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Citation:

Analysis on Spatial Distribution Pattern for Main Populations and Gap Makers in Korean Pine Broad-leaved Forest in Xiaoxing'anling Mountains of Northeast China

  • Received Date: 2015-12-07
  • [Objective] To analyze the spatial pattern of main populations and gap makers formed by uprooting in permanent plot in Korean pine broad-leaved forest of Xiaoxing'anling Mountains.[Method] Based on field surveys and data statistics, the spatial distribution pattern and spatial association of four most important populations and the gap makers formed by uprooting at different spatial scales in the 2.55 hm2 permanent plot were studied by using point pattern analysis.[Result] The result showed that great differences in the density of main populations were observed for total 8 tree species with DBH greater than 1 cm in tree layer. The DBH class structure of all populations roughly exhibited asymmetrically unimodal curve. The importance values of Pinus koraiensis, Picea koraiensis, Betula platyphylla and Ulmus spp. were ranked the top four in this plot. Pinus koraiensis and Betula platyphylla exhibited an aggregated distribution pattern at the whole research scale. The spatial distribution pattern of Picea koraiensis changed from aggregated, random to uniform distribution over the spatial scale. For Ulmus spp., its distribution was aggregated at ≤16 m scale and random at the other scales. Except that the significant negative correlation existed between Pinus koraiensis and Picea koraiensis, Pinus koraiensis and Betula platyphylla, Pinus koraiensis and Ulmus spp. at small scale, significant positive correlation between Picea koraiensis and Ulmus spp. at small scale, no significant spatial associations were observed among the other populations. Pinus koraiensis and Picea koraiensis were the major components of gap makers formed by uprooting in the plot. Spatial distribution pattern of gap makers was characterized as uniform distribution at 3~6 m scale and random distribution at all other research scales.[Conclusion] There were differences in spatial distribution pattern and spatial association among populations in different research scale in Korean pine broad-leaved forest of Xiaoxing'anling Mountains, Pinus koraiensis and Picea koraiensis are easy to form uprooted treefalls with the whole random distribution in the plot.
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Analysis on Spatial Distribution Pattern for Main Populations and Gap Makers in Korean Pine Broad-leaved Forest in Xiaoxing'anling Mountains of Northeast China

  • 1. College of Forestry, Northeast Forestry University, Harbin 150040, Heilongjian, China
  • 2. Department of Architectural Engineering, Dazhou Vocational and Technical College, Dazhou 635000, Sichuan, China

Abstract: [Objective] To analyze the spatial pattern of main populations and gap makers formed by uprooting in permanent plot in Korean pine broad-leaved forest of Xiaoxing'anling Mountains.[Method] Based on field surveys and data statistics, the spatial distribution pattern and spatial association of four most important populations and the gap makers formed by uprooting at different spatial scales in the 2.55 hm2 permanent plot were studied by using point pattern analysis.[Result] The result showed that great differences in the density of main populations were observed for total 8 tree species with DBH greater than 1 cm in tree layer. The DBH class structure of all populations roughly exhibited asymmetrically unimodal curve. The importance values of Pinus koraiensis, Picea koraiensis, Betula platyphylla and Ulmus spp. were ranked the top four in this plot. Pinus koraiensis and Betula platyphylla exhibited an aggregated distribution pattern at the whole research scale. The spatial distribution pattern of Picea koraiensis changed from aggregated, random to uniform distribution over the spatial scale. For Ulmus spp., its distribution was aggregated at ≤16 m scale and random at the other scales. Except that the significant negative correlation existed between Pinus koraiensis and Picea koraiensis, Pinus koraiensis and Betula platyphylla, Pinus koraiensis and Ulmus spp. at small scale, significant positive correlation between Picea koraiensis and Ulmus spp. at small scale, no significant spatial associations were observed among the other populations. Pinus koraiensis and Picea koraiensis were the major components of gap makers formed by uprooting in the plot. Spatial distribution pattern of gap makers was characterized as uniform distribution at 3~6 m scale and random distribution at all other research scales.[Conclusion] There were differences in spatial distribution pattern and spatial association among populations in different research scale in Korean pine broad-leaved forest of Xiaoxing'anling Mountains, Pinus koraiensis and Picea koraiensis are easy to form uprooted treefalls with the whole random distribution in the plot.

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