Abstract：
:Assessment method for ecological condition of Xiangxi River system was studied by using 13 candidate metrics of epilithic diatom which can reflect conditions in pH, salinity, nitrogen uptake metabolism, oxygen requirements, saprobity, trophic state, morphological character and pollution tolerant capability etc. By one-way ANOVA, the metrics of relative abundance of acido-bionotic algae (ACID), freshwater algae (FRESH), high oxygen requirement (HIGH-O), eutraphentic state (EUTRA) and mobile taxa (MOBILE) were suitable for distinguishing sites in different conditions. Then, the river diatom index (RDI) composed of these five metrics was used to evaluate ecological condition of the river. The results showed that the healthiest sites were in the Guanmenshan Natural Reserve (with the mean RDI of 79.73). The sites located in tributary of Jiuchong River also owned excellent state (mean RDI of 78.25). Mean RDI of another tributary - Gufu River and the main river were 70.85 and 68.45 respectively, and the unhealthiest tributary was Gaolan River (with mean RDI of 65.64). The mean RDI for all the 51 sites was 71.40. The competence of RDI was discussed with comparison of evaluation results of DAIpo and TDI, it can be concluded that multimetrics is more competent in assessment task.
journal_name
Environ Monit Assessjournal_title
Environmental monitoring and assessmentauthors
Tang T,Cai Q,Liu Jdoi
10.1007/s10661-006-7666-6subject
Has Abstractpub_date
2006-01-01 00:00:00pages
347-61issue
1-3eissn
0167-6369issn
1573-2959journal_volume
112pub_type
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journal_title：Environmental monitoring and assessment
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journal_title：Environmental monitoring and assessment
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更新日期：2003-02-01 00:00:00
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更新日期：2013-08-01 00:00:00
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更新日期：2018-04-20 00:00:00
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更新日期：2013-05-01 00:00:00
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