Posidonia Habitat Mapping: Hydra
THE CHALLENGE
Hydra and Spetses are among the most visited destinations in the Argosaronic, with intense recreational boating, marine taxis and seasonal anchoring placing significant pressure on seabed habitats.
While Posidonia meadows are protected under European legislation, no accurate, high-resolution spatial data existed for Hydra. Without clear habitat maps, effective anchoring management, enforcement and public awareness efforts were limited.
At the same time, scientific findings from a previous mapping held around Spetses required translation into accessible knowledge for local communities.
THE PROJECT
AEF supported iSea to implement an integrated, science-based approach aimed at strengthening the long-term protection and sustainable management of Posidonia seagrass meadows in the Argosaronic region. By combining advanced mapping methodologies with field validation, the initiative established a reliable environmental baseline to inform conservation planning and decision-making. In parallel, the approach embedded community awareness and stakeholder engagement, ensuring that scientific outputs were accessible, locally relevant, and able to support policy development, marine spatial planning, and responsible marine practices.
OUTCOMES
The project was completed according to plan, successfully delivering detailed Posidonia maps for both Hydra and Spetses.
Impact at a Glance
- High-resolution Posidonia distribution map completed for Hydra
- Scientific baseline created to inform anchoring regulation and local marine planning
- Awareness materials installed and disseminated in Spetses
- 500+ residents and visitors directly reached
- 7,000+ online interactions amplifying Posidonia protection messages
This phase bridged science and society ensuring that mapping outputs translated into local ownership, informed decision-making and practical conservation dialogue.
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