Quantification of mass mortality event in freshwater mollusks within the Lower Odra, a large European river, data

• In the summer of 2022, an ecological disaster occurred on the River Odra in Europe, caused by Golden Algae toxins, resulting in an unprecedented mass mortality of fish, bivalves, and water snails.
• The disaster led to an estimated 66 million dead individuals, with the Unionidae population declining by 87%, and the native Anodonta anatina species particularly affected with a 95% decrease.
• The invasive Sinanodonta woodiana species suffered the least damage, highlighting the potential for an invasive species to take over the ecological niche left by the native mussels.
• The disaster resulted in a minimum of 144 million dead water snails washed ashore.
• Further research is needed to determine the adaptive capacity of the river's ecosystem and its potential for recovery.

• 2022年夏季，欧洲奥得河（River Odra）爆发由金藻毒素（Golden Algae toxins）引发的生态灾难，造成鱼类、双壳类及淡水螺出现前所未有的大规模死亡。
• 据估算，此次灾难共导致约6600万只水生生物死亡，其中蚌科（Unionidae）种群数量下降87%；本土物种背角无齿蚌（Anodonta anatina）受影响尤为严重，种群数量锐减95%。
• 入侵物种池蝶蚌（Sinanodonta woodiana）受损害程度最轻，这凸显出入侵物种有潜力占据本土蚌类遗留的生态位。
• 此次灾难至少造成1.44亿只淡水螺被冲至岸滩死亡。
• 目前仍需开展进一步研究，以明确该河流生态系统的适应能力及其生态恢复潜力。