Department of Oceanography and Coastal Area Studies, Alagappa University, Science Campus, Karaikudi, Tamil Nadu, 630 003, India.
Environ Sci Pollut Res Int. 2021 Jun;28(21):26849-26857. doi: 10.1007/s11356-021-12482-z. Epub 2021 Jan 26.
The present study deals with the bioaccumulation of heavy metals in different seagrass species (Syringodium isoetifolium, Halodule pinifolia, Cymodocea serrulata, Halophila ovalis) along Thondi coast and decaying seagrass offshore. Heavy metal concentrations in the seagrass samples were analysed during the period of April 2019 to March 2020 using atomic absorption spectrophotometry. Among the heavy metals assayed, the level of manganese was higher (15.62 ± 1.02 mg/kg) and chromium was the least metal observed (0.002 mg/kg). One-way ANOVA revealed significantly higher level of heavy metals in summer season, while it gradually decreased through pre-monsoon to monsoon season (P < 0.05). Cadmium and chromium were observed to be below detectable levels in the seagrass species. S. isoetifolium was found to bioaccumulate higher levels of heavy metals than the other seagrass species studied. Elucidation of heavy metal levels in the dead and decayed seagrass offshore revealed a higher level of heavy metals than live seagrass species.
本研究涉及不同海草物种（Syringodium isoetifolium、Halodule pinifolia、Cymodocea serrulata、Halophila ovalis）在 Thondi 海岸和近海腐烂海草中的重金属生物累积。2019 年 4 月至 2020 年 3 月期间，使用原子吸收分光光度法分析海草样本中的重金属浓度。在所测定的重金属中，锰的含量较高（15.62±1.02mg/kg），铬的含量最低（0.002mg/kg）。单因素方差分析显示，夏季重金属含量显著较高，而在前季风到季风季节逐渐降低（P<0.05）。在海草物种中观察到镉和铬含量低于可检测水平。研究发现，与其他研究的海草物种相比，S. isoetifolium 积累了更高水平的重金属。对近海腐烂海草中重金属水平的阐明表明，重金属含量高于活体海草物种。
