Viết tích hợp TOEFL

📖 Đoạn văn

The establishment of large marine protected areas (MPAs) has been widely promoted as a key strategy for ocean conservation. Proponents argue that MPAs deliver three major benefits. First, they effectively restore fish populations by providing a safe haven from fishing pressure, allowing overexploited species to recover and spill over into adjacent areas. Second, MPAs protect critical habitats such as coral reefs and seagrass beds from destructive human activities like trawling and anchoring, thereby preserving biodiversity and ecosystem resilience. Third, MPAs serve as natural laboratories for scientific research, enabling scientists to study undisturbed ecosystems and compare them with exploited areas, which informs better fisheries management. For example, the Great Barrier Reef Marine Park in Australia has been credited with increasing the abundance of certain fish species within its boundaries, and studies of the Papahānaumokuākea Monument in Hawaii have revealed thriving deep-sea ecosystems. Given these advantages, expanding MPAs to cover 30% of the global ocean by 2030 seems a logical and urgent priority.

🎧 Bài giảng

While the reading highlights the supposed benefits of large marine protected areas, a closer examination reveals serious flaws in each argument. First, the claim that MPAs restore fish populations is misleading. In reality, many MPAs are placed in remote, low-productivity regions that are not major fishing grounds, so they protect fish that are not under threat, while heavily fished areas remain open. Moreover, fish are highly mobile; they often swim outside MPA boundaries, where they are immediately caught, undermining any spillover effect. Second, the assertion that MPAs protect critical habitats ignores the fact that many threats, such as ocean warming, acidification, and pollution from land-based sources, cross MPA boundaries. These global stressors can degrade habitats even within protected areas, as seen in the Great Barrier Reef, which has suffered mass coral bleaching despite its protected status. Third, the idea of MPAs as natural laboratories is flawed because they are not truly undisturbed. Many MPAs allow certain extractive activities, such as indigenous fishing or scientific collecting, and they cannot replicate pre-human conditions. Furthermore, data from MPAs are often compared with areas that have different environmental characteristics, leading to false conclusions about human impact. Consequently, the effectiveness of large MPAs is far less certain than the reading suggests, and they may divert resources from more direct conservation measures, such as fisheries regulation and pollution control.