High diversity and isolated distribution of aquatic heterotrophic protists in salars of the Atacama Desert at different salinities

IF 1.9 2区生物学 Q4 MICROBIOLOGY

European journal of protistology Pub Date : 2023-06-01 DOI:10.1016/j.ejop.2023.125987

Alexandra E. Lennartz (née Rybarski) , Frank Nitsche , Alexandra Schoenle , Claudia Voigt , Michael Staubwasser , Hartmut Arndt

{"title":"High diversity and isolated distribution of aquatic heterotrophic protists in salars of the Atacama Desert at different salinities","authors":"Alexandra E. Lennartz (née Rybarski) , Frank Nitsche , Alexandra Schoenle , Claudia Voigt , Michael Staubwasser , Hartmut Arndt","doi":"10.1016/j.ejop.2023.125987","DOIUrl":null,"url":null,"abstract":"<div><p>The species richness of eukaryotes in the hypersaline environment is generally thought to be low. However, recent studies showed a high degree of phylogenetic novelty at these extreme conditions with variable chemical parameters. These findings call for a more thorough look into the species richness of hypersaline environments. In this study, various hypersaline lakes (salars, 1–348 PSU) as well as further aquatic ecosystems of northern Chile were investigated regarding diversity of heterotrophic protists by metabarcoding studies of surface water samples. Investigations of genotypes of 18S rRNA genes showed a unique community composition in nearly each salar and even among different microhabitats within one salar. The genotype distribution showed no clear connection to the composition of main ions at the sampling sites, but protist communities from similar salinity ranges (either hypersaline, hyposaline or mesosaline) clustered together regarding their OTU composition. Salars appeared to be fairly isolated systems with only little exchange of protist communities where evolutionary lineages could separately evolve.</p></div>","PeriodicalId":12042,"journal":{"name":"European journal of protistology","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European journal of protistology","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0932473923000329","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: 3

Abstract

The species richness of eukaryotes in the hypersaline environment is generally thought to be low. However, recent studies showed a high degree of phylogenetic novelty at these extreme conditions with variable chemical parameters. These findings call for a more thorough look into the species richness of hypersaline environments. In this study, various hypersaline lakes (salars, 1–348 PSU) as well as further aquatic ecosystems of northern Chile were investigated regarding diversity of heterotrophic protists by metabarcoding studies of surface water samples. Investigations of genotypes of 18S rRNA genes showed a unique community composition in nearly each salar and even among different microhabitats within one salar. The genotype distribution showed no clear connection to the composition of main ions at the sampling sites, but protist communities from similar salinity ranges (either hypersaline, hyposaline or mesosaline) clustered together regarding their OTU composition. Salars appeared to be fairly isolated systems with only little exchange of protist communities where evolutionary lineages could separately evolve.

查看原文本刊更多论文

阿塔卡马沙漠不同盐度萨拉尔水生异养原生生物的高度多样性和孤立分布

在高盐环境中，真核生物的物种丰富度通常被认为较低。然而，最近的研究表明，在这些化学参数可变的极端条件下，系统发育具有高度的新颖性。这些发现要求对高盐环境的物种丰富度进行更彻底的研究。在本研究中，通过对地表水样本的代谢条形码研究，对智利北部的各种高盐度湖泊（Salas，1-348 PSU）以及其他水生生态系统的异养原生生物多样性进行了调查。对18S rRNA基因型的研究表明，几乎每种萨拉尔都有独特的群落组成，甚至在一种萨拉尔的不同微生境中也是如此。基因型分布与采样点的主要离子组成没有明确的联系，但来自相似盐度范围（高盐度、低盐度或中盐度）的原生生物群落在OTU组成方面聚集在一起。撒拉族似乎是一个相当孤立的系统，只有很少的原生生物群落交换，进化谱系可以单独进化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

European journal of protistology 生物-微生物学

CiteScore

4.60

自引率

20.70%

发文量

审稿时长

14.6 weeks

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.