干旱区生态环境知识资源中心(Arid): Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile

Arid

DOI	10.1016/j.ejop.2021.125798
	Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile
	Schiwitza, Sabine; Gutsche, Lennart; Freches, Eric; Arndt, Hartmut; Nitsche, Frank
通讯作者	Nitsche, F (corresponding author), Univ Cologne, Cologne Bioctr, Inst Zool, Gen Ecol, Zuelpicher Str 47b, D-50674 Cologne, Germany.
来源期刊	EUROPEAN JOURNAL OF PROTISTOLOGY
ISSN	0932-4739
EISSN	1618-0429
出版年	2021
卷号	79
英文摘要	In contrast to previous perspectives, hypersaline environments have been proven to harbour a variety of potentially highly adapted microorganisms, in particular unicellular eukaryotes. The isolated, hypersaline waterbodies in the Atacama Desert, Northern Chile are exposed to high UV radiation and deposition of toxic heavy metals, making them of great interest regarding studies on speciation and evolutionary processes. In the past two years, among a variety of other protist species, five new species of heterotrophic choanoflagellates were described and analysed from this area, showing an adaptation to a broad range of salinities. Morphological data alone does not allow for species delineation within craspedid species, additional molecular data is essential for modern taxonomy. In addition, molecular clock analyses pointed towards a strong selection force of the extreme environmental conditions. Within this study, we describe three additional craspedid choanoflagellate species, isolated from different aquatic environments. Phylogenetic analyses show two distinct clades of choanoflagellates from the Atacama, suggesting two independent invasions of at least two ancestral marine species, and, as indicated by our new data, a possible dispersal by Andean aquifers. The extended molecular clock analysis based on transcriptomic data of choanoflagellate strains from the Salar de Llamara, a hypersaline basin within the Central Depression of the Atacama Desert, reflects colonisation and divergence events which correspond to geological data of the paleohydrology. (C) 2021 Elsevier GmbH. All rights reserved.
英文关键词	Atacama Desert Choanoflagellatea Craspedida Divergence estimates Molecular clock Speciation processes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000663144800015
WOS关键词	DIVERSITY ; RNA ; PHYLOGENY ; LAKE ; SEDIMENTS ; PROTISTS ; NOVELTY ; LLAMARA ; MARINE ; RECORD
WOS类目	Microbiology
WOS研究方向	Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350197
作者单位	[Schiwitza, Sabine; Gutsche, Lennart; Freches, Eric; Arndt, Hartmut; Nitsche, Frank] Univ Cologne, Cologne Bioctr, Inst Zool, Gen Ecol, Zuelpicher Str 47b, D-50674 Cologne, Germany
推荐引用方式 GB/T 7714	Schiwitza, Sabine,Gutsche, Lennart,Freches, Eric,et al. Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile[J],2021,79.
APA	Schiwitza, Sabine,Gutsche, Lennart,Freches, Eric,Arndt, Hartmut,&Nitsche, Frank.(2021).Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile.EUROPEAN JOURNAL OF PROTISTOLOGY,79.
MLA	Schiwitza, Sabine,et al."Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile".EUROPEAN JOURNAL OF PROTISTOLOGY 79(2021).