Final answer:
The construction of the Volgograd Dam disrupted sturgeon migration and had negative impacts on various animal species.
Step-by-step explanation:
The event that disrupted sturgeon migration due to the damming of the Volga river was the Construction of the Volgograd Dam.
The dam restricts the flushing of water pollution and creates a potential for landslides, which affects the habitat of the sturgeon.
This event has had a negative impact on various animal species, including the critically endangered Siberian Cranes and the Yangtze River Dolphin.