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Molecular insights into hidden diversity of the epilithic green algae in Chishui River, China Eur. J. Phycol. (IF 2.4) Pub Date : 2024-03-08 Benwen Liu, Yukang Liu, Qingyu Dai, Huan Zhu, Guoxiang Liu
Epilithic green algae play crucial roles in aquatic ecosystems. While traditional morphological approaches have provided valuable insights into these algae, their limitations in resolving cryptic s...
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Optimizing the biomass balance of macroalgae and sea urchins in kelp beds by removing the urchins Eur. J. Phycol. (IF 2.4) Pub Date : 2024-02-27 Shoichi Akaike, Hiroyuki Mizuta
In this study, we conducted sea urchin removal (SUR) experiments at two sites along Hokkaido’s southwestern and northwestern coasts in the Sea of Japan and one site along the northeast coast in the...
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Workshops Eur. J. Phycol. (IF 2.4) Pub Date : 2024-02-29
Published in European Journal of Phycology (Ahead of Print, 2024)
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A novel sexual system in male gametophytes of Laminaria pallida (Phaeophyceae) Eur. J. Phycol. (IF 2.4) Pub Date : 2024-02-27 Pierre Liboureau, Gareth A. Pearson, Ester A. Serrão, Anja Kreiner, Neusa Martins
Brown algae (Phaeophyceae) exhibit a wide diversity of sexual systems, reproductive modes and life histories. The evolution of this diversity has often involved transitions between sexual systems, ...
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Physiological differences among cryptic species of the Mediterranean crustose coralline alga Lithophyllum stictiforme (Corallinales, Rhodophyta) Eur. J. Phycol. (IF 2.4) Pub Date : 2023-12-23 Sophie Martin, Virgile Calvert, Anne Chenuil
The crustose coralline alga Lithophyllum stictiforme is an important reef builder, forming coralligenous concretions in the Mediterranean Sea. This algal species complex is composed of eight crypti...
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Morpho-molecular characterization of sand-dwelling dinoflagellate communities from the German Wadden Sea and insights into their spatiotemporal distribution Eur. J. Phycol. (IF 2.4) Pub Date : 2023-12-23 Albert Reñé, Natàlia Timoneda, Sahar Khodami, Purificación López-García, Pedro Martinez Arbizu, Mona Hoppenrath
Benthic protist communities, including sand-dwelling dinoflagellates, are still poorly characterized worldwide and there is a lack of knowledge on their diversity and spatiotemporal dynamics. In th...
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Factors contributing to the potential expansion of Limnomonas gaiensis (Chlamydomonadales, Chlorophyta) in freshwater lakes in Northern Europe Eur. J. Phycol. (IF 2.4) Pub Date : 2023-12-07 Sirje Sildever, Rebecca I.A. Stewart, Sylvie V.M. Tesson
Limnomonas gaiensis is a recently described green microalga inhabiting freshwater lakes in northern Europe (England, Sweden). There is little information on the species’ tolerance to environmental ...
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Non-indigenous seaweeds in the Northeast Atlantic Ocean, the Mediterranean Sea and Macaronesia: a critical synthesis of diversity, spatial and temporal patterns Eur. J. Phycol. (IF 2.4) Pub Date : 2023-11-28 Luna M. van der Loos, Quinten Bafort, Samuel Bosch, Enric Ballesteros, Ignacio Bárbara, Estibaliz Berecibar, Aurélie Blanfuné, Kenny Bogaert, Silke Bouckenooghe, Charles-François Boudouresque, Juliet Brodie, Ester Cecere, Pilar Díaz-Tapia, Aschwin H. Engelen, Karl Gunnarson, Soha Hamdy Shabaka, Razy Hoffman, Vivian Husa, Álvaro Israel, Mart Karremans, Jessica Knoop, Line Le Gall, Christine A. Maggs
Effective monitoring of non-indigenous seaweeds and combatting their effects relies on a solid confirmation of the non-indigenous status of the respective species. We critically analysed the status...
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Biodiversity of Tehran freshwater cyanobacteria and remote sensing analysis of reservoirs Eur. J. Phycol. (IF 2.4) Pub Date : 2023-11-09 Yasaman Tavakoli, Fatemeh Mohammadipanah, Saeid Hamzeh, Amir Sedighi
Analysis of cyanobacterial diversity is an important step towards identifying new biological resources for production of bioactive compounds. In this study cyanobacterial surface coverage was asses...
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Phylogenetic analysis of invasive genus Lophocladia (Rhodomelaceae, Rhodophyta) reveals synonymy of L. lallemandii with L. trichoclados and first record of L. kuetzingii in the NE Atlantic Eur. J. Phycol. (IF 2.4) Pub Date : 2023-11-01 Raül Golo, Emma Cebrian, Pilar Díaz-Tapia, Petra Lucic, Razzy Hoffman, Alba Vergés
Species identification in red algae poses significant challenges when relying solely on morphological characteristics. Consequently, the absence of molecular information often conceals misidentific...
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The pH tolerance range of the airborne species Tetracystis vinatzeri (Chlorophyceae, Chlamydomonadales) Eur. J. Phycol. (IF 2.4) Pub Date : 2023-10-20 Sylvie V.M. Tesson, Sirje Sildever
To decipher the dispersal range of the cosmopolitan green microalga Tetracystis vinatzeri, two airborne-collected strains were barcoded using the 18S ribosomal DNA gene (18S) and the mitochondrial ...
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Enhanced reducing sugar production and extraction for Chlorella vulgaris in mixotrophic cultivation using high hydrostatic pressure processing and ultrasound Eur. J. Phycol. (IF 2.4) Pub Date : 2023-10-10 Sibel Uzuner, Sebnem Kurhan, Gulsun Akdemir Evrendilek
Although extraction of polysaccharides to convert reducing sugars (RS) from microalgae by acid or alkali pretreatments and enzymatic hydrolysis has been extensively studied, few reports exploring t...
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Genetic and phenotypic intra-species diversity of alga Tisochrysis lutea reveals original genetic structure and domestication potential Eur. J. Phycol. (IF 2.4) Pub Date : 2023-09-29 Grégory Carrier, Jérémy Berthelier, Agathe Maupetit, Elodie Nicolau, Martial Marbouty, Nathalie Schreiber, Aurélie Charrier, Clémence Carcopino, Laura Leroi, Bruno Saint-Jean
Oceanic phytoplankton species are generally composed of many strains, with intra-species diversity consisting of genetic and phenotypic variability. Despite its importance in ecological and biotech...
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Tracing the introduction of Dictyota acutiloba (Dictyotales, Phaeophyceae) in the Mediterranean Sea, with a reassessment of its geographic distribution Eur. J. Phycol. (IF 2.4) Pub Date : 2023-06-23 Soria Delva, Camino Fernández de la Hoz, Quinten Bafort, Sofie D’hondt, Soha Shabaka, Sarah Hamdy Rashedy, Alison R. Sherwood, Tamar Guy-Haim, Alvaro Israel, Olivier De Clerck
In this study we explore the introduction of the brown alga Dictyota acutiloba in the Mediterranean Sea and provide a substantive update on the geographic distribution of this species, which was lo...
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Morphological and taxonomic implications of the formation of colonies in Cyclostephanos and Stephanodiscus (Bacillariophyta) Eur. J. Phycol. (IF 2.4) Pub Date : 2023-06-23 Konrad Schultz, Mirko Dreßler, Olivier Jacques, Marcus Frank, Armin Springer, Thomas Hübener
The importance of diatoms in bioindication and palaeolimnology is significant. For these applications, and species identification in general, a sound understanding of morphological variability is e...
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Trait trade-offs in phagotrophic microalgae: the mixoplankton conundrum Eur. J. Phycol. (IF 2.4) Pub Date : 2023-06-20 Aditee Mitra, Kevin J. Flynn, Diane K. Stoecker, John A. Raven
Analysis of trait trade-offs, through which physiological traits requiring common resources are ‘traded’ to optimize competitive advantage, provides a route to simplify and more readily understand ...
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Description of Gloeomargarita ahousahtiae sp. nov. (Gloeomargaritales), a thermophilic cyanobacterium with intracellular carbonate inclusions Eur. J. Phycol. (IF 2.4) Pub Date : 2023-06-15 Thomas Bacchetta, Purificación López-García, Ana Gutiérrez-Preciado, Neha Mehta, Feriel Skouri-Panet, Karim Benzerara, Maria Ciobanu, Naoji Yubuki, Rosaluz Tavera, David Moreira
A unicellular cyanobacterium, strain VI4D9, was isolated from thermophilic microbial mats thriving in a hot spring of the Ahousaht territory of Vancouver Island, Canada, and characterized using opt...
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Isotopic and biochemical composition of Western Mediterranean macroalgae Eur. J. Phycol. (IF 2.4) Pub Date : 2023-06-05 Pierre Cresson, Sandrine Ruitton, Fanny Noisette, Mireille Harmelin-Vivien
Among marine primary producers, macroalgae support complex and productive coastal food webs, but coastal primary production relies on terrigenous inputs and remineralized organic matter which both ...
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Temporal model of photosynthesis by measuring the instantaneous photosynthetic rate of cyanobacteria under pulsed light Eur. J. Phycol. (IF 2.4) Pub Date : 2023-04-14 Xiaolin Zhang, Jiaohong Zhao, Wenqi Li, Jiali Yang, Weimin Ma, Muqing Liu
Improving the efficiency of photosynthesis has important theoretical and practical value, and the application of pulsed light is an effective strategy for this goal. This study explored the theoret...
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Buoyancy control of Microcystis using different light regimes combined with extracellular polysaccharides and cationic ions Eur. J. Phycol. (IF 2.4) Pub Date : 2023-04-03 Thoriq Teja Samudra, Hiroaki Takahashi, Yoshimasa Amano, Motoi Machida
Cyanobacterial blooms are widely known to cause problems in the aquatic environment, and their appearance has become more frequent due to global warming. Microcystis is one of the most widespread a...
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Taxonomic revision of Tinocladia (Ectocarpales s.l., Phaeophyceae): merger of Tinocladia with Eudesme and description of E. pseudocrassa sp. nov Eur. J. Phycol. (IF 2.4) Pub Date : 2023-03-28 Hiroshi Kawai, Kazusa Takeuchi, Takeaki Hanyuda, Juliet Brodie, Rob Mrowicki, Kathy Ann Miller, Wendy Nelson
A molecular phylogeny of Tinocladia and Eudesme based on specimens covering a large proportion of the known species was done using mitochondrial cox1 and cox3, chloroplast atpB, psaA, psbA and rbcL...
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Morphological and molecular investigations shed light on diversity and distribution of Palmariaceae in the north-western Pacific Eur. J. Phycol. (IF 2.4) Pub Date : 2023-03-22 Anna V. Skriptsova, Svetlana Shibneva, Alexander A. Semenchenko
Traditional morphology-based investigations of the red algal genera Devaleraea and Palmaria (Palmariaceae, Rhodophyta) fail to provide accurate accounts of diversity and distribution for species fr...
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New genera of thin homocyted cyanobacteria from Brazilian tropical and subtropical marine islands Eur. J. Phycol. (IF 2.4) Pub Date : 2023-03-03 Valter Loureiro de Araújo, Márcio Ferreira dos Santos, Alessandra Selbach Schnadelbach, José Marcos de Castro Nunes, Taiara Aguiar Caires
Brazil’s Atlantic Ocean coast is approximately 7500 km long, with several coastal and oceanic islands. The cyanoflora of this area is not commonly included in published studies, resulting in an und...
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Diversity of the genus Avrainvillea (Dichotomosiphonaceae, Chlorophyta): new insights and eight new species Eur. J. Phycol. (IF 2.4) Pub Date : 2023-02-24 Laura Lagourgue, Florence Rousseau, Mayalen Zubia, Claude E. Payri
Avrainvillea is a green macroalgal genus of the family Dichotomosiphonaceae (order Bryopsidales). Many species have been morphologically described, but few studies have addressed the genetic divers...
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First draft of an annotated genome for a lichenised strain of the green alga Diplosphaera chodatii (Prasiolales, Trebouxiophyceae) Eur. J. Phycol. (IF 2.4) Pub Date : 2023-02-21 Cécile Gueidan, Oliver L. Mead, Hadi Nazem-Bokaee, Sarah Mathews
Although genome sequences of lichenized fungi are increasingly becoming available, genome sequences of microalgae involved in the lichen symbiosis are still scarce. For lichenized eukaryotic algae,...
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Photosynthetic traits of the ubiquitous and prolific macroalga Ulva (Chlorophyta): a review Eur. J. Phycol. (IF 2.4) Pub Date : 2022-12-20 Sven Beer
Ulva is an opportunistically growing green macroalgal genus, the worldwide distribution of which can partly be explained by its ability to employ two alternative modes of photosynthetic inorganic c...
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Freezing and desiccation tolerance in the Antarctic bangiophyte Pyropia endiviifolia (Rhodophyta): a chicken and egg problem? Eur. J. Phycol. (IF 2.4) Pub Date : 2022-11-24 José Ignacio García-Plazaola, Miren Irati Arzac, Laura Brazales, Javier Fernández, José Manuel Laza, José Luis Vilas, Marina López-Pozo, Alicia V. Perera-Castro, Beatriz Fernández-Marín
Antarctic macroalgal communities of the upper intertidal zone are particularly poor compared with other coastal regions. Exposure to desiccation and freezing combined with the abrasive effect of ic...
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DNA barcoding reveals cryptic diversity, taxonomic conflicts and novel biogeographical insights in Cystoseira s.l. (Phaeophyceae) Eur. J. Phycol. (IF 2.4) Pub Date : 2022-10-31 João Neiva, Ricardo Bermejo, Alba Medrano, Pol Capdevila, David Milla-Figueras, Pedro Afonso, Enric Ballesteros, Brahim Sabour, Donatella Serio, Eduardo Nóbrega, João Soares, José Valdazo, Fernando Tuya, Martina Mulas, Álvaro Israel, Sofia S. Sadogurska, Michael D. Guiry, Gareth A. Pearson, Ester A. Serrão
ABSTRACT Cystoseira sensu lato (s.l.) – encompassing the genera Cystoseira sensu stricto (s.s.), Ericaria and Gongolaria – is a diverse group of forest-forming brown macroalgae endemic to the warm-temperate North-east Atlantic. These algae have immense biogeographic and ecological significance and have been experiencing recent regional declines. Most Cystoseira s.l. display important morphological
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Two new species of Pyramimonas (Pyramimonadophyceae, Chlorophyta) associated with the subgenus Trichocystis from coral lagoons of the Ryukyu Archipelago, Japan Eur. J. Phycol. (IF 2.4) Pub Date : 2022-10-14 Stuart D. Sym, Shoichiro Suda, Takeo Horiguchi
ABSTRACT The characteristics of two new benthic species of Pyramimonas isolated from coral rubble have been determined. One, P. superba sp. nov., most similar to P. lunata, has a morphological character suite and molecular phylogenetic signal supporting it as a member of the subgenus Trichocystis, despite its uniqueness in producing mucilage. The other, P. lamellipunctata sp. nov., also shows phylogenetic
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Vegetative cell enlargement in selected centric diatom species – an alternative way to propagate an individual genotype Eur. J. Phycol. (IF 2.4) Pub Date : 2022-09-12 Irena Kaczmarska, James M. Ehrman, Kelsey E. Mills, Steven G. Sutcliffe, Brajogopal Samanta
ABSTRACT Vegetative cell enlargement (VCE) and structures involved are documented for the first time using epifluorescence and electron microscopy. We examined three centric diatom species with polar and non-polar valve outlines. VCE progressed in two ways. The first involved liberation of the protoplast, nearly isodiametric expansion, and building of the large frustule in a more or less spherical
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Seasonal ecophysiology of Fucus vesiculosus (Phaeophyceae) in the Northern Baltic Sea Eur. J. Phycol. (IF 2.4) Pub Date : 2022-09-08 Antti Takolander
ABSTRACT The brown macroalga Fucus vesiculosus is a foundation species in temperate rocky shores, subjected to seasonally fluctuating environmental conditions. To obtain a more complete picture of the seasonality of F. vesiculosus ecophysiology in the northern Baltic Sea, in situ photochemistry, elemental ratios and chlorophyll a and c content of the alga were investigated in field campaigns conducted
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Regional microbiome differentiation of the invasive Sargassum muticum (Fucales, Phaeophyceae) follows the generalist host hypothesis across the North East Atlantic Eur. J. Phycol. (IF 2.4) Pub Date : 2022-08-30 Tânia Aires, Anita Kläui, Aschwin Engelen
ABSTRACT Over 90% of introduced marine species are seaweeds. Seaweeds rely on their microbiome for host settlement, nutrition, development and health. As such, it is likely that microbiomes are involved in seaweed invasions. Sargassum muticum, indigenous to Southeast Asia, inhabits the North-east Atlantic from Norway to Morocco. This is the only known successful case of a non-clonal marine invader
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The productivity effects of macroalgal biochar from Ulva Linnaeus bloom species on Arabidopsis thaliana Linnaeus seedlings Eur. J. Phycol. (IF 2.4) Pub Date : 2022-08-23 Finlay Kenneth, Catherine F.H. Joniver, William Meredith, Jessica M.M. Adams
ABSTRACT Intensive agricultural practices and poor management of organic waste have adverse effects on aquatic ecosystems, where excessive macroalgal proliferation can occur to form ‘green tides’, with negative environmental, ecological and socioeconomic impacts. One novel method for converting a problematic material into a valuable resource is to use excess algal biomass as a feedstock for biochar
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Diversity, systematics and biogeography of French Polynesian Lobophora (Dictyotales, Phaeophyceae) Eur. J. Phycol. (IF 2.4) Pub Date : 2022-08-10 Christophe Vieira, Olivier De Clerck, Antoine De Ramon N’Yeurt, Sofie D’hondt, Laurent Millet, Myung Sook Kim, Claude Payri, Mayalen Zubia
ABSTRACT We re-evaluated the diversity of Lobophora using an integrative taxonomic approach based on a broad sampling across French Polynesian archipelagos. Our results show that French Polynesia supports at least 37 Lobophora species of which ~57% (21) are endemic. This level of endemicity is comparable to that presently known in the Caribbean and the western Indian Ocean, while French Polynesian
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First records of the non-indigenous green algal species Siphonocladus tropicus (Cladophorales, Chlorophyta) and Caulerpa integerrima (Bryopsidales, Chlorophyta) in the Mediterranean Sea Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-26 Razy Hoffman, Olivier De Clerck, Frederik Leliaert
ABSTRACT We provide an account of two newly recorded non-indigenous tropical seaweed species, Siphonocladus tropicus (Cladophorales, Chlorophyta) and Caulerpa integerrima (Caulerpaceae, Chlorophyta), from the northern and central Levantine Mediterranean shores of Israel. Reports are supported by morphological and molecular evidence. The new record of C. integerrima, thought to be endemic to the Red
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Cell fine structure and phylogeny of Parvodinium: towards an ultrastructural characterization of the Peridiniopsidaceae (Dinophyceae) Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-25 Mariana S. Pandeirada, Sandra C. Craveiro, Niels Daugbjerg, Øjvind Moestrup, António J. Calado
Abstract Recent molecular phylogenies that include species of Parvodinium revealed as its closest relatives the genera Peridiniopsis, Palatinus and Johsia. The clade containing these taxa is currently recognized as a family, Peridiniopsidaceae. The affinity between the members of Peridiniopsidaceae cuts across traditional boundaries based on features of the amphiesma, most notably the presence or absence
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Nannochloropsis oceanica (Eustigmatophyceae) mutants resistant to rose bengal demonstrate high tolerance to oxygen Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-25 Cecilia Faraloni, Giuseppe Torzillo, Avigad Vonshak
ABSTRACT The genus Nannochloropsis (Eustigmatophyceae), including N. oceanica, has attracted considerable interest, due to its ability to accumulate high levels of lipids. Under large-scale cultivation outdoors, cells are exposed to a combination of high oxygen and light irradiance conditions that may promote photoinhibition, so selecting strains able to tolerate oxidative stress is desirable. Rose
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Galactolipids of the genus Amphidinium (Dinophyceae): an hypothesis that they are basal to those of other peridinin-containing dinoflagellates Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-21 Jeffrey D. Leblond, Lindsey C. Elkins, Jori E. Graeff, Kyra Sabir
ABSTRACT The genus Amphidinium is shown in many phylogenies to be basal to other peridinin-containing, photosynthetic dinoflagellates as one of the first photosynthetic genera to arise after the evolution of heterotrophic genera. As part of our continuing examination of the plastid-associated galactolipids, namely mono- and digalactosyldiacylglycerol (MGDG and DGDG, respectively), in dinoflagellates
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Trebonskia zoosporica, gen. et sp. nov., a new member of the Goniochloridales (Eustigmatophyceae, Stramenopiles) with an unusual mode of reproduction Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-20 Pavel Přibyl, Lenka Procházková
ABSTRACT A new freshwater microalgal isolate, CCALA 1135, was characterized using a polyphasic approach (morphology, ultrastructure, fatty acid composition, 18S rRNA gene and rbcL analyses). Non-motile vegetative cells were spherical with thick, smooth cell walls lacking ornamentation, with multiple overlapping chloroplasts and sometimes more than one red globule in the cytoplasm. The nuclear and chloroplast
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Parental environment modulates offspring thermal tolerance in a foundational intertidal seaweed Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-20 Raquel Sánchez de Pedro, Andrea N. Fernández, María Jesús García-Sánchez, Antonio Flores-Moya, Elena Bañares-España
Abstract Thermotolerance acquisition is an important ecophysiological trait under global warming scenarios because it can allow organisms and populations to adapt, particularly during the most sensitive early stages of a life cycle. Here we used seasonality as a natural scenario to explore whether parental thermal histories can modulate thermotolerance of recruits of a canopy-forming intertidal seaweed
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Dynamic Cell Imaging: application to the diatom Phaeodactylum tricornutum under environmental stresses Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-19 Houda Bey, Florent Charton, Helena Cruz de Carvalho, Shun Liu, Richard G. Dorrell, Chris Bowler, Claude Boccara, Martine Boccara
ABSTRACT The dynamic movement of cell organelles is an important and poorly understood component of cellular organization and metabolism. In this work we present a non-invasive non-destructive method (Dynamic Cell Imaging, DCI) based on light scattering and interferometry to monitor dynamic events within photosynthetic cells using the diatom Phaeodactylum tricornutum as a model system. For this monitoring
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Distribution, identification and cytotoxicity of Gambierdiscus (Dinophyceae) in the Atlantic Selvagens Islands (Madeira, Portugal): a ciguatera gateway to Europe Eur. J. Phycol. (IF 2.4) Pub Date : 2022-07-18 Lia Godinho, Lucía Soliño, Catarina Churro, Viriato Timoteo, Carolina Santos, Neide Gouveia, Jorge Diogène, Pedro Reis Costa
ABSTRACT The emerging threat of ciguatera poisoning (CP) in Europe has been associated with fish captured in the Canary Islands (Spain) and Selvagens Islands (Portugal). The first are heavily populated islands where numerous scientific studies have been carried out. Conversely, the Selvagens Islands as a nature reserve with low human pressure have been rarely surveyed in terms of the marine benthic
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Hidden diversity of Chlorococcum (Chlorophyta) in a shallow temporary freshwater lake: description of Chlorococcum szentendrense sp. nov Eur. J. Phycol. (IF 2.4) Pub Date : 2022-06-13 Erika Greipel, József Kutasi, Katalin Solymosi, Hajnalka Nagy, Tamás Felföldi
ABSTRACT Chlorococcum is a coccoid green algal genus, which contains almost 50 species. The genus is polyphyletic, but in a traditional sense, the cells are coccoid and non-motile with a cup-shape chloroplast in the vegetative stage, while the spores have chlamydomonad appearance. They are distributed worldwide mainly in terrestrial habitats, and the biotechnological potential of several strains has
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Using geometric morphometrics to disentangle Didymosphenia hullii and D. geminata (Bacillariophyceae) from Connecticut, USA, and two congeneric relatives Eur. J. Phycol. (IF 2.4) Pub Date : 2022-06-08 Diba A. Khan-Bureau, Saúl Blanco, Eduardo A. Morales, Luc Ector, Michael S. Beauchene, Louise A. Lewis
ABSTRACT Two morphologically similar populations of Didymosphenia were reported from the West Branch of the Farmington River, Connecticut, USA in 2014 and 2016. We described one of them as a new species, D. hullii. The other was observed subsequently in late 2016 and resembled D. geminata, but given the worldwide nuisance characteristic of this species, the identification required confirmation. In
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Paradoxical failure of Laminaria ochroleuca (Laminariales, Phaeophyceae) to consolidate a kelp forest inside a Marine National Park Eur. J. Phycol. (IF 2.4) Pub Date : 2022-05-25 Sara Barrientos, Rodolfo Barreiro, Cristina Piñeiro-Corbeira
ABSTRACT Kelp forests, one of the world’s most productive ecosystems, have been in decline in many regions in recent years. Climate change, through steady sea warming or marine heatwaves, has led to the disappearance of entire populations, although kelp forest decline may also depend on non-climatic stressors such as grazing. Since the impacts of climate change are projected to continue to intensify
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Physiological characterisation of the calcified alga Corallina officinalis (Rhodophyta) from the leading to trailing edge in the Northeast Atlantic Eur. J. Phycol. (IF 2.4) Pub Date : 2022-05-20 Regina Kolzenburg, Daniel James Coaten, Federica Ragazzola
Abstract Intertidal macroalgae are exposed to many biotic and abiotic stressors, including significant fluctuations in environmental parameters such as salinity, temperature, pH and solar radiation. This study characterized populations of the intertidal calcifying red alga Corallina officinalis across its geographic distribution in the North-east Atlantic. Processes examined included primary production
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Distinct physiological responses of Coccolithus braarudii life cycle phases to light intensity and nutrient availability Eur. J. Phycol. (IF 2.4) Pub Date : 2022-05-04 Gerald Langer, Vun Wen Jie, Dorothee Kottmeier, Serena Flori, Daniela Sturm, Joost de Vries, Glenn M. Harper, Colin Brownlee, Glen Wheeler
ABSTRACT Coccolithophores feature a haplo-diplontic life cycle comprised of diploid cells producing heterococcoliths and haploid cells producing morphologically different holococcoliths. These life cycle phases of each species appear to have distinct spatial and temporal distributions in the oceans, with the heavily calcified heterococcolithophores (HET) often more prevalent in winter and at greater
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Phosphate affects susceptivity of Sarcodia suae to arsenate Eur. J. Phycol. (IF 2.4) Pub Date : 2022-04-13 Mary Joy Halog Libatique, Han-Yang Yeh, Fan-Hua Nan, Meng-Chou Lee
ABSTRACT Algal susceptivity to inorganic arsenate As(V) is linked to the plant nutrient phosphate due to their similar uptake processes. This study determines the response of Sarcodia suae to three phosphate concentrations (1, 10 and 20 mg l–1) when exposed to As(V) (0, 250 µg l–1) for 7 days. The parameters measured include growth, pigments (Chlorophyll a (Chl a), allophycocyanin (APC), phycocyanin
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Mitochondrial genome structure, phylogenetic analyses and substitution rate estimation of the Oedogoniales Eur. J. Phycol. (IF 2.4) Pub Date : 2022-04-04 Qian Xiong, Jiaqing Wang, Yuxin Hu, Qinghua Wang, Guoxiang Liu, Zhengyu Hu
Abstract The order Oedogoniales comprises three genera, Oedogonium, Oedocladium and Bulbochaete, which were classified based on traditional morphological criteria, and includes more than 600 described species. This group is economically important in astaxanthin production and the energy sector. However, only one mitochondrial genome (mitogenome) has been reported so far. This study determined the mitochondrial
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How shall we measure programmed cell death in eukaryotic microalgae? Eur. J. Phycol. (IF 2.4) Pub Date : 2022-04-04 Marcelo M. Barreto Filho, Inessa L. Bagatini, Pierre M. Durand
Abstract Programmed cell death (PCD) plays a key role in unicellular microalgal ecology. However, the methodologies for detecting PCD are problematic. Clearly, to interpret the empirical data, clarity on how to measure microalgal PCD is essential. Here, we critically review the current measurements of PCD and provide suggestions for future methodological developments and interpretations. We review
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Ultrastructure and phylogeny of Parietochloris toyamaensis sp. nov. and P. bilobata (Trebouxiophyceae) Eur. J. Phycol. (IF 2.4) Pub Date : 2022-03-28 Shin Watanabe, Naoto Mezaki, Takashi Nakada
Abstract We describe Parietochloris toyamaensis sp. nov. and verify the taxonomic status of P. bilobata (originally described as Neochloris and once combined with Ettlia), using ultrastructural and molecular analyses. P. toyamaensis was isolated from soil collected in Toyama, Japan. It had a parietal chloroplast with pyrenoids that were discontinuously covered with starch segments and penetrated more
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Molecular diversity of the genus Cryptomonas (Cryptophyceae) in Russia Eur. J. Phycol. (IF 2.4) Pub Date : 2022-03-14 Evgeniy Gusev, Nikita Martynenko, Pavel Kulizin, Maxim Kulikovskiy
ABSTRACT Molecular data were used to revise the diversity of the genus Cryptomonas in Russia, using samples collected across nine geographic regions within Russia from 2015–2019. Several molecular markers were used: nuclear SSU, LSU and ITS2 rDNA, and plastid psbA. In total, 24 species of the genus Cryptomonas were identified in the country’s fresh waters based on 122 different strains. Six new species
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Systematic revision of the red algal genus Yonagunia (Halymeniaceae, Rhodophyta) from Taiwan, including the description of two new species Eur. J. Phycol. (IF 2.4) Pub Date : 2022-03-09 Conxi Rodríguez-Prieto, Ya-Chu Chuang, Showe-Mei Lin
ABSTRACT Among the eight species of Yonagunia described in the Indo-Pacific region, five species have been reported from Taiwan. In this study, we re-examined additional herbarium specimens which were morphologically similar to the other Taiwanese species of Yonagunia. Two new species of Yonagunia (Y. robusta sp. nov. and Y. stipitata sp. nov.) were identified based on rbcL sequence analyses, and their
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Local adaptation of juvenile giant kelp, Macrocystis pyrifera, from their southern limit in the northern hemisphere explored using reciprocal transplantation Eur. J. Phycol. (IF 2.4) Pub Date : 2022-03-07 Lydia B. Ladah, José A. Zertuche-González
ABSTRACT The Pacific coast of the Baja California peninsula (Mexico) is a unique biogeographic transition zone, where many kelp species encounter their southern subtropical limits and have experienced a range contraction in the northern hemisphere. Using reciprocal transplant experiments with giant kelp populations from their southern limit and a northern temperate site on the Baja California peninsula
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Insight into the morphology and genetic diversity of the Chaetoceros tenuissimus (Bacillariophyta) species complex Eur. J. Phycol. (IF 2.4) Pub Date : 2022-03-04 Daniel Grzebyk, Vanina Pasqualini, Marie Garrido, Yann Quilichini, Clément Pereto, Philippe Cecchi
ABSTRACT Among the marine planktonic diatoms, Chaetoceros is among the most species-rich genera, and many Chaetoceros species are considered important primary producers. However, little is known about the ecology and distribution of the few small solitary species within this genus, including Chaetoceros tenuissimus. This article describes a minute Chaetoceros strain, identified as C. tenuissimus (named
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Morphology and phylogeny of two new Thalassiosiroid taxa (Bacillariophyceae), with two marginal rimoportulae Eur. J. Phycol. (IF 2.4) Pub Date : 2022-02-21 Biaobiao Niu, Yaqiong Guo, Nina Lundholm, Yang Li
ABSTRACT Thalassiosira and related taxa i.e. the taxa within Thalassiosirales are among the most abundant and widespread diatoms. The vast majority have one marginal rimoportula, but very few always have two. The knowledge on Thalassiosiroid taxa in Chinese waters is restricted, and to explore the diversity, monoclonal strains were established from southern Chinese coastal waters. Morphological data
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Ten new species of Ulva (Ulvophyceae, Chlorophyta) discovered in New Caledonia: genetic and morphological diversity, and bloom potential Eur. J. Phycol. (IF 2.4) Pub Date : 2022-02-21 Laura Lagourgue, Siloë Gobin, Maele Brisset, Simon Vandenberghe, Claire Bonneville, Thierry Jauffrais, Sylvette Van Wynsberge, Claude E. Payri
ABSTRACT Ulva is a green macroalgal genus with rich species diversity and worldwide distribution. While current knowledge on Ulva diversity focuses on temperate regions, genetic and morphological data in tropical and subtropical areas are scarce and the species richness is not clearly defined. The genus is known for its bloom-forming ability that can induce green tides leading to severe environmental
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Evolution of Thoracosphaeroideae (Peridiniales, Dinophyceae) and a case of atavism in taxonomically clarified Chimonodinium lomnickii var. wierzejskii from the Polish Tatra Mountains Eur. J. Phycol. (IF 2.4) Pub Date : 2022-02-21 Juliane Kretschmann, Anže Žerdoner Čalasan, Johanna Knechtel, Paweł M. Owsianny, Eva Facher, Marc Gottschling
ABSTRACT Character evolution in calcareous dinophytes and their relatives is poorly understood at present, particularly regarding the transformations of the epitheca. The precise taxonomic identity of Chimonodinium lomnickii var. (≡ Peridinium) wierzejskii is unclear, but two different arrangements of the epithecal plate pattern have been reported. We studied dinophyte material collected across Central
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Biogeography of six species in the planktonic diatom genus Bacteriastrum (Bacillariophyta) Eur. J. Phycol. (IF 2.4) Pub Date : 2022-02-08 Roberta Piredda, Diana Sarno, Daniele De Luca, Wiebe H.C.F. Kooistra
ABSTRACT Marine planktonic diatom species can exhibit contrasting distribution patterns, from endemic to cosmopolitan. Endemicity is counter-intuitive for planktonic species given their potentially large population sizes and ample migration opportunities by means of ocean currents. Here, we analyse the biogeography of six species of the diatom genus Bacteriastrum with apparently contrasting distribution
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Rare earth elements in brown algae of the genus Cystoseira (Phaeophyceae) (Black Sea) Eur. J. Phycol. (IF 2.4) Pub Date : 2022-02-07 Vitaliy I. Ryabushko, Elena V. Gureeva, Sergey V. Kapranov, Nikolay I. Bobko, Alexander V. Prazukin, Mikhail V. Nekhoroshev
Abstract Rare earth metals are widely used in various technologies, and their environmental impact needs to be assessed. Brown algae are recognized bioindicators of xenobiotic pollution in coastal marine areas, so we studied the rare earth element contents in short-lived branchlets of the two most abundant species of Cystoseira (C. barbata and C. crinita) on Black Sea coasts. The abundance of rare