南盘江流域细叶云南松次生林群落主要木本种群的种间联结
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引用本文:朱德意,龙佳峰,李远发,廖良宁,叶绍明.南盘江流域细叶云南松次生林群落主要木本种群的种间联结[J].西北植物学报,2019,39(3):534~542
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作者单位
朱德意1,龙佳峰2,李远发1,廖良宁1,叶绍明1* (1 广西大学 林学院南宁5300042 广西壮族自治区林业勘测设计院南宁530011) 
基金项目:国家自然科学基金 (31400542,31460196);
中文摘要:该研究运用方差比率法、χ2检验、Pearson相关检验和Spearman轶相关检验,对广西雅长兰科植物国家级自然保护区南盘江流域的细叶云南松 (Pinus yunnanensis Franch. var. tenuifolia Cheng et Law) 次生林14个大树树种 (DBH ≥ 10 cm)、15个小树树种 (5 cm ≤ DBH < 10 cm) 和19个幼树树种 (1 cm ≤ DBH < 5 cm) 进行定量分析,以揭示南盘江流域细叶云南松次生林群落中木本种群的关联性及其更新演替规律,为桂西北细叶云南松林管理保护、干热河谷地区植被恢复和生态重建提供参考依据。结果表明:(1)研究区内细叶云南松林大树和小树的总体关联性表现为不显著负关联,幼树及群落总体表现为不显著正关联;χ2检验显示,大树和小树负关联种对占多数 (分别为48.35%和46.67%),幼树的正关联或负关联种对占比基本持平 (分别为40.35%和39.18%),群落整体无关联种对占比较大 (41.13%)。(2)Pearson相关系数和Spearman秩相关系数检验显示,细叶云南松林的大树、小树、幼树和群落总体均表现为负关联种对较多,正关联次之。(3)群落大树和小树物种在资源竞争上较激烈,结构不稳定;群落幼树物种适应了林下荫蔽环境,对光照要求较低,种间关系已具有较低的稳定性,个别物种表现出独立性。研究认为,南盘江流域细叶云南松次生林群落物种间存在一定的关联性,但未能形成稳定的配置关系,群落结构尚不稳定,仍处于演替早期阶段。
中文关键词:演替早期  次生林  种间联结  方差比率法  相关检验
 
Interspecific Association of Main Woody Populations in Secondary Forest Community of Pinus yunnanensis var. tenuifolia in Nanpan River Basin
Abstract:In this paper, a quantitative analysis of 14 large tree species (DBH ≥ 10 cm), 15 small tree species (5 cm ≤ DBH < 10 cm) and 19 saplings (1 cm ≤ DBH < 5 cm) in secondary forest of Pinus yunnanensis Franch. var. tenuifolia Cheng et Law, was carried out by methods of variance ratio test, χ2 test, Pearsons correlation coefficient test and Spearmans rank correlation coefficient test. The results showed that: (1) there was non significantly negative correlation of big trees or small trees, and non significantly positive correlation of saplings or the whole community. The results of χ2 test indicated that the proportion of positive correlation, negative correlation and non correlation for big trees, small trees, saplings and the whole community had different characteristics. For big trees and small trees, the negative correlated species pairs were in the majority (48.35% and 46.67%, respectively). The positive and negative correlated species pairs were basically the same for saplings (40.35% and 39.18%, respectively). For the whole community, the non correlated species pairs had the largest proportion (41.13%). (2) Pearsons correlation coefficient test and Spearmans rank correlation coefficient test revealed that there was largest proportion of negative correlation for big trees, small trees, saplings and the whole community. (3) There was intense competition in resources and unstable structure between big trees and small trees. Besides, the saplings adapted to the shaded environment under the canopy, and had lower requirements for light, thus had a relatively lower stability and even individual species show independence. On the whole, there is a certain correlation among species in the secondary forest community of P. yunnanensis var. tenuifolia in Nanpan River basin, yet still without the formation of stable allocation relationship. The community is still in the early stage of succession and its structure is still unstable. The results of this article can provide scientific reference such as the management and protection, sustainable management and utilization for secondary forest of P. yunnanensis var. tenuifolia, as well as vegetation restoration and ecological restoration in dry hot valley areas.
keywords:early succession  secondary forest  interspecific association  variance ratio test  correlation test
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