Evaluation and mitigation of potentially toxic elements contamination in mangrove ecosystem: Insights into phytoremediation and microbial perspective
Journal
Marine Pollution Bulletin
Journal Volume
209
Start Page
117035
ISSN
0025326X
Date Issued
2024-12
Author(s)
Gobinda Dey
Jyoti Prakash Maity
Pritam Banerjee
Raju Kumar Sharma
Koyeli Das
Gopalakrishnan Gnanachandrasamy
Chin-Wen Wang
Pin-Yun Lin
Chien-Yen Chen
Abstract
Mangroves, essential coastal ecosystems, are threatened by human-induced Potentially-toxic-elements (PTEs) pollution. This study analyzed PTEs distribution, phytoremediation potential, and rhizosphere microbial communities in Taiwan's Xinfeng mangrove forest. Significant variations in physicochemical and PTEs concentrations were observed across adjacent water bodies, with moderate contamination in the river, estuary, and overlying water of mangroves sediment. The partition-coefficient showed the mobility of Bi, Pb, Co, and Sr at the water-sediment interface. The geochemical-indices revealed high Bi and Pb contamination and moderate Zn, Sr, Cu, and Cd contamination in sediment. The overall pollution indices indicated the significant contamination, while moderate ecological risk was found for Cd (40 ≤ Eri < 80). Mangroves Kandelia obovata and Avicennia marina exhibited promising PTEs phytoremediation potential (Bi, Cd, Mn, Sr, and Co). Metagenomics indicated a diverse microbial community with N-fixation, P-solubilization, IAA synthesis, and PTEs-resistance genes. These findings underscore the need for targeted conservation to protect these critical habitats.
Subjects
Ecological risk assessment
Mangrove ecosystems
Phytoremediation
Plant growth promoting microbes
Potentially toxic elements
Rhizospheric microbial community
Publisher
Elsevier Ltd
Type
journal article