生境隔离作用对喀斯特季节性雨林群落树种空间格局的影响

李冬兴<sup>1; 2</sup>; 向悟生<sup>1; 2</sup>; 丁 涛<sup>1; 2</sup>; 王登惠<sup>1</sup>; 农正权<sup>2; 3</sup>; 龙继凤<sup>2; 3</sup>; 郭屹立<sup>1; 2</sup>; 李先琨<sup>1; 2</sup>; 王 斌<sup>1; 2*</sup>

引用本文:	李冬兴, 向悟生, 丁涛, 王登惠, 农正权, 龙继凤, 郭屹立, 李先琨, 王斌.生境隔离作用对喀斯特季节性雨林群落树种空间格局的影响[J].广西植物,2025,45(6):991-1005.[点击复制]
	LI Dongxing, XIANG Wusheng, DING Tao, WANG Denghui, NONG Zhengquan, LONG Jifeng, GUO Yili, LI Xiankun, WANG Bin.Effects of habitat segregation on spatial patterns of tree species in karst seasonal rainforest communities, Guangxi, South China[J].Guihaia,2025,45(6):991-1005.[点击复制]

【打印本页】【下载PDF全文】【查看/发表评论】【下载PDF阅读器】【关闭】

←前一篇|后一篇→

过刊浏览高级检索

本文已被：浏览 382次下载 145次	码上扫一扫！
分享到：微信更多字体:加大+\|默认\|缩小-
生境隔离作用对喀斯特季节性雨林群落树种空间格局的影响
李冬兴^1,2, 向悟生^1,2, 丁涛^1,2, 王登惠¹, 农正权^2,3, 龙继凤^2,3, 郭屹立^1,2, 李先琨^1,2, 王斌^1,2*
1. 广西壮族自治区中国科学院广西植物研究所, 广西喀斯特植物保育与恢复生态学重点实验室, 广西桂林 541006;2. 弄岗喀斯特生态系统广西野外科学观测研究站, 广西崇左 532499;3. 崇左市广西弄岗国家级自然保护区管理中心, 广西崇左 532499

摘要:

森林群落内强烈生境异质性可能会驱动不同树种间形成空间隔离,从而塑造出与局域复杂生境相适应的群落树种空间结构。该文以广西喀斯特季节性雨林中具有不同生境异质性强烈程度的3个典型森林群落1 hm²样地为研究对象,通过分析主要树种的种内空间分布格局和种间关联格局来量化群落树种空间结构,检测其对喀斯特局域生境隔离作用的响应规律。结果表明:(1)3个森林群落树种的空间分布格局整体上以中小尺度聚集分布为主,在较小尺度(0～13 m)上聚集分布比例为85%,在中尺度(13～30 m)上逐步降低至60%,在较大尺度(>30 m)上降低至20%以下; 随着生境异质性强烈程度的增加,群落内中小尺度种内聚集分布的比例逐步增加,平均值分别为63.1%、89.5%、94.4%。(2)3个森林群落树种的种间关联格局整体上以空间隔离和部分重叠为主; 在小尺度(0～3 m)上二者共占50%,在中小尺度(3～20 m)上占70%,在较大尺度(>20 m)上逐步降低至40%; 随着生境异质性强烈程度增加,群落中小尺度种间空间隔离和部分重叠的比例逐步增加,平均值分别为60.4%、70.2%、83.7%。综上结果表明,强烈的局域喀斯特生境异质性会增加群落树种的种内聚集分布强度,提高群落不同树种之间产生空间隔离的概率,说明局域复杂生境的隔离作用是塑造喀斯特森林群落树种空间结构的重要因素。该研究强调,在喀斯特石漠化区域进行植被生态恢复时,需充分评估不同地段生境条件,并参考相应原生境森林群落来配置树种及其空间组合。

关键词: 种间关联, 空间隔离, 生境异质性, 扩散限制, 双关联函数

DOI：10.11931/guihaia.gxzw202503027

分类号:Q948

文章编号:1000-3142(2025)06-0991-15

基金项目:弄岗喀斯特生态系统广西野外科学观测研究站科研能力建设项目(桂科23-026-273); 国家自然科学基金(32260276, 32360281); 广西植物研究所基本业务费(桂植业23014)。

Effects of habitat segregation on spatial patterns of tree species in karst seasonal rainforest communities, Guangxi, South China

LI Dongxing^1,2, XIANG Wusheng^1,2, DING Tao^1,2, WANG Denghui¹, NONG Zhengquan^2,3, LONG Jifeng^2,3, GUO Yili^1,2, LI Xiankun^1,2, WANG Bin^1,2*

1. Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China;2. Nonggang Karst Ecosystem Observation and Research Station of Guangxi, Chongzuo 532499, Guangxi, China;3. Administration Center of Guangxi Nonggang National Nature Reserve, Chongzuo 532499, Guangxi, China 1. Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, Guangxi, China; 2. Nonggang Karst Ecosystem Observation and Research Station of Guangxi, Chongzuo 532499, Guangxi, China; 3. Administration Center of Guangxi Nonggang National Nature Reserve, Chongzuo 532499, Guangxi, China

Abstract:

Spatial segregation among tree species in forest communities may be driven by strong habitat heterogeneity, thereby shaping the tree species spatial structures that adapt to local complex habitats. Based on three 1 hm² forest plots with varying habitat heterogeneity in Guangxi karst seasonal rainforests, this study quantified community tree species spatial structures by analyzing intraspecific spatial patterns and interspecific associations of dominant species, testing their responses to karst habitat segregation. The results were as follows:(1)Across all communities, tree species exhibited primarily small- and medium-scale aggregations. On small scale(0-13 m), 85% of species showed aggregated distributions, which progressively decreased to 60% on medium scale(13-30 m). On larger scale(>30 m), random and regular distributions dominated(>80%). As topographic complexity increased among plots, the proportion of small- and medium-scale intraspecific aggregations mean values of aggregated distributions were 63.1%, 89.5%, 94.4%, respectively.(2)Interspecific associations were predominantly spatial segregation and partial overlap. On small scale(0-3 m), such associations accounted for 50%, increased to 70% on small-medium scale(3-20 m)and declined to 40% on larger scale(>20 m). Higher topographic complexity correlated with increased small- and medium-scale spatial segregations and partial overlap mean values were 60.4%, 70.2%, and 83.7%, respectively. These findings suggest that strong karst habitat heterogeneity enhances intraspecific aggregation and promotes the probability of spatial segregation among different tree species, implying that the isolation effect of localized complex habitats is a key driver factor shaping community spatial structure of tree species in karst forest communties. This study underscores the need to evaluate local habitat conditions and design species configurations mimicking natural karst forest communities in rocky desertification restoration efforts.

Key words: interspecific association, spatial segregation, habitat heterogeneity, dispersal limitation, pair-correlation function