Effects of Forest Gaps on Some Microclimate Variables in Castanopsis kawakamii Natural Forest  

作　　者：HE Zhongsheng LIU Jinfu WU Caiting ZHENG Shiqun HONG Wei SU Songjin WU Chengzhen 

机构地区：[1]College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,China [2]Key Laboratory of Fujian Universiaes for Ecology and Resource Statistics,Fuzhou 35o002,China

出　　处：《Journal of Mountain Science》2012年第5期706-714,共9页山地科学学报（英文）

基　　金：supported by the Key Program of Natural Science Foundation of Fujian Province of China (Grant No. 2008J0008);Doctoral Fund of Ministry of Education of China (Grant No.200803890011);China Postdoctoral Science Foundation (Grant No. 20070410796)

摘　　要：The objective of this study was to understand the effects of forest gap and variations in different seasons, gap size, locations and diurnal variations on forest microclimate and soil water content. Spatial and temporal distribution features oi air temperature （TA）, soil temperature （Ts）, relative humidity （h） and soil water content （ψ） were measured in Castanopsis kawakamii natural forest gaps created by a severe typhoon or fallen dead trees. The results showed that： （1） the variations of TA, h, and Tsin four seasons were extremely significant. The variations of ψ in four seasons were extremely significant except for those between spring and summer. （a） The diurnal variations of TA and Tswere expressed with a single peak curve. The diurnal variations of h and ψ presented a high-low-high trend （3） The variations of TA, h, and Ts were extremely significant among the large, medium and small gaps in C. kawakamii natural forest. Medium gaps had the highest TA and the lowest h while small gaps were jusl contrary to medium gaps. The variations of T were extremely significant for large, medium and small gaps except those between the medium and large gaps （4） The TA, h, Ts and ψ were decreased from the gap center, canopy gap, expanded gap to understory. These results will help further our understanding of the abiotic and consequent biotic responses to gaps in the mid-subtropical broadleaved forests, which also provide a theoretical basis for the scientific management and population restoration of C. kawakamii natural forest.

关 键 词：TA  air temperature Ts  soiltemperature h  relative humidity ψ  soil watercontent 

分 类 号：S718.512[农业科学—林学] S718.551.1