Morphological Characteristics and Distribution Patterns of Nebkhas in Desert-oasis Ecotone

Zhang Jinhu; Tang Jinnian; Li Delu; Wei Linyuan; Man Duoqing; Chai Chengwu

doi:10.7522/j.issn.1000-694X.2015.00078

Journal of Desert Research >

2015 , Vol. 35 >Issue 5: 1141 - 1149

DOI: https://doi.org/10.7522/j.issn.1000-694X.2015.00078

Morphological Characteristics and Distribution Patterns of Nebkhas in Desert-oasis Ecotone

Zhang Jinhu ,
Tang Jinnian ,
Li Delu ,
Wei Linyuan ,
Man Duoqing ,
Chai Chengwu

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1. State Key Laboratory Breeding Base of Desertification and Aellian Sand Disaster Combating, Gansu Desert Control Research Institute, Lanzhou 730070, China;
2. Lanzhou University, Lanzhou 730000, China;
3. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China

Received date: 2014-12-29

Revised date: 2015-03-06

Online published: 2015-09-20

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Abstract

The desert-oasis ecotone in Minqin,Gansu, China was selected as the studied area, and the morphological characteristics and distribution patterns of nebklas in three habitats, just desert, desert-oasis ecotone and oasis were researched by the quadrat survey method. The results are as follows. (1) There were significant differences of the nebklas' morphological characteristics among the different habitats (p<0.01). The average height, bottom area, vertical and cross section and volume of the nebkhas were all the largest in the oasis, followed by the desert, and the last was the desert-oasis ecotone. (2)There was significant quadratic function relationship between the long axis and short axis of nebklas, but with different degree of correlation, the highest was in the desert-oasis ecotone with correlation coefficient value 0.78, while the lowest was in the oasis with correlation coefficient value 0.57. Typical power function relationships were existed between the height and bottom area, and also between the volume and height of the nebklas, the correlation coefficient values were all more than 0.59. (3) The nebklas in the desert-oasis ecotone was presented clustered distribution with much higher distribution density, while in the oasis and the desert area nebklas showed random distribution with lower distribution density.

Key words： Minqin; desert-oasis ecotone; nebkhas; morphological feature

Cite this article

Zhang Jinhu , Tang Jinnian , Li Delu , Wei Linyuan , Man Duoqing , Chai Chengwu . Morphological Characteristics and Distribution Patterns of Nebkhas in Desert-oasis Ecotone[J]. Journal of Desert Research, 2015 , 35(5) : 1141 -1149 . DOI: 10.7522/j.issn.1000-694X.2015.00078

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