Research funding: This work received support to AFP from the EU FP7 “capacities” specific program ASSEMBLE (grant no. 227799), and IDEALG (France: ANR-10-BTBR-04). The Shackleton Research Fund funded a visit of AFP and FCK to the Falkland Islands. FCK received support from the Marine Alliance for Science and Technology for Scotland pooling initiative. MASTS is funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions. FCK also received funding from the UK Natural Environment Research Council (NERC, program Oceans 2025 – WP 4.5 and grants NE/D521522/1 and NE/J023094/1). GYC was supported by the Ministry of Environment of Korea (NIBR201501118).
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Data availability: DNA sequences were submitted to the public database (Genbank/ENA/DDBJ).
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