生态学报2017，Vol.37Issue(6)：1939-1955,17.DOI:10.5846/stxb201510232148
不同郁闭度控制下马尾松(Pinus massoniana)人工林土壤动物群落特征
Community characteristics of soil fauna for different canopy density of a Pinus massoniana plantation
摘要
Abstract
Soil fauna is critical to the nutrient cycling,litter decomposition promoting and soil structure formation.The relationship between underground biota especially soil fauna and aboveground vegetation are beneficial to the forest ecosystem stability.Therefore,we studied the community structure of soil fauna in Pinus massoniana plantation controlled by different sized canopy density (proportion of the forest floor covered by the tree crowns' vertical projection:0.5,0.6,0.7,0.8,0.9).In October 2014,we used the hand picking up method,Tullgren funnel method and Baermann technique to collect macro,meso or micro soil fauna in the upper Yangtze River at Yibin.The results revealed that a total of 8860 individuals soil fauna were collected,belonging to 4 phyla,11 classes,25 orders and 111 families.These include 588 macro individuals with Blattidae,Neanuridae and Campodeidae as the dominant species and with omnivorus as the main feeding habit.Besides,the rest of 8271 individuals were meso or micro fauna with Isotomidae and Liacaridae as the dominant species,the feeding habits were mainly fungivorous forms and saprozoic.Meanwhile,the percentage of macro omnivorous soil fauna increased significantly in 0.9 canopy density and predators decreased conversely.Soil fauna of meso or micro sized predators increased significantly in 0.5-0.7 canopy density and then had no significant change along with canopy density.The proportion of meso or micro saprozoic soil fauna increased significantly with canopy density increasing but opposite trend we found for fungivorous forms.In addition,canopy density treatments only impacted on the number of macro soil fauna groups,which significant increase in 0.9.With increasing canopy density,all of the total individuals,little layer individuals and 5-10 cm layer groups number of soil meso or micro fauna increased (0.5-0.7) and subsequently decreased (0.7-0.9) significantly.The total group number of meso or micro soil fauna increased in 0.5-0.6 canopy density.In litter layer the group number of meso or micro soil fauna also increased in 0.5-0.8 significantly and 0.8-0.9 decreased.We had also take diversity feature into consideration.The diversity value of macro,meso or micro soil fauna were significantly different with soil layer.Following the canopy density increased,the value of Simpson index of meso or micro soil fauna decreased although the Shannon-Wiener index and Pielou index were significantly increased.Simultaneously the Margalef abundance index were significantly higher firstly (0.5-0.6) and decreased (0.6-0.9) subsequently.Furthermore,macro soil fauna Jaccard similarity coefficient is lower than the meso or micro sized.Finally,the CCA (canonical correlation analysis) results showed that different response to environmental factors for different groups of soil fauna.Canopy density,moisture content,organic matter and total phosphorus have significant effects on these groups.So based on our research,we proposed that Pinus massoniana plantation with 0.7 canopy density has relatively abundant soil fauna diversity and stable community.关键词
马尾松人工林/郁闭度/土壤动物/群落结构Key words
Pinus massoniana plantation/canopy density/soil fauna/community structure引用本文复制引用
周泓杨,张健,张丹桔,张捷,魏大平,赵燕波,赵波,李川北..不同郁闭度控制下马尾松(Pinus massoniana)人工林土壤动物群落特征[J].生态学报,2017,37(6):1939-1955,17.基金项目
国家自然科学基金项目(31370628) （31370628）
国家科技支撑计划项目(2011BAC09B05) （2011BAC09B05）
四川省科技支撑计划项目(12ZC0017) （12ZC0017）
四川省科技厅应用基础项目(2012JY0047) （2012JY0047）
四川省教育厅科技创新团队计划项目(11TD006) （11TD006）
