Diatom Research最新文献_第6页

Updated distribution of the diatom Didymosphenia geminata (Lyngbye) Schmidt in Tierra del Fuego, Patagonia 巴塔哥尼亚火地岛硅藻Didymosphenia geminata（Lyngbye）Schmidt的最新分布

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-01-02 DOI: 10.1080/0269249X.2022.2047793

G. González Garraza, Patricia Rodríguez

{"title":"Updated distribution of the diatom Didymosphenia geminata (Lyngbye) Schmidt in Tierra del Fuego, Patagonia","authors":"G. González Garraza, Patricia Rodríguez","doi":"10.1080/0269249X.2022.2047793","DOIUrl":"https://doi.org/10.1080/0269249X.2022.2047793","url":null,"abstract":"In this study, we report new observations on the distribution of the invasive diatom Didymosphenia geminata on the island of Tierra del Fuego, southern Patagonia. We present new findings as well as data collected by the monitoring programme of the Government of the Tierra del Fuego. Didymosphenia geminata was first reported from the island in 2013, in the watershed of the Rio Grande, northeast of the island. In 2017, it was found in the Lapataia River, within the Tierra del Fuego National Park. More recently, we detected its presence at two more sites; one in Lake Fagnano, and in the Arroyo Grande, near the city of Ushuaia. Hence, in eight years, this invasive diatom has spread and reached the southern part of the island despite prevention measures applied in protected areas since 2014. Although D. geminata is already in Tierra de Fuego, the island is home to many water bodies with high conservation value. Monitoring the range expansion of this invasive diatom should continue since prevention is the only tool to prevent further expansion. This is particularly important because Ushuaia, in the southern part of the island, is a port from which many tourist companies depart for Antarctica, a continent not yet impacted by D. geminata.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47975629","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

Diversity of the genus Orthoseira Thwaites (Bacillariophyceae) from Southeast Asia and Rapa Nui Island with descriptions of four new taxa 东南亚和拉帕努伊岛正藻属的多样性及4个新分类群的描述

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-01-02 DOI: 10.1080/0269249X.2022.2043448

Mateusz Rybak, A. Glushchenko, A. Witkowski, H. LANGE-BERTALOT, M. Kulikovskiy

引用次数: 1

Four new Orthoseira Thwaites species from Maui, Hawaii, and the Columbia River Gorge, Oregon, with comments on frustular morphology in the genus 来自夏威夷毛伊岛和俄勒冈州哥伦比亚河峡谷的四个新的Orthoseira Thwaites物种，并对该属的截头体形态进行了评论

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-01-02 DOI: 10.1080/0269249X.2022.2044911

A. Danz, J. Kociolek

引用次数: 2

Fontina Gen. nov. (Bacillariophyta): a new diatom genus from a thermo-mineral spring of the French Massif Central (France) Fontina Gen.nov.（硅藻门）：法国中部地块热矿泉中的一个新硅藻属

IF 1.8 3区生物学

Diatom Research Pub Date : 2022-01-02 DOI: 10.1080/0269249X.2022.2033327

A. Beauger, C. E. Wetzel, O. Voldoire, Elisabeth Allain, V. Breton, D. Miallier, L. Ector

引用次数: 1

Diatom biogeography in freshwaters – new insights from between-region comparisons and the role of unmeasured environmental factors 淡水硅藻生物地理学——区域间比较和未测量环境因素作用的新见解

IF 1.8 3区生物学

Diatom Research Pub Date : 2021-12-08 DOI: 10.1080/0269249x.2021.1999859

J. Soininen, Vilja Tupola, Inka Voutilainen, M. Cantonati, Anette Teittinen

引用次数: 2

Diatom assemblages from an Eemian palaeolake in Northern Europe with morphological observations of rare Aulacoseira sp. resting spores 北欧Eemian古湖泊的硅藻组合及罕见的Aulacoseira sp.休眠孢子的形态学观察

IF 1.8 3区生物学

Diatom Research Pub Date : 2021-10-02 DOI: 10.1080/0269249X.2021.2001381

Anna Plikk, J. Risberg, K. Helmens

引用次数: 0

A simple method for making transverse cleavages of diatom frustules for scanning electron microscopy and its application 一种简单的硅藻晶体扫描电镜横向解理方法及其应用

IF 1.8 3区生物学

Diatom Research Pub Date : 2021-10-02 DOI: 10.1080/0269249X.2021.1986137

Nagisa Mayama, S. Mayama

{"title":"A simple method for making transverse cleavages of diatom frustules for scanning electron microscopy and its application","authors":"Nagisa Mayama, S. Mayama","doi":"10.1080/0269249X.2021.1986137","DOIUrl":"https://doi.org/10.1080/0269249X.2021.1986137","url":null,"abstract":"The surface structures of diatom valves have been primarily studied using scanning electron microscopy (SEM), while the frustule shape and internal cellular structures have been elucidated in cross-sections by transmission electron microscopy (TEM). However, ultrathin sections can show neither the part of the whole frustule that is cut nor reflect the relationship between the sectioned portion and the surrounding structure. Therefore, we developed a simple method for obtaining a clean cleavage surface of the frustule. In this method, a drop of diatom suspension was frozen on a custom-made bundle of metal joints pre-soaked in liquid nitrogen, followed by sample preparation for SEM. The three-dimensional (3D) structure of the entire frustule and cross-sectional features, such as the thickness of the valve and bands, the angle of projection, and the internal structures of the areolae, raphe systems, and isolated pores, were visible within each half of the cleaved frustule. Applying this method shortly after cell division revealed differences in the silica deposition profiles between parental and newly forming valves at the corresponding sites. The utility of the information obtained from the cleaved frustule is discussed.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47461761","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

Cyclotella (Bacillariophyceae) species present in sediments dating to Marine Isotope Stage 5 from Lake Chalco, central Mexico, with special reference to two new species: Cyclotella poyeka and Cyclotella tlalocii 存在于墨西哥中部查尔科湖海洋同位素第5阶段沉积物中的Cyclotella（Bacillarophyceae）物种，特别涉及两个新物种：太平洋Cyclotella poyeka和大西洋Cyclotella tlalocii

IF 1.8 3区生物学

Diatom Research Pub Date : 2021-10-02 DOI: 10.1080/0269249X.2021.2010808

D. Avendaño, M. Caballero

{"title":"Cyclotella (Bacillariophyceae) species present in sediments dating to Marine Isotope Stage 5 from Lake Chalco, central Mexico, with special reference to two new species: Cyclotella poyeka and Cyclotella tlalocii","authors":"D. Avendaño, M. Caballero","doi":"10.1080/0269249X.2021.2010808","DOIUrl":"https://doi.org/10.1080/0269249X.2021.2010808","url":null,"abstract":"Lake Chalco is one of the few lakes in Mexico that has a long, continuous sedimentary sequence covering the Upper Pleistocene (> 150 000 yrs). The diatom content of its lacustrine sediments includes a variety of centric species. In particular, the sediments dating to Marine Isotope Stage 5 (MIS5) were alternately dominated by four Cyclotella spp: C. meneghiniana Kützing, C. quillensis Bailey, and two new species which are described here: C. poyeka and C. tlalocii. These two new Cyclotella spp. resemble C. stylorum Brightwell, because of the presence of marginal chambers. Nevertheless, the new species from Lake Chalco have a different structure of the marginal chambers and marginal fultoportulae with three satellite pores. Cyclotella poyeka and C. tlalocii differ from each other by the relative proportion of the central area to valve face diameter, the central fultoportula arrangement, and the striation pattern. Ecological affinities of the four Cyclotella species in the MIS5 sediments from Lake Chalco are discussed based on their modern distribution (for C. meneghiniana and C. quillensis) and their fossil assemblages (for C. quillensis, C. tlalocii and C. poyeka), leading to the conclusion that C. tlalocii was a freshwater species while C. meneghiniana, C. quillensis, and C. poyeka thrived in saline conditions.","PeriodicalId":11199,"journal":{"name":"Diatom Research","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43168584","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

Studies on type material from Kützing’s diatom collection V – two new synonyms of Ulnaria vitrea (Kützing) E. Reichardt: Synedra mesocampa Brébisson in Kützing and Synedra tenuis Kützing k<s:1> tzing硅藻标本类型材料的研究——玻璃藻(k<s:1> tzing)的两个新同名:Synedra mesocampa br<s:1> bisson in k<s:1> tzing和Synedra tenuis k<s:1> tzing

IF 1.8 3区生物学

Diatom Research Pub Date : 2021-10-02 DOI: 10.1080/0269249X.2021.2020907

David M. Williams, B. Van de Vijver

引用次数: 0

New and interesting diatoms from the Shimen Wetwalls, Yunnan Province, China. I. Valve morphology of Melosira radiato-sinuata var. yunnanica Chen (Bacillariophyta: Melosirales) from Yunnan Province, China, with comments on its systematic position 云南石门湿地新发现的有趣硅藻。1 .云南放射-sinuata var. yunnanica Chen的瓣形态(硅藻门:melosiroales)及其系统地位的评析

IF 1.8 3区生物学

Diatom Research Pub Date : 2021-10-02 DOI: 10.1080/0269249X.2021.2025151

J. Kociolek, Q. Liu, A. Danz

引用次数: 2