The site has suffered changes in ecological character due to water management projects and increasing nutrient-enrichment. For these reasons it was placed on the Montreux Record in 1990. Ramsar site no. 58. Axios, Loudias, Aliakmon delta . An extensive river delta including brackish lagoons, saltmarshes, and large areas of mudflats.
Vegetation consists of scrub, riparian forest, wet meadows, reedbeds, and halophytic communities.
30 freshwater fish species occur in the river. An extremely important area for nesting and migrating waterbirds. Various species of wild birds and Scolopacidae worthy of conservation or globally threatened occur at the site. Human activities include fishing, shellfish aquaculture, agriculture, livestock grazing, and sand extraction. Because dam and irrigation networks considerably altered river hydraulics and urban wastes and agricultural inputs end up in the delta, the site was placed on the Montreux Record in 1990.