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Scientia Silvae Sinicae ›› 2014, Vol. 50 ›› Issue (3): 1-9.doi: 10.11707/j.1001-7488.20140301

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Periodic Characteristics of Distribution Pattern of Haloxylon ammodendron in Gurbantunggut Desert Based on Eco-Used Wavelet

Song Yuyang1,2, Li Yuanyuan1, Li Mingyan1   

  1. 1. Department of Forestry, Agricultural College, Shihezi University Shihezi 832003;
    2. Key Laboratory of Environment and Ecology in Western China, Ministry of Education Northwest A & F University Yangling 712100
  • Received:2012-11-15 Revised:2014-01-20 Online:2014-03-25 Published:2014-04-16

Abstract:

In this paper, the eco-used wavelet with Mexican Hat and Morlet was used to research the wave characteristic of Haloxylon ammodendron distribution pattern in three sites and three dune types. The results showed that: the eco-used wavelet with Mexican Hat and Morlet educed the primary cycle which was closed to the extension distance of sand dunes, suggesting that the length of sand dunes was consistent with the wave cycle of H. ammodendron distribution pattern. The application of Morlet wavelet in smaller scales was able to identify the characteristic of portion accumulation. By the examination of mutation point for characteristic scale, the result showed that It is only at the significant mutation points in which the method can well predict the future distribution pattern of H. ammodendron. This study indicated some factors, such as the sand dunes shape, slope position and soil factors, affected the Haloxylon ammodendron distribution pattern.

Key words: eco-used wavelet, cycle, multi-scale abrupt change and prediction, Haloxylon ammodendron

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