热带森林片段面积对林下节肢动物多样性的影响  

Patch size matters for arthropod composition and diversity in fragmented tropical forests

作　　者：马占霞 甘建民[1] 张玲 MA Zhan-xia;GAN Jian-min;ZHANG Ling(Key Laboratory of Tropical Forest Ecology, Xishaungbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, Yunnan, China;University of Chinese Academy of Sciences, Beijing 100049, China）.)

机构地区：[1]中国科学院西双版纳热带植物园热带森林生态学重点实验室,云南勐仑666303 [2]中国科学院大学,北京100049

出　　处：《生态学杂志》2018年第7期2051-2058,共8页Chinese Journal of Ecology

基　　金：云南省应用基础研究项目(2016FA017);中国科学院"一三五"专项(XTBG-T03);中国科学院科技服务网络计划(STS计划)项目(KFJ-EWSTS-084)资助

摘　　要：土地利用变化和栖息地丧失是生物多样性的最大威胁之一,热带森林是研究生物多样性的热点地区,但其破碎化程度日趋严峻。为揭示热带森林片段化对节肢动物多样性的影响,本研究以云南西双版纳纳板河流域9个不同面积的热带片段森林为对象,运用马氏网的方法,结合宏条形码技术调查了林下节肢动物的多样性和群落组成。结果表明:在9个片段森林中共得到347个OTUs,隶属18个分类群,其中大片段森林(面积≥50 hm2)中共有225个OTUs,中片段森林(10 hm2<面积<50 hm2)中有113个OTUs,小片段森林(面积≤10 hm2)中有139个OTUs。回归分析发现:片段森林面积大小对节肢动物物种丰富度有显著影响,但不同的节肢动物群落对片段面积的响应不同;大片段森林中的节肢动物beta多样性显著低于中、小片段森林的,而中、小片段森林之间的节肢动物beta多样性无显著差异。研究认为,该地区森林片段化面积对节肢动物多样性影响较大,大片段森林可以容纳更多的物种丰富度,但小面积片段森林仍然有其保护的价值。Land-use change and habitat loss are two top threats to biodiversity. Tropical forest is a hotspot for biodiversity but threatened by forest fragmentation. To explore the effects of forest fragmentation on arthropod diversity,we used metabarcoding to investigate the composition and diversity of arthropods underneath nine forest fragments in a rubber landscape matrix in Nabanhe Nature Reserve（ Xishuangbanna,SW China）. A total of 347 OTUs of 18 arthropod taxa were collected from nine forest fragments. There were 225 OTUs in large forest patches（ ≥50 hm～2 in size）,113 OTUs in medium forest patches（ 10-50 hm～2）,and 139 OTUs in the small forest patches（ ≤10 hm～2）,respectively. Forest patch size significantly affected arthropod richness,with the responses of different arthropod communities to forest patch sizes being varied. The beta diversity of arthropods in larger forest patches was significantly lower than that in smaller patches,whereas there was no significant difference in beta diversity of arthropods between the medium and small forest patches. Our results suggested that large forest patches in tropical regions had positive impacts on both composition and diversity of arthropod community,while small forest patches also deserves to be conserved.

关 键 词：森林片段化 节肢动物 物种多样性 beta多样性 宏条形码技术 

分 类 号：S718[农业科学—林学]