Spatial Distribution Pattern and Intraspecific Association of Kobresia humilis in Perennial Artificial Grassland

doi:10.11733/j.issn.1007-0435.2022.02.001

Acta Agrestia Sinica ›› 2022, Vol. 30 ›› Issue (2): 253-258.DOI: 10.11733/j.issn.1007-0435.2022.02.001

Spatial Distribution Pattern and Intraspecific Association of Kobresia humilis in Perennial Artificial Grassland

XING Yun-fei¹, SHI Jian-jun^1,2,3, DE Ke-jia^1,2, WANG Wei^1,2, WANG Xiao-li^1,2, TANG Jun-wei⁴, LI Si-yao¹

1. Qinghai University/Qinghai Academy of Animal Science and Veterinary Medicine, Xining, Qinghai Province 810016, China;
2. Ministry of Education Key Laboratory for Alpine Grassland Ecology in the three-river-source region, Xining, Qinghai Province 810016, China;
3. Qinghai Provincial Key Laboratory of Adaptive Management on Alpine Grassland, Xining, Qinghai Province 810016, China;
4. Qinghai Provincial Grassland Management Station, Xining, Qinghai Province 810008, China

Received:2021-11-27 Revised:2022-01-11 Published:2022-03-10

多年生人工草地矮生嵩草(Kobresia humilis)种群空间格局与种内关联性

邢云飞¹, 施建军^1,2,3, 德科加^1,2, 王伟^1,2, 王晓丽^1,2, 唐俊伟⁴, 李思瑶¹

1. 青海大学/青海省畜牧兽医科学院, 青海西宁 810016;
2. 三江源区高寒草地生态教育部重点实验室, 青海西宁 810016;
3. 高寒草地适应性管理重点实验室, 青海西宁 810016;
4. 青海省草原总站, 青海西宁 810008

通讯作者: 施建军,E-mail:shjj0318@sina.com;德科加,E-mail:kjde512@aliyun.com
作者简介:邢云飞(1994-),男,汉族,河南周口人,博士研究生,主要从事高寒草地生态与环境研究,E-mail:874134458@qq.com
基金资助:
青海省高端创新人才千人计划(2019QHQRJH)；第二次青藏高原综合科学考察研究(2019QZKK1002)资助

Abstract

Abstract: Kobresia humilis is the dominant species in alpine meadows that has the characteristics of strong cold endurance,drought resistance,and grazing tolerance. K. humilis plays an important role in animal husbandry production,soil and water conservation,and ecological restoration. The spatial distribution pattern of plant population not only reflects the spatial distribution characteristics of plants but also helps to understand the status quo and viability of plant utilization resources. K. humilis was taken as the research object in this study. Three cluster degrees consisting of small patch degree cluster (0～30 cm²),middle patch degree cluster (30～80 cm²),large patch degree cluster (>80 cm²) were classified according to the individual cluster diameter. The spatial pattern and intraspecific association of K. humilis among different degree clusters were analyzed by adopting the method of point pattern analysis and the g-function statistic. The results showed that:the proportion of small patch degree clusters in the K. humilis population was higher than the proportions of the middle patch and large patch degree clusters. There were sufficient seedlings in the population and it was in a steady growth stage. The spatial pattern of the small patch,middle patch,and large patch degree clusters were firstly aggregated distribution and gradually transitioned to random distribution. The small patch,middle patch,and large patch degree clusters showed a positive correlation in a small scale. The patch aggregation distribution and mutualistic symbiosis are a survival strategy of K. humilis in perennial artificial grassland.

Key words: Kobresia humilis, Point pattern analysis, Spatial distribution pattern, Intraspecific association

摘要： 植物种群空间分布格局不仅反映植物的空间分布特点，还有助于研究者了解植物利用资源的现状和生存能力。本研究以矮生嵩草(Kobresia humilis)为研究对象，按株丛斑块面积将矮生嵩草分为小斑块级株丛(0～30 cm²)、中斑块级株丛(30～80 cm²)和大斑块级株丛(>80 cm²)3个株丛级，采用点格局分析的g函数统计方法，分析了矮生嵩草各级株丛的空间格局及关联性。结果表明：矮生嵩草种群中小斑块级株丛占比高于中斑块、大斑块级株丛占比，种群中幼苗充足，正处于稳定的增长阶段；矮生嵩草小斑块、中斑块、大斑块级株丛在小尺度范围内表现为聚集分布，随着尺度的增大，所有株丛斑块的聚集程度减弱，逐渐趋向于随机分布；小斑块与中斑块、大斑块的矮生嵩草株丛在小尺度内表现为正关联。斑块聚集分布和相互共存是矮生嵩草的一种生存策略。

关键词: 矮生嵩草, 点格局分析, 空间分布格局, 种内关联性

CLC Number:

S948.154

XING Yun-fei, SHI Jian-jun, DE Ke-jia, WANG Wei, WANG Xiao-li, TANG Jun-wei, LI Si-yao. Spatial Distribution Pattern and Intraspecific Association of Kobresia humilis in Perennial Artificial Grassland[J]. Acta Agrestia Sinica, 2022, 30(2): 253-258.

邢云飞, 施建军, 德科加, 王伟, 王晓丽, 唐俊伟, 李思瑶. 多年生人工草地矮生嵩草(Kobresia humilis)种群空间格局与种内关联性[J]. 草地学报, 2022, 30(2): 253-258.

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Spatial Distribution Pattern and Intraspecific Association of Kobresia humilis in Perennial Artificial Grassland

多年生人工草地矮生嵩草(Kobresia humilis)种群空间格局与种内关联性

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