Marine Habitats

Iran's marine biodiversity is best approached as a mosaic of habitats. The University of Tehran research team's atlas project distinguishes southern coastal wetlands, muddy and sandy flats, mangroves, seagrasses, exposed sandy beaches, rocky and cobble shores, and coral ecosystems. Its coverage concerns the Persian Gulf and Gulf of Oman; it should not be mistaken for an inventory of the Caspian coast. s1

The atlas emphasizes smaller habitat differences within these broad categories. Shore structure and geographical location influence where organisms occur, so a coastline cannot be assessed simply by asking whether it contains coral or mangrove trees. Flats, creeks, beaches, and submerged habitats each deserve attention. s1

Between Qeshm Island and the mainland, the Khuran Strait contains a coastal landscape of mangroves, intertidal flats, creeks, and small islands. A nomination submitted to UNESCO identifies grey mangrove, Avicennia marina, locally called harra, as a characteristic tree. This is a submission on the World Heritage Tentative List, rather than evidence that the area has been inscribed as a World Heritage property. s2

Khuran also has a separately documented Ramsar designation: the Ramsar Sites Information Service records it as a Wetland of International Importance designated in 1975. That designation describes a conservation site, not an annual measurement of mangrove extent or proof that every part remains in good condition. s3

The nomination explains an important ecological connection: invertebrates living in the intertidal and mangrove zones provide food for waterbirds. The trees, surrounding sediment, and feeding areas belong to the same habitat story. Looking only at the visible tree canopy would miss part of what makes the landscape valuable. s2

On Iran's northern coast, Miankaleh illustrates the connection between coastal wetlands and aquatic biodiversity. UNESCO's reserve profile identifies fish spawning grounds, nursery areas, and migration paths alongside habitat for waterbirds. Coastal conservation here must therefore account for both aquatic and terrestrial components. s4

The Caspian seal adds a basin-wide perspective. The Marine Mammal Protected Areas Task Force explains that this landlocked species depends entirely on the Caspian environment and needs dry places, called haul-out sites, for resting and moulting. Its assessment draws on observations and tracking around the basin; the sites it discusses should not all be assumed to lie in Iran. s5

That assessment links abandonment of some haul-out sites to human disturbance, with sea-level changes also contributing in some locations. It demonstrates why habitat includes access to suitable shore as well as water in which an animal feeds and travels. s5

The southern atlas project combines literature, fieldwork, remote sensing, and geographical mapping. It also acknowledges uneven biological knowledge: crustaceans, molluscs, and polychaete worms are comparatively well documented, while credible published information for other groups is scarcer. A mapped habitat is therefore a starting point for investigation, rather than a complete account of its living communities. s1

For readers assessing conservation claims, three questions are useful: which habitat was measured, where were its boundaries, and when was its condition observed? The sources assembled here establish habitat diversity and specific ecological relationships. They do not provide a comparable annual national series showing how much healthy marine habitat Iran retains. s1s3s5

Two documented coastal habitat relationships

The arrows show habitat and feeding relationships described for Khuran and Miankaleh. These are separate examples, not a claim that their ecosystems or species communities are interchangeable.