❓ 题目 According to the passage, which of the following best describes the main effect of removing Pisaster ochraceus from tidal pools?
- A. A) It increased the overall nutrient availability in the ecosystem.
- B. B) It caused a decrease in species diversity due to mussel dominance.
- C. C) It led to an increase in the number of predatory species.
- D. D) It had little effect because starfish were not abundant.