| Autor: |
Dede, Bledina, Priest, Taylor, Bach, Wolfgang, Walter, Maren, Amann, Rudolf, Meyerdierks, Anke |
| Zdroj: |
The ISME Journal; April 2023, Vol. 17 Issue: 4 p600-610, 11p |
| Abstrakt: |
Species within the genus Alcanivoraxare well known hydrocarbon-degraders that propagate quickly in oil spills and natural oil seepage. They are also inhabitants of the deep-sea and have been found in several hydrothermal plumes. However, an in-depth analysis of deep-sea Alcanivoraxis currently lacking. In this study, we used multiple culture-independent techniques to analyze the microbial community composition of hydrothermal plumes in the Northern Tonga arc and Northeastern Lau Basin focusing on the autecology of Alcanivorax. The hydrothermal vents feeding the plumes are hosted in an arc volcano (Niua), a rear-arc caldera (Niuatahi) and the Northeast Lau Spreading Centre (Maka). Fluorescence in situ hybridization revealed that Alcanivoraxdominated the community at two sites (1210–1565 mbsl), reaching up to 48% relative abundance (3.5?×?104cells/ml). Through 16S rRNA gene and metagenome analyses, we identified that this pattern was driven by two Alcanivoraxspecies in the plumes of Niuatahi and Maka. Despite no indication for hydrocarbon presence in the plumes of these areas, a high expression of genes involved in hydrocarbon-degradation was observed. We hypothesize that the high abundance and gene expression of Alcanivoraxis likely due to yet undiscovered hydrocarbon seepage from the seafloor, potentially resulting from recent volcanic activity in the area. Chain-length and complexity of hydrocarbons, and water depth could be driving niche partitioning in Alcanivorax. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink