Abstract:

Based on the data obtained from September 1986 to August 1988, it was found that the most bird abundance (47 species) was in spring and the least (31 species) in autumn, and that the bird abundance in winter was 35 and in summer 36 species. There was the most resident bird species (67.7%) in autumn and the most migratory bird species (57.4%) in spring. The average densities in winter, spring, summer, and autumn, were 56.87, 56.81, 47.25 and 49.35 individuals per 10 hm² respectively. The difference of average densities among seasons was not significant. The higher average density of migrant birds, 43.10 individuals per 10 hm², was found in winter, then in spring and in autumn, the lower, 5.49 individuals per 10 hm² in summer. The difference of the migratory birds' densities between winter and summer was very significant. The average densities of the resident birds in one season were always higher than those of the migratory birds in the same and other seasons (F=8.727, P < 0.05). The difference of bird species diversity among seasons was not significant according to the analysis of variance.

Key words: Masson pine (Pinus massoniana Lamb.), Plantation, Bird community, seasonal change, Zhejiang Province