One Ocean Science Congress 2025

Learn more about our engagement in the 2025 One Ocean Science Congress
Atlantic Ocean wide
  • to

    Nice, France

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The One Ocean Science Congress (OOSC) is a Special Event held in support of the 2025 UN Ocean Conference (UNOC). Organised by CNRS and IFREMER, it served as the scientific foundation for UNOC in order to generate science-based outcomes and recommendations to support global discussions.
University of Plymouth researchers, along with colleagues from the Marine Research Plymouth Alliance, delivered the latest evidence in specialist areas such as marine biodiversity, offshore renewable energy, plankton dynamics and pelagic ecosystem services.
Professor Deborah Greaves OBE FREng is an International Science Committee and organising member of OOSC. The Committee drafted recommendations for policy makers at UNOC Ocean Action Panels.

Congress participants sign manifesto

The organisers and the International Scientific Committee of the One Ocean Science Congress invited congress participants to endorse the Science for Ocean Action manifesto.
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Our contribution

  • Session T2-3: Ocean-based renewable energy such as offshore wind, solar, wave, thermal and tidal energy, Tuesday 3 June, 14:00–15:00 (EST), Room 5
In response to the urgency of combating climate change, there is a growing interest in exploring ocean-based carbon dioxide removal strategies and alternative renewable energy sources, as well as adaptation and resilience-building interventions for natural and human systems. However, the potential benefits, side-effects and risks associated with these strategies and options remain largely unknown, both for marine ecosystems and for society at large.
  • Session T9-1, Environmental footprint of maritime transport and decarbonization of shipping, Thursday 5 June, 16:00–17:30 (EST), Room 6
Fostering a comprehensive approach to shipping to address the triple planetary crises of climate change, pollution and biodiversity loss will be essential. In addition to decarbonisation, what more can be done to assess, reduce and avoid negative impacts on marine biodiversity in ports and globally?
Speaker: Dr Matthew Holland
Harnessing plankton dynamics to drive management efforts in the face of rapid environmental change
Thursday 5 June, 14:00–14:10 (EST), Room 2, OOS2025-19, Orals, Session T2-2
Using methodology developed for the 2023 OSPAR assessment of Pelagic Habitats, we analysed 29 years of Continuous Plankton Recorder data from the North-East Atlantic to examine how temperature, nutrients and background environmental variability impacted abundance.
Speaker: Mr Matthew Faith
Modelling the pelagic ecosystem service losses from climate-driven declines in phytoplankton
Thursday 5 June, 16:40–16:50 (EST), Room 2, OOS2025-583, Orals, Session T2-2
We project changes to two vital pelagic ecosystem services, carbon export and fisheries, with future plankton ecological changes. We coupled an empirical approach based on pelagic size structure (the relative biomass of large and small organisms), coupled to projections from two Earth System Models to estimate changes in the supportable biomass of fish and in carbon export efficiency under CMIP6 high emissions scenarios.
Poster: Dr Abigail McQuatters-Gollop et al.
Assessing the state of marine biodiversity in the Northeast Atlantic
Tuesday 3 June, 17:00 (EST); Thursday 5 Jun, 20:00 (EST), P238, OOS2025-15
As part of the 2023 OSPAR Quality Status Report, here, for the first time, we use a semi-quantitative approach to evaluate holistically the state of Northeast Atlantic marine biodiversity across marine food webs, from plankton to top predators, via fish, pelagic and benthic habitats, including xeno-biodiversity.

Supporting the 2025 UN Ocean Conference

The 2025 United Nations Ocean Conference aims to support the implementation of United Nations Sustainable Development Goal 14: Conserve and sustainably use the ocean, seas and marine resources for sustainable development.
Held in Nice, France between 9–13 June 2025, University of Plymouth researchers, along with colleagues from the Marine Research Plymouth Alliance, participated to enable evidence-based decision-making to protect ocean health and sustainability. Critical areas include plastic pollution, including evidence to inform the Global Plastics Treaty, and offshore renewable energy.
Both over and under the water, Coastline of the Caribbean, Basse Terre, Guadeloupe, French Caribbean. getty 1124263285

Event photography and video

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