浙北马尾松人工林鸟类群落结构和多样性指数的季节变化

浙江省北部马尾松人工林春季鸟各丰富度最高（４７种），秋季最少（３１种），冬、夏季分别为３５种和３６种。留留种类秋季最多是（６７７％），春季的迁徙鸟种类最多（５７．４％）。冬、春、夏、秋，鸟类平均密度分别为５６．８７、５６．８１、４７．２５及４９．３５只／１０ｈｍ＾２。春季留鸟的平均密度最高（４３．１０只１０／ｈｍ＾２），依次是夏、秋、冬季，分别为４１．４７、３９．０５和３６．７６只／１０ｈｍ＾２。

THE SEASONAL CHANGES OF BIRD COMMUNITY AND BIRD SPECIES DIVERSITY IN MASSON PINE(PINUS MASSONIANA LAMB.) PLANTATION IN NORTHERN ZHEJIANG PROVINCE

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, 47.25and 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.