Effect of Plant Phenology on Bird Community Diversity

In order to explore the correlation between plant phenophase and bird community diversity, observations on vegetation and birds was conducted from February 4 to September 27, 2022 in Donghu Campus of Zhejiang A & F University. Pentad (5 days) was used as the basic unit for the analysis of the time distribution characteristics of phenology, and pentad sequence as basic variable to describe the occurrence of phenological phenomena. The seasonal phases were divided by phenological frequency curve and frequency distribution. Bird community diversity was calculated by Shannon-Wiener diversity, Pielou evenness and Margalef richness index. The result showed that the 6th-20th pentad in 2022 was spring, and the 21st-44th pentad was summer, with buds, leaves, flowers and fruits as the main phenological stage. A total of 107 species of bird of 82 genera and 42 families of 16 orders were recorded, among them, 52 species of resident birds (47.27%), 28 species of summer migratory birds (25.45%), 19 species of winter migratory birds (17.27%) and 11 species of travelers (10.00%). There were two resident species of Ardea cinerea, Ardea alba, Hypsipetes leucocephalus. And the highest values of Shannon-Wiener diversity, Pielou evenness and Margalef richness index were at the 14th (1.440 6), 25th (0.393 4) and 20th pentad (9.806 6). The diversity and richness of birds in spring were higher than that in summer, and the evenness was slightly lower than that in summer. Increase of the edible part of plants in spring had positive effect on the number of plant-feeding birds.