Institute of Hydrobiology, Jinan University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangzhou 510632, China.
Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
Mar Pollut Bull. 2021 Dec;173(Pt B):113130. doi: 10.1016/j.marpolbul.2021.113130. Epub 2021 Nov 20.
Seaweeds are important primary producers and bioremediation materials, but its litter produced during growth and harvest is one of the restrictions to the sustainable development of seaweed cultivation. In this study, we conducted field investigation and indoor experiments to analyze the bioaccumulation and release of metals in Gracilaria lemaneiformis during the growth and decaying. The investigation revealed the 3.5 × 10 t (wet weight) G. lemaneiformis from a 1500 ha cultivation area bioaccumulated 1925-2353 kg Zn, 233.5-251 kg Cu, 70.5-80.5 kg Pb and 25.5-47 kg Cd, indicating that G. lemaneiformis is a good metals remover. The growth and decaying period of G. lemaneiformis releases, absorbs or adsorbs metals. It has the function of a "heavy metal pool", simultaneously accumulate and release metals. G. lemaneiformis has a strong influence on heavy metals cycling in the seaweed cultivation ecosystem and provides a very good sample for biogeochemistry study for the globally seaweed sustainable development.
海藻是重要的初级生产者和生物修复材料，但在生长和收获过程中产生的废弃物是海藻养殖可持续发展的限制因素之一。在这项研究中，我们进行了实地调查和室内实验，分析了江蓠在生长和腐烂过程中对金属的生物积累和释放。调查显示，在 1500 公顷的养殖区，每 3.5×10^4 吨（湿重）江蓠生物积累了 1925-2353 千克锌、233.5-251 千克铜、70.5-80.5 千克铅和 25.5-47 千克镉，表明江蓠是一种很好的金属去除剂。江蓠的生长和腐烂期会释放、吸收或吸附金属。它具有“重金属库”的功能，同时积累和释放金属。江蓠对海藻养殖生态系统中重金属的循环有很强的影响，为全球海藻可持续发展的生物地球化学研究提供了很好的样本。
