Diatom Research最新文献_第5页

Tropical South America Diatom Database: a tool for studying the macroecology of microorganisms 热带南美洲硅藻数据库:研究微生物宏观生态学的工具

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-06-28 DOI: 10.1080/0269249x.2022.2078429

X. Benito, Melina Feitl, M. L. Carrevedo, M. Velez, J. Escobar, P. Tapia, M. Steinitz‐Kannan, S. Fritz

引用次数: 0

The type species of the diatom genus Chaetoceros 硅藻属毛藻的模式种

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-04-03 DOI: 10.1080/0269249X.2022.2066182

W. Kooistra, Wolf-Henning Kusber, D. Hernández-Becerril, M. Montresor, D. Sarno

{"title":"The type species of the diatom genus Chaetoceros","authors":"W. Kooistra, Wolf-Henning Kusber, D. Hernández-Becerril, M. Montresor, D. Sarno","doi":"10.1080/0269249X.2022.2066182","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2066182","url":null,"abstract":"Chaetoceros is one of the most abundant and diverse diatom genera in the phytoplankton of the world’s oceans. The genus was erected by Ehrenberg in 1844 for two species from the Southern Ocean: C. dichaeta and C. tetrachaeta. According to his description, the former possesses two setae per valve and the latter possesses four. Chaetoceros tetrachaeta, or any species with four setae per valve, has never been reported again. In spite of that, Boyer, in 1927, designated it as the lectotype of the genus. In order to comprehend what Ehrenberg meant with C. dichaeta and C. tetrachaeta we re-examined the type material preserved on mica slides and compared specimens therein with the original descriptions, the drawings published by Ehrenberg in 1872 and notes accompanying the slides. Since no types have ever been designated, we here lectotypify specimens for the two species, guided by Ehrenberg’s coding system explaining their location on the slides. Of the two species, C. dichaeta is well-studied and commonly reported. Its lectotype links unambiguously with those of specimens for which ultrastructural and molecular information has been published. Regarding C. tetrachaeta, our observations confirmed that each valve possesses just two setae, which are robust and thick, typical for the section Chaetoceros. A possible synonym, C. adelianus, occurs in the same region and exhibits the same overall morphology.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"37 1","pages":"81 - 88"},"PeriodicalIF":1.8,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42703421","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

Stauroneis terryi D.B. Ward ex T.C. Palmer: a forgotten diatom from northeastern North America D.B. Ward ex . T.C. Palmer:一种被遗忘的北美东北部硅藻

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-04-03 DOI: 10.1080/0269249X.2022.2078884

Marina G. Potapova, Caroline Gallen, Naomi Friedman

{"title":"Stauroneis terryi D.B. Ward ex T.C. Palmer: a forgotten diatom from northeastern North America","authors":"Marina G. Potapova, Caroline Gallen, Naomi Friedman","doi":"10.1080/0269249X.2022.2078884","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2078884","url":null,"abstract":"Stauroneis terryi D.B. Ward ex T.C. Palmer is a diatom so far reported from only five locations in the states of Connecticut, Massachusetts and Maine, USA, where it was collected in 1890—1911. There were no records of this large and rather conspicuous species in any collections made after 1911 despite the considerable number of diatom surveys and paleolimnological studies conducted in the northeastern USA. We studied material from the type locality of this species to document its morphology with SEM, and screened diatom slides representing recent and subfossil samples collected from 169 lakes in northeastern North America from 1979 to 2017 for the presence of this species. Using both whole-slide scanning and traditional microscopy, we detected S. terryi in 15 lakes in the northeastern USA north of 41° N latitude and in five lakes of Labrador and adjacent Quebec, Canada. In the USA, S. terryi populations have declined since pre-industrial times, although the species is still present in a few lakes with relatively undisturbed watersheds. Our observations demonstrate the value of museum collections for generating data on diatom ecology and biogeography and the need for the development of high-throughput methods of extracting information from diatom slides and images.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"37 1","pages":"155 - 163"},"PeriodicalIF":1.8,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46659347","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

Morphology and molecular phylogeny of Amphora baotuensis sp. nov., a new freshwater benthic diatom from a karst spring in China 中国喀斯特泉淡水底栖硅藻新种双耳藻的形态与分子系统发育

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-04-03 DOI: 10.1080/0269249X.2022.2063390

Yuhang Li, T. Nagumo, Kuidong Xu

引用次数: 2

Seasonal variations of diatoms in a low-latitude mountain lake: a case study from Douhu lake-Southeast China 低纬山地湖泊中硅藻的季节变化——以中国东南部豆湖为例

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-04-03 DOI: 10.1080/0269249X.2022.2091664

Jingkang Wang, Jie Li, Qi Cao, P. Rioual, G. Lei, B. Cai, Y. Zou, Hai Luo, Quanguo Li, Luo Wang

{"title":"Seasonal variations of diatoms in a low-latitude mountain lake: a case study from Douhu lake-Southeast China","authors":"Jingkang Wang, Jie Li, Qi Cao, P. Rioual, G. Lei, B. Cai, Y. Zou, Hai Luo, Quanguo Li, Luo Wang","doi":"10.1080/0269249X.2022.2091664","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2091664","url":null,"abstract":"In the scientific literature on diatom ecology whether temperature drives changes in diatom assemblage directly or indirectly remains a subject of debate. In order to clarify the relationship between temperature and diatom assemblage composition, we focused on a region with significant seasonal changes but without a freezing period. From March 2016 to March 2018, sediment trap samples were collected monthly to monitor the seasonal succession of diatoms in Douhu Lake, in subtropical southeast China. The results show that in 2016 the variations in abundance of Aulacoseira granulata and Aulacoseira ambigua followed an obvious seasonal pattern, corresponding to the seasonal variation in water and air temperature. In 2016, the thermophilic taxon A. granulata was dominant in the warm season, and in the cold season its abundance declined, while that of A. ambigua, a taxon better adapted to cooler conditions, increased relatively. In 2017, however, there was no such typical seasonal variation. In the cold season of 2017, A. granulata did not decline and there was no significant increase in the cold-preferring A. ambigua. This was related to the large drop in the lake level associated with human activity (substantial water extraction) that occurred during the winter of 2017, which disturbed the natural seasonal fluctuation in water temperature. Thus, in 2017, while air temperature followed the regular seasonal cycle, lake water temperature did not decrease significantly in winter, which allowed A. granulata to maintain a relatively high abundance in the cold season. From these results and an extensive survey of the literature, we conclude that water temperature, more than the seasonal succession, directly drives the fluctuation in abundance of these two Aulacoseira species.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"37 1","pages":"165 - 178"},"PeriodicalIF":1.8,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41813455","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

Gomphotheca marciae (Bacillariophyceae: Bacillariaceae), a new species in a rarely seen genus 一罕见属一新种。(硅藻科:硅藻科)

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-04-03 DOI: 10.1080/0269249X.2022.2064552

C. Lobban, Gabriella Helene Prelosky

引用次数: 1

Cocconeis fetscheriana sp. nov. (Bacillariophyta) from streams in California (USA) with reference to the cingulum variability within the placentuloid species complex 加利福尼亚(美国)河流中的芽胞藻(bacariophyta)与胎盘样物种复合体中带带变异的关系

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-04-03 DOI: 10.1080/0269249X.2022.2074145

R. Stancheva

{"title":"Cocconeis fetscheriana sp. nov. (Bacillariophyta) from streams in California (USA) with reference to the cingulum variability within the placentuloid species complex","authors":"R. Stancheva","doi":"10.1080/0269249X.2022.2074145","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2074145","url":null,"abstract":"A novel diatom species, Cocconeis fetscheriana, is described from streams in California (USA). Detailed light and scanning electron microscopy of its frustules reveal a unique combination of characters. These are a highly variable and often irregular valve outline, rapheless sternum valves with characteristic dumbbell-shaped areolae, forming 7–14 longitudinal rows per hemi-valve, a lanceolate, slightly diagonal sternum separated from the valve apices by up to four areolae, robust closed smooth valvocopula attached to sternum valve mantle by an undulate rim, and raphe valve with distinct submarginal areolae, which always circumradiate the raphe apices. Teratological forms are commonly observed in this novel species and are discussed. Environmental data and morphological comparisons with similar Cocconeis taxa with open valvocopulae are provided. The importance of detailed characterization of the cingulum structure with a particular focus on the rapheless sternum valve valvocopula as diagnostic features in Cocconeis is discussed. Examples of cingulum ultrastructure variability are included from additional undescribed Cocconeis species from another stream in California.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"37 1","pages":"127 - 144"},"PeriodicalIF":1.8,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41722284","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

DNA barcoding reveals a new species of Stephanodiscus Ehrenberg DNA条形码技术揭示了一种新的铁饼属植物

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-04-03 DOI: 10.1080/0269249X.2022.2078427

Konrad Schultz, T. Hübener, Olivier Jacques, A. Springer, Marcus Frank, Mirko Dressler

{"title":"DNA barcoding reveals a new species of Stephanodiscus Ehrenberg","authors":"Konrad Schultz, T. Hübener, Olivier Jacques, A. Springer, Marcus Frank, Mirko Dressler","doi":"10.1080/0269249X.2022.2078427","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2078427","url":null,"abstract":"The taxonomic situation of the species complex around Stephanodiscus minutulus/parvus is controversial. Insufficient species description and fossil type material contribute to persistent confusion. Håkansson & Kling (1990) described S. binatus as another morphologically similar species in this group. Following the reinvestigation of the type materials of S. minutulus and S. parvus by Houk et al. (2014), it seems that these names are often falsely applied to S. binatus. Monoclonal strains of the S. minutulus/parvus/binatus species complex from European water bodies were established for morphological and molecular analyses. Most of the strains belonged to S. binatus, which seems to be very common in meso- to eutrophic waters in middle Europe. Differing in the barcoding markers, the remaining strains represented a new species, S. neglectus sp. nov., morphologically similar to S. binatus. Stephanodiscus minutulus and S. parvus were not found. Seven strains of S. neglectus sp. nov., seven strains of S. binatus and two strains of Cyclostephanos invisitatus were subjected to detailed morphometric investigation. Four strains of Stephanodiscus hantzschii, Stephanodiscus neoastrea, Cyclostephanos dubius were also included in the molecular analysis. The morphological differential diagnosis of S. neglectus sp. nov. from S. binatus is difficult, but the molecular results show that the species are distinctly different. Using three different loci the distance between the new species and S. binatus equals the distance between S. binatus and S. hantzschii.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"37 1","pages":"89 - 106"},"PeriodicalIF":1.8,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45556832","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

Morphology of Amphora lunulata A.H. Wachnicka & E.E. Gaiser and its transfer to Seminavis D.G. Mann 双耳壶的形态及向双耳壶的转移

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-01-02 DOI: 10.1080/0269249X.2022.2041490

Chenhong Li, Lanyu Tan, Yahui Gao, Xuesong Li, Lin Sun, Junrong Liang, Jun Zhang, Luqiang Huang, Changping Chen

{"title":"Morphology of Amphora lunulata A.H. Wachnicka & E.E. Gaiser and its transfer to Seminavis D.G. Mann","authors":"Chenhong Li, Lanyu Tan, Yahui Gao, Xuesong Li, Lin Sun, Junrong Liang, Jun Zhang, Luqiang Huang, Changping Chen","doi":"10.1080/0269249X.2022.2041490","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2041490","url":null,"abstract":"An amphoroid diatom epiphytic on seagrass leaves from Hainan Province, southern China was identified as Amphora lunulata Wachnicka & Gaiser. It is characterized by a semi-elliptical valve with acute apices, ventral striae interrupted at the centre, and an axial area, which is well developed on the dorsal side but narrower at the centre, in accordance with its original description. However, as seen under the scanning electronic microscope, A. lunulata presents a combination of features that is consistent with the description of the genus Seminavis, i.e., slit-like areolae covered by hymenes, terminal fissures hooked toward the dorsal side and unornamented valvocopula. Therefore, we redefined the taxonomic status of Amphora lunulata A.H. Wachnicka & E.E. Gaiser and transferred it to the genus Seminavis. We compared the morphometric characteristics of Seminavis lunulata to those of the original description from Wachnicka & Gaiser (2007) and other taxa in Seminavis, including Seminavis atlantica M. Garcia, Seminavis eulensteinii (Grunow) D.B. Danielidis, K. Ford & D. Kennett, Seminavis heidenii D.G. Mann in D.B. Danielidis & D.G. Mann.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"37 1","pages":"63 - 69"},"PeriodicalIF":1.8,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45012027","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

A new monoraphid diatom species from the genus Karayevia sensu lato (Bacillariophyceae: Stauroneidaceae) with remarks on taxonomy and phylogeny of the genus 文章标题单蚜虫硅藻属一新种(硅藻科:银藻科)及其分类和系统发育的评述

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-01-02 DOI: 10.1080/0269249X.2022.2039780

N. Tseplik, A. Glushchenko, Y. Maltsev, I. Kuznetsova, S. Genkal, J. Kociolek, M. Kulikovskiy

引用次数: 4