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| Grey relation analysis between Plankton-index of bioticintegrity and water quality in Yantan reservoir |
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| Abstract: |
| In order to assess the ecosystem condition of Yantan reservoir， 3 points of different aquaculture types
were set in Yantan reservoir to examine the main physical and chemical factors affecting water quality， sampling once a
year. So as to construct the evaluation system of Plankton-index of biotic integrity（P-IBI） ， the grey relation analysis
method was use to analyze the relationaship between P-IBI and water quality in Yantan reservoir. The results showed
that， the ecosystem condition of pen-closing culturing pattern（point C）was better than that of cage culturing inferior
intensive pattern（point B）and cage culture intensive（point A） pattern in Yantan reservoir. pH， water temperature，
COD Mn were the major factors influencing P-IBI value. |
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