Investigations on the diversity of heterotrophic flagellates in the hypersaline lake Salar de Atacama (Chile)
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| Title: | Main Title: Investigations on the diversity of heterotrophic flagellates in the hypersaline lake Salar de Atacama (Chile) |
| Description: | Abstract: In this study, the diversity of heterotrophic flagellates in the hypersaline lake Salar de Atacama (Northern Chile) was investigated. It was possible to isolate two Heterolobosean and three Stramenopile strains, which appeared to be new species. 18S rRNA gene phylogenies confirm, that one of the Heterolobosean strains belongs to the clade of Tulamoeba and the other one to the clade of Pharyngomonas, which is the deepest branch of the Heterolobosea tree. Both of these two strains had a flagellated, amoeboid and cyst stadium. Strain HFCC1217, that clustered in the Tulamoeba clade, was spindle-shaped with two flagella. Strain HFCC1219 clustered in the deep-branching Pharyngomonas group and was also spindle-shaped, possessed four flagella and a prominent feeding groove, which is a characteristic of the Heterolobosea. The phylogenies also confirm, that two of the Stramenopile strains belong to the clade of Placidida and the other one to the clade of Halocafeteria. The two strains, that clustered in the Placidida (HFCC1221, HFCC1220), had round to ovoid cells with two flagella of almost equal length. The cells of strain HFCC1220, which clustered in the Halocafeteria clade, were ovoid and possessed flagella of unequal length. All strains were genetically and morphologically compared to close relatives, that were also isolated from other hypersaline waters spread around the world. The comparison shows, that the strains were morphologically and genetically different to their closest relatives. None of the strains was found anywhere else than in the Salar de Atacama yet. Phylogenies suggest geographic clustering of the halophilic protists, especially for the Heterolobosea, which appear to be obligate halophiles. Results also assume, that ancestors of the strains investigated in this study and their close relatives could have invaded high salinity environments independently of each other. This study provides information about extremely halophilic heterotrophic protists and suggests, that there is a lot more to uncover about these organisms by further investigations to understand the community composition of biota in habitats with extremely high salt contents. |
Responsible Party
| Creator: | Isabell Hammelbeck (Author) |
| Publisher: | CRC1211 Database (CRC1211DB) |
| Publication Year: | 2019 |
Topic
| CRC1211 Topic: | Biology |
| Related Subproject: | B3 |
| Subject: | Keyword: Biodiversity |
| Geogr. Information Topic: | Inland Waters |
File Details
| Filename: | Hammelbeck.pdf |
| Data Type: | Text - Text |
| File Size: | 629 KB |
| Date: | Available: 29.07.2016 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | According to the CRC1211DB data policy agreement. |
| Access Limitations: | According to the CRC1211DB data policy agreement. |
| Licence: | None |
Geographic
Specific Information - Report
| Report Date: | 29th of July, 2016 |
| Report Type: | Bachelor Thesis |
| Report City: | Cologne |
| Report Institution: | University of Cologne |
Metadata Details
| Metadata Creator: | Frank Nitsche |
| Metadata Created: | 25.10.2019 |
| Metadata Last Updated: | 25.10.2019 |
| Subproject: | B3 |
| Funding Phase: | 1 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 147 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 0 |
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