Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile
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| Title: | Main Title: Extended divergence estimates and species descriptions of new craspedid choanoflagellates from the Atacama Desert, Northern Chile |
| Description: | Abstract: 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 regard- ing 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 Llamará, a hypersaline basin within the Central Depression of the Atacama Desert, reflects colonisation and divergence events which correspond to geological data of the paleohydrology. |
Responsible Party
| Creators: | Frank Nitsche (Author), Sabine Schiwitza (Author), Hartmut Arndt (Principal Investigator) |
| Publisher: | Elsevier |
| Publication Year: | 2021 |
Topic
| CRC1211 Topic: | Biology |
| Related Subproject: | B2 |
| Subjects: | Keywords: Biodiversity, Molecular Biology |
| Geogr. Information Topic: | Biota |
File Details
| Filename: | Schiwitza_et_al_2021_Europ_J_Protistol.pdf |
| Data Type: | Data Paper - Biodiversity |
| File Size: | 1.1 MB |
| Date: | Accepted: 23.04.2021 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Free |
| General Access and Use Conditions: | According to the CRC1211DB data policy agreement. |
| Access Limitations: | According to the CRC1211DB data policy agreement. |
| Licence: | [CRC1211DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | In Print |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | European Journal of Protistology |
| Volume: | 79 |
| Number of Pages: | 11 (1 - 11) |
Metadata Details
| Metadata Creator: | Frank Nitsche |
| Metadata Created: | 08.09.2023 |
| Metadata Last Updated: | 08.09.2023 |
| Subproject: | B2 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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