Journal of Ecology and Rural Environment ›› 2020, Vol. 36 ›› Issue (11): 1369-1374.doi: 10.19741/j.issn.1673-4831.2020.0050

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Analysis of Bird Diversity Variation in Poyang Lake Based on Optimized Living Planet Index

LIU Wei1, LI Hang2, YI Jian-feng1, SHAO Ming-qin3, LIU Guan-hua4, XU Hai-gen1, ZHANG Ri-quan2   

  1. 1. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China;
    2. School of Statistics, East China Normal University, Shanghai 200062, China;
    3. College of Life Science, Jiangxi Normal University, Nanchang 330022, China;
    4. Jiangxi Poyang Lake National Nature Reserve Administration, Nanchang 330325, China
  • Received:2020-01-19 Online:2020-11-25 Published:2020-11-18

Abstract: The study focuses on the optimization of living planet index (LPI) to analyze the variation of biodiversity in fine scale. Comentropy and logarithm were utilized to generate these new indexes (LPIN1 and LPIN2). Using bootstrap method with Wilcoxon symbol rank test and 95% confidence interval, these optimized indexes were compared among different years. Based on the data on continuous bird monitoring in Poyang Lake from 2011 to 2017, the diversity of bird community was obtained by conventional method, LPI, LPIN1 and LPIN2. Results demonstrate that the two optimized indexes rose by 5% and ecosystem in Poyang Lake was stable. Besides, LPI index rose by 53%, which is not within the reasonable variation range of diversity index in Poyang Lake. Shannon-Wiener index and Simpson index indicate that the biodiversity was stable among different years, but failed to reflect the variation of the index. In contrast, two optimized new indexes can better delineate the variation trend of biodiversity in a fine scale and reflect the health of ecosystems in the Poyang Lake.

Key words: living planet index, Poyang Lake, birds

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