Question

the video lists several invasive bivalve species in the united states. which problem is specifically mentioned as a consequence of these invasions? they cause coastal erosion by burrowing into sand they outcompete native species and sometimes encrust their corpses they produce toxins that kill all aquatic plants they increase the salinity of freshwater lakes

Explanation:

To solve this, we analyze each option:

• Coastal erosion by burrowing in sand is not a typical consequence of invasive bivalves.
• Invasive bivalves often outcompete native species for resources, and encrusting corpses can be a behavior (e.g., zebra mussels outcompete natives and can attach to surfaces including remains).
• Producing toxins to kill all aquatic plants is not a common trait of invasive bivalves.
• Increasing salinity of freshwater lakes is not related to bivalve invasions.

Answer:

B. They outcompete native species and sometimes encrust their corpses