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Untangling eco-evolutionary impacts on diatom genomes over timescales relevant to current climate change

Project description

Forecasting the future of the oceans through the study of diatoms

Diatoms are one of the most significant groups of photosynthesising algae, contributing to primary production in the ocean and carbon dioxide removal over geologically relevant timescales. Understanding the eco-evolutionary underpinnings of their ecological success will help us forecast their fate in a future ocean impacted by anthropogenic change. The EU-funded DIATOMIC project is investigating how evolutionary and ecological processes combine to influence diatoms' adaptation to their environment at unprecedented spatiotemporal scales. By studying ancient diatom DNA from the sub-seafloor, the project aspires to reveal the genetic and epigenetic bases of speciation and adaptation that have marked the ecological success of diatoms over the last 100 000 years.

Objective

Diatoms are major contributors of primary production in the ocean and participate in carbon sequestration over geologically relevant timescales. As key components of the Earth’s carbon cycle and marine food webs we need to understand the eco-evolutionary underpinnings of their ecological success to forecast their fate in a future ocean impacted by anthropogenic change. Genomes and epigenomes from model diatoms, as well as hundreds of transcriptomes from multiple species, have revealed genetic and epigenetic processes regulating gene expression in response to changing environments. The Tara Oceans survey has in parallel generated resources to explore diatom abundance, diversity and gene expression in the world’s ocean in widely contrasting conditions. DIATOMIC will build on these resources to understand how evolutionary and ecological processes combine to influence diatom adaptations to their environment at unprecedented spatiotemporal scales. To examine these processes over timescales relevant to current climate change, DIATOMIC includes the pioneering exploration of ancient diatom DNA from the sub-seafloor to reveal the genetic and epigenetic bases of speciation and adaptation that have impacted their ecological success during the last 100,000 years, when Earth experienced major climatological events and an increase in anthropogenic impacts. As a model for exploring eco-evolutionary processes in the past and contemporary ocean we will focus primarily on Chaetoceros because this diatom genus is ancient, ubiquitous, abundant and contributes significantly to carbon export. Key findings will be additionally supported by lab-based studies using the diatom Phaeodactylum for which exemplar molecular tools exist. Specifically, the project will address:
1. What molecular features characterize genome evolution in diatoms?
2. Which processes determine diatom metapopulation structure?
3. What can ancient DNA tell us about diatom adaptations to environmental change in the past?

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

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ERC-ADG - Advanced Grant

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Call for proposal

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(opens in new window) ERC-2018-ADG

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Host institution

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 2 423 753,00
Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 2 495 753,00

Beneficiaries (2)

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