新疆农业科学2017，Vol.54Issue(11)：1961-1971,11.DOI:10.6048/j.issn.1001-4330.2017.11.001
火干扰烈度对喀纳斯针叶阔叶林主要植物种生态位的影响
Effects of Fire Severity on Niche of Main Species in the Coniferous Broad-leaved Forest in Kanas, Xinjiang
摘要
Abstract
[Objective] Through the analysis of niche transition under different fire severity in a coniferous broad-leaved forest in Kanas to explain the mechanism of succession of plant community fire disturbance from the niche perspective,this project aims to provide scientific basis for the Kanas taiga forest community species diversity conservation and sustainable forest management.[Method] In this paper,the value of ecological niche width and niche overlap of the main species in tree layer,shrub layer and herbaceous layer under different fire severity were quantitatively analyzed by the ecological niche width of Shannon-Wiener and the niche overlap of Pianka.[Result] The niche width of Pinus sibirica and Elymus sibiricus had significant differences (P ＜ 0.05) under different fire severity,the niche breadth of Betula pendula,Vaccinium hirtum,Cerastium pauciflorum and other nine main species had slight difference(P ＞ 0.05),the niche width of Larix sibirica,Lonicera caerulea,Carex polyphylla and other plants had significant difference (P ＜ 0.05) between any fire disturbance intensity and other two kinds of fire disturbance intensity.Tree layer niche overlap value of main plant species of forest community reached the maximum in mild fire disturbance intensity,but there was little difference between moderate fire disturbance intensity.The niche overlap values of main plant species in shrub layer and herb layer were the largest under moderate fire disturbance intensity.The species of niche overlap value more than 0.8 under the moderate fire disturbance intensity was the largest and the least under the weak fire severity.[Conclusion] Different natural fire severity can lead to the ecological niche change of the main species in the coniferous broad-leaved forest of the Kanas by the environment heterogeneity and it is also affected by the biological characteristics of plants.关键词
自然火干扰/火烈度/针叶阔叶林/植物种/生态位Key words
natural fire disturbance/fire severity/coniferous-broad-leaved forest/plant species/niche分类
农业科技引用本文复制引用
刘景,潘存德,余戈壁,李贵华,刘小菊,崔倩,杨玉萍..火干扰烈度对喀纳斯针叶阔叶林主要植物种生态位的影响[J].新疆农业科学,2017,54(11):1961-1971,11.基金项目
国家自然科学基金项目“喀纳斯泰加林火成演替草本层与林冠层关系研究”(31570634) （31570634）
新疆自治区财政林业科技项目“新疆山地森林更新演替与可持续经营研究”(新林科字[2016]599号-30) （新林科字[2016]599号-30）
The National Natural Science Foundation of China "Study on linkage between the herbaceous and overstory layer among pyrogenic succession in Taiga forests" (31570634) （31570634）
Financial forestry science and technology project of Xinjiang Uygar Autonomous Region "The succession and the sustainable development of mountain forests in the Xinjiang" (XLKZ [2016] No.599-30) （XLKZ [2016] No.599-30）
