南京林业大学学报（自然科学版）2024，Vol.48Issue(1)：155-160,6.DOI:10.12302/j.issn.1000-2006.202205035
乌兰布和沙漠两种植物的分布格局及其变化
Spatial distribution patterns and changes of Haloxylon ammodendron and Artemisia desertorum population in Ulan Buh Desert
摘要
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.关键词
梭梭/沙蒿/点格局变化/零模型/乌兰布和沙漠Key words
Haloxylon ammodendron/Artemisia desertorum/point pattern change/zero model/Ulan Buh Desert分类
生物科学引用本文复制引用
冯林艳,周火艳,赵晓迪..乌兰布和沙漠两种植物的分布格局及其变化[J].南京林业大学学报（自然科学版）,2024,48(1):155-160,6.基金项目
中央级公益性科研院所基本科研业务费专项(CAFYBB2022ZB002) （CAFYBB2022ZB002）
国家自然科学基金项目(31971653). （31971653）
