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IELTS Free Online Writing Practice - Discuss the impact of ocean acidification on marine life.

IELTS.WORK Free Online Writing Practice # 1710912737

IELTS Writing Task 2 Topic: Discuss the impact of ocean acidification on marine life.

Model Answer:

In recent years, the phenomenon of ocean acidification has become a significant concern for scientists and environmentalists worldwide. This process, caused by the absorption of carbon dioxide from the atmosphere by seawater, leads to an increase in the acidity level of the ocean. The impact of ocean acidification on marine life is multifaceted and far-reaching, affecting various species in different ways.

Firstly, ocean acidification has a detrimental effect on calcifying organisms, such as mollusks (e.g., oysters, clams) and coral reefs. These organisms rely on the availability of calcium carbonate to build their shells and skeletons. As the acidity level increases, the concentration of carbonate ions in the water decreases, making it more challenging for these creatures to construct their protective structures. Consequently, the survival rate of larval stages is reduced, leading to a decline in marine biodiversity.

Secondly, ocean acidification disrupts the food chain within marine ecosystems. Many predatory species, such as fish and seabirds, rely on shellfish as a primary source of food. The decline in shellfish populations due to increased acidity levels indirectly impacts these predators by reducing their food supply. This disruption can lead to shifts in the balance of marine ecosystems, with potential long-term consequences for both marine life and human populations that depend on it.

Lastly, ocean acidification may also influence the behavior and physiology of marine species. For example, some research suggests that increased acidity levels can affect the ability of fish to detect predators, potentially making them more vulnerable to predation. Furthermore, studies have shown that changes in acidity can impair the reproductive success of various marine organisms, leading to declines in population sizes and genetic diversity.

In conclusion, ocean acidification poses a significant threat to marine life. Its effects on calcifying organisms, disruption of food chains, and alteration of species' behavior and physiology have the potential to cause irreversible damage to marine ecosystems. As such, it is crucial for governments and international organizations to implement effective strategies to mitigate the impact of ocean acidification and protect our oceans for future generations.

Score (based on IELTS scoring standards):

Task Response: 9
Coherence and Cohesion: 8.5
Lexical Resource: 7.5
Grammatical Range & Accuracy: 8.5

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