Mrtvé rameno Berounky

Slipping through time, imagine the Berounka River surging with untamed energy. The Mrtvé rameno Berounky whispers tales of this powerful past. This oxbow lake, nestled near the Zbraslav Chateau in Prague, reflects a history shaped by the river’s capricious nature. Mrtvé rameno Berounky, meaning “Dead Arm of the Berounka,” speaks to its separation from the main flow. Before the mid-19th century, this serene lake was part of the Berounka’s main channel. A dramatic flood in 1834 forced the river to carve a new path. The old route became a tranquil backwater, the Mrtvé rameno Berounky we see today. This shift left behind a unique environment. The lake became a haven for diverse ecosystems. Wetlands, meadows, and remnants of riparian forest flourish here, creating a mosaic of habitats rarely found within a city. This ecological richness draws a variety of species. The Mrtvé rameno Berounky hosts a surprising number of mollusks, including the rare Planorbis carinatus snail. Leeches and the freshwater shrimp Gammarus pulex also thrive in these waters. The surrounding area supports a vibrant insect population. Over 136 species of moths have been recorded here, among them the Ectoedemia hannoverella and the Poplar Hawk-moth. The area also boasts nearly 300 species of phytophagous beetles, representing about 20% of the total number found in the Czech Republic. A noteworthy resident is the Anthonomus undulatus weevil, found only in this location within the Czech Republic. While the Mrtvé rameno Berounky offers a peaceful escape, it faces ongoing challenges. A wastewater treatment plant, a remnant of a less environmentally conscious era, continues to impact the water quality and encourages the growth of nitrogen-loving plants. Efforts are underway to mitigate these effects and restore the ecological balance.