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November 1989 - 1990 in February and November 2001 - 2002 February Nature Reserve in Jilin Province, left home to mountain secondary broad-leaved forest in winter bird community structure were studied on 12 years changes were compared. Survey, two winter 28 days 144.5h field investigation and data collection of nearly 20,000. 12 years ago are in the same plot to work, so the findings are comparable. Niche by feeding on bird composition and number of species, species diversity and uniformity and consumer biomass, birds, birds cluster and interspecific encounter probability and other aspects of the research, basic elucidate the temperate environment northern China mountain secondary broad-leaved forest in winter bird community structure characteristics, as well as 12 years ago, the trend of changes in the structure of the bird community, and environmental changes in the relationship. The main results are as follows: 1. 12 years ago after the two winter surveys, bird communities were composed of 19 species and 20 species of birds, the two surveys, there are 17 kinds of the same bird community named by the marsh tit, long-tailed tits and Dusky Thrush bird species composition. Regardless of species composition, or the number of point of view, changed little in 12 years ago. 2.2001-2002 winter bird community species diversity index (H ') and evenness (J') were higher than in the winter of 1989-1990, while the consumption of biomass (SCB) the previous survey. The t-test results show that the diversity index, evenness index of consumer biomass, 12 years ago, after the difference is not significant (P> 0 01). 3. See from birds residence type, permanent birds, whether from a number of species, or the number of individuals are far more than the seasonal birds, more than 80%, reflecting the characteristics of the northern winter birds. 4. DBH bird foraging species 12 years ago after a significant (P <0. 01), the characteristics of their students habitat species DBH change significantly (P <0.01) is consistent. Bird foraging species diversity (H ') did not change after 12 years ago. 5. Seven kinds of birds are feeding niche width statistical calculations, including feeding way feeding height vertical position, the horizontal position of the canopy, the canopy feeding matrix and feeding species. Seven species of birds feeding niche breadth change was not significant (P> 0 knife 1). 6. Winter birds cluster obvious single population of long-tailed tits, spot crow, magpie, the bird of peace, and Black-naped Green Woodpecker group, the average number of individuals per group 6.26 door 1990) and 7.44 (2001 - 2002), mixed group constituted by big tit, marsh tit and ordinary parcels, the average number of species per group of three kinds, the average number of individuals in about 7.4. The number of mixed group of single population. 7. Probability of interspecific encounter in the winter of 1989-1990 0.8195,2001 - 2002 0.8487. Through this research, aims to explore the mountain secondary broad-leaved forest in winter bird community structure characteristics and trend, and to provide a scientific basis for the role in the ecosystem and the environment for the study of Ukrainian groups fall in winter.
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