Phycologia最新文献_第10页

Multi-gene phylogeny reveals a new genus and species of Hapalidiales (Rhodophyta) from Antarctica: Thalassolithon adeliense gen. & sp. nov. 多基因系统发育揭示了南极单足目（红藻门）的一个新属和新种：Thalassoliton adeliense gen.&sp.nov。

IF 1.6 4区生物学

Phycologia Pub Date : 2023-01-02 DOI: 10.1080/00318884.2022.2147745

Riccardo Trentin, E. Moschin, A. Grapputo, F. Rindi, S. Schiaparelli, I. Moro

{"title":"Multi-gene phylogeny reveals a new genus and species of Hapalidiales (Rhodophyta) from Antarctica: Thalassolithon adeliense gen. & sp. nov.","authors":"Riccardo Trentin, E. Moschin, A. Grapputo, F. Rindi, S. Schiaparelli, I. Moro","doi":"10.1080/00318884.2022.2147745","DOIUrl":"https://doi.org/10.1080/00318884.2022.2147745","url":null,"abstract":"ABSTRACT Non-geniculate coralline algal specimens were collected in 2013 during the XXVIII Italian Expedition to Antarctica in Adélie Cove (Terra Nova Bay; Ross Sea) and deposited in the collections of the Italian National Antarctic Museum (MNAIT, Section of Genoa). Specimens were characterized through a polyphasic approach combining DNA sequence data obtained for four genes (psbA, rbcL, 18S rDNA and cox1) with morpho-anatomical observations. DNA sequences revealed that all specimens belonged to the same species. Phylogenetic reconstructions unambiguously recovered this alga as a member of the order Hapalidiales, but without any close relationship to a genus of this order currently recognized on a molecular phylogenetic basis. Instead, it formed a well-supported lineage with specimens named ‘Hapalidiales sp. ZH-Twist-2019’, collected in New Zealand, for which no formal assignment at genus level has been proposed. Species delimitation methods (ABGD, PTP, GMYC) applied to the psbA dataset indicated that the Adélie Cove coralline alga is a distinct species from all other known hapalidialean species for which such sequences are available. A new genus, Thalassolithon gen. nov., is proposed for T. adeliense sp. nov.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":"62 1","pages":"83 - 98"},"PeriodicalIF":1.6,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49408903","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}

引用次数: 0

Gonyaulax geomunensis sp. nov. and two allied species (Gonyaulacales, Dinophyceae) from Korean coastal waters and East China Sea: morphology, phylogeny and growth response to changes in temperature and salinity 朝鲜近海和东海的Gonyaulax geomunensis sp.nov.和两个亲缘物种（Gonyaulacales，Dinophyceae）：形态、系统发育和生长对温度和盐度变化的响应

IF 1.6 4区生物学

Phycologia Pub Date : 2022-12-15 DOI: 10.1080/00318884.2022.2140548

Hyun Jung Kim, Zhun Li, H. Gu, K. Mertens, Joo Yeon Youn, Kyeong Yoon Kwak, S. Oh, K. Shin, Y. Yoo, Wonchoel Lee, H. Shin

{"title":"Gonyaulax geomunensis sp. nov. and two allied species (Gonyaulacales, Dinophyceae) from Korean coastal waters and East China Sea: morphology, phylogeny and growth response to changes in temperature and salinity","authors":"Hyun Jung Kim, Zhun Li, H. Gu, K. Mertens, Joo Yeon Youn, Kyeong Yoon Kwak, S. Oh, K. Shin, Y. Yoo, Wonchoel Lee, H. Shin","doi":"10.1080/00318884.2022.2140548","DOIUrl":"https://doi.org/10.1080/00318884.2022.2140548","url":null,"abstract":"ABSTRACT Six strains of three different Gonyaulax species were established by isolating cells from the Korean coastal area and the East China Sea, and their morphologies and molecular phylogenies based on SSU and LSU rRNA gene sequences were examined. In addition, the growth responses of the Gonyaulax species to changes in temperature and salinity were investigated. Based on morphological features and phylogenetic positions, Gonyaulax whaseongensis and G. polygramma were identified, and G. geomunensis sp. nov. is proposed in this study. These species displayed the plate formula typical for Gonyaulax, but G. polygramma and G. geomunensis sometimes showed a small intercalary plate (1a) surrounded by plates 2’, *3’ and 3’’. G. geomunensis was morphologically characterized by an S-type ventral organization, descending with a displacement of one cingulum width and bearing one, two or three prominent antapical spines of similar size. The cell surface, which was distinct from other Gonyaulax species, was thick and heavily reticulated into numerous polygonal areas. The reticulation was deeply excavated. The phylogenetics revealed that G. geomunensis and G. whaseongensis belong to different clades, and that there are two ribotypes of G. polygramma, which were morphologically indistinguishable. These species had a close phylogenetic relationship to G. hyalina, and all of them were characterized by dextral torsion. G. whaseongensis, G. polygramma and G. geomunensis had different growth responses to changes of temperature and salinity, respectively, indicating that morphological and phylogenetic identification of Gonyaulax species can be supported by ecological niches.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":"62 1","pages":"48 - 67"},"PeriodicalIF":1.6,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41858002","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}

引用次数: 0

Baldinia droopii sp. nov. (Suessiales, Dinophyceae), a new species from a small rainwater rock pool near Tvärminne, south-western Finland Baldinia droopii sp.nov.（Suessiales，Dinophyceae），来自芬兰西南部Tvärminne附近一个小型雨水岩石池的一个新种

IF 1.6 4区生物学

Phycologia Pub Date : 2022-12-15 DOI: 10.1080/00318884.2022.2142430

G. Hansen, N. Daugbjerg, Ø. Moestrup

{"title":"Baldinia droopii sp. nov. (Suessiales, Dinophyceae), a new species from a small rainwater rock pool near Tvärminne, south-western Finland","authors":"G. Hansen, N. Daugbjerg, Ø. Moestrup","doi":"10.1080/00318884.2022.2142430","DOIUrl":"https://doi.org/10.1080/00318884.2022.2142430","url":null,"abstract":"ABSTRACT A dinoflagellate isolated from a small rainwater rockpool in Finland was found to be a new species of Baldinia, here described as B. droopii sp. nov. This is only the third formally described Baldinia species and the second described by modern methods. The new species had a complement of generic characters that clearly affiliated it to Baldinia: presence of an internal honeycomb structure, termed a lamellar body, a ventral fibre associated with the longitudinal basal body and a pentagonal resting cyst; and the absence of an apical structure, thecal plates and trichocysts. The most distinctive species-specific characters were the presence of a resting cyst with tubiform processes, a paratabulation matching the pattern of the motile cell, and a life cycle exhibiting a diel rhythm, alternating between motile and non-motile coccoid cells. Motile cells occurred during the light period, peaking after 3–4 h of light period, while practically no motile cells occurred during the dark period. LSU rDNA sequences confirmed B. droopii as a new species, showing c. 14% sequence difference compared to B. anauniensis. Asexual reproduction occurred primarily by binary fission or via a so-called division cyst. Sexual reproduction occurred in the culture indicating that D. droopii is homothallic. The zygote may form a resistant cyst with tubiform processes, but there were indications that this stage may be by-passed. Different stages of the asexual and putative sexual reproduction were observed and documented by video recordings.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":"62 1","pages":"68 - 82"},"PeriodicalIF":1.6,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44136644","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}

引用次数: 2

Measurement of DIC acquisition and evidence for a CO2 concentrating mechanism in Gephyrocapsa oceanica (Isochrysidales, Coccolithophyceae) 大洋藻DIC获取的测量和CO2浓缩机制的证据

IF 1.6 4区生物学

Phycologia Pub Date : 2022-12-05 DOI: 10.1080/00318884.2022.2136445

S. Larsen, J. Beardall

引用次数: 0

Agissea teruruhau sp. nov. (Peyssonneliales, Rhodophyta) and epiphyte Piriora waewaeiti gen. & sp. nov. (Gigartinales, Rhodophyta) from Manawatāwhi, New Zealand Agissea teruruhau sp.nov.（Peyssonneliales，Rhodophyta）和新西兰Manawatāwhi的附生植物Piriora waewaeiti gen.&sp.nov..（Gigartinales，Rhodaphyta）

IF 1.6 4区生物学

Phycologia Pub Date : 2022-11-21 DOI: 10.1080/00318884.2022.2132054

W. Nelson, Bruce Ngauma, Jerry H. Norman, S. Ringham, J. Sutherland

引用次数: 0

The role of environmental variables in shaping temperate coralline algae communities across large spatial scales 环境变量在大空间尺度上塑造温带珊瑚藻群落中的作用

IF 1.6 4区生物学

Phycologia Pub Date : 2022-11-18 DOI: 10.1080/00318884.2022.2133480

B. Twist, A. Rowden, C. Hepburn, W. Nelson

{"title":"The role of environmental variables in shaping temperate coralline algae communities across large spatial scales","authors":"B. Twist, A. Rowden, C. Hepburn, W. Nelson","doi":"10.1080/00318884.2022.2133480","DOIUrl":"https://doi.org/10.1080/00318884.2022.2133480","url":null,"abstract":"ABSTRACT Coralline algae are ecologically important macroalgae providing settlement cues and habitat for a number of marine organisms. They are abundant in a wide range of habitats in tropical to polar systems and are at severe risk from a number of local and global anthropogenic stressors. Despite their ecological importance, there are large gaps in understanding coralline algae diversity patterns and abiotic drivers of this diversity. Furthermore, recent advances in molecular identifications have revealed larger diversity than previously estimated through morphological approaches. The aim of this study was to explore coralline algal community composition in a modern context using DNA-based species identifications and to examine broad-scale environmental variables driving community structure around the New Zealand coastline. Hierarchical cluster techniques identified seven distinct coralline algal communities in the region. Sea surface temperature (SST) and light at seabed explained significant variation in coralline algal community composition, with SST explaining the highest amount of variation. Both SST and light are important for the growth, calcification and survival of coralline algae, and responses to these environmental parameters can vary widely among species. Wave exposure indices and turbidity were not found to have a large influence in shaping coralline community structure, most likely due to the ability of coralline algae to tolerate mechanical stress and periods of intense sand scouring and burial. Understanding the drivers structuring diversity, particularly for ecologically important primary producers, provides insights into community and ecosystem functioning and contributes to our baseline understanding of current species distribution.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":"1 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2022-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45773139","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}

引用次数: 1

Diversity of monosaccharides and glycosidic linkages on extracellular polysaccharides of the microalga Ankistrodesmus (Chlorophyceae) 蓝藻(Ankistrodesmus)胞外多糖单糖和糖苷键的多样性

IF 1.6 4区生物学

Phycologia Pub Date : 2022-11-15 DOI: 10.1080/00318884.2022.2136455

I. L. Bagatini, Fabrício Sebastiani Meccheri, Berit Smested Paulsen, T. Garcia Da Silva, H. Barsett, A. Henriques Vieira

{"title":"Diversity of monosaccharides and glycosidic linkages on extracellular polysaccharides of the microalga Ankistrodesmus (Chlorophyceae)","authors":"I. L. Bagatini, Fabrício Sebastiani Meccheri, Berit Smested Paulsen, T. Garcia Da Silva, H. Barsett, A. Henriques Vieira","doi":"10.1080/00318884.2022.2136455","DOIUrl":"https://doi.org/10.1080/00318884.2022.2136455","url":null,"abstract":"ABSTRACT The diversity of monosaccharides and glycosidic linkages of extracellular polysaccharide (EPS) of high molecular weight were studied in strains morphologically assigned to the genus Ankistrodesmus. EPSs of seven strains were similar in both monosaccharides and glycosidic linkages, but showed exclusive characteristics or enough differences in proportions to distinguish strains. Fucose, glucose, rhamnose, mannose and galactose occurred in relatively high percentages in all strains. The strain CCMA-UFSCar 423, excluded from the genus Ankistrodesmus by the molecular marker tufA, was the only one containing galacturonic acid. Arabinose was found only in one A. densus strain (CCMA-UFSCar 239). The species A. densus and A. stipitatus, which are known to have, respectively, stable mucilaginous capsules and pads in aqueous media, presented high percentages of the hydrophobic fucose and rhamnose on their polysaccharides. However, the strain CCMA-UFSCar 83, the only non-colonial A. densus, had low proportions of rhamnose. We also found variations in glycosidic linkages, and some of them were specific to one strain (e.g. 1-3 glucose in A. stipitatus). Conversely, the absence of common linkages was noteworthy for the strain outside the Ankistrodesmus clade, the CCMA-UFSCar 423. The data revealed important diversity in monosaccharides and linkages of the EPS within a single microalgae genus, and an important intraspecific diversity using a single growing condition. These differences could be useful as potential chemotaxonomic tools to help discriminating the Ankistrodesmus genus or species, but also for future studies on intraspecific diversity within the genus. Moreover, the results show the relevance of studying and conserving closely related strains to preserve biodiversity. The diverse composition of high molecular weight EPSs shows a great potential for prospecting EPSs of economic interest.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":"62 1","pages":"36 - 47"},"PeriodicalIF":1.6,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47402630","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}

引用次数: 1

Taxonomic changes in the Lomentariaceae (Rhodymeniales, Rhodophyta): Yendoa gen. nov. and Ceratodictyon sanctae-crucis sp. nov. Lomentariaceae（Rhodimeniales，Rhodophyta）的分类变化：Yendoa gen.nov.和Ceratodictyon sancae cruis sp.nov。

IF 1.6 4区生物学

Phycologia Pub Date : 2022-11-06 DOI: 10.1080/00318884.2022.2133269

Cibele Conceição dos Santos, José Marcos de Castro Nunes, G. N. Santos, Edilene Maria dos Santos Pestana, V. Cassano, Goia de Mattos Lyra

{"title":"Taxonomic changes in the Lomentariaceae (Rhodymeniales, Rhodophyta): Yendoa gen. nov. and Ceratodictyon sanctae-crucis sp. nov.","authors":"Cibele Conceição dos Santos, José Marcos de Castro Nunes, G. N. Santos, Edilene Maria dos Santos Pestana, V. Cassano, Goia de Mattos Lyra","doi":"10.1080/00318884.2022.2133269","DOIUrl":"https://doi.org/10.1080/00318884.2022.2133269","url":null,"abstract":"ABSTRACT The Lomentariaceae, previously treated as subfamily Lomentarioideae in the family Champiaceae, is one of the six families currently classified in the Rhodymeniales. Relationships within the family are not well-established, and new genera have been segregated from Lomentaria, a notoriously polyphyletic taxon as currently circumscribed. The lack of access to molecular data of type specimens has limited the taxonomic clarifications within the Lomentariaceae. Using new collections from Brazil, historical collections and data available in GenBank, we generated rbcL and COI-5P phylogenies of the Lomentariaceae, and we used species delimitation methods to assess the species-level diversity among sequences. A nuclear LSU rDNA phylogeny, although less representative in number of taxa, confirmed our findings. Our results recovered Ceratodictyon and Semnocarpa as monophyletic, whereas Lomentaria was polyphyletic. Integrating phylogenetic analyses, analyses of genetic variance, and morphological analyses, we revealed a new species, Ceratodictyon sanctae-crucis sp. nov., collected on the coast of Bahia (northeastern Brazil). Having included a newly generated sequence of the holotype of Lomentaria sinensis, a heterotypic synonym of L. hakodatensis, and a sequence from a sample collected near the type locality of L. hakodatensis, we propose the new genus Yendoa gen. nov. to accommodate this species. Our results support a more phylogenetically coherent taxonomic scheme for the Lomentariaceae, which now includes only monophyletic genera.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":"62 1","pages":"19 - 28"},"PeriodicalIF":1.6,"publicationDate":"2022-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44763491","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}

引用次数: 1

Marine algae of Greenland 格陵兰岛的海藻

IF 1.6 4区生物学

Phycologia Pub Date : 2022-11-02 DOI: 10.1080/00318884.2022.2141979

K. Gunnarsson

引用次数: 0

Confirmation of Lithophyllum trincomaliense comb. & stat. nov. and of L. validum (Corallinales, Rhodophyta) as distinct species based on genetic and morpho-anatomical analyses of type material 三叶草梳的确认。&根据类型材料的遗传和形态解剖分析，将L.validum（珊瑚目，红藻门）作为不同的物种

IF 1.6 4区生物学

Phycologia Pub Date : 2022-11-02 DOI: 10.1080/00318884.2022.2128572

A. Kato, N. Muangmai, M. Baba

{"title":"Confirmation of Lithophyllum trincomaliense comb. & stat. nov. and of L. validum (Corallinales, Rhodophyta) as distinct species based on genetic and morpho-anatomical analyses of type material","authors":"A. Kato, N. Muangmai, M. Baba","doi":"10.1080/00318884.2022.2128572","DOIUrl":"https://doi.org/10.1080/00318884.2022.2128572","url":null,"abstract":"ABSTRACT The non-geniculate coralline alga Lithophyllum okamurae includes two infraspecific taxa, L. okamurae f. trincomaliense and L. okamurae f. validum (currently regarded as an independent species, L. validum), which were described from Sri Lanka solely on the basis of morpho-anatomical features. We investigated the taxonomic status of these two taxa using comparable DNA sequence data (psbA, rbcL, partial LSU rDNA, and COI) and complementary morpho-anatomical features from type material and from specimens whose sequences were linked to type material. Our molecular analyses showed that both taxa are well-defined and are adequately treated as independent species, and that they are distantly related to L. okamurae. Morpho-anatomically, L. trincomaliense and L. validum were nearly indistinguishable, both possessing well-developed fruticose thalli and lacking trichocytes, the only distinguishable features being the shapes of the branch tips (round for L. trincomaliense vs flattened for L. validum). The present study confirmed two Lithophyllum species from the Indian Ocean. Seven infraspecific taxa have been ascribed to L. okamurae; one was shown to be conspecific and four are now confirmed to be distinct species, including the two infraspecific taxa investigated in the current study.","PeriodicalId":20140,"journal":{"name":"Phycologia","volume":"61 1","pages":"669 - 678"},"PeriodicalIF":1.6,"publicationDate":"2022-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43725207","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}

引用次数: 1