Why do mesophotic coral ecosystems have to be protected?

Area of Science:

• Marine Biology
• Conservation Science
• Oceanography

Background:

• Mesophotic coral ecosystems (MCEs; 30-150m depth) are highly diverse yet under-protected marine environments.
• Limited discussion exists regarding the conservation needs of these unique deep-water habitats.

Purpose of the Study:

• To identify key features of MCEs that justify their classification as a global conservation priority.
• To advocate for enhanced protection and policy integration for MCEs.

Main Methods:

• Review and synthesis of existing scientific literature on MCE characteristics.
• Assessment of MCE features against established conservation criteria (e.g., Ecologically and Biologically Significant Areas).

Main Results:

• MCEs exhibit unique seascapes, specialized species, and high vulnerability to anthropogenic impacts.
• These ecosystems offer refuge, provide essential services, and support biodiversity, including threatened fishery resources.
• Many MCEs do not meet current protection standards and are inadequately considered in marine spatial planning.

Conclusions:

• MCEs possess characteristics that qualify them as Ecologically and Biologically Significant Marine Areas.
• Urgent policy interventions at national and international levels are required to establish MCEs as a global conservation priority.
• Effective conservation necessitates integrating MCE protection into fishery regulations, marine protected areas, and spatial planning.