抚育间伐对塞罕坝自然保护区人工林植被生态位特征和种间关联性的影响  

Effects of tending thinning on niche characteristics and interspecific association of plantations in Saihanba Nature Reserve

作　　者：李丹阳 吕宝磊 姜雨 马莉薇 LI Danyang;LüBaolei;JIANG Yu;MA Liwei(College of Forestry,Agricultural University of Hebei,Baoding 071000,China)

机构地区：[1]河北农业大学林学院,保定071000

出　　处：《干旱区资源与环境》2025年第1期139-149,共11页Journal of Arid Land Resources and Environment

基　　金：河北省2021年度引进留学人员资助项目(C20210365);河北省自然科学基金项目(C2021204002)资助。

摘　　要：文中以塞罕坝国家级自然保护区华北落叶松和樟子松人工纯林36块抚育间伐样地和12块未抚育间伐对照样地作为研究对象,基于2020年和2022年样地调查数据,利用Levins生态位宽度、Pianka生态位重叠度、AC和OI种间关联系数分析林下植被生态位特征和种间关联信息。结果显示:抚育间伐后,1)两种林分的草本植物的优势种群生态位宽度均下降,木本植物生态位宽度变化均不明显。2)华北落叶松林草本植物无生态位重叠种对减少,木本植物保持不变;樟子松林草本植物无生态位重叠种对增加,木本植物则减少。3)AC种间关联系数:华北落叶松林草本植物正负联结种对变化不明显,木本植物正联结种对增加,负联结种对减少,出现2对无联结种对;樟子松林木本与草本植物正负联结种对数量变化均不明显,草本植物显著联结种对减少,出现1组未连接种对。4)OI种间关联系数:华北落叶林木本与草本植物种对OI=0占比均保持不变,木本植物种对00占比增加。This article focuses on 36 thinning plots and 12 control plots without thinning of artificial pure forests of Larix gmelinii var.principis-rupprechtii and Pinus sylvestris var.mongolica in Saihanba National Nature Reserve.Using survey data from these plots collected in 2020 and 2022,we analyzed the ecological niche characteristics and interspecific association information of the understory vegetation by employing the Levins niche breadth,Pianka niche overlap,AC,and OI interspecific correlation coefficients.The results demonstrated that:1)the ecotope widths of dominant herbaceous plant populations in the two stands exhibited a decline trend,whereas the ecotope widths of woody plants did not undergo a notable change.2)In the L.gmelinii var.principis-rupprechtii forest,the number of herbaceous plants lacking ecotope overlap decreased,while the number of woody plants remained unchanged.In contrast,in the P.sylvestris var.mongolica forest,the number of herbaceous plants lacking ecotope overlap increased,while the number of woody plants lacking ecotope overlap decreased.3)According to the AC interspecific association coefficients,the positive and negative linkage pairs of herbaceous plants in L.gmelinii var.principis-rupprechtii forest did not change significantly.In contrast,the positive linkage pairs of woody plants increased,the negative linkage pairs decreased,and two pairs of unlinked pairs appeared.The number of positive and negative linkage pairs of woody and herbaceous plants in the P.sylvestris var.mongolica forest did not change significantly.Conversely,the number of significant linkage pairs of herbaceous plants decreased,and one group of unlinked pairs appeared.4)According to the OI interspecific correlation coefficients,the proportions of woody and herbaceous plant species pairs with OI=0 remained constant in L.gmelinii var.principis-rupprechtii forest,while the proportion of woody plant species pairs with 00 increased.

关 键 词：华北落叶松林 樟子松林 抚育间伐 生态位特征 种间关联性 

分 类 号：S718.5[农业科学—林学]