https://scholars.lib.ntu.edu.tw/handle/123456789/548315
標題: | Assessing impacts of metallic contamination along the tidal gradient of a riverine mangrove: Multi-metal bioaccumulation and biomagnification of filter-feeding bivalves | 作者: | SAU-WAI YAM Fan, Y.-T. Tan, Z. Wang, T.-D. Chiu, C.-Y. |
關鍵字: | Bioaccumulation; Bioindicator; Biomagnification; Mangroves; Metal burden; Urbanizedestuary | 公開日期: | 2020 | 卷: | 11 | 期: | 5 | 來源出版物: | Forests | 摘要: | Most riverine mangroves (characterized by salinity fluctuations and tidal inundations), are seriously threatened by metallic pollution. Whether differences in salinity and tidal effects along the river continuum can affect metallic bioaccumulation and the biomagnification of species is still unknown. Bivalves are representative sessile inhabitants in mangrove ecosystems, with a high capacity to bioaccumulate metallic contaminants. The present study used two bivalves, Meretrix lusoria and Mytilopsis sallei, to monitor inter-site changes in metallic contamination and assess the associated ecological impacts along the tidal gradients of riverine mangroves. The concentrations of a total of six metals (Cr, Ni, Cu, Zn, Cd and Pb) in M. lusoria and M. sallei, collected at three different sites along Danshuei Riverine Mangrove, were investigated. The metallic concentrations of the whole soft body of the studied bivalves, and the associated surface sediment from each site, were analyzed using inductively coupled plasma mass spectrometry (ICP-MS) to determine the inter-site effects on the bioaccumulation and biomagnification of metallic contaminants in bivalves. There are increasing concentrations of four metallic contaminants, Zn, Cr, Cd and Cu, in the seaward direction of the bivalves. The increasing mean metallic concentrations along the seaward direction may be the effect of salinity, further decreasing the rate of the elimination of these metals, thus resulting in a net increase in metallic contaminants. Our results clearly show prominent inter-site changes in the metallic burdens of bivalves in our study on riverine mangrove ecosystems associated with different levels of bioaccumulation and biomagnification of metallic contaminants. Thus, it is important to monitor multiple sites along the dynamic environment of riverine mangroves in order to gain a good understanding of the ecological impact of metallic pollution risks. The present findings provide important evidence of the use of simple indices to assess the ecological impacts of metallic pollution in riverine mangroves. © 2020 by the authors. |
URI: | https://www.scopus.com/inward/record.url?eid=2-s2.0-85085662838&partnerID=40&md5=8b9b131056ef5805d4c0f76a26a79dec https://scholars.lib.ntu.edu.tw/handle/123456789/548315 |
DOI: | 10.3390/F11050504 | SDG/關鍵字: | Bioaccumulation; Biochemistry; Contamination; Ecosystems; Inductively coupled plasma mass spectrometry; Molluscs; Pollution detection; River pollution; Dynamic environments; Inductively coupled plasma mass spectrometries (ICPMS); Mangrove ecosystems; Metallic concentration; Metallic contaminants; Metallic contamination; Salinity fluctuation; Whether differences; Metals; bioaccumulation; bivalve; concentration (composition); filter feeding; heavy metal; inductively coupled plasma method; intertidal environment; mangrove; marine pollution; risk assessment; Biochemistry; Ecosystems; Impurities; Mangrove; Metals; Rivers; Salinity; Water Pollution; Bivalvia; Meretrix lusoria; Mytilopsis sallei; Rhizophoraceae |
顯示於: | 生物環境系統工程學系 |
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