Q 60 - What is the impact of CC on deep ecosystems?#

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Operational approaches

ESE1 - Ecological toolkit#

Practices: Scoping Implementation and management
Spatial scales: Transboundary / sea basin National Regional / local
Protection regimes: Strict protection Non-strict protection
Marine zones: Deep sea

Criteria classes: 1.1.1 Vulnerability 1.1.2 Stability 1.1.3 Functional hotspots

Criteria

Operational approaches: (Method) Climate change impact assessment

Implementation details

The incidence of CC on deep-ecosystem is complex but the concerns are mainly related to habitats destruction and functional loss (Functionality - Functional hotspots) as deep-ecosystems are productive areas for lots of fisheries and for ecological functional such as carbon storage. The incidence of CC on deep-ecosystem is still mainly unknown as the only biological indicator considered is mortality. There is a great need to develop dedicated indicators at different depths as the incidence of CC could vary according to local conditions, as well as the need to develop further lab experiments to identify survival and stress thresholds for deep-sea species, such as their inner Potential for adaptation (Climate-smart potential). Moreover, the analysis of 3D waters is crucially important as there is an increasing recognition of the deep-sea waters for potential climate-refugees. The monitoring phase holds a key importance as well.

Performing a risk assessment for deep-sea species could provide a proxy of present and future exposure of deep ecosystems to CC, especially as physical parameters become increasingly available. To do so, follow the step-by-step MSP4BIO CC-related guidance searching for climate stable areas (Climatic stability, refuge areas) and analysing the Time of Emergence of each stressors. Protecting stable and connected areas (larval source and spawning areas) could be a key lever toward deep-sea species protection.

Notes

Cambra et al (2024). Guidance for including climate change scenarios in protection and prioritization strategies for Marine Protected Areas development. Deliverable D3.3, under the WP3 of MSP4BIO project (GA n° 101060707)