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

IELTS.WORK Free Online Writing Practice # 1710994948

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

Model Answer:

Ocean acidification is a major environmental concern that has significant impacts on marine life. This phenomenon occurs when the ocean absorbs carbon dioxide (CO₂) from the atmosphere, leading to a decrease in pH levels and an increase in acidity. The rise in acidity disrupts the delicate balance of marine ecosystems, affecting various species and their habitats.

Firstly, ocean acidification affects calcifying organisms, such as shellfish, corals, and some types of plankton. As the acidity of seawater increases, it becomes more difficult for these organisms to build and maintain their calcium carbonate shells and skeletons. Consequently, this can result in reduced growth rates, weakened shell structures, and even death. For example, oysters have been found to exhibit a decline in their reproductive success due to the increased acidity of their environment.

Additionally, ocean acidification impacts marine life through its influence on food chains and the behavior of species. When predators struggle to find sufficient quantities of prey due to reduced availability or decreased prey size, it can result in a cascade effect throughout the food chain. For instance, seabirds that rely on fish as a primary food source may experience population declines if fish populations are negatively affected by ocean acidification. Moreover, changes in pH levels can also alter the behavior of marine species, such as disrupting migration patterns and affecting breeding habits.

Lastly, ocean acidification exacerbates other environmental stressors, such as rising sea temperatures, pollution, and habitat loss, all of which contribute to the overall decline of marine biodiversity. This combined impact can lead to shifts in species distribution, with some organisms being unable to adapt to the changing conditions and facing potential extinction.

In conclusion, ocean acidification is a pressing issue that poses a significant threat to marine life. Its impacts on calcifying organisms, food chains, and overall ecosystems highlight the urgency for global efforts to reduce carbon emissions and mitigate the effects of climate change. By understanding the implications of ocean acidification, we can work towards developing effective strategies to protect and preserve our precious marine environments.

Scoring:

- Task Response: 8.0 (The candidate has thoroughly addressed all aspects of the topic.)
- Coherence and Cohesion: 8.5 (The candidate demonstrates a logical flow of ideas, with smooth transitions and effective cohesive devices.)
- Lexical Resource: 9.0 (The candidate uses a broad range of vocabulary, including less common or more advanced words where appropriate.)
- Grammatical Range and Accuracy: 8.5 (The candidate demonstrates an advanced level of grammatical accuracy and complexity throughout the essay.)
- Presentation of Ideas: 9.0 (The candidate presents ideas in a clear, focused, and well-structured manner, with effective use of paragraphing and coherence signals.)

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