IELTS Free Online Writing Practice - Discuss the impact of ocean acidification on marine life.
IELTS.WORK Free Online Writing Practice # 1712273215
IELTS Writing Task 2 Topic: "Discuss the impact of ocean acidification on marine life."
Model Answer:
In recent years, ocean acidification has emerged as a significant concern for marine ecosystems worldwide. This phenomenon is primarily due to the absorption of carbon dioxide (CO₂) from the atmosphere by seawater, leading to a decrease in pH levels and an increase in hydrogen ions concentration. The subsequent effects on marine life are complex and multifaceted, encompassing physiological, ecological, and socio-economic dimensions.
On the physiological level, ocean acidification has been shown to affect the shell-building capacity of certain marine organisms, such as mollusks, crustaceans, and some species of plankton. As the ocean's acidity increases, the availability of carbonate ions decreases, which are essential for these organisms to form calcium carbonate structures. Consequently, many species experience difficulty in constructing their shells or exoskeletons, leading to reduced survival rates and impeded growth.
Moreover, ocean acidification can also impact the behavioral and reproductive processes of marine life. For instance, studies have revealed that acidic environments can impair the navigation and foraging abilities of some fish species, rendering them more vulnerable to predation. Additionally, it has been observed that altered pH levels can disrupt the reproductive cycles of certain marine organisms, affecting their populations in the long term.
From an ecological perspective, the cascading effects of ocean acidification on individual species can lead to shifts in marine food webs and ecosystems. As key species are impacted by these changes, the stability and resilience of marine ecosystems may be compromised, ultimately affecting the broader biodiversity of our oceans. This disruption in the balance of marine life could have far-reaching consequences for other dependent species, including human populations that rely on seafood as a vital source of protein and income.
Lastly, ocean acidification also carries implications for global socio-economic systems. The decline in marine life due to acidification can result in the loss of valuable fisheries resources, which would have significant ramifications for both coastal communities and international trade. Furthermore, as coral reefs and other critical marine habitats become more susceptible to degradation, the ecosystem services they provide, such as coastal protection and tourism revenue, may be diminished.
In conclusion, ocean acidification presents a multifaceted threat to marine life, encompassing physiological, ecological, and socio-economic dimensions. The interconnected nature of these impacts underscores the urgency for concerted global efforts to mitigate carbon emissions and promote sustainable practices that safeguard our oceans and the diverse life they support.
IELTS
Scoring:
- Task Response:
9 (Excellent) - The candidate has fully addressed all parts of the question, demonstrated a comprehensive understanding of the topic, and provided well-structured and coherent answers.
- Coherence and Cohesion:
9 (Excellent) - The answer is well-organized with smooth transitions between ideas and clear logical progression. The paragraphs are connected through appropriate cohesive devices, resulting in a unified and coherent response.
- Lexical Resource:
8.5 (Expert) - The candidate employs a wide range of vocabulary accurately and appropriately. Advanced lexical choices enhance the clarity and sophistication of the argument, while grammatical errors are minimal and do not impede understanding.
- Grammar Range and Accuracy:
9 (Excellent) - The answer demonstrates accurate and sophisticated usage of a wide range of grammatical structures, with only minor errors that do not affect overall comprehension.
- Presentation of Ideas:
8.5 (Expert) - The response effectively presents ideas in a clear, concise, and detailed manner, using appropriate examples to support the argument. Sentences vary in length and complexity, which contributes to the overall readability of the text.
Overall
Band Score:
8.75 (Expert)
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