Anna Bessudova , Viktor Gabyshev , Yelena V. Likhoshway
{"title":"Silica-scaled heterotrophic protists: Rotosphaerida, Thaumatomonadida and Centroplasthelida in Arctic waters of Russia","authors":"Anna Bessudova , Viktor Gabyshev , Yelena V. Likhoshway","doi":"10.1016/j.ejop.2023.125975","DOIUrl":null,"url":null,"abstract":"<div><p><span>Maintaining high levels of biological diversity in various ecosystems is necessary for stable functioning of the Earth's biosphere. The article describes diversity and ecology of heterotrophic siliceous protists<span> – rotosphaerids, colourless free-living thaumatomonad flagellates, and centrohelid heliozoans – in Arctic waters located of Asian Russia. Samples were collected in the mouths of the Olenyok, Yana, Indigirka, Kolyma Rivers – and small freshwater ponds near Settlement of Tiksi in Yakutia. Based on electron microscopy, 35 centrohelids (Heliozoa), 11 rotosphaerid species as well as four thaumatomonad flagellate species were found in the region. Seven species were recorded in Russia for the first time: </span></span><em>Rabdiaster multicosta</em>, <em>Rabdiaster reticulata</em>, <em>Turriplaca denticulata</em>, <em>Choanocystis</em> cf. <em>cordiformis parvula</em>, <em>Raineriophrys pteromorphos</em>, <em>Pseudoraphidocystis glutinosa</em> and <em>Pseudoraphidiophrys formosa.</em> For 43 species, the study area is the most northern location they were described. Morphological details of scales are discussed for selected species, particularly for widespread species of rotosphaerids – <em>Pinaciophora fluviatilis.</em> The literature on hydrochemical conditions was analyzed to find taxa with high sensitivity towards environmental changes. Such species could be further used for monitoring plankton, recovering evolutionary changes, and reconstructing past environments.</p></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":"90 ","pages":"Article 125975"},"PeriodicalIF":1.9000,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European journal of protistology","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0932473923000202","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Maintaining high levels of biological diversity in various ecosystems is necessary for stable functioning of the Earth's biosphere. The article describes diversity and ecology of heterotrophic siliceous protists – rotosphaerids, colourless free-living thaumatomonad flagellates, and centrohelid heliozoans – in Arctic waters located of Asian Russia. Samples were collected in the mouths of the Olenyok, Yana, Indigirka, Kolyma Rivers – and small freshwater ponds near Settlement of Tiksi in Yakutia. Based on electron microscopy, 35 centrohelids (Heliozoa), 11 rotosphaerid species as well as four thaumatomonad flagellate species were found in the region. Seven species were recorded in Russia for the first time: Rabdiaster multicosta, Rabdiaster reticulata, Turriplaca denticulata, Choanocystis cf. cordiformis parvula, Raineriophrys pteromorphos, Pseudoraphidocystis glutinosa and Pseudoraphidiophrys formosa. For 43 species, the study area is the most northern location they were described. Morphological details of scales are discussed for selected species, particularly for widespread species of rotosphaerids – Pinaciophora fluviatilis. The literature on hydrochemical conditions was analyzed to find taxa with high sensitivity towards environmental changes. Such species could be further used for monitoring plankton, recovering evolutionary changes, and reconstructing past environments.
期刊介绍:
Articles deal with protists, unicellular organisms encountered free-living in various habitats or as parasites or used in basic research or applications. The European Journal of Protistology covers topics such as the structure and systematics of protists, their development, ecology, molecular biology and physiology. Beside publishing original articles the journal offers a forum for announcing scientific meetings. Reviews of recently published books are included as well. With its diversity of topics, the European Journal of Protistology is an essential source of information for every active protistologist and for biologists of various fields.