Characteristics of Litter Migration in Habitat Units of Dunes in the Horqin Sandy Land

doi:10.7522/j.issn.1000-694X.2015.00009

JOURNAL OF DESERT RESEARCH ›› 2016, Vol. 36 ›› Issue (1): 167-173.DOI: 10.7522/j.issn.1000-694X.2015.00009

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Characteristics of Litter Migration in Habitat Units of Dunes in the Horqin Sandy Land

Wang Xinyuan^1,2, Zhao Xueyong¹, Li Yulin¹, Chen Xiangshun², Wang Xiaojun², Yun Jianying¹

1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. Ecological Environmental Supervision and Administration Bureau of Gansu Province, Lanzhou 730020, China

Received:2014-12-18 Revised:2015-01-15 Online:2016-01-20 Published:2016-01-20

Abstract

Abstract: Through the observation of litter migration flux among windward slope, top, leeward slope and inter-dune in different sand dunes, we analyzed the responses of litter migration to different habitats and sand dunes, and tried to explore the changes of litter migration for identifying the dynamics and allocation patterns of nutrients. The results showed that the process of litter migration was mainly observed during the non-growing seasons, coinciding with high litter production and strong wind. Litter migration flux varied markedly among the 4 habitat units in different sand dunes, being much higher at dune top and windward slope while much lower in the leeward slop and inter-dune. Additionally, there is a decreasing trend of the litter migration flux along the increase of height from the ground, and litter migration flux were significantly greater at height of 0-25 cm than at height of 25-50 cm, 50-75 cm and 75-100 cm. Whether in mobile dune, semi-fixed dune and fixed dune, there was a significant positive quadratic correlation between wind velocity and litter migration flux. In summary, the dynamic changes of litter migration flux were generally directly related to wind velocity.

Key words: Horqin Sandy Land, habitat units, wind velocity, litter migration flux

CLC Number:

:Q948.11

Wang Xinyuan, Zhao Xueyong, Li Yulin, Chen Xiangshun, Wang Xiaojun, Yun Jianying. Characteristics of Litter Migration in Habitat Units of Dunes in the Horqin Sandy Land[J]. JOURNAL OF DESERT RESEARCH, 2016, 36(1): 167-173.

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Characteristics of Litter Migration in Habitat Units of Dunes in the Horqin Sandy Land

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