生物多样性 ›› 2011, Vol. 19 ›› Issue (2): 252-259. DOI: 10.3724/SP.J.1003.2011.08024
所属专题: 中国的森林生物多样性监测
祝燕1, 白帆1,2, 刘海丰1,3, 李文超1, 李亮1,2, 李广起1,2, 王顺忠1, 桑卫国1,*()
收稿日期:
2011-01-30
接受日期:
2011-03-25
出版日期:
2011-03-20
发布日期:
2011-06-01
通讯作者:
桑卫国
作者简介:
*E-mail: swg@ibcas.ac.cn基金资助:
Yan Zhu1, Fan Bai1,2, Haifeng Liu1,3, Wenchao Li1, Liang Li1,2, Guangqi Li1,2, Shunzhong Wang1, Weiguo Sang1,*()
Received:
2011-01-30
Accepted:
2011-03-25
Online:
2011-03-20
Published:
2011-06-01
Contact:
Weiguo Sang
摘要:
种群分布格局和种间空间关联性研究有助于深入理解物种共存机制。本研究在北京地区5个1 ha典型暖温带森林样地, 在0-50 m尺度范围内综合分析了常见种的种群分布格局及成年树种间的空间关联性。研究发现: (1)所有检验的物种都表现了聚集格局, 主要发生在较小(0-15 m)的尺度范围内, 并且同种聚集强度峰值普遍出现在目标个体周围1 m的距离内; 在>15 m的较大尺度上, 随着尺度增加, 随机和规则格局成为物种分布的主要形式; (2) 种间不相关联的比例高(~50%), 即使种间存在显著的关联性, 也是以隔离和部分重叠为主要的关联形式; 很少的物种对(~4%)呈混合分布。种子扩散限制和生境异质性在某种程度上解释了种群普遍聚集的格局, 种群聚集分布又促使种间分布不相关联, 或者种间呈现隔离和部分重叠格局, 反映了物种分布与生境存在紧密的关联性。另外, 种间隔离的格局会阻止种间个体相互竞争。然而, 由于同种个体聚集分布, 密度制约成为调节种群分布的主要形式。本结果将有助于揭示森林群落物种共存的潜在维持机制。
祝燕, 白帆, 刘海丰, 李文超, 李亮, 李广起, 王顺忠, 桑卫国 (2011) 北京暖温带次生林种群分布格局与种间空间关联性. 生物多样性, 19, 252-259. DOI: 10.3724/SP.J.1003.2011.08024.
Yan Zhu, Fan Bai, Haifeng Liu, Wenchao Li, Liang Li, Guangqi Li, Shunzhong Wang, Weiguo Sang (2011) Population distribution patterns and interspecific spatial associations in warm temperate secondary forests, Beijing. Biodiversity Science, 19, 252-259. DOI: 10.3724/SP.J.1003.2011.08024.
图1 物种分布格局示意图。 用199个完全随机模拟值的第五最高值和第五最低值构建置信区间(虚线), 每个分析尺度上的双关联函数g(r)实测值用实心圆表示。
Fig. 1 Examples for analyzing population distribution patterns. The confidence limits (dashed lines) were constructed from the 5th-lowest and 5th-highest g(r) values of 199 simulations of a null model of complete spatial randomness. The solid circles denote the pair-correlation functions of the observed data over scale r.
图2 种间空间关联性分析示意图。 分布图中, 黑点代表物种1的位置, 三角符号代表物种2的位置; Monte Carlo随机模拟199次, 模拟值的第五最高值和第五最低值构建置信区间(虚线), 实心圆代表实测值。
Fig. 2 Examples for analyzing interspecific associations. Black points indicate locations of species 1 and triangles indicate locations of species 2. Dashed lines give the simulation envelopes of the 5th-lowest and 5th-highest values of the 199 Monte Carlo simulations under a null model of complete spatial randomness, and solid circles show the observed values at scales r.
图3 检验的所有物种在不同尺度上表现聚集、随机和规则分布格局的比例
Fig. 3 Proportion of all tested species showing patterns of significant aggregation, randomness and regularity at scales r.
图4 种间不同关联类型的物种对比例。 (a)、(b)、(c)、(d)和(e)图分别代表每个样地分析的结果,(f)图是5个样地累计70个物种对的分析结果。
Fig. 4 Proportion of different interspecific spatial association types. (a), (b), (c), (d), and (e) are the results of each forest plot. (f) is the overall assessment of all 70 species pairs analyzed in five forest plots.
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