Phycologia最新文献

{"title":"Taxonomy and phylogeny of <i>Chaetoceros</i> species of the section <i>Stenocincta</i> (Bacillariophyceae), with emendation of <i>C. affinis</i> and <i>C. willei</i> and description of three new species","authors":"Xudan Lu, Zuoyi Chen, David U. Hernández-Becerril, Nina Lundholm, Yang Li","doi":"10.1080/00318884.2023.2257128","DOIUrl":"https://doi.org/10.1080/00318884.2023.2257128","url":null,"abstract":"ABSTRACTSpecies of Chaetoceros sect. Stenocincta are frequently observed in marine phytoplankton. To study species diversity within the section Stenocincta, monoclonal strains were established from Chinese coastal waters and Norwegian Sea. Following detailed morphological observations and molecular evidence inferred from nucleus-encoded large subunit ribosomal DNA, the descriptions of C. affinis and C. willei are emended based on isolates from their respective type localities. Additionally, three new species are described. Chaetoceros donghaiensis sp. nov. is characterized by short straight chains, with thin setae only, and terminal setae that tend to cross distally. Chaetoceros forceps sp. nov. is unique by its thick terminal setae, each with an inflation near the end, with each pair forming a V-shape, resembling forceps. Chaetoceros lepidus sp. nov. is characterized by short, straight chains, narrowly elliptical valve faces, setae all located in the apical plane, and arched intercalary setae in opposite directions to the chain axis in broad girdle views. Three other distinct clades, which may also represent new species, were discerned in the LSU rDNA phylogeny, but more morphological characters are needed before formal proposals can be made. These species/clades formed a well-supported monophyletic lineage, supporting the current circumscription of section Stenocincta. This section is characterized by colonies in straight chains, cells with one chloroplast only, narrow lanceolate apertures, and terminal setae generally thicker than intercalary ones or both similar and thin. However, in C. diversus the terminal setae are thin and distinctly thicker pairs of intercalary setae are usual.KEYWORDS: MorphologyLSU rDNAChaetoceros affinisChaetoceros willeiChaetoceros donghaiensisChaetoceros forcepsChaetoceros lepidus DISCLOSURE STATEMENTNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by the National Nature Science Foundation of China [32170206]; Joint Fund of National Science Foundation of China and Chinese Shandong Province [U2106205]; National Key Research and Development Program of China [2022YFC3105201].","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134949347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revealing the diversity of the genus <i>Ulva</i> (Ulvales, Chlorophyta) in southeastern Brazil, with a description of <i>Ulva kanagawae sp. nov.</i>","authors":"Victor Andrei Rodrigues Carneiro, Nuno Tavares Martins, Sebastiana Lidielda Albuquerque da Silva, Maria Beatriz de Barros-Barreto, Sonia Barreto Pereira, Valéria Cassano","doi":"10.1080/00318884.2023.2243433","DOIUrl":"https://doi.org/10.1080/00318884.2023.2243433","url":null,"abstract":"ABSTRACTThe 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 undergone great advances using molecular data, leading to changes in the taxonomic status of species, and the recognition of species complexes and cryptic species. Here we reassessed Ulva species from southeastern Brazil using molecular data. We recognized 10 taxa, among which only three previously reported species were confirmed by molecular data: U. compressa, U. lactuca and U. ohnoi, the latter recently recorded from insular waters in Fernando de Noronha Archipelago, northeastern Brazil. Our phylogenetic analyses and species delimitation methods strongly supported the establishment of Ulva kanagawae sp. nov. The species traditionally cited for southeastern Brazil, U. flexuosa, U. linza, U. rigida and U. paradoxa, proved to be misapplied names of U. tepida, U. aragoënsis, U. ohnoi/U. lactuca and U. torta, respectively. One taxon, Ulva sp., remains unnamed and needs further studies. Ulva chaugulei and U. tanneri, both considered here as cryptogenic species, are new occurrences for Brazil expanding their geographic distribution to the Atlantic Ocean and western Atlantic Ocean, respectively. In addition, our analysis of sequences from type materials revealed that U. pseudo-ohnoi is a heterotypic synonym of U. conglobata. This first systematic molecular study of Ulva species in Brazil points out that more extensive sampling is needed to reveal the true diversity of the genus in Brazilian waters.KEYWORDS: PhylogenyrbcLtaxonomytufA ACKNOWLEDGEMENTSWe thank Joel Campos De-Paula, Renan Oliveira, Érico Atílio Teles, Mutue Toyota Fujii, Cristina Aparecida Nassar, Mateus Henrique Oliveira Pinto, Luanda Soares, Fábio Nauer, Maria Irisvalda L. G. Cavalcanti, Helena R. Fragoso, Bruno Sandy and Souto Neto for field assistance.DISCLOSURE STATEMENTThere are no conflicts of interest to be declared by the authors.Supplementary InformationSupplemental data for this article can be accessed online at https://doi.org/10.1080/00318884.2023.2243433Additional informationFundingThis work was supported by São Paulo Research Foundation (FAPESP, 2018/06085-1) to VC, and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Productivity Fellowship (proc. 304141/2020-8) to VC. This study was financed in part by the Rio de Janeiro Research Foundation (Biota FAPERJ, E-26/110.019/2011) to MBB-B and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001 (scholarships to VARC, NTM and SLAS).","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134949726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"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.","authors":"P. Gabrielson, Jeffery R. Hughey, V. Peña, J. Richards, G. Saunders, B. Twist, T. Farr, W. Nelson","doi":"10.1080/00318884.2023.2225309","DOIUrl":"https://doi.org/10.1080/00318884.2023.2225309","url":null,"abstract":"ABSTRACT 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 collected specimens. Six type specimens amplified for the rbcL gene and were Sanger sequenced yielding sequences ranging in length from 118 to 280 base pairs (bp). One, S. australasicum, failed to amplify and another, S. howei, was amplified for the psbA gene yielding a sequence 544 bp in length. The 118 bp long rbcL sequence of the lectotype of S. crassiramosum showed that it is a later, heterotypic synonym of S. molle. The rbcL sequences of type specimens of S. episoredion, S. schmidtii, S. sibogae and S. timorense ranged from 118 to 228 bp, and each is a distinct species. The 544 bp long psbA sequence of S. howei is also unique. The 280 bp long rbcL sequence of the lectotype of S. durum did not match any sequence with that name in any public repository, including the previously published complete plastome and mitogenome sequences. However, it was identical in sequence to a specimen in GenBank from the southern coast of Western Australia as well as several other sequences generated from field-collected specimens from the states of South Australia and Western Australia. The rhodolith specimens from New Zealand previously called S. durum are S. nodosum sp. nov. The species is endemic to New Zealand. The epilithic specimens from New Zealand previously called S. durum are S. immotum sp. nov., which is also found along the southeastern coast of Australia. Sporolithon crypticum sp. nov. is described from the southern coast of Western Australia. RAxML and Bayesian phylogenetic analyses of Sporolithon psbA and rbcL sequences are congruent between the two plastid encoded genes. DNA sequencing of type specimens of species of corallines is demonstrated to be the only reliable method to correctly apply names.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46745492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological, molecular and toxinological analyses of Alexandrium affine (Dinophyceae) from marine coastal waters of Buenos Aires Province (Argentina)","authors":"J. A. Tardivo Kubis, F. Rodríguez, A. Rossignoli, P. Riobó, Delfina Aguiar Juárez, E. Sar, Inés Sunesen","doi":"10.1080/00318884.2023.2223796","DOIUrl":"https://doi.org/10.1080/00318884.2023.2223796","url":null,"abstract":"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- and non-toxin-producing strains. Field and cultured materials from Buenos Aires Province were examined using light and scanning electron microscopy, morphologically and genetically (LSU rDNA partial sequencing) characterized, and compared with material from different regions worldwide. Toxin analyses using ultra-performance liquid chromatography with fluorescence detection and liquid chromatography-mass spectrometry methods failed to detect any paralytic or lipophilic shellfish toxins. This is the first record of A. affine from Argentina.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45832836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracing genetic variation of Gelidium canariense (Rhodophyta) based on new and historical collections","authors":"B. Alfonso, Olga Ortega-Martínez, José Carlos Hernández, M. Sansón, C. Sangil, Ricardo T. Pereyra","doi":"10.1080/00318884.2023.2242719","DOIUrl":"https://doi.org/10.1080/00318884.2023.2242719","url":null,"abstract":"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. We also studied the genetic diversity at the mesoscale (<100 km), i.e. between two localities on the north coast of Tenerife and at the macroscale (>100 km) using specimens collected on the island of La Palma. We found the presence of the same haplotype at the same location for the last 40 years. This haplotype also coincided within populations of Puerto de la Cruz and Garachico (Tenerife Island) and between populations of different islands (Tenerife and La Palma). This study provides a baseline (i.e. extraction method, PCR protocol for cox2-3 spacer molecular marker, level of DNA degradation of herbarium samples) of the genetic characterization of G. canariense that can be used in future molecular studies to better understand the distribution of genetic diversity in this vulnerable species.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44410336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morpho-molecular description of the new sand-dwelling dinoflagellate genus Aliferia gen. nov. (Dinophyceae) from the Sea of Japan, including two new species","authors":"M. Selina, K. Efimova, Tatiana V. Morozova, M. Hoppenrath","doi":"10.1080/00318884.2023.2233838","DOIUrl":"https://doi.org/10.1080/00318884.2023.2233838","url":null,"abstract":"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. The species differed in the thecal ornamentation, the number of epithecal plates, the shape of the left sulcal list and the shape of the fifth postcingular plate. Phylogenetic reconstructions based on LSU rDNA sequences of the two new species and their morphological characters confirmed their monophyly and justified the establishment of a new genus, Aliferia gen. nov., with Al. nikselinii sp. nov. and Al. kharlamenkoi sp. nov. The new genus was characterized by dorsoventrally or laterally flattened cells with small epitheca and large hypotheca, ascending cingulum, shifted or not shifted sulcus covered by a wide list on the left side, and with one or two ventral spines. Thecal tabulation: APC 3′ 2a 6–7′′ 2? or 3c 5s 5′′′ 1′′′′. Distance-based analyses indicated Diplopsalidoideae as the closest phylogroup to Aliferia. Seven phylogroups of the Amphidiniopsis complex, Herdmania, the Protoperidinium complex, and Archaeperidinium (Clade ‘Y’) were grouped with the highest support values, and Aliferia formed an independent branch basal to members of Clade ‘Y’. The genus Aliferia showed morphological similarity to both sand-dwelling (Amphidiniopsis and Herdmania) and planktonic (Diplopsalidoideae) species. The morphology and phylogeny of Aliferia suggested complex taxonomic relationships between the planktonic and benthic genera.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47201529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New insights into post-fertilization in Dudresnaya (Gigartinales, Rhodophyta) and Acrosymphyton (Acrosymphytales, Rhodophyta)","authors":"C. Rodríguez-Prieto, Jordi Morcillo","doi":"10.1080/00318884.2023.2220465","DOIUrl":"https://doi.org/10.1080/00318884.2023.2220465","url":null,"abstract":"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 the authors of this study to look more deeply into the development of the carpogonial and auxiliary fusion cells in the generitypes. Main results include a) description of the carpogonial fusion cell development by secondary connection (via fusion in D. verticillata and via conjunctor cells in A. purpuriferum); b) assessment of the existence, prior to diploidization, of primary auxiliary fusion cells in both species, and the description of their development and also that of the auxiliary fusion cells; and c) observation of occasional procarpic behaviour in both species, with gonimoblast developing from the secondary connecting filament initials in D. verticillata and from the carpogonial fusion complex in A. purpuriferum. The study has increased the understanding of the post-fertilization processes and supports the hypothesis that the procarpic behaviour is secondarily derived from non-procarpic ancestors.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48663557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intraspecific heterogeneity, multiple allelism and morphological divergence between morphotypes of Thalassiosira allenii (Bacillariophyta) from the Sea of Japan","authors":"K. Efimova, M. A. Shulgina, O. Shevchenko","doi":"10.1080/00318884.2023.2231783","DOIUrl":"https://doi.org/10.1080/00318884.2023.2231783","url":null,"abstract":"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 sequences and distinctly different nuclear rDNA sequences. The genetic differences between morphotypes were determined by the number of allelic variants of LSU rDNA, one of which was common to all studied strains. Two different types of the D1–D3 domain and three different types of the D8–D10 divergent domain were detected in the cultured strains of T. allenii. The three morphotypes are described in detail and compared. One allele of D1–D3 and one allele of D8–D10 were identified in the strains of T. allenii from two stations in Ussuri Bay. Two and three alleles of the D8–D10 domain were identified in the strains with an ambiguous morphotype and in T. allenii var. striata, respectively, from one station in Amur Bay. Subdivision of T. allenii into morphotypes based on morphology matched that based on molecular-genetic analyses using D8–D10 LSU rDNA. Caution is recommended in using LSU rDNA sequences and rbcL divergence as the principal criterion for delimiting and metabarcoding T. allenii varieties/morphotypes. The lack of genetic differentiation in rbcL, and the presence of clear intra-specific genetic differentiation among morphotypes in two regions of LSU rDNA suggest a link between morphological differences and the nuclear genome. The D8–D10 domain of LSU rDNA appears more suitable for discriminating morphotypes within T. allenii. The rbcL is an effective marker for recognizing T. allenii at species level, but not at infraspecific level.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41668365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photosynthesis-related responses of Chlorella sorokiniana (Trebouxiophyceae) to environmentally relevant concentrations of Cu nanoparticles","authors":"D. Barreto, A. Tonietto, Everton Willian Rodrigues da Silva Oliveira, Clarice Dias Britto Amaral, R. C. Pulgrossi, A. Polpo, J. Nóbrega, A. T. Lombardi","doi":"10.1080/00318884.2023.2214777","DOIUrl":"https://doi.org/10.1080/00318884.2023.2214777","url":null,"abstract":"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) concentrations on the photosynthetic performance of Chlorella sorokiniana, which included determining effective quantum yield (F’v/F’m), photochemical (Qp) and non-photochemical (NPQ) quenching, rapid light curves (RLC), light use efficiency (α), minimum saturation irradiance (Ek) and the maximum relative electron transport rate (ETRrmax), in addition to chlorophyll a content and cell viability. Dissolved Cu and free ionic Cu concentrations were determined, and dissolved Cu values were used as surrogate for nominal Cu-NPs concentrations. The experiments lasted 72 h and were carried out under controlled conditions. The results showed that cell viability and chlorophyll a decreased as Cu-NPs increased, but the opposite was obtained for the RLC parameters. Light saturation (Ek) and ETR increased as Cu-NPs concentrations increased in culture medium, but not the efficiency with which C. sorokiniana used the light. By showing that environmentally relevant Cu-NPs influenced C. sorokiniana metabolism, we add to the knowledge on the interactions between environmentally realistic Cu-NPs levels and phytoplankton cells.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41652482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of seawater temperature and irradiance on the growth of sporelings of Amphiroa cf. zonata and Corallina berteroi (Corallinales, Rhodophyta) in Japan","authors":"Takashi Hosoi, A. Kato","doi":"10.1080/00318884.2023.2217066","DOIUrl":"https://doi.org/10.1080/00318884.2023.2217066","url":null,"abstract":"ABSTRACT 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 zones. Using laboratory cultures, we determined the optimum and vital growth conditions for sporelings of two geniculate species, Amphiroa cf. zonata and Corallina berteroi, which are dominant in temperate waters around Japan. Samples were genetically identified as matching those two species as known from the coasts of Japan and worldwide, respectively. The optimum water temperature range and the upper critical water temperatures for sporeling growth were similar for the two coralline species. The optimum growth temperatures of A. cf. zonata (25–30°C) and C. berteroi (20–25°C) were comparable to those for temperate seaweeds commonly found in the same temperate region of Japan as the study sites. However, the upper critical temperatures for growth (33°C in A. cf. zonata and 32°C in C. berteroi) were higher than what is known for temperate kelps, though similar to those for other macroalgae. Amphiroa cf. zonata in the upper subtidal zone exhibited photoinhibition in conditions of less than 400 µmol photons m–2 s–1, whereas C. berteroi in the intertidal zone did not show such photoinhibition. The difference in irradiance effects upon growth was inferred to be related to the species distributions in their local environments of the coastal zone.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49154575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}