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Spatial distribution pattern and allometric growth of three common species on moving sand dunes in Horqin Sandy Land, China.

JIA Mei-yu1,2, LI Xue-hua1, Oh Choong-hyeon3, Park Hong-chul3, MIAO Chun-ping1,2, HAN Xu1,2   

  1. (1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2University of Chinese Academy of Sciences, Beijing 100049, China; 3Dongguk University, Seoul 100715, Korea)
  • Online:2015-10-18 Published:2015-10-18

Abstract: Research on fine scale pattern and characteristics of allometric growth could contribute to better understanding plants’ adaptation in moving sandy dunes. The abundance, height and biomass of 3 species Agriophllum aquarrosum, Corispermum candelabrum and Setaria viridis in  twentyeight 1 m × 1 m quadrats of Horqin Sandy Land were identified, mapped and described. The nearest neighbor method and O-ring O(r) function analysis were applied to analyze the spatial patterns. The results showed that the individual spatial pattern was mainly aggregated in 1 m×1 m quadrat at community level but mainly random at population level. At 0-50 cm individual distance scale, both intraspecific and interspecific relationship were facilitation and aggregated distribution occurred at some scales and varied with increasing plant abundance in 1 m×1 m quadrat. In 0-40 cm, the aggregated distribution of S. viridis and A. aquarrosum increased obviously; in 10-20 cm, both intraspecific and interspecific aggregation increased; in 10-30 cm, the occurrence possibility of positive correlations between S. viridis and A. aquarrosum, S. viridis and C. candelabrum all increased; in 40-50 cm, the possibility of positive correlations between A. squarrosum and S. viridis, A. squarrosum and C. candelabrum all increased. Research on the three species components indicated that the growth rate of aboveground was faster than that of underground. S. viridis had the highest ratio of underground biomass to aboveground biomass but its nutritional organs’ biomass ratio was medium. C. candelabrum allocated more biomass to propagative organs and stem, but A. squarrosum allocated more biomass to nutritional organs. Based on the spatial distribution and allometric characteristics, the three common species in moving sand dunes preferred r strategy in their life history.