Final answer:
Ocean acidification can lead to several negative impacts on ecosystems, including reduced calcification in marine organisms, increased availability of toxic metals, and impaired respiratory function in fish. However, enhanced growth of corals is not a negative impact commonly associated with acidification.
Step-by-step explanation:
Ocean acidification is the process of ocean waters decreasing in pH due to the absorption of carbon dioxide from the atmosphere. This can have many negative impacts on ecosystems, including reduced calcification in marine organisms, increased availability of toxic metals, and impaired respiratory function in fish. However, enhanced growth of corals is not a negative impact commonly associated with acidification. Instead, acidification can actually lead to the decline of corals on tropical and subtropical reefs.