Spatial distribution patterns and changes of Haloxylon ammodendron and Artemisia desertorum population in Ulan Buh Desert

doi:10.12302/j.issn.1000-2006.202205035

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2024, Vol. 48 ›› Issue (1): 155-160.doi: 10.12302/j.issn.1000-2006.202205035

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Spatial distribution patterns and changes of Haloxylon ammodendron and Artemisia desertorum population in Ulan Buh Desert

FENG Linyan¹^,²(), ZHOU Huoyan¹^,³, ZHAO Xiaodi²^,^*()

1. Research Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
2. Research Institute of Forestry Policy and Information, Chinese Academy of Forestry, Beijing 100091, China
3. School of Ecology and Environment Science, Yunnan University, Kunming 650031, China

Received:2022-05-21 Revised:2022-10-18 Online:2024-01-30 Published:2024-01-24
Contact: ZHAO Xiaodi E-mail:1040857742@qq.com;zhaoxiaodi@caf.ac.cn

Abstract

Abstract:

【Objective】Haloxylon ammodendron and Artemisia desertorum are important sand-biding plants in the arid region of the northwest China. Studying the spatial distribution patterns of populations of these two species can help elucidate the population dynamics, which is of great significance to desertification control and vegetation restoration. 【Method】A 1 000 m × 1 000 m quadrat was set in the typical distribution area of H. ammodendron and A. desertorum communities in Ulan Buh Desert, where two in situ surveys were conducted in 2006 and again in 2019. Point pattern analysis was used to analyze the spatial distribution patterns, interspecific relationships, and dynamic changes in dominant desert species. 【Result】The results showed that the distribution pattern of A. desertorum changed from an aggregation distribution at a scale of 0-20 m to a random distribution at a scale of >10 m, and the intra-species correlation showed a weakening trend. The aggregation scale of H. ammodendron decreased further compared to that in 2006, indicating that the intra-species association of H. ammodendron shrubs was enhanced. In 2006, H. ammodendron -A. desertorum had a stronger dependence at different scales, with a significantly positive relationship at the 0-18 m scale. With an increase in scale, this positive relationship weakened and was characterized by an independent relationship. By 2019, the magnitude of the positive effect was reduced, and the positive effect was significant at 0-15 m. 【Conclusion】These results indicate that the inter-specific interaction scale between H. ammodendron and A. desertorum increased with time, and the competition relationship was intensified. If H. ammodendron and A. desertorum are planted in a cluster instead of uniformly distributed, the vegetation coverage rate is expected to be improved, resulting in enhanced function of desert ecosystems.

Key words: Haloxylon ammodendron, Artemisia desertorum, point pattern change, zero model, Ulan Buh Desert

CLC Number:

FENG Linyan, ZHOU Huoyan, ZHAO Xiaodi. Spatial distribution patterns and changes of Haloxylon ammodendron and Artemisia desertorum population in Ulan Buh Desert[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2024, 48(1): 155-160.

Figures/Tables 4

References 24

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Spatial distribution patterns and changes of Haloxylon ammodendron and Artemisia desertorum population in Ulan Buh Desert

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