摘要
为探究森林冠层结构与林下光照的变化规律及其相关性,在河南省白云山国家森林公园选取人工林、择伐林、皆伐林和老龄林建立四块面积为1 hm^(2)(100 m×100 m)的固定监测样地,利用半球面影像技术获取冠层结构及林下光照数据。研究发现:1)随着人为干扰强度降低,冠层覆盖度与叶面积指数呈增加趋势,林下散射辐射与直接辐射呈减少趋势;2)择伐林冠层覆盖度与叶面积指数最大,平均叶倾角与透光比最小,林下光照(直接辐射、散射辐射)与冠层覆盖度和叶面积指数都呈显著负相关,林下散射辐射与冠层覆盖度和叶面积指数的负相关关系最强;3)处于不同干扰强度的群落由于冠层结构的差异,形成了不同群落内特定的光照环境。研究结果丰富了暖温带-亚热带生态过渡区森林冠层结构与林下光照动态变化研究资料,同时也为该区域森林的恢复与重建等提供科学的依据。
In order to explore the variation rule and correlation between forest canopy structure and understory light,four fixed monitoring sample plots with area of 1 hm^(2)(100 m×100 m)were selected in Baiyun Mountain National Forest Park,Henan province,including Artificial forest,Twice-cut forest,Once-cut forest and Undisturbed forest in this study.The data of canopy structure and understory illumination were obtained by hemispherical imaging.Results show that 1)with the intensity of man-made interference decrease,the canopy coverage and leaf area index increased,while the scattered radiation and direct radiation decreased.2)The canopy coverage and leaf area index of Twice-cut forest were the largest,but mean leaf angle and light transmittance were the smallest.The understory light(direct radiation and scattered radiation)were significantly negatively correlated with canopy coverage and leaf area index,while the understory scattered radiation had the strongest negative correlation with canopy coverage and leaf area index.3)Because of the difference of canopy structure,the communities in different man-made interference stages formed specific illumination environment in different communities.The results of this study enrich the research data of forest canopy structure and understory illumination dynamics in the transition zone of warm temperate-subtropical transition region,and provide scientific basis for forest restoration and reconstruction in this region.
作者
符强
王楠
肖曼
习靓靓
邵毅贞
贾宏汝
陈云
袁志良
叶永忠
FU Qiang;WANG Nan;XIAO Man;XI Jingjing;SHAO Yizhen;JIA Hongru;CHEN Yun;YUAN Zhiliang;YE Yongzhong(Henan Agricultural University,Zhengzhou 450002,China;Hean Finance University,Zhengzhou 450046,China;Field Scientific Observation and Research Station of Transitional Zone of South and North in the Funiu Mountains in Henan,Zhengzhou 450002,China)
出处
《生态学报》
CAS
CSCD
北大核心
2021年第19期7830-7837,共8页
Acta Ecologica Sinica
基金
河南农业大学青年英才项目(111/30500744)
河南省自然科学基金青年基金(212300410153)
河南省青年人才托举工程项目(2020HYTP037)
河南省基本科研业务费资助(2021JB02014)。
关键词
人为干扰
冠层结构
林下光照
干扰梯度
光照特征
man-made interference
canopy structure
understory lighting
disturbance gradient
illumination characteristic
