Journal of Dalian Ocean University  2010, Vol. 25 Issue (6): 480-487 DOI: 10.3969/j.issn.1000-9957.2010.06.002 |
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| An assessment of ecosystem health in Taizi River basin using F-IBI |
| SONG Zhi-gang,WANG Wei,JIANG Zhi-qiang,YIN Xu-wang,TAN Shu-rong ,ZHANG Yuan,MENG Wei
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| 1.Key Laboratory of Mariculture,Ministry of Agriculture,People＇s Republic of China,Dalian Ocean University,Dalian 116023,China;2.Chinese Research Academy of Environmental Sciences,Beijing 100012,China |
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Abstract Fish index of biotic integrity（F-IBI） was used to assess the environmental conditions in Taizi River basin.Five indexes including total number of taxa,total fish catch,percent of subfamily Leuciscinae,percent of tolerant species,and percent of widespread species were selected for the establishment of F-IBI by analysis of reflect disturbance,Pearson correlation and judgment ability performed on 23 candidate metrics in the samples collected from 61 sites（26 reference sites and 35 impaired sites） in Taizi River basin during May of 2009.The values of metrics were calculated by three scoring methods,and F-IBI was established by combination of the 5 indices.The values of IBI were found to be ranged from 5 to 25,IBI=25-22 for the healthy fish,21-18 for the sub-healthy,17-14 for the fair,13-10 for the poor,and 9-5 for the very poor.The results showed that there were 19 sites for the healthy,11 sites for the sub-healthy,12 sites for the fair,11 sites for the poor and 8 sites for the very poor in Taizi River basin,and there were significant relationship between the IBI values and habitat quality（P0.01）.
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Published: 30 December 2016
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