生物多样性 ›› 2016, Vol. 24 ›› Issue (8): 940-947. DOI: 10.17520/biods.2015349
王德艺1,2, 郝建锋1,*(), 李艳1, 齐锦秋1, 裴曾莉1, 黄雨佳1, 蒋倩1, 陈亚1
收稿日期:
2015-12-10
接受日期:
2015-12-10
出版日期:
2016-08-20
发布日期:
2016-09-02
通讯作者:
郝建锋
基金资助:
Deyi Wang1,2, Jianfeng Hao1,*(), Yan Li1, Jinqiu Qi1, Zengli Pei1, Yujia Huang1, Qian Jiang1, Ya Chen1
Received:
2015-12-10
Accepted:
2015-12-10
Online:
2016-08-20
Published:
2016-09-02
Contact:
Hao Jianfeng
摘要:
为研究人工林群落的边缘效应特征, 本文以川西周公山森林公园的柳杉(Cryptomeria fortunei)人工林破碎化大斑块为对象, 以植株平均胸径、平均高度、平均密度、丰富度指数(D)和Shannon-Wiener指数(H)来综合衡量边缘效应深度。在实地踏查的基础上, 从林缘向林内(梯度1至梯度5)设置5条样带(宽度为10 m), 在每条样带中设置4个10 m × 10 m的小样方进行调查。结果表明: (1)从物种组成上看, 在总面积为2,000 m2的20个小样方中共记录到111个物种, 隶属于54科96属, 物种数从林缘至林内递减。(2)从群落结构上看, 乔木层的平均胸径从林缘至林内呈减小趋势, 平均密度则相反, 平均高度无显著变化; 灌木层的平均密度从林缘向林内减小, 平均高度无显著变化; 草本层的平均密度和平均高度均呈减小趋势。(3)从物种多样性上看, 总体上各层次的丰富度指数和Shannon-Wiener指数均从林缘向林内呈减小趋势, 其中灌木层和草本层的变化趋势最明显; 同时, 林内各梯度与梯度1 (林缘)的共有种和相似性系数从林缘向林内递减。(4)分析各项群落特征发现, 平均高度、平均密度和相似性系数的数值在梯度2向梯度3过渡时的起伏变化最明显, 推断本研究中柳杉人工林斑块的边缘深度可达林内20 m。
王德艺, 郝建锋, 李艳, 齐锦秋, 裴曾莉, 黄雨佳, 蒋倩, 陈亚 (2016) 川西周公山柳杉人工林群落的边缘效应. 生物多样性, 24, 940-947. DOI: 10.17520/biods.2015349.
Deyi Wang, Jianfeng Hao, Yan Li, Jinqiu Qi, Zengli Pei, Yujia Huang, Qian Jiang, Ya Chen (2016) Examination of edge effects in a Cryptomeria fortunei plantation in Zhougong Mountain, western Sichuan. Biodiversity Science, 24, 940-947. DOI: 10.17520/biods.2015349.
图3 不同边缘梯度下周公山柳杉人工林乔木层的平均胸径(DBH)和平均高度(H) (平均值±标准差)。不同小写字母表示梯度间差异显著(P < 0.05)。
Fig. 3 The average diameter at breast height (DBH) and average height (H) in the tree layer of Cryptomeria fortunei plantation of different edge gradients (mean ± SD). Different small letters mean significant difference at 0.05 level among gradients.
图4 不同边缘梯度下柳杉人工林灌木层和草本层的平均高度(平均值±标准差)。不同小写字母表示梯度间差异显著(P < 0.05)。
Fig. 4 The average height in shrub and herb layers of Cryptomeria fortunei plantation of different edge gradients. Different small letters mean significant difference at 0.05 level among gradients.
图5 不同边缘梯度下柳杉人工林不同层次的平均密度(平均值±标准差)。不同小写字母表示梯度间差异显著(P < 0.05)。
Fig. 5 The average density in different layers of Cryptomeria fortunei plantation of different edge gradients. Different small letters mean significant difference at 0.05 level among gradients.
图6 柳杉人工林各层次的丰富度指数(D)值和Shannon-Wiener指数(H) (平均值±标准差)。不同小写字母表示梯度间的D或H值差异显著(P < 0.05)。
Fig. 6 Richness index (D) and Shannon-Wiener index (H) in different layers of Cryptomeria fortunei plantation of different edge gradients. Different small letters mean significant difference of D (H) at 0.05 level among gradients.
两两边缘梯度之间 Between edge gradients | 梯度1-梯度2 Gradient 1-gradient 2 | 梯度2-梯度3 Gradient 2-gradient3 | 梯度3-梯度4 Gradient 3-gradient 4 | 梯度4-梯度5 Gradient 4-gradient 5 |
---|---|---|---|---|
共有种数 Number of common species | 45 | 34 | 27 | 31 |
相似性系数 Sørensen’s similarity coefficient | 0.69 | 0.60 | 0.54 | 0.67 |
表1 柳杉人工林毗邻的边缘梯度间的共有植物种数与Sørensen相似性系数
Table 1 The number of common species and Sørensen’s similarity coefficient between adjacent edge gradients in Cryptomeria fortunei plantation
两两边缘梯度之间 Between edge gradients | 梯度1-梯度2 Gradient 1-gradient 2 | 梯度2-梯度3 Gradient 2-gradient3 | 梯度3-梯度4 Gradient 3-gradient 4 | 梯度4-梯度5 Gradient 4-gradient 5 |
---|---|---|---|---|
共有种数 Number of common species | 45 | 34 | 27 | 31 |
相似性系数 Sørensen’s similarity coefficient | 0.69 | 0.60 | 0.54 | 0.67 |
两两边缘梯度之间 Between edge gradients | 梯度1-梯度2 Gradient 1-gradient 2 | 梯度1-梯度3 Gradient 1-gradient 3 | 梯度1-梯度4 Gradient 1-gradient 4 | 梯度1-梯度5 Gradient 1-gradient 5 |
---|---|---|---|---|
共有种数 Number of common species | 45 | 35 | 29 | 30 |
相似性系数 Sørensen’s similarity coefficient | 0.69 | 0.56 | 0.50 | 0.52 |
表2 柳杉人工林其他边缘梯度与梯度1的共有植物种数与Sørensen相似性系数
Table 2 The number of common species and Sørensen’s similarity coefficient between gradient 1 and the other edge gradients in Cryptomeria fortunei plantation
两两边缘梯度之间 Between edge gradients | 梯度1-梯度2 Gradient 1-gradient 2 | 梯度1-梯度3 Gradient 1-gradient 3 | 梯度1-梯度4 Gradient 1-gradient 4 | 梯度1-梯度5 Gradient 1-gradient 5 |
---|---|---|---|---|
共有种数 Number of common species | 45 | 35 | 29 | 30 |
相似性系数 Sørensen’s similarity coefficient | 0.69 | 0.56 | 0.50 | 0.52 |
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