冰雪灾害对粤北杉木林生物多样性的影响  

Impact of Ice-snow Damage on Understory Biodiversity in a Cunninghamia lanceolata Stand in Northern Guangdong Province,China

作　　者：侯晓丽[1] 薛立[1] 

机构地区：[1]华南农业大学林学院,广东广州510642

出　　处：《西南林业大学学报（自然科学）》2016年第5期89-94,共6页Journal of Southwest Forestry University：Natural Sciences

基　　金：中央财政林业科技推广示范项目(2015-GDTK-OT)资助;广东省省级科技计划项目(2015B090904008)资助

摘　　要：为更好地了解冰雪灾害对森林群落结构和组成的影响,于2011年调查了粤北1个杉木林的5个大林窗(80~100 m^2),5个小林窗(30~40 m^2)和郁闭样地的林下植物。在大林窗、小林窗和郁闭样地分别有3、4和3种灌木和7,10和5种草本;郁闭样地、小林窗、大林窗灌木层的Shannon-Wiener多样性指数分别为1.01、1.09和0.95,Shannon多样性指数分别为0.61、0.60和0.57,均匀度指数JSW分别为0.91、0.79和0.87,均匀度指数JSi分别为0.92、0.80和0.86;而草本层的Shannon-Wiener多样性指数分别为1.42、1.92和1.37,Shannon多样性指数分别为0.64、0.95和0.71,均匀度指数JSW分别为0.73、0.84和0.85,均匀度指数JSi分别为0.74、1.05和0.88。总体来看,大林窗光照过强,不利于荫生植物生存,故多样性指数低;小林窗条件下空间异质性较大,林下植被的多样性指数也较高。In order to better understand the structure and composition of forest communities suffering from snow damage, understory species were investigated in 2011 at five large （ 80-100 m2 ） , five small （ 30-40 m2 ） canopy sites in the Cunninghamia lanceolata stand, showing that there were 3, 4 and 3 shrub species and 7, lee- and 10 and 5 herbaceous species in the lager gaps, small gaps and canopy sites, respectively. Shannon-Weiner diversity in- dex was 1. 01 , 1.09 and 0. 95, Simpson diversity index was 0. 61 , 0. 60 and 0. 57, Pielou （Jsw） evenness index was 0. 91, 0. 79 and 0. 87, and Pielou （Jsi） evenness index was 0. 92,0. 80 and 0. 86 in shrub layer, respective- ly, in the controls, small gaps and large gaps. Whereas Shannon-Weiner diversity index was 1.42, 1.92 and 1.37, Simpson diversity index was 0. 64, 0. 95 and 0. 71 , Pielou （Jsw） evenness index was 0. 73, 0. 84 and 0. 85 and Pielou （Jsi） evenness index was 0.74, 1.05 and 0. 88 in herbaceous layer, respectively, in the controls, small gaps and large gaps. Generally, diversity index was low in large gaps due to strong illumination and high in small gaps due to large spatial heterogeneity.

关 键 词：生物多样性 杉木 冰雪灾害 林下植物 

分 类 号：S718[农业科学—林学]