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Impact of microplastic exposure on the health of tropical seagrass (Enhalus acoroides) seedlings

Marine Pollution Bulletin 2025 4 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Aditya Hikmat Nugraha, Aditya Hikmat Nugraha, Fadhliyah Idris, Tri Apriadi, Carla Dhevanda, Muhammad Yudhistira Azis, Khairul Hafsar

Summary

Researchers tested the effects of microplastic exposure on tropical seagrass seedlings and found that increasing concentrations reduced chlorophyll content, disrupted photosynthesis, and lowered survival rates. At the highest concentration tested, the seedlings were unable to develop into mature plants. The study suggests that microplastic pollution in coastal waters could threaten the establishment of seagrass meadows, which are important habitats for marine life.

The early stages of seagrass life are marked by the development of seagrass seedlings. Enhalus acoroides is a persistent seagrass species with a high prevalence in tropical waters. The decline in water quality caused by human activities, such as microplastic contamination, is suspected to affect the growth and development of seagrass seedlings. This study examines the impact of microplastic exposure on the growth, chlorophyll content, and anatomical structure of Enhalus acoroides seedlings. This experimental research included four treatments: Treatment A (no microplastics), Treatment B (0.5 g/L microplastics), Treatment C (1.0 g/L microplastics), and Treatment D (1.5 g/L microplastics). The results show that increasing microplastic concentrations disrupt photosynthesis in seagrass seedlings, indicated by a decrease in chlorophyll content, which leads to reduced growth and lower survival rates in seedlings (Treatment D). Based on this study, it is suggested that higher microplastic exposure may prevent seedlings from developing into mature seagrass individuals.

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