IF 2.2 3区生物学

Fottea Pub Date : 2021-10-13 DOI: 10.5507/fot.2021.009

P. Dvořák, P. Hašler, D. Casamatta, A. Poulíčková

{"title":"ReviewUnderestimated cyanobacterial diversity: trends and perspectives of research in tropical environments","authors":"P. Dvořák, P. Hašler, D. Casamatta, A. Poulíčková","doi":"10.5507/fot.2021.009","DOIUrl":"https://doi.org/10.5507/fot.2021.009","url":null,"abstract":"Cyanobacteria are photo–oxygenic prokaryotes present in nearly all ecosystems, where they are important in global oxygen, carbon, and nitrogen cycles. They are often recognized as the harbingers of eutrophication in freshwater systems and are increasingly being noted as nuisance species in marine ecosystems such as coral reefs. In recent years, cyanobacteria have been intensely studied due to their toxicity, harmful bloom formation, and because their distribution and abundance are expected to increase with climate change. Nevertheless, for all of their importance, many gaps in our knowledge of cyanobacteria remain: the distribution, dispersal, and biogeography of these microorganisms are still not understood. Until 1994 little attention was paid to tropical cyanobacteria and their diversity, despite some harmful invasive species having their putative origins in tropical habitats. However, more practiced articulation and research has recently uncovered previously undescribed biodiversity, and in turn changed our knowledge of the evolutionary relationships within the Cyanobacteria. The purpose of this paper is to describe the challenges of working with the cyanobacteria and to review what we know of them from tropical habitats.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2021-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44330156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 10

Studies on type material from Kützing's diatom collection III: Synedra splendens (Kütz.) Kütz., Synedra aequalis (Kütz.) Kütz. and a note on Synedra obtusa W.Sm. Kützing硅藻标本类型材料的研究III:Synedra splitens（Kütz）Küts。，Synedra aequalis（库茨）库茨。以及一个关于Synedra obtusa W.Sm的注释。

IF 2.2 3区生物学

Fottea Pub Date : 2021-10-13 DOI: 10.5507/fot.2021.004

David M. Williams, B. Van de Vijver

引用次数: 3

New species of Iconella Jurilj (Bacillariophyta) from tropical areas of China 中国热带Iconella Jurilj属新种

IF 2.2 3区生物学

Fottea Pub Date : 2021-10-13 DOI: 10.5507/fot.2021.006

Y. Liu, Ziyi Jiang, J. Kociolek, Xinxin Lu, Yawen Fan

{"title":"New species of Iconella Jurilj (Bacillariophyta) from tropical areas of China","authors":"Y. Liu, Ziyi Jiang, J. Kociolek, Xinxin Lu, Yawen Fan","doi":"10.5507/fot.2021.006","DOIUrl":"https://doi.org/10.5507/fot.2021.006","url":null,"abstract":"Three distinctive species of the diatom genus Iconella Jurilj were described from tropical areas of China. These new species all have the canal raphe extending around valve margins, keel raised off the valve surface forming wings, fenestrae obvious and alar canals that are uniformly porous. Together these features suggest these species should be assigned to the newly re–established genus Iconella. Here we describe Iconella shiwana Yan Liu, Ziyi Jiang et Kociolek sp. nov., Iconella pseudoconstricta Yan Liu, Ziyi Jiang et Kociolek sp. nov. and Iconella uniformis Yan Liu, Ziyi Jiang et Kociolek sp. nov., all described on the basis of light and scanning electron microscope observations from material collected from Hainan and Southern Guangxi Provinces. Iconella shiwana differs from other taxa by its isopolar valves and broadly round apices, tri– to quadriseriate short striae and large elliptical hyaline area in the valve center. I. pseudoconstricta is also isopolar, but it has acute ends and a constricted valve center. I. uniformis has heteropolar valves with a broadly rounded head pole and acute foot pole, a large spine is present near the head pole, and hook–like helictoglossae present at the foot pole. Our previous studies in tropical areas in China showed the diatom flora includes endemic taxa, although additional investigations are needed to explore and describe the abundant biodiversity there.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2021-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47052851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Nupela semifasciata (Bacillariophyceae), a new species from subtropical lotic environments in Western Paraná State, Brazil 巴西西巴拉那州亚热带乳液环境中的一个新种半筋膜裸藻（Bacillarophyceae）

IF 2.2 3区生物学

Fottea Pub Date : 2021-10-13 DOI: 10.5507/fot.2021.002

Mailor Wellinton Wedig Amaral, G. Medeiros, Vanessa Daufenbach, Morgana Suszek Gonçalves, Thelma Alvim Veiga Ludwig, Norma Catarina Bueno

{"title":"Nupela semifasciata (Bacillariophyceae), a new species from subtropical lotic environments in Western Paraná State, Brazil","authors":"Mailor Wellinton Wedig Amaral, G. Medeiros, Vanessa Daufenbach, Morgana Suszek Gonçalves, Thelma Alvim Veiga Ludwig, Norma Catarina Bueno","doi":"10.5507/fot.2021.002","DOIUrl":"https://doi.org/10.5507/fot.2021.002","url":null,"abstract":"During a survey on freshwater epilithic diatoms from subtropical lotic environments belonging to the Cascavel River microbasin, Paraná State, Brazil, we observed populations of a new Nupela Vyverman et Compère species. Morphological and meristic analyses were performed using light and scanning electron microscopy, resulting in the description of Nupela semifasciata sp. nov. This species is characterized by elliptic–lanceolate valves containing subcapitate apices in larger individuals and broadly rostrate–rounded apices in smaller ones, while the length/width ratio gradually decreases as the individuals become smaller. The central area unilaterally reaches the margin and always interrupts the row of areolae on the valve mantle. The valve mantle is externally composed of a second row of areolae near the apices. We cross–checked information with similar Nupela taxa, highlighting the main features that separate them. Nupela semifasciata was found in streams with acidic–neutral pH, low conductivity and low to high nutrient concentrations.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2021-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46351131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Analysis of some species resembling Fragilaria capucina (Fragilariaceae, Bacillariophyta) 几种类似于七尖杉的物种分析（杉科，硅藻门）

IF 2.2 3区生物学

Fottea Pub Date : 2021-10-13 DOI: 10.5507/fot.2021.001

B. Van de Vijver, David M. Williams, M. Kelly, Amelie Jarlman, C. E. Wetzel, L. Ector

{"title":"Analysis of some species resembling Fragilaria capucina (Fragilariaceae, Bacillariophyta)","authors":"B. Van de Vijver, David M. Williams, M. Kelly, Amelie Jarlman, C. E. Wetzel, L. Ector","doi":"10.5507/fot.2021.001","DOIUrl":"https://doi.org/10.5507/fot.2021.001","url":null,"abstract":"Based on literature data, Fragilaria capucina seems to be a widespread species, often split into a large number of varieties. In the present study, the original type material was investigated, together with the type material of two varieties, originally described by Grunow as the var. acuta and the var. acuminata and the type material of Fragilaria sandellii and F. nevadensis. The results of all morphological analyses indicated that F. capucina is clearly different from the other species based on the number of rimoportulae, valve outline and spine morphology. The var. acuta and var. acuminata are conspecific with F. nevadensis and are added as synonyms of the latter. Additionally, three unidentified populations from Sweden and the United Kingdom that showed some resemblance to F. capucina were analysed. Using detailed LM and SEM observations, these three populations showed sufficient morphological differences from all other Fragilaria species and are therefore described as new for science: F. malouana Van de Vijver et Jarlman nov. sp., F. battarbeeana Van de Vijver, M.Kelly, C.E.Wetzel et Ector nov. sp. and F. ennerdalensis Van de Vijver, M.Kelly, C.E.Wetzel et Ector nov. sp.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2021-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48107289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 4

Description of two new species of cstylefrom China based on thecstyle 基于该样式的两个中国菊科新种记述

IF 2.2 3区生物学

Fottea Pub Date : 2021-09-07 DOI: 10.5507/fot.2021.011

Fangfang Cai, Gongliang Yu, Yuchen Liu, Yuan-Zhi Sun, Renhui Li

引用次数: 4

Planothidium scrobiculatum sp. nov. (Bacillariophyta), a new monoraphid diatom from freshwater Pleistocene deposits of South America Planothidium scrobiculatum sp. 11 .(硅藻门):南美洲淡水更新世沉积物中一种新的单孢硅藻

IF 2.2 3区生物学

Fottea Pub Date : 2021-04-01 DOI: 10.5507/FOT.2020.016

G. Marquardt, Denise C. Bicudo, C. Bicudo, M. Ledru, L. Ector, C. E. Wetzel

{"title":"Planothidium scrobiculatum sp. nov. (Bacillariophyta), a new monoraphid diatom from freshwater Pleistocene deposits of South America","authors":"G. Marquardt, Denise C. Bicudo, C. Bicudo, M. Ledru, L. Ector, C. E. Wetzel","doi":"10.5507/FOT.2020.016","DOIUrl":"https://doi.org/10.5507/FOT.2020.016","url":null,"abstract":"A new monoraphid diatom species appeared successively in paleolimnological records from a Quaternary sediment core (1.5±0.1 Ma) retrieved from Colonia basin (Brazilian Coastal Plain, Atlantic Forest, Sao Paulo Metropolitan Region), and is formally described as Planothidium scrobiculatum sp. nov. We studied the new species through light and scanning electron microscopy and discussed its similarity to other members of the genus. The new species has a unique combination of morphological features that allow its separation from all other species in the genus: (1) lanceolate valve outline with cuneate apices, (2) multiseriate striae composed of two to four rows of irregular sized areolae on the rapheless sternum valve (SV), not interrupted at the valve mantle junction, and (3) arrangement of areolae on the valve mantle, grouped in 3 or 4 rows, each composed of 2 to 3 areolae on the SV. Nevertheless, the new species main diagnostic feature is the occurrence of numerous, unusual, small shallow depressions externally located on the SV along the axial area, cavum, and virgae. As a result, P. scrobiculatum is different from similar species under LM and SEM by some evident characters or a combination of characters. This study contributes to the knowledge of the so far understudied biodiversity of microorganisms of tropical regions. In addition, the above-mentioned diversity patterns and the wealth of new diatom taxa inside and around the Colonia basin (many yet to be described) suggest that further samplings from other localities may provide an insight into its habitat preferences and range, since this area is an exceptional biological entity, worthy of further study.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"53-61"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46621222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Neochroococcus gongqingensis gen. et sp. nov., a new member of coccoid cyanobacteria from a watercourse, Eastern China 龚青新球菌（Neochroococcus gong qingensis gen.et sp.nov.），中国东部某河道球虫蓝细菌的一个新成员

IF 2.2 3区生物学

Fottea Pub Date : 2021-04-01 DOI: 10.5507/FOT.2020.015

Ruozhen Geng, Yilang Wang, Fangfang Cai, Yige Zhang, Ping Yang, Guofei Dai, Renhui Li, Gongliang Yu

{"title":"Neochroococcus gongqingensis gen. et sp. nov., a new member of coccoid cyanobacteria from a watercourse, Eastern China","authors":"Ruozhen Geng, Yilang Wang, Fangfang Cai, Yige Zhang, Ping Yang, Guofei Dai, Renhui Li, Gongliang Yu","doi":"10.5507/FOT.2020.015","DOIUrl":"https://doi.org/10.5507/FOT.2020.015","url":null,"abstract":"The taxonomy of coccoid cyanobacteria has been largely revised in recent years. In this study, a novel coccoid cyanobacterial strain was isolated from a watercourse at the Poyang Lake Model Research Base, Jiangxi province, Eastern China. A polyphasic approach combining morphological and molecular testing was used to characterize this strain referred to as CHAB 4018. Regarding colonial form and cellular spatial arrangement, this strain was morphologically similar to strains of the genus Eucapsis. The maximum 16S rRNA gene sequence similarity of this strain to the currently described cyanobacteria genera was 93.40%, exceeding the cutoff for genus delimitation in bacteriology. Furthermore, a phylogenetic tree based on 16S rRNA gene sequences indicated that strain CHAB 4018 formed a unique clade in the family Chroococcaceae and was phylogenetically close to the recently established genus Cryptococcum but distant from the Chroococcus 'sensu stricto' clade and from Eucapsis. Thus, a novel coccoid cyanobacterial genus with a new species is here described as Neochroococcus gongqingensis. A large phylogenetic tree using more strains suggested phylogenetic intermixture of Chroococcus-like and Eucapsis-like cyanobacteria, suggesting the need for further studies on the phylogeny and taxonomy of coccoid cyanobacteria.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"44-52"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45138220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 3

New and interesting freshwater diatoms (Bacillariophyceae) from a biodiversity hotspot area in China 中国生物多样性热点地区淡水硅藻(硅藻门)的新发现

IF 2.2 3区生物学

Fottea Pub Date : 2021-04-01 DOI: 10.5507/FOT.2020.013

Y. Liu, J. Kociolek, Quanxi Wang, Lixin Li, Yawen Fan

引用次数: 1

Diversity of the genus Brasilonema (Nostocales, Cyanobacteria) in plant nurseries of central Florida (USA) with the description of three new species: B. fioreae sp. nov., B. santannae sp. nov. and B. wernerae sp. nov. 美国佛罗里达州中部苗圃中Brasilonema属（Nostocales，Cyanobacteria）的多样性及其三个新种的描述：B.fioreae sp.nov.、B.santannae sp.nov..和B.wernerae sp.nov。

IF 2.2 3区生物学

Fottea Pub Date : 2021-04-01 DOI: 10.5507/FOT.2020.019

Maximiliano Barbosa, D. Berthold, Forrest W. Lefler, H. Iv

{"title":"Diversity of the genus Brasilonema (Nostocales, Cyanobacteria) in plant nurseries of central Florida (USA) with the description of three new species: B. fioreae sp. nov., B. santannae sp. nov. and B. wernerae sp. nov.","authors":"Maximiliano Barbosa, D. Berthold, Forrest W. Lefler, H. Iv","doi":"10.5507/FOT.2020.019","DOIUrl":"https://doi.org/10.5507/FOT.2020.019","url":null,"abstract":"Florida is a diverse region that supports abundant cyanobacterial diversity, especially in terrestrial environments. To exploit this environment for cyanobacterial diversity, several greenhouses from central Florida were sampled to identify common nuisance and contaminating algae. Most of the algae observed were mat forming, covering nursery pots, plants, and equipment which were macro- and microscopically morphologically analogous to Brasilonema. Although macroscopic thallus morphology was similar among the samples, microscopic morphological characteristics such as size, color, and sheath formation were disparate. To uncover the cryptic diversity, mats were processed for species isolation, culture, and molecular taxonomic identification. A total of eleven Brasilonema strains were isolated into culture and systematically identified using 16S rRNA and 16S-23S rRNA ITS sequences. Based on morphology and molecular data, five species of Brasilonema were found and three are new to science: B. fioreae, B. santannae, and B. wernerae.","PeriodicalId":55149,"journal":{"name":"Fottea","volume":"21 1","pages":"82-99"},"PeriodicalIF":2.2,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42604361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 4

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