生物多样性 ›› 2025, Vol. 33 ›› Issue (2): 24271. DOI: 10.17520/biods.2024271 cstr: 32101.14.biods.2024271
王凤琼1,#, 张心怡1,#, 王鑫厅1,*(), 姜超2, 侯亚丽3, 包道日娜3
收稿日期:
2024-06-28
接受日期:
2024-11-24
出版日期:
2025-02-20
发布日期:
2025-03-19
通讯作者:
*E-mail: 作者简介:
#共同第一作者
基金资助:
Wang Fengqiong1,#, Zhang Xinyi1,#, Wang Xinting1,*(), Jiang Chao2, Hou Yali3, Bao Daorina3
Received:
2024-06-28
Accepted:
2024-11-24
Online:
2025-02-20
Published:
2025-03-19
Contact:
*E-mail: About author:
#Co-first authors
Supported by:
摘要: 植物种群空间格局是植物生态学研究的基本内容之一。由于长期过度放牧, 内蒙古典型草原退化严重, 未受放牧干扰的原生群落非常罕见。探讨原生群落的种群空间格局对于草原的利用和保护具有重要的生态学意义。羊草(Leymus chinensis)草原是典型草原区广泛分布的主要群落类型之一, 1979年中国科学院草原生态系统定位研究站在内蒙古锡林郭勒盟典型草原地带建立的围栏封育羊草样地, 是目前保存完整的羊草草原原生群落。本研究选择羊草草原的原生群落和长期过度放牧的干扰群落, 应用成对相关函数结合均质泊松模型和异质泊松模型分析了羊草种群的空间分布格局。结果表明: (1)在原生群落中, 羊草种群表现出两种分布格局, 即在小尺度范围内呈聚集分布, 而在较大尺度范围内呈随机分布; 在长期过度放牧的干扰群落中, 羊草种群呈聚集分布格局, 这种变化是由于放牧引起的生境异质性所致; (2)羊草种群格局的聚集强度, 在排除生境异质性的影响后, 在小尺度范围内长期过度放牧群落高于原生群落, 这是由放牧胁迫下物种个体间的正相互作用引起的。
王凤琼, 张心怡, 王鑫厅, 姜超, 侯亚丽, 包道日娜 (2025) 羊草草原原生群落羊草种群点格局分析. 生物多样性, 33, 24271. DOI: 10.17520/biods.2024271.
Wang Fengqiong, Zhang Xinyi, Wang Xinting, Jiang Chao, Hou Yali, Bao Daorina (2025) Point pattern analysis of Leymus chinensis population in primary L. chinensis community in the steppe ecosystem. Biodiversity Science, 33, 24271. DOI: 10.17520/biods.2024271.
图1 羊草草原原生群落中羊草种群的点格局分析。A: 均质泊松模型; B: 异质泊松模型; 1、2和3分别指每个重复取样; w: 3个重复取样的加权平均点格局。
Fig. 1 Point pattern analysis of Leymus chinensis population in the primary L. chinensis community. A, Homogeneous Poisson process; B, Heterogeneous Poisson process; 1, 2 and 3 refer to each replicate; w, The weighted average point pattern based on three replicates.
图2 羊草草原放牧群落中羊草种群的点格局分析。A: 均质泊松模型; B: 异质泊松模型; 1、2和3分别指每个重复取样; w: 3个重复取样的加权平均点格局。
Fig. 2 Point pattern analysis of Leymus chinensis population in the grazed L. chinensis community. A, Homogeneous Poisson process; B, Heterogeneous Poisson process; 1, 2 and 3 refer to each replicate; w, The weighted average point pattern based on three replicates.
图3 羊草草原原生群落中羊草种群的聚集强度。A: 均质泊松模型; B: 异质泊松模型; 1、2和3分别指每个重复取样; w: 3个重复取样的加权平均数据。
Fig. 3 Aggregation effect of Leymus chinensis population in the primary L. chinensis community. A, Homogeneous Poisson process; B, Heterogeneous Poisson process; 1, 2 and 3 refer to each replicate; w, The weighted average data based on three replicates.
图4 羊草草原放牧群落中羊草种群的聚集强度。A: 均质泊松模型; B: 异质泊松模型; 1、2和3分别指每个重复取样; w: 3个重复取样的加权平均数据。
Fig. 4 Aggregation effect of Leymus chinensis population in the grazed L. chinensis community. A, Homogeneous Poisson process; B, Heterogeneous Poisson process; 1, 2 and 3 refer to each replicate; w, The weighted average data based on three replicates.
图5 原生群落与放牧群落中羊草种群聚集强度的比较。A: 均质泊松模型; B: 异质泊松模型。数据基于3个重复取样的加权平均获得。
Fig. 5 Aggregation effect of L. chinensis population in the primary vs. grazed community. A, Homogeneous Poisson process; B, Heterogeneous Poisson process. Data are expressed as (g(r) - CL)/CL by the weighted g(r) function analysis.
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