凉水保护区红松与主要伴生树种的空间关系  

Exploring spatial relationship between Pinus koraiensis and major associated tree species in Liangshui National Nature Reserve

作　　者：游晨露 国庆喜[1] YOU Chenlu;GUO Qingxi(Center for Ecological Research,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学生态研究中心,哈尔滨150040

出　　处：《生态学报》2024年第7期3072-3085,共14页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(31210103911)。

摘　　要：空间关系是影响森林生长与群落演替的重要因素,种间关系是其重要组成部分,研究空间关系有利于了解森林群落的生长更新、功能作用与演替进程。利用移动窗口法对凉水自然保护区10.4 hm^(2)样地不同径级的红松与主要伴生树种做空间相关性研究,并进行多尺度比较,得到不同尺度下不同径级红松与主要伴生树种个体的空间关系特征。研究结果表明:(1)红松与伴生树种的相互关系复杂多样,多种相互关系并存,表现出阔叶红松林群落结构的复杂性与稳定性。大径级红松压制同径级伴生树种,二者呈极显著负相关,但其对小径级伴生树种有庇荫作用,二者呈极显著正相关。(2)红松与主要伴生树种的相互关系在不同尺度、径级上均有极显著差异。尺度越大,红松与主要伴生树种的相关系数变化速率越小;伴生树种的径级越大,红松与主要伴生树种的相关系数变化速率越大。(3)红松与伴生树种的相关性具有尺度特征,主要表现在大尺度(≥60 m)范围上,在小尺度(<60 m)上相关性较弱。红松与伴生树种在相同径级与不同径级的结合方式上表现出不同的空间关系。同径级的红松与伴生树的种间关系多表现为负相关,不同径级的红松与伴生树种种间关系多表现为正相关。(4)以种间关系确定样方最小面积,凉水保护区临界样地面积为60 m×60 m。该研究集中于不同尺度下不同径级的红松与伴生树种的种间关系,解释优势种红松与伴生树种在森林的空间关系以及群落结构特征,为东北地区阔叶红松林的森林管理提供参考意见。Spatial relationships are important factors affecting forest growth and community succession,and interspecific relationships are important components of it.The study of spatial relationships helps to understand the growth,functional roles,and successional processes of forest communities.The correlation of interspecific relationships is easily influenced by sample size and the number of samples taken.Existing studies often use either small sample sizes with a large number of samples or large sample sizes with a small number of samples to ensure accuracy.Conducting multi-scale studies with a large number of samples can be difficult for data analysis.This study avoids these limitations by using the moving window method and combining it with Pearson correlation coefficient to analyze the interactions and variations between different diameter classes of Pinus koraiensis and associated tree species at different scales in the Liangshui National Nature Reserve(10.4 hm^(2)sampling plot)in Heilongjiang Province,and to conduct multi⁃scale comparisons.The study obtains the spatial relationship characteristics of Pinus koraiensis and main associated tree species at different scales and different diameter classes,explores the interaction mechanisms between Pinus koraiensis and associated tree species,helps to understand the ecological adaptability and dynamic changes of Pinus koraiensis in communities,and reveals the selection and adaptation mechanisms of dominant tree species Pinus koraiensis to habitats,providing references for the better protection of Pinus koraiensis forests.The results show that:(1)the mutual relationships between Pinus koraiensis and associated tree species are diverse and exhibit multiple coexisting relationships,demonstrating the complexity and stability of the broad⁃leaved Pinus koraiensis forest community structure.Large size⁃class Pinus koraiensis suppresses associated tree species of the same size class,showing a highly significantly negative correlation,while they provide shade for small siz

关 键 词：红松 伴生树种 种间关系 径级 尺度 

分 类 号：S718.5[农业科学—林学]