Reference : UAR3278-NATTOL-009
Workplace : PERPIGNAN
Date of publication : Friday, November 18, 2022
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 February 2023
Proportion of work : Full time
Remuneration : between €2,800 and €4,000 gross per month depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years
Given the actual transformation of coral reefs, increased turbidity in the coastal ecosystem resulting from deforestation and coral bleaching due to increased ocean and coral water temperatures are the most striking stressors and drivers of actual coral reef transformations.
The project will build on the Tara Pacific programme by analysing Tara Pacific data in relation to the two stressors mentioned above, adding sampling in the Indian Ocean and Caribbean and undertaking controlled in situ analysis in relation to turbidity and coral bleaching.
These tasks will be undertaken on the basis of the metagenomic and metatranscriptomic approaches already developed in the Tara Pacific analysis to ensure continuity and parallelism in the analysis
- Metagenomic and metatranscriptomic analysis of coral holobionts from Tara Pacific sampling in the context of the historical coral bleaching event by recovering the bleaching event around each sampling area
- Metagenomic and metatranscriptomic analysis of coral holobionts from Tara Pacific sampling in the context of turbidity which will be correlated to the island landmass near the sampling areas
- Sample collections Indian Ocean and Caribbean
- In situ experimental turbidity stress and collection of coral colonies for metagenomic and metatranscriptomic analysis
- In situ experimental bleaching stress and collection of coral colonies for metagenomic and metatranscriptomic analysis
- Analysis of metagenomic and metatranscriptomic data from coral holobionts
- Development of metagenomic and metatranscriptomic pipelines to describe the assembly of data on the diversity of protists, viruses and bacteria in the coral holobiont
- In situ and in vivo experiments to test experimentally
- Collections of coral and environmental waters
- Controlled turbidity analysis on the coral holobiont
- Controlled bleaching analysis on the coral holobiont
Although they cover only ~0.2% of the ocean's surface, coral reefs are home to ~30% of the oceans' biodiversity, providing ecological services (fisheries, tourism, coastal protection) to nearly a billion people and estimated at USD 30 billion per year. The 20th century saw the Earth enter what is now known as the Anthropocene. Anthropogenic changes are occurring at global and local scales, altering the physiology of organisms and ecosystems by changing the Earth's physical, chemical and biological processes. Among marine ecosystems, coral reefs have the unfortunate privilege of being highly sensitive to these environmental changes. In particular, the thermal process of coral bleaching, i.e. the loss of obligatory photosynthetic microalgal endosymbionts, is increasingly decimating corals. Projections estimate that about 25% of reefs have already been lost and up to 99% will be threatened and radically transformed by 2050.
The Tara Pacific expedition lasted over two years (2016-2018), applying the latest technologies to map the "-omic" complexity of the coral holobiont within its ecosystem and across the Pacific Ocean. Considering that a holistic approach that integrates all components of the reef biota is unrealistic, the Tara Pacific expedition focuses its approach on widely distributed coral and fish holobionts and their contextual biological (plankton) and physico-chemical environment.
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