Diatom Research最新文献_第7页

A re-investigation of lake sediment diatoms from the Vestfold Hills, Antarctica, using an updated, fine-grained taxonomy 使用更新的细粒度分类学对南极洲维斯特福尔德山湖泊沉积物硅藻的重新调查

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-07-02 DOI: 10.1080/0269249x.2020.1794982

Jordan Bishop, K. Kopalová, T. Kohler, B. Van de Vijver, D. Roberts, A. McMinn, J. Gibson

{"title":"A re-investigation of lake sediment diatoms from the Vestfold Hills, Antarctica, using an updated, fine-grained taxonomy","authors":"Jordan Bishop, K. Kopalová, T. Kohler, B. Van de Vijver, D. Roberts, A. McMinn, J. Gibson","doi":"10.1080/0269249x.2020.1794982","DOIUrl":"https://doi.org/10.1080/0269249x.2020.1794982","url":null,"abstract":"The non-marine diatom flora of the Antarctic continent is currently being revised as recent work within the Maritime and Sub-Antarctic regions has unveiled a number of new endemic species. The under reporting of endemic species is partially due to the historic ‘force-fitting’ of Antarctic species into European names. Within East Antarctica, the Vestfold Hills are an extensively studied area known for their diversity of lakes spanning a salinity gradient, for which Diatoms of the saline lakes of the Vestfold Hills, Antarctica by Roberts & McMinn (1999) has a primary identification resource for over two decades. To determine if improved taxonomic resolution alters the ecological interpretation of these lakes, 30 prepared lake sediment samples first examined by Roberts & McMinn (1999) were re-analysed using an updated, fine-grained taxonomic approach. Our analyses confirmed the role of salinity and alkalinity in structuring Vestfold Hills diatom communities. Thus, the increased taxonomic resolution did not change the original ecological interpretation. However, the revised flora of the Vestfold Hills features 37 species endemic to the Antarctic Region, including members of Luticola, Sabbea and Halamphora, among others. In total, 183 taxa across 38 genera were observed, in contrast to the 67 taxa reported in the original work. The revised flora, including a larger proportion of endemic species, may improve our understanding of the diatom community in general and has wider implications for both conservation and biodiversity estimates of Antarctica. More widely applied, these data can be incorporated into larger studies of Antarctic microbial biogeography and biodiversity.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"35 1","pages":"231 - 254"},"PeriodicalIF":1.8,"publicationDate":"2020-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0269249x.2020.1794982","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43064203","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

Late Holocene diatoms in sediment cores from the Gonggeomji Wetland in Korea 韩国宫吉湿地沉积物岩心中的晚全新世硅藻

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-06-29 DOI: 10.1080/0269249x.2020.1749136

Sang Deuk Lee, Hoil Lee, Jinsoon Park, S. Yun, Jin-Young Lee, Jaesoo Lim, Mirye Park, D. Kwon

引用次数: 3

A rediscovery of Cymbella mirabilis Hustedt, a rare endemic diatom, and description of Alveocymba gen. nov. 一种罕见的地方性硅藻Cymbella mirabilis Hustedt的重新发现，以及对肺泡藻gen. nov.的描述。

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-06-18 DOI: 10.1080/0269249x.2020.1772888

D. Kapustin, J. Kociolek, A. Glushchenko, M. Kulikovskiy

引用次数: 8

Fascinorbis gen. nov., a new genus of Stephanodiscaceae (Bacillariophyta) from a Late Miocene lacustrine diatomite 晚中新世湖相硅藻土中木盘科硅藻土一新属

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-04-02 DOI: 10.1080/0269249X.2020.1764870

J. Stone, M. Edlund, Andrew J. Alverson

引用次数: 1

New and interesting diatoms from Tibet. III. Valve ultrastructure of two Neidium Pfitzer species from Tibet: comparison with other morphological groups of Neidium and consideration of phylogenetic relationships within the genus 来自西藏的新的有趣的硅藻。3西藏两种麻豆属植物气门的超微结构:与其它形态类群的比较及属内系统发育关系的探讨

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-04-02 DOI: 10.1080/0269249X.2020.1737239

J. Kociolek, Nini Cui, QI Liu, S. Xie, Jia Feng, Jie Wang, Ying Shi

引用次数: 1

Non-blue Haslea species (Bacillariophyceae: Naviculaceae) in the benthic marine flora of Guam (Mariana Islands, Western Pacific Ocean). 关岛(马里亚纳群岛，西太平洋)底栖海洋植物区系中的非蓝色haaslea种(硅藻科:Naviculaceae)。

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-04-02 DOI: 10.1080/0269249X.2020.1761887

C. Lobban, C. Perez, M. Ashworth

{"title":"Non-blue Haslea species (Bacillariophyceae: Naviculaceae) in the benthic marine flora of Guam (Mariana Islands, Western Pacific Ocean).","authors":"C. Lobban, C. Perez, M. Ashworth","doi":"10.1080/0269249X.2020.1761887","DOIUrl":"https://doi.org/10.1080/0269249X.2020.1761887","url":null,"abstract":"In recent years the taxonomy of Haslea has been in flux. We describe several Haslea taxa from Guam, including four new species, in light of these recent findings. Four delicate, fusiform Haslea species are described from a variety of benthic habitats on coral reefs. These species, H. fusiformis comb. nov. and H. alexanderi, H. apoloniae and H. guahanensis spp. nov. are distinguished by stria density, foramen (‘areola’) shape, and cell size from each other and from similar taxa. A key to all these taxa is provided. In addition, an arcuate species is described as Haslea arculata sp. nov. The presence of a bilayered wall is shown for all these taxa. We compare the morphology of specimens reported as H. howeana from Guam with Navicula tsukamotoi, recently described from Okinawa, and with ‘Navicula cf. howeana’ from Puerto Rico. We provide the first account of the complex cingulum of N. tsukamotoi. We conclude that our specimens match N. tsukamotoi and that H. howeana should be returned to Navicula, but we leave open the question of conspecificity.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"35 1","pages":"163 - 183"},"PeriodicalIF":1.8,"publicationDate":"2020-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0269249X.2020.1761887","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44879471","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

A new Sellaphora Mereschkowsky species (Bacillariophyceae) from Hainan Island, China, with comments on the current state of the taxonomy and morphology of the genus 海南岛Sellaphora Mereschkowsky一新种（硅藻门）及其属的分类学和形态学现状

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-01-02 DOI: 10.1080/0269249x.2020.1726470

Yan Liu, J. Kociolek, Xinxin Lu, Yawen Fan

{"title":"A new Sellaphora Mereschkowsky species (Bacillariophyceae) from Hainan Island, China, with comments on the current state of the taxonomy and morphology of the genus","authors":"Yan Liu, J. Kociolek, Xinxin Lu, Yawen Fan","doi":"10.1080/0269249x.2020.1726470","DOIUrl":"https://doi.org/10.1080/0269249x.2020.1726470","url":null,"abstract":"We present light and scanning electron microscope observations on a new species of the diatom genus Sellaphora, Sellaphora wangii Y.Liu & Kociolek, sp. nov., described from Hainan Island, China. This species has a raised conopeum with an axial groove or trough on either side of the axial area containing striae extending into the trough, and round depressions (i.e. pits) on the valve mantle at both apices. Our new species is distinctive and separated from other Sellaphora taxa by a unique combination of features that includes its valve outline, undulate raphe, and bow-tie shaped hymenes of the internal areola openings. The uncertainty and dynamic nature of the classification of Sellaphora prompted a review of the ultrastructural features found in species assigned to the genus. Based on this review, we identify four distinct groups of Sellaphora taxa organized by different combinations of ultrastructural features: stria structure, external and internal openings of the areolae, conopeum, polar bars, and apical pits. Based on the features present in our new species, it would be placed in the group that includes S. pupula, the generitype.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"35 1","pages":"85 - 98"},"PeriodicalIF":1.8,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0269249x.2020.1726470","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41525559","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: 5

Discostella lacuskarluki (Manguin ex Kociolek & Reviers) comb. nov.: a common nanoplanktonic diatom of Arctic and boreal lakes Discostella lacuskarluki（Manguin ex Kociolek&Reviers）梳子。十一月：北极和北方湖泊中常见的纳米浮游硅藻

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-01-02 DOI: 10.1080/0269249x.2020.1727569

Marina G. Potapova, Laurie Aycock, D. Bogan

{"title":"Discostella lacuskarluki (Manguin ex Kociolek & Reviers) comb. nov.: a common nanoplanktonic diatom of Arctic and boreal lakes","authors":"Marina G. Potapova, Laurie Aycock, D. Bogan","doi":"10.1080/0269249x.2020.1727569","DOIUrl":"https://doi.org/10.1080/0269249x.2020.1727569","url":null,"abstract":"Cyclotella lacuskarluki Manguin ex Kociolek & Reviers is a small diatom known only from the original drawing that provides little information on the morphology of this taxon. As Manguin’s original materials are lost, recently collected samples from Lake Karluk, Alaska, the type locality of the species, were studied with light and scanning electron microscopy to determine its identity. As a result of this investigation, C. lacuskarluki is transferred here to the genus Discostella. Discostella lacuskarluki is 2.5–7 µm in diameter, has a shallow mantle, a stellar pattern of alveoli in the valve centre that may be reduced or completely absent, bifurcating costae and 4–5 marginal fultoportulae opening externally by short thickened tubes with round openings. We observed this species in numerous lakes across Alaska, in Lake Tahoe, Nevada, in several lakes across Canada, and in tundra and tree-line lakes of Northeastern Siberia. Although direct comparison with other Discostella species is difficult because the small size of these diatoms requires high-resolution imagery to reveal ultrastructural details, it appears that D. lacuskarluki is conspecific with D. tatrica Procházková et al. recently described from lakes of Central Europe and also reported from the European part of Russia. It is also conspecific with D. nipponica (Skvotzov) Tuji & D. M. Williams known from Japan. The apparent wide distributional range of this species indicates that it has been overlooked and commonly reported as D. pseudostelligera or D. stelligera in arctic, boreal and alpine lakes.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"35 1","pages":"55 - 62"},"PeriodicalIF":1.8,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0269249x.2020.1727569","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47008683","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

Diatom types of R.E.M. Archibald from Lake Sibaya and Lake Nhlange, South Africa 南非锡巴亚湖和恩兰热湖R.E.M.Archibald的硅藻类型

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-01-02 DOI: 10.1080/0269249x.2020.1733099

Franco De Ridder, Jonathan C. Taylor

{"title":"Diatom types of R.E.M. Archibald from Lake Sibaya and Lake Nhlange, South Africa","authors":"Franco De Ridder, Jonathan C. Taylor","doi":"10.1080/0269249x.2020.1733099","DOIUrl":"https://doi.org/10.1080/0269249x.2020.1733099","url":null,"abstract":"Natural lakes are rarely found in South Africa and are usually restricted to coastal regions. One of the larger coastal lakes is Lake Sibaya, which is situated in North-Eastern Kwa-Zulu Natal, a subtropical summer rainfall region. In 1966 a survey of this and other smaller lakes connected to the Lake Sibaya system was conducted and diatom samples were collected, of which three were examined by R.E.M. Archibald, and from which nine new species were described. Archibald illustrated these new taxa using line drawings; the interpretation of such illustrations for species identification is sometimes difficult. For this reason we have re-examined the type material with the aim of producing light microscope (LM) and scanning electron microscope (SEM) micrographs of the species in question. All nine taxa described and illustrated by Archibald were found again in the type slides and photographed from the holotype slides using LM. Unfortunately the preserved type material was stored in un-buffered formalin and had degraded to a point where it could no longer be used for SEM. Additional desiccated samples collected during later expeditions between 1966 and 1972 were selected, based on similarity of locality and substratum, and used to obtain SEM micrographs. Again, all taxa could be documented from material in these additional samples. Of the nine taxa described, we transferred four to more appropriate genera, as they were originally described as species of Achnanthes and Navicula. Although Archibald’s line drawings were detailed and accurate, it was necessary to document these types using LM and SEM in order to make accurate designations at generic level and to facilitate identification of these taxa if found in other localities.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":"35 1","pages":"37 - 54"},"PeriodicalIF":1.8,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/0269249x.2020.1733099","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47735628","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

Two new species of Cymbella (Bacillariophyceae) from China, with comments on their valve dimensions 标题中国银藻属(硅藻科)二新种及其瓣径的评述

IF 1.8 3区生物学

Diatom Research Pub Date : 2020-01-02 DOI: 10.1080/0269249x.2020.1733100

Bing Liu, David M. Williams, Yan Li, Zhong-Sen Tang

引用次数: 3