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- W2368382722 abstract "The paper is aimed at introducing the heavy-metal contamination features and the ecological risks in the upper stream and its inlet branches of Huangpu River. In the paper,a particular attention has been paid to the investigation of the survival situation of the macro-invertebrates and the potential ecological risks that are likely to be brought about by the heavy-metal contaminants in the riverbed sediments in the said part of the river. To be exact,the samples for our study and analysis have been gathered from the twelve well-distributed sampling points with the contaminants of Cu,Pb, Cd,Hg and Zn in the sediments analyzed in the lab in October 2009. Moreover,closer observation and tests have particularly been made with the heavy metal contents in Cu,Pb,Cd and Zn via the atomic absorption spectrophotometry with the content of Hg measured by the cold-vapor atomic absorption method. Assessment of potential ecological risk of the study area has been done by Hakanson ecological risk index method. Furthermore,we have investigated the community structure metrics of macroinvertebrate and analyzed the correlation between the risk index of heavy metals and the community metrics. The results of our investigation of the potential ecological risks by using the ecological risk index method show that the ecological risk in the study area belongs to the state in-situ between no pollutionandmediumlevel,whereas the ecological risk in the provincial boundaries between Zhejiang and Jiangsu and inlet rivers turn to be rather high. Of all the heavy-metal contaminants,Cd and Hg are the two chief eco-risk contributors as we have discovered in the study area. In our paper,we have found the eight species of macro-invertebrate belong to the pollution tolerant species. In terms of the Shannon-Wiener diversity index represented by H',it is in most cases represented by less than one,which means heavy pollution level. What is more,H' has been found in positive correlation with the content of Pb,Hg and Zn,and in negative correlation with the content of Cd and Cu. The density of different species of macroinvertebrate have been found quite diverse responses to the heavy metal contaminants. For example,the density of Polychaeta and Lamellibranchia is negatively correlated with each five heavy metals, whereas the density of Oligochaeta( represented by Limnodrilus hoffmeisteri) has been found positively correlated with the contamination of Cu and Hg. In addition,the density of gastropod( represented by Bellamya aeruginosa) proves to have positive correlation with the contamination of Cu,Hg and Zn and RI." @default.
- W2368382722 created "2016-06-24" @default.
- W2368382722 creator A5035653543 @default.
- W2368382722 date "2014-01-01" @default.
- W2368382722 modified "2023-09-24" @default.
- W2368382722 title "Investigation of macroinvertebrates and the potential ecological risks of heavy-metal contaminants in the riverbed sediments in the upstream Huangpu River" @default.
- W2368382722 hasPublicationYear "2014" @default.
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