Today, in our marine biology lecture, we'll discuss the impact of ocean acidification on coral reefs. As carbon dioxide levels rise, the ocean absorbs more CO2, leading to a decrease in pH. This process, called ocean acidification, severely affects coral growth. A recent study by the University of Queensland found that coral calcification rates have dropped by 15% since 1990. Interestingly, some coral species, like the massive Porites, show greater resilience than branching corals. However, the overall biodiversity in affected reefs is declining, with fish populations decreasing by up to 30% in high-acidification areas. Researchers emphasize the need for global action to reduce emissions.
❓ Según la conferencia, ¿qué se ha observado respecto a los arrecifes de coral desde 1990?
A. A. Las tasas de calcificación de los corales han aumentado en un 15%.
B. B. Las tasas de calcificación de los corales han disminuido en un 15%.
C. C. Las poblaciones de peces en todos los arrecifes han aumentado en un 30%.
D. D. Los corales ramificados son más resilientes que los Porites masivos.
✅ 正确答案
B. Coral calcification rates have decreased by 15%.