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Metabolomic and taxonomic characterization of Haloleptolyngbya lusitanica sp. nov. (Cyanobacteria, Synechococcales) Phycologia (IF 1.6) Pub Date : 2024-03-08 Rita Cordeiro, Rúben Luz, Sandra Lage, Carina Menezes, Elsa Dias, Cintia Flores, Amélia Fonseca, Vítor Gonçalves
The morphological plasticity of cyanobacteria and their widespread ecological dominance in a wide range of habitats highlights the need for in-depth taxonomic studies. This work focused on the taxo...
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Trend of Ostreopsis cf. ovata (Dinophyceae) along the Conero Riviera (northern Adriatic Sea) over two decades Phycologia (IF 1.6) Pub Date : 2024-03-08 Stefano Accoroni, Francesca Neri, Marika Ubaldi, Tiziana Romagnoli, Cecilia Totti
Harmful blooms of the toxic dinoflagellate Ostreopsis cf. ovata have been a recurrent phenomenon along the Mediterranean coasts in the last decades. Since first recorded, there has been a widesprea...
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Morphology and molecular phylogeny of two marine diatom species, Falcula cf. media and F. rectangularis sp. nov. (Bacillariophyta) from Japan Phycologia (IF 1.6) Pub Date : 2024-03-01 Kazuki Sugawara, Mitsunobu Kamiya, Risako Ota, Keigo Osada, David M. Williams, Hidekazu Suzuki
Two members of the marine diatom genus Falcula, which has been little known for a long time, were found from the surface of some Japanese seaweeds; one was assigned to F. cf. media and the other wa...
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Diatoms as dandelions: convergent evolution in the reproductive biology of small Nitzschia species (Bacillariophyta) and its possible taxonomic consequences Phycologia (IF 1.6) Pub Date : 2024-03-01 David G. Mann, Rosa Trobajo
Nitzschia soratensis and N. inconspicua are two small diatoms that are extremely similar in the light microscope though separable in subtle aspects of valve and girdle ultrastructure. They are not ...
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Inacoccus terrestris sp. nov. (Chroococcaceae), a new cyanobacterium from soil of the European Russian Subarctic Phycologia (IF 1.6) Pub Date : 2024-02-23 Denis Davydov, Anna Vilnet
A strain of an Inacoccus species (Cyanobacteria, Chroococcaceae) was isolated from a terrestrial habitat in the Murmansk Region, Russia, and characterized using a ‘polyphasic approach’ that include...
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Morphological and molecular analyses of Vaucheria section Piloboloideae (Xanthophyceae: Vaucheriaceae) indicate alternative species identities for broadly distributed taxa Phycologia (IF 1.6) Pub Date : 2024-02-21 John M. Huisman, Heroen Verbruggen, Riyad Hossen, Nataliya Rybalka, Timothy J. Entwisle
The discovery of a previously unrecorded Vaucheria species in subtidal marine habitats in Western Australia has led to a review of species included in Vaucheria section Piloboloideae, a taxon that ...
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Chloromonas fuhrii sp. nov. (Chlorophyceae), a cosmopolitan alga from colored snow Phycologia (IF 1.6) Pub Date : 2024-02-20 Phil M. Novis, Robin B. Kodner, Anastasija Podolyan, Thomas Leya
The modern concept of the genus Chloromonas includes a subclade of species found exclusively in snow. We describe Chloromonas (Cr.) fuhrii sp. nov., a new member of this clade, which is closely rel...
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Society news: editor-in-chief appointed Phycologia (IF 1.6) Pub Date : 2024-02-06
Published in Phycologia (Vol. 63, No. 1, 2024)
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Tyge Christensen Prize 2022 Phycologia (IF 1.6) Pub Date : 2024-02-06
Published in Phycologia (Vol. 63, No. 1, 2024)
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Ecophysiological behaviour of different diatoms in response to copepod signals Phycologia (IF 1.6) Pub Date : 2024-02-06 Alessandra Petrucciani, Stefano Maso, Alessandra Norici
Phytoplanktonic communities have been moulded from a higher level in the food web by zooplankton predation. Diatoms, which are the major primary producers in present day oceans, have evolved many s...
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Morpho-anatomical and molecular characterization indicates overlooked taxonomic diversity in the Antarctic genus Hymenocladiopsis (Rhodymeniales, Rhodophyta) Phycologia (IF 1.6) Pub Date : 2024-02-06 Catalina Y. Rodríguez Seguel, Daniel Vitales, Jordi Rull Lluch
Wide morphological variation has been described in the Antarctic macroalga Hymenocladiopsis prolifera, suggesting that there could be overlooked taxonomic diversity in the genus Hymenocladiopsis, w...
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Photosynthesis in a green alga (zoochlorella), Chlorella cf. vulgaris in the soft coral Sarcophyton sp. Phycologia (IF 1.6) Pub Date : 2024-02-06 Raymond J. Ritchie, Suhailar Sma-Air, Michael S. Johnson, Shauna A. Murray, Anne Nguyen, Anthony W.D. Larkum, Vipawee Dummee
An undescribed variety of the green alga Chlorella cf. vulgaris was found living in the octocoral (soft coral) Sarcophyton sp., which also has dinoflagellate zooxanthellae. The green alga is presen...
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A new dinoflagellate Gonyaulax pospelovana with resting cysts resembling Spiniferites delicatus and its biogeography and ecology revealed by DNA metabarcoding Phycologia (IF 1.6) Pub Date : 2024-02-06 Haifeng Gu, Jing Zheng, Shuning Huang, Lourdes Morquecho, Bernd Krock, Hyeon Ho Shin, Zhun Li, Amélie Derrien, Kenneth Neil Mertens
Extant species of the dinoflagellate genus Gonyaulax are capable of producing resting cysts morphologically similar to different cyst-based genera, and their cyst-theca relationships are far from r...
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Experiments with indigenous green algae under varying N and P regimes for revealing their potential in phycoremediation and biomass yield Phycologia (IF 1.6) Pub Date : 2024-02-06 Theja Joseph, Karthika Suresh, Joseph George Ray
Three series of experimental treatments were carried out to assess five indigenous green algae for biomass quality, productivity, and phycoremediation potential under varying N, P, NP, and N:P in B...
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The reproductive system of the cryptogenic alga Chondria tumulosa (Florideophyceae) at Manawai, Papahānaumokuākea Marine National Monument Phycologia (IF 1.6) Pub Date : 2024-02-06 Taylor M. Williams, Stacy A. Krueger-Hadfield, Kristina M. Hill-Spanik, Randall K. Kosaki, Solenn Stoeckel, Heather L. Spalding
Determining the relative importance of sexual and asexual reproduction is critical for determining how genetic diversity is partitioned within and among populations. Macroalgae exhibit reproductive...
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Disturbance of respiration-improved lipid biosynthesis in Auxenochlorella pyrenoidosa (Chlorellaceae, Chlorophyta) under nitrogen limitation Phycologia (IF 1.6) Pub Date : 2024-02-06 Liufu Wang, Tian Yang, Liqiu Shi, Yaqi Jin, Wenzhi Wei
Understanding the related mechanisms between aerobic respiration and lipid biosynthesis may promote microalgal-biofuel industries through metabolic engineering. However, little is known about how a...
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Phylogenetic analysis of the Cladophora coelothrix complex, including the description of the new genus Leliaertia (Cladophorales, Ulvophyceae) Phycologia (IF 1.6) Pub Date : 2024-02-06 Jhullyrson Osman Ferreira de Brito, Aigara Miranda Alves, Luane do Carmo Portela, Cassio van den Berg, Sonia Maria Barreto Pereira, Lísia Monica Gestinari, Valéria Cassano, Carlos Wallace do Nascimento Moura, Watson Arantes Gama
Molecular phylogenetic studies have revealed the polyphyletic nature of Cladophora as traditionally circumscribed, which is separated into four main clades: Cladophoraceae, Siphonocladus, Pithophor...
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Effects of temperature on isomorphic haploid-diploid phases of Gracilariopsis tenuifrons (Gracilariales, Rhodophyta) Phycologia (IF 1.6) Pub Date : 2024-02-06 Andre Vinicius Fonseca Faria, Estela M. Plastino
Sea surface temperature is increasing, and we still do not have a good understanding of the effects of these temperature rises on haploid-diploid phases of many isomorphic red algae. In this study,...
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Two new species of Callophyllis (Rhodophyta, Kallymeniaceae) from the Russian Pacific coast Phycologia (IF 1.6) Pub Date : 2024-01-23 Anna V. Skriptsova, Galina G. Zhigadlova
Seven species of Callophyllis have been known off the Pacific coast of Russia; hovewer, molecular data have been obtained only for three species. In this study we re-examined the genus along the Ru...
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Shahulinema minutum gen. & sp. nov. (Oculatellaceae) and Euryhalinema shahuense sp. nov. (Nodosilineaceae), two new Cyanobacteria isolated from Shahu Lake in China Phycologia (IF 1.6) Pub Date : 2024-01-16 Shuheng Li, Jiaxin Chen, Hang Zhang, Ruozhen Geng, Gongliang Yu, Fangfang Cai
Two novel cyanobacteria (strains SH01 and SH02) with thin filaments and simple morphology were isolated from Shahu Lake in China. The two strains were morphologically similar to the thin, simple fi...
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Almyronema epifaneia gen. & sp. nov. (Cyanobacteria, Nodosilineaceae) isolated from an Indian mangrove forest Phycologia (IF 1.6) Pub Date : 2024-01-03 Arup Ratan Roy, Sandeep Chakraborty, Apala Karmakar, Sergio de los Santos-Villalobos, Joydeep Mukherjee
Three simple filamentous cyanobacteria (strains S1, S6 and S10) were isolated from the upper surface of intertidal soil of an Indian mangrove forest, the Sundarbans. The three cyanobacterial strain...
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Resolving the identity of Jania crassa (Corallinales, Rhodophyta) Phycologia (IF 1.6) Pub Date : 2023-12-07 Wendy A. Nelson, Line Le Gall, Viviana Peña, Brenton A. Twist
DNA sequences obtained from the isolectotype of Jania crassa, collected from Dusky Sound, Fiordland, New Zealand, have revealed the identity of this poorly understood taxon, and enabled comparison ...
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Tolerance of three temperate macroalgal taxa to marine heatwaves of differing durations and intensities is not modulated by irradiance Phycologia (IF 1.6) Pub Date : 2023-12-07 Erik C. Krieger, Yaelle Sarid-Segal, Imke M. Böök, Aleluia Taise, Denisa Berbece, Christopher E. Cornwall
Marine heatwaves (MHWs) are recognized as principal drivers of ocean change. However, interactions with other important local and global drivers such as ocean acidification, eutrophication and sedi...
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Interactive effects of ocean acidification and water flow on growth and recruitment of early successional coralline algal communities Phycologia (IF 1.6) Pub Date : 2023-12-07 Anna Kluibenschedl, Christopher E. Cornwall, Wendy A. Nelson, Miles Lamare, Daniel W. Pritchard, Christopher D. Hepburn
Coralline algae play crucial roles in near-shore ecosystems but are susceptible to ocean acidification (OA). It has been hypothesized that low water velocity, allowing localized photosynthesis-driv...
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Calcification in the coralline red algae: a synthesis Phycologia (IF 1.6) Pub Date : 2023-12-07 Sophie J. McCoy, Curt M. Pueschel, Christopher E. Cornwall, Steeve Comeau, Sven A. Kranz, Nathan B. Spindel, Michael A. Borowitzka
A descriptive model of calcification in the coralline red algae is integral to understanding their contributions to marine geochemistry, the responses of seascapes to global change, and their own e...
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Species diversity and ecological roles of marine calcified macroalgae, with an emphasis on coralline algae in the western Pacific Ocean Phycologia (IF 1.6) Pub Date : 2023-12-07 Showe-Mei Lin, Wendy Nelson, John M. Huisman
This special issue was initially conceived during a council meeting of the International Phycological Society in 2021, where the promotion of manuscript submissions focusing on regional research ac...
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Contrasting patterns of genetic diversity and population discontinuity in the common red seaweed Gracilaria salicornia (Gracilariaceae) along the coasts of Thailand Phycologia (IF 1.6) Pub Date : 2023-11-03 Narongrit Muangmai, Sinchai Maneekat, Anong Chirapart, Giuseppe C. Zuccarello
For long-term management and conservation of marine resources an understanding of their genetic diversity and geographic distribution is necessary. The red alga Gracilaria salicornia is widely dist...
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Molecular assessment of specimens previously assigned to Cirrulicarpus (Kallymeniaceae, Rhodophyta) in Brazil, with the description of Meredithia dichotoma sp. nov. Phycologia (IF 1.6) Pub Date : 2023-11-03 Luanda Pereira Soares, Silvia M.P.B. Guimarães, Mutue Toyota Fujii
Molecular sequence analyses of specimens previously identified as Cirrulicarpus sp. in the southeastern Brazil (Espírito Santo coast), indicated that they are more closely related to the genus Mere...
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New terrestrial cyanobacteria from the Azores Islands: description of Venetifunis gen. nov. and new species of Albertania, Kovacikia and Pegethrix Phycologia (IF 1.6) Pub Date : 2023-11-03 Rúben Luz, Rita Cordeiro, Jan Kaštovský, Jeffrey R. Johansen, Elisabete Dias, Amélia Fonseca, Ralph Urbatzka, Vitor Vasconcelos, Vítor Gonçalves
The taxonomy of cyanobacteria has advanced quickly with the use of molecular methods in combination with well-defined morphological and ecological characters. Using this approach, many taxonomical ...
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Biecheleria donggangensis sp. nov. (Suessiaceae, Dinophyceae), a new marine woloszynskioid species germinated from coastal sediment of the Yellow Sea, China Phycologia (IF 1.6) Pub Date : 2023-11-03 Yuyang Liu, Zhangxi Hu, Haifeng Gu, Zhe Tao, Yunyan Deng, Lixia Shang, Zhaoyang Chai, Ying Zhong Tang
A new marine woloszynskioid dinoflagellate, Biecheleria donggangensis sp. nov., germinated from the sediments of Rizhao coastal area, China, was examined by light and scanning electron microscopy. ...
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Taxonomy and phylogeny of Chaetoceros species of the section Stenocincta (Bacillariophyceae), with emendation of C. affinis and C. willei and description of three new species Phycologia (IF 1.6) Pub Date : 2023-11-03 Xudan Lu, Zuoyi Chen, David U. Hernández-Becerril, Nina Lundholm, Yang Li
Species of Chaetoceros sect. Stenocincta are frequently observed in marine phytoplankton. To study species diversity within the section Stenocincta, monoclonal strains were established from Chinese...
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Marine benthic dinoflagellates – their relevance for science and society (2nd, completely revised edition) Phycologia (IF 1.6) Pub Date : 2023-11-03 Albert Reñé
Published in Phycologia (Vol. 62, No. 5, 2023)
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Light irradiance modifies the fatty acid composition of Amphidinium carterae (Dinophyceae) Phycologia (IF 1.6) Pub Date : 2023-11-03 Armando Mendoza-Flores, M. del Pilar Sánchez-Saavedra
Amphidinium carterae is a dinoflagellate of increasing interest for producing bioactive compounds. The aim of this study was to investigate the effect of five irradiances (50, 100, 150, 200 and 250...
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A new freshwater gomphonemoid diatom genus from India, with the description of a new species from the Eastern Ghats Phycologia (IF 1.6) Pub Date : 2023-11-03 Balasubramanian Karthick, Murugesan Yogeshwaran, J. Patrick Kociolek
We present light and SEM observations of a new astigmate gomphonemoid diatom from the Eastern Ghats of India. This species, and a closely allied one from the Western Ghats that has a stigma, are si...
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Systematic revision of the Grateloupia complex (Rhodophyta) from Vietnam using rbcL and LSU sequences, with the description of Phyllymenia nhatrangensis sp. nov. Phycologia (IF 1.6) Pub Date : 2023-11-03 Xuan-Vy Nguyen, Lawrence M. Liao, Showe-Mei Lin
Grateloupia sensu lato has had a long and troublesome taxonomic history because of superficial similarities in morphology, ill-defined species boundaries and lack of diagnostic characters that leav...
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Endoplura gyeokpoensis sp. nov. and E. limpeticola sp. nov. (Ralfsiales, Phaeophyceae), two new crustose brown algae from Korea Phycologia (IF 1.6) Pub Date : 2023-11-03 Antony Otinga Oteng’o, Boo Yeon Won, Tae Oh Cho
Endoplura gyeokpoensis sp. nov. and E. limpeticola sp. nov. from Korea are described based on molecular and morphological analyses. The crustose brown algal genus Endoplura previously comprised thr...
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Revealing the diversity of the genus Ulva (Ulvales, Chlorophyta) in southeastern Brazil, with a description of Ulva kanagawae sp. nov. Phycologia (IF 1.6) Pub Date : 2023-11-03 Victor Andrei Rodrigues Carneiro, Nuno Tavares Martins, Sebastiana Lidielda Albuquerque da Silva, Maria Beatriz de Barros-Barreto, Sonia Barreto Pereira, Valéria Cassano
The green algal genus Ulva is one of the most widely distributed macroalgal genera. The taxonomy of Ulva is problematic due to its simple morphology. The study of the diversity of this genus has un...
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Species diversity and molecular phylogeny of Crustaphytum and Mesophyllum (Hapalidiales, Rhodophyta) from the Asian Pacific, including three new species of Crustaphytum Phycologia (IF 1.6) Pub Date : 2023-09-08 Li-Chia Liu, Showe-Mei Lin, Phaik-Eem Lim
The non-geniculate coralline algal genus Crustaphytum occurs in subtropical regions of the Pacific and Atlantic Oceans and presently contains only two species, C. pacificum and C. atlanticum. In co...
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Studies on the complex Warnowiaceae (Dinophyceae) I. Lohmann’s Pouchetia parva refound and renamed Nematodinium parvum comb. nov. (= Warnowia parva) Phycologia (IF 1.6) Pub Date : 2023-09-08 María García-Portela, Øjvind Moestrup, Niels Daugbjerg, Andreas Altenburger, Nina Lundholm
The dinoflagellate family Warnowiaceae has often been considered to include some of the most complex cells among the protists. The number of described species is around 40, but both the species and...
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Morpho-molecular description of the new sand-dwelling dinoflagellate genus Aliferia gen. nov. (Dinophyceae) from the Sea of Japan, including two new species Phycologia (IF 1.6) Pub Date : 2023-09-06 Marina S. Selina, Kseniya V. Efimova, Tatiana V. Morozova, Mona Hoppenrath
ABSTRACT Two new marine sand-dwelling dinoflagellate species from subtidal sand collected in Peter the Great Bay, Sea of Japan, were described by morphological and molecular methods. Both species were slightly flattened dorsoventrally or laterally, roughly oval in shape, with small epitheca and large hypotheca, with ascending cingulum, and sulcus covered by a wide list of the first postcingular plate
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Tracing genetic variation of Gelidium canariense (Rhodophyta) based on new and historical collections Phycologia (IF 1.6) Pub Date : 2023-09-06 Beatriz Alfonso, Olga Ortega-Martínez, José Carlos Hernández, Marta Sansón, Carlos Sangil, Ricardo T. Pereyra
ABSTRACT Genetic sequencing of herbarium specimens provides invaluable information on species genetic history. However, several factors hinder the extraction of high-quality DNA from long-term preserved specimens. Our goal was to study the genetic variability of the endemic and habitat-forming macroalga Gelidium canariense over the last 40 years using the mitochondrial intergenic marker cox2-3 spacer
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Intraspecific heterogeneity, multiple allelism and morphological divergence between morphotypes of Thalassiosira allenii (Bacillariophyta) from the Sea of Japan Phycologia (IF 1.6) Pub Date : 2023-07-21 Kseniya V. Efimova, Mariia A. Shulgina, Olga G. Shevchenko
ABSTRACT Thalassiosira allenii is reported for the first time from marine phytoplankton of the Russian far East. Five strains representing three morphological variants of T. allenii, from three locations in the Sea of Japan, were investigated. The D8–D10 domain of LSU rDNA and rbcL of T. allenii were sequenced for the first time. Three morphological forms of T. allenii showed completely identical rbcL
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Morphological, molecular and toxinological analyses of Alexandrium affine (Dinophyceae) from marine coastal waters of Buenos Aires Province (Argentina) Phycologia (IF 1.6) Pub Date : 2023-07-20 Jonás Adrián Tardivo Kubis, Francisco Rodríguez, Araceli E. Rossignoli, Pilar Riobó, Delfina Aguiar Juárez, Eugenia Alicia Sar, Inés Sunesen
ABSTRACT In the framework of a monitoring program of harmful microalgae from the marine coastal waters of Buenos Aires Province to mitigate the impacts of harmful algal blooms on the aquaculture and marine life and to protect human health, a strain of Alexandrium affine (LPCc012) was isolated. Alexandrium affine is a worldwide distributed species reported as harmful algal bloom-forming, with toxin-
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Asia Pacific Sporolithon (Corallinophycidae, Rhodophyta) species revised based on DNA sequencing of type specimens and including S. crypticum sp. nov., S. immotum sp. nov. and S. nodosum sp. nov. Phycologia (IF 1.6) Pub Date : 2023-07-17 Paul W. Gabrielson, Jeffery R. Hughey, Viviana Peña, Joseph L. Richards, Gary W. Saunders, Brenton Twist, Tracy Farr, Wendy A. Nelson
To address the taxonomic uncertainty of Sporolithon species named in the early to mid-20th century, targeted PCR sequencing was performed on eight historical type specimens and on recently collecte...
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New insights into post-fertilization in Dudresnaya (Gigartinales, Rhodophyta) and Acrosymphyton (Acrosymphytales, Rhodophyta) Phycologia (IF 1.6) Pub Date : 2023-07-14 Conxi Rodríguez-Prieto, Jordi Morcillo
ABSTRACT Dudresnaya (Dumontiaceae, Gigartinales) and Acrosymphyton (Acrosymphytaceae, Acrosymphytales) are florideophycean genera (Rhodophyta) traditionally described as presenting a typical non-procarpic behaviour. The post-fertilization stages of their corresponding generitypes, D. verticillata and A. purpuriferum, have been described on many occasions. Nevertheless, some recent observations led
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Effects of seawater temperature and irradiance on the growth of sporelings of Amphiroa cf. zonata and Corallina berteroi (Corallinales, Rhodophyta) in Japan Phycologia (IF 1.6) Pub Date : 2023-06-16 Takashi Hosoi, Aki Kato
Geniculate coralline algae in temperate waters form dense, carpet-like turfs and are prevalent in intertidal rocky habitats or as understory beneath canopy-forming seaweeds in shallow subtidal zone...
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Photosynthesis-related responses of Chlorella sorokiniana (Trebouxiophyceae) to environmentally relevant concentrations of Cu nanoparticles Phycologia (IF 1.6) Pub Date : 2023-06-16 Daniela Mariano Barreto, Alessandra Emanuele Tonietto, Everton Willian Rodrigues da Silva Oliveira, Clarice Dias Britto Amaral, Rafael Catoia Pulgrossi, Adriano Polpo, Joaquim Araújo Nóbrega, Ana Teresa Lombardi
ABSTRACT Nanoparticles (NPs) are highly reactive particles that find a broad array of applications in society; as a result, they may accumulate in aquatic environments. Microalgae are the base of foodwebs and serve as surfaces for NPs, interacting and transporting them to higher trophic levels. We aimed at understanding the effects of environmentally significant and higher copper nanoparticles (Cu-NPs)
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Seaweeds of Denmark Phycologia (IF 1.6) Pub Date : 2023-06-01 Kjersti Sjøtun
Published in Phycologia (Vol. 62, No. 4, 2023)
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ROBERT L. VADAS (5 August 1936–11 February 2023) Phycologia (IF 1.6) Pub Date : 2023-05-31 Steve Dudgeon, Janet Kübler, Brian Beal, Robert Steneck
Published in Phycologia (Vol. 62, No. 4, 2023)
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Reproductive phenology of a dominant crustose coralline alga, Sporolithon sp., from Taoyuan algal reefs in Northwest Taiwan Phycologia (IF 1.6) Pub Date : 2023-05-31 Yen-Zhen Tan, Li-Chia Liu, Li-Chun Tseng, Showe-Mei Lin
Sporolithon is a common genus of crustose coralline algae occurring at Taoyuan algal reefs in Northwest Taiwan. However, little is known of the reproductive cycles and growth pattern of the genus i...
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Systematic revision of the non-geniculate coralline genus Phymatolithon (Hapalidiales, Rhodophyta) from Taiwan, including three new species Phycologia (IF 1.6) Pub Date : 2023-05-29 Li-Chia Liu, Showe-Mei Lin
Phymatolithon is a dominant genus in the algal reefs in Northwest Taiwan. In this study, we describe three new species of Phymatolithon, P. fragile sp. nov., P. taiwanense sp. nov. and P. variabile...
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A new small thecate dinoflagellate Azadinium anteroporum sp. nov. (Amphidomataceae, Dinophyceae) isolated from the Asian Pacific Phycologia (IF 1.6) Pub Date : 2023-05-29 Koyo Kuwata, Wai Mun Lum, Kazuya Takahashi, Garry Benico, Hajime Uchida, Mayu Ozawa, Ryoji Matsushima, Ryuichi Watanabe, Hiroshi Oikawa, Toshiyuki Suzuki, Mitsunori Iwataki
ABSTRACT The marine thecate dinoflagellate Azadinium includes species known to produce the diarrhetic shellfish toxins known as azaspiracids (AZAs). In this study, the morphology of a thecate dinoflagellate isolated from Mutsu Bay, Japan, was examined by LM and SEM, and its phylogenetic position was inferred from ITS and LSU rDNA sequences. The production of AZAs was examined by liquid chromatography-triple
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Hindakia tetrachotoma ME03 (Chlorophyta) has high phenolic content, antioxidant capacity, and attenuates H2O2-induced oxidative stress and apoptosis in human cells Phycologia (IF 1.6) Pub Date : 2023-05-24 Onur Bulut, Çağla Sönmez, Hüseyin Avni Öktem
ABSTRACT Oxidative stress damages cellular components and may lead to cell death when it is not effectively counterbalanced by the endogenous antioxidant mechanisms. Exogenous sources of antioxidants are also necessary to cope with high levels of free radicals. Microalgae are rich sources of diverse metabolites with high antioxidant potential. In this study, metabolites of Hindakia tetrachotoma ME03
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Nitrate and phosphate uptake of morphologically distinct calcified macroalgae Phycologia (IF 1.6) Pub Date : 2023-05-02 Bienson Ceasar V. Narvarte, Lourie Ann R. Hinaloc, Shienna Mae C. Gonzaga, Bea A. Crisostomo, Tom Gerald T. Genovia, Michael Y. Roleda
Calcified macroalgae are essential components of marine ecosystem, yet much of their physiology remains to be understood. Here, the nutrient (NO3– and PO4–3) uptake physiologies of two branched mac...
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Cryptomonas pyrenoidifera organellar genomes and estimation of its ITS2 sequence diversity using lineage directed barcode primers Phycologia (IF 1.6) Pub Date : 2023-05-01 Lucie O. Hornberger, Isabella J. Maggard, Robin A. Matthews, A. Bruce Cahoon
ABSTRACT Cryptomonas is a common metropolitan freshwater microalgal genus that is easily recognizable due to its distinctive asymmetric cellular morphology and swimming pattern. There are currently 71 recognized Cryptomonas species but these can be difficult to identify by cellular morphology alone. This makes estimation of Cryptomonas diversity from environmental samples challenging as it requires
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Enhanced sampling refines the biogeography of the freshwater green alga Aegagropila linnaei (Cladophoraceae) Phycologia (IF 1.6) Pub Date : 2023-04-27 Polina A. Volkova, Elena V. Chemeris
ABSTRACT A phylogeographic approach is the only way to study the dispersal history of most algae, which are rarely preserved as fossils. However, the only freshwater alga for which this approach has been applied on a Eurasian scale is the endangered green alga Aegagropila linnaei, which is thought to be a poor disperser. Previous phylogeographic results were explained by stepwise dispersal across the
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A new small-celled naviculoid diatom species, Mayamaea pannonica sp. nov. (Bacillariophyceae) from soda pans in Serbia Phycologia (IF 1.6) Pub Date : 2023-04-21 Danijela Vidaković, Zlatko Levkov, Jelena Krizmanić, Bank Beszteri, Bojan Gavrilović, Miloš Ćirić
ABSTRACT Combining morphological and molecular approaches, a new diatom species is described in the genus Mayamaea from a Special Nature Reserve, Okanj bara in Serbia, an alkaline and subsaline soda pan with pronounced seasonal drying. Mayamaea pannonica sp. nov. possesses typical characteristics of the genus Mayamaea, such as uniseriate striae and hymenes that cover the areolae from the outside. It
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Growth, antioxidant response and microcystin production by Microcystis aeruginosa exposed to the surfactant perfluorooctanesulfonic acid (PFOS) Phycologia (IF 1.6) Pub Date : 2023-04-17 Farida Salihu Muhammad, Mathias Ahii Chia, David S. Abolude, Sulaiman Tanimu, Regina Anya Otogo
ABSTRACT The surfactant perfluorooctanesulfonic acid (PFOS) is used in various products, but its impact on aquatic organisms like cyanobacteria is poorly understood. PFOS was tested for acute toxicity on the cyanobacterium Microcystis aeruginosa in terms of growth, photosynthetic pigment content, antioxidant response and microcystin production. When exposed to PFOS, the cyanobacterium was sensitive
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Morphology and molecular phylogeny of a widely distributed but little-known sand-dwelling phototrophic dinoflagellate, Coutea sabulosa gen. & sp. nov. (Dinophyceae, Alveolata) Phycologia (IF 1.6) Pub Date : 2023-04-11 Nicolas Chomérat, Maria Saburova, Gwenaël Bilien, Frédéric Zentz, Mona Hoppenrath
ABSTRACT A new thecate, photosynthetic, sand-dwelling marine dinoflagellate, Coutea sabulosa gen. & sp. nov., observed in various locations from temperate to subtropical areas, is described based on detailed morphological and molecular data of material from Germany and Kuwait. Cells of C. sabulosa are oval, small (14.5–28.3 µm long and 11.1–18.0 µm wide), dorsoventrally compressed, and show a conspicuous
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Pseudobangia corderoi sp. nov. (Bangiales, Rhodophyta) from the Philippines Phycologia (IF 1.6) Pub Date : 2023-04-11 Richard V. Dumilag, Glenn Cedrick V. Gamus, Sandra L. Yap
ABSTRACT A new filamentous bangialean alga, Pseudobangia corderoi sp. nov., is described from the northern Philippines. Locally known as a sea vegetable, this species was previously identified as ‘Bangia fuscopurpurea’. Inferred combined analyses of the nucleus-encoded SSU rDNA and the plastid-encoded RubisCO LSU (rbcL) gene indicate that P. corderoi is sister to another unidentified species of Pseudobangia