喀纳斯泰加林群落火成演替中草本层与林冠层物种的连锁关系  

Linkage between Herbaceous Layer and Overstorey Species along the Pyrogenic Successions in Kanas Taiga Communities

作　　者：郭珂 潘存德[1] 余戈壁 李贵华 张帆 邹卓颖 刘博[1] Guo Ke;Pan Cunde;Yu Gebi;Li Guihua;Zhang Fan;Zou Zhuoying;Liu Bo(College of Forestry and Horticulture,Xinjiang Agricultural University,Urumqi 830052;Kanas National Nature Reserves,Buerjin 836600;Xinjiang Forestry and Grassland Bureau,Urumqi 830000)

机构地区：[1]新疆农业大学林学与园艺学院,乌鲁木齐830052 [2]喀纳斯国家自然保护区,布尔津836600 [3]新疆林业和草原局,乌鲁木齐830000

出　　处：《林业科学》2021年第4期1-13,共13页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(31570634);新疆自治区财政林业科技项目(新林科字〔2016〕599号-30)。

摘　　要：【目的】检验喀纳斯泰加林群落火成演替中草本层与林冠层物种的连锁关系,并探索其形成机制。【方法】以新疆喀纳斯国家级自然保护区内未受人为干扰的可识别的泰加林火成演替群落为对象,基于369个森林样地及其历史火干扰时间和火烈度调查,以环境、火干扰和林分因子为解释变量,草本层和林冠层物种多样性指数为响应变量,分别进行典范对应分析(CCA),并对草本层和林冠层的CCA排序第一轴得分值进行相关分析,探讨不同烈度火干扰后草本层与林冠层物种的连锁关系和随演替阶段的变化及其原因。【结果】1)火成演替群落的草本层与林冠层CCA排序第一轴得分值之间的相关性,在弱烈度和中烈度火干扰后达到显著水平(P=0.017<0.05,P=0.043<0.05),在强烈度火干扰后未达到显著水平(P=0.093>0.05);2)在强烈度火干扰后,火成演替群落的草本层与林冠层CCA排序第一轴得分值之间的相关性在演替前期达到显著水平(P=0.044<0.05),在演替中期和后期达到极显著水平(P=0.008<0.01,P=0.006<0.01);中烈度火干扰后,相应得分值的相关性在演替前期达到显著水平(P=0.043<0.05),在演替中期和后期达到极显著水平(P=0.006<0.01,P=0.004<0.01);弱烈度火干扰后,相应得分值的相关性在不同演替阶段均达到极显著水平(P=0.006<0.01,P=0.005<0.01,P=0.002<0.01);3)草本层和林冠层具有一致性响应且达到显著水平的因子,在强烈度火干扰后的演替前期、中期和后期分别有1、2和4个,在中烈度和弱烈度则均为3、4和5个。【结论】火干扰后,泰加林群落演替过程中的草本层与林冠层物种之间存在连锁关系,其原因可能是草本层和林冠层物种多样性格局对相同环境梯度的响应具有一致性。该连锁关系随火烈度增强而从强到弱,且随演替向前发展变得更加紧密。【Objective】The aim of this study is to test the linkage between herbaceous layer and overstorey species along the pyrogenic successions in Kanas taiga communities and to reveal its the formation mechanism.【Method】Community characteristics,i.e.,fire time,fire severity,stand factors and environmental factors,of 369 samples of the identifiable unhuman-disturbed pyrogenic succession communities were investigated in Kanas taiga,Xinjiang,China.Then,the canonical correspondence analysis(CCA)and correlation analysis were performed to analyze the linkage between herbaceous layer and overstorey species.【Result】The correlation in the first axis score of CCA between herbaceous layer and overstorey reached a significant level after low-severity fire and moderate-severity fires(P=0.017<0.05,P=0.043<0.05),but it did not reach a significant level after high-severity fire(P=0.093>0.05).After high-severity fire,the correlation in the first axis score of CCA between herbaceous layer and overstorey reached a significant level in early succession stage(P=0.044<0.05),whereas reached a highly significant level in the middle and late succession stages(P=0.008<0.01,P=0.006<0.01).After moderate-severity fire,the correlation of the first axis score of CCA between herbaceous layer and overstorey reached a significant level in early succession stage(P=0.043<0.05),whereas reached a highly significant level in the middle and late succession stages(P=0.006<0.01,P=0.004<0.01).After the interference of low-intensity fire,there was the highly significant correlation in the first axis score of CCA between herbaceous layer and overstorey across all succession stages(P=0.006<0.01,P=0.005<0.01,P=0.002<0.01).The results of CCA showed that the number of same explanatory variables between herbaceous layer and overstorey(i.e.,fire time,fire severity,stand factors and environmental factors)with the significant influences on response variables(i.e.,species diversity of herbaceous and canopy layers)were 1,2 and 4 in early,middle and late successi

关 键 词：泰加林 火干扰 林冠层 草本层 物种 连锁关系 

分 类 号：S718.54[农业科学—林学]