Question

The graphs below show the changes in crab color at one beach. Which of the following is most likely to have caused the change in the distribution? 5 points Captionless Image A new predator arrived that preferred dark-tan crabs. A new predator arrived that preferred light-tan crabs. A change in beach color made medium-tan crabs the least visible to predators. A change in beach color made medium-tan crabs the most visible to predators.

Answer 1

Answer: The correct answer is B) Native shellfish populations have dramatically decreased as they are outcompeted by the crabs, causing a decrease in biodiversity.

Explanation: Green crabs represent a serious threat to biodiversity in the ocean ecosystem because they are predators that feed with animals that are part of the biodiversity such as clams, mussels, and oysters. As the predators they are, they can dramatically change the ecosystem by affecting the living and reproduction of many species.