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CRYOsphere-Ocean: Effect on the MIcrobial Communities in the Southern Ocean

Project description

Understanding the cryosphere’s impact on the Southern Ocean marine ecosystem

The melting cryosphere is a visible consequence of climate change and serves as a large source of freshwater for the Southern Ocean. The projected increase in iron and nutrient inflow to the surface waters of the Southern Ocean may have implications for primary production and carbon export. However, the impact on the marine ecosystem remains uncertain. Funded by the Marie Skłodowska-Curie Actions programme, the CRYOMICS project aims to investigate how nutrients, trace metals, and carbon released by the cryosphere influence phytoplankton and sea ice algae communities in the King Håkon VII Sea within the Eastern Weddell Gyre. Through intensive sampling, biogeochemical analyses, and metagenomics, the project will explore the structure and function of microbiomes in marine ecosystems associated with the cryosphere.

Objective

The melting of the cryosphere is among the most conspicuous consequences of climate change, and a significant source of freshwater to the Southern Ocean (SO). As a crucial sink for atmospheric carbon dioxide (CO2), anticipated physical changes in the Southern Ocean will bring modifications to its biogeochemical processes and role in the Earth climate. Predicted increases in iron and nutrient influx to the SO surface waters are likely to impact its primary production and contribution to biological carbon export. However, there remains uncertainty about the significance and magnitude of these projections on primary producers, with likely consequences on the rest of the marine ecosystem. CRYOMICS aims to characterise and quantify the fate of cryospheric exported bioavailable nutrients, trace metals and carbon on phytoplankton utilisation pathways with broader implication on the functioning of the biological carbon pump in the KHS. We hypothesise that biogeochemical enrichment from melting ice shelves leads to a direct positive response of the phytoplankton and sea ice algae community, enhancing its productivity and metabolic functions while favouring larger-celled species such as diatoms. Focusing primarily on the understudied Kong Håkon VII Sea (KHS) in the Eastern Weddell Gyre, along a unique cryosphere-ocean continuum, CRYOMICS combines intensive sampling, biogeochemical analyses and metagenomics to systematically understand the structure and function of microbiomes in marine ecosystems associated with the cryosphere and amidst contemporary changes. Through the support of the MSCA, this project will provide a coordinated and comprehensive dataset of this region of the Southern Ocean, shedding light on microbial interactions and their potential vulnerabilities to perturbations, a dimension currently lacking in climate models. This invaluable insight will enhance our understanding of future projections for the Southern Ocean, including its impact on Antarctic Sea ice.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2023-PF-01

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Coordinator

NORSK POLARINSTITUTT
Net EU contribution
€ 210 911,04
Address
HJALMAR JOHANNESENS 14
9296 Tromsoe
Norway
Activity type
Research Organisations
Links
Total cost
No data