img

官方微信

高级检索

中国沙漠 ›› 2022, Vol. 42 ›› Issue (4): 89-98.DOI: 10.7522/j.issn.1000-694X.2021.00206

• • 上一篇    下一篇

沙丘生境沙鞭( Psammochloa villosa )种群空间分布格局

任珩1,2(), 赵文智1, 王志韬3, 赵江4   

  1. 1.中国科学院西北生态环境资源研究院 临泽内陆河流域研究站,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
    3.西北师范大学 地理与环境科学学院,甘肃 兰州 730070
    4.文县尖山小学,甘肃 文县 746400
  • 收稿日期:2021-10-09 修回日期:2021-11-26 出版日期:2022-07-20 发布日期:2022-08-29
  • 作者简介:任珩(1985—),男,甘肃陇南人,副研究员,主要从事克隆植物生态学和恢复生态学研究。E-mail: renheng@llas.ac.cn
  • 基金资助:
    国家自然科学基金项目(41907407)

Spatial pattern of Psammochloa villosa population in patch landscape in dune habitat

Heng Ren1,2(), Wenzhi Zhao1, Zhitao Wang3, Jiang Zhao4   

  1. 1.Linze Inland River Basin Research Station,Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.College of Geography and Environment Science,Northwest Normal University,Lanzhou 730070,China
    4.Jianshan Primary School of Wenxian County,Wenxian 746400,Gansu,China
  • Received:2021-10-09 Revised:2021-11-26 Online:2022-07-20 Published:2022-08-29

摘要:

种群空间分布格局是植物种群自身生物学特性与环境因素相互作用的结果,一直是生态学研究的热点。采用群落学调查与点格局分析方法,研究了不同沙丘生境下斑块植被沙鞭(Psammochloa villosa)种群的空间分布格局。结果表明:(1)沙鞭种群在不同沙丘生境下均存在聚集分布格局,聚集尺度表现出先减小后增大趋势;(2)沙鞭种群在半固定沙丘中2—37 cm尺度正向偏离泊松聚块模型,95—168 cm尺度负向偏离泊松聚块模型;(3)沙鞭种群在流动沙丘和固定沙丘符合嵌套双聚块模型,在半流动沙丘0—50 cm尺度负向偏离嵌套双聚块模型,在半固定沙丘0—3、98—105、110—123 cm和130—168 cm尺度负向偏离嵌套双聚块模型。斑块状分布和种内种间竞争是沙鞭种群空间分布格局发生转变的关键,确保斑块内部个体高度聚集,牺牲斑块外围个体是沙鞭种群空间布局和资源占据的生态适应策略之一。

关键词: 沙鞭(Psammochloa villosa), 空间分布格局, 沙丘生境, 繁殖策略, 巴丹吉林沙漠

Abstract:

The spatial distribution pattern of populations is the result of the interaction between the biological characteristics of plant populations and environmental factors, which has always been a hot spot of ecological research. Using the methods of community investigation and point pattern analysis, the spatial distribution patterns of Psammochloa villosa populations in patch landscape under different dune habitats were studied. The result shows:(1)Populations of P. villosa have a pattern of aggregation in different sand dune habitats, and the aggregation scale decreases first and then increases. (2) Populations of P. villosa in the semi-fixed dunes deviates from the poisson agglomeration model at the scale of 2-37 cm positively, and deviates from the Poisson agglomeration model at the scale of 95-168 cm negatively. (3)Populations of P.villosa in mobile dunes and fixed dunes are accordance with the nested double-cluster process, in semi-mobile dunes deviate from the nested dual-cluster model at the scale of 0-50 cm negatively, in semi-fixed dunes deviate from the nested double-cluster process at the scale of 0-3 cm, 98-105 cm, 110-123 cm and 130-168 cm scales negatively. Studies have shown that patchy distribution and intraspecific and interspecific competition are the key to the transformation of the spatial distribution pattern of P. villosa populations. Ensuring the high concentration of individuals within the patch and sacrificing the individuals outside the patch is one of the ecological adaptation strategies in the spatial layout and the resources occupancy of the P. villosa population.

Key words: Psammochloa villosa, spatial distribution pattern, sand dune habitat, reproduction strategy, Badain Jaran Desert

中图分类号: