Lake Mellah (Arabic: بحيرة الملاح, Buhayrat al-Mallāḥ) is a coastal lagoon located in northeastern Algeria, within the El Tarf Province. It is situated near the city of El Kala and forms an integral part of the El Kala National Park, a protected area recognized for its ecological significance.
Geography and Hydrology: Lake Mellah is a brackish water body, characterized by its varying salinity levels due to its intermittent connection with the Mediterranean Sea. A narrow channel, often referred to as the "Boughaz," connects the lake to the sea, allowing for the exchange of water, particularly during periods of high water levels or tidal influence. The lake is relatively shallow, with an average depth of around 2 meters, and covers an area of approximately 8.7 square kilometers. Its basin receives freshwater input from several small wadis (seasonal rivers) and springs, contributing to its unique hydrological regime.
Ecology and Biodiversity: Lake Mellah is renowned for its rich biodiversity and is recognized as a wetland of international importance. It was designated a Ramsar site in 1983, highlighting its critical role as a habitat for numerous species.
- Flora: The lake's margins and shallow areas support extensive beds of aquatic vegetation, including submerged macrophytes like Ruppia cirrhosa and Potamogeton pectinatus, as well as emergent reeds such as Phragmites australis and Typha latifolia. These plant communities provide vital food and shelter for aquatic fauna.
- Fauna: The lake is a significant breeding, feeding, and resting ground for a wide array of bird species, particularly migratory waterfowl. Notable avian species include the Greater Flamingo (Phoenicopterus roseus), Marbled Duck (Marmaronetta angustirostris), White-headed Duck (Oxyura leucocephala), and various species of ducks, gulls, and terns. The lake also supports a diverse ichthyofauna (fish population), including both marine species that enter from the sea (e.g., mullets, eels) and freshwater species adapted to brackish conditions. Other inhabitants include various invertebrates, amphibians, and reptiles.
Conservation Status and Significance: As a component of the El Kala National Park and a Ramsar site, Lake Mellah benefits from national and international protection efforts. It plays a crucial role in maintaining regional biodiversity and provides essential ecosystem services, including water purification, flood regulation, and support for local fisheries. The lake also holds cultural and socio-economic importance for local communities, who engage in traditional fishing and sometimes tourism activities around its shores. Threats to the lake's ecosystem include pollution from agricultural runoff, habitat degradation due to human activities, and the impacts of climate change on water levels and salinity. Ongoing conservation efforts aim to mitigate these threats and ensure the long-term ecological integrity of Lake Mellah.