The Basque Coast Estuarine Sediment Gene Catalogue

Area of Science:

• Estuarine ecology
• Microbial ecology
• Metagenomics

Background:

• Estuaries link marine, riverine, and terrestrial ecosystems, acting as biodiversity hotspots.
• They perform crucial functions like nutrient cycling and pollutant removal.
• Knowledge gaps exist regarding estuarine ecological functioning and anthropogenic impacts.

Purpose of the Study:

• To investigate the ecological functioning and biodiversity of intertidal estuarine benthos.
• To address the knowledge gap on how these habitats are impacted by human pressures.
• To reconstruct microbial genomes and genes from estuarine environments.

Main Methods:

• Retrieval of 92 microbial metagenomic assemblies from estuarine benthos.
• Reconstruction of 390 medium and 81 high-quality Metagenome-Assembled Genomes (MAGs).
• Analysis of 108 million putative genes from bacteria, archaea, eukaryotes, and viruses.

Main Results:

• A comprehensive dataset of MAGs and genes from estuarine microbial communities was generated.
• The study provides a foundation for understanding estuarine ecosystem functioning.
• Insights into biogeochemical processes and the contribution of unculturable biomass were gained.

Conclusions:

• The generated dataset significantly enhances understanding of estuarine biodiversity and ecological functions.
• This research sheds light on the role of microbial communities, including uncultured ones, in estuarine environments.
• The findings are crucial for assessing and mitigating anthropogenic impacts on these vital ecosystems.