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Illustrating the integrity of aquatic ecological environment function is the basis of establishing a life community. In this study, water quality, benthos and phytoplankton were investigated at 49 aquatic ecological function zones in Tai Lake Basin of Jiangsu Province in 2020. The community structure and quality of benthos and phytoplankton in the water ecological environment functional area of Tai Lake Basin were evaluated, and the realization of water quality objectives and aquatic ecological quality objectives were analyzed. The results showed that 94 species of benthos were identified from 57 sites in Tai Lake Basin, and the two predominant species of benthos community were Limnodrilus hoffmeisteri and Corbicula fluminea. 247 species of phytoplankton were identified from 17 sites, categorizing into 113 genera of 7 phyla, 51 species of Bacillariophyta, 107 species of Cyanophyta, 57 species of green algae, 7 species of Cryptophylum, 9 species of Dinoflagellata, 15 species of Euglenophyta and 1 species of Chrysophyta. The dominant species is Microcystis. The community structure of benthos and phytoplank- ton are developing in a good direction; the grade evaluated by quality indexes of benthos and phytoplankton are lower than the grade of water quality evaluation in all the four aquatic ecological functional zones of Tai Lake Basin. Referring to the water quality and aquatic ecological quality goals of 2020, 81.6% of the 49 aquatic ecological environment functional zones satisfy the water quality goal, which is much higher than ratio of the zones satisfying aquatic ecological quality (40.8% ). This study implies that, water environment management should shift from focusing on sole water quality goal to considering both water quality and aquatic ecology. [ABSTRACT FROM AUTHOR]

Objective: To determine the contents of tiliroside [kaempferol 3-O-beta-D-(6 " -p-coumaroyl) glucopyranoside] in the Daphne genkwa., Method: The separation was performed on ZORBAX XDB C18 column (4.6 mm x 250 mm, 5 microm), using acetonitrile and water/acetic acid mixture (1,000/1) (gradient elution: 0-18 min, 26 : 74; 18-33 min, 80 : 20) as mobile phase with the rate of 1.0 mL x min(-1) at 25 degrees C, the wavelength for measurement was 310 nm., Result: The linearity was in the range of 0.1-5.0 microg (n=6), and the correlation coefficient was 0.9999. The average recovery for compound tiliroside was 101.50% (RSD 0.90%) (n=6)., Conclusion: This method is accurate, reliable and reproducible to determine tiliroside in the D. genkwa.