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Variations in leaf litter decomposition across contrasting forest stands and controlling factors at local scale

Journal of Plant Ecology 2015年第3期8卷 261-272页

作者： Juan Wang Yeming You Zuoxin Tang Shirong Liu Osbert Jianxin Sun College of Forest Science Beijing Forestry University35 Qinghua East RoadHaidianBeijing 100083China Institute of Forestry and Climate Change Research Beijing Forestry University35 Qinghua East RoadHaidianBeijing 100083China State Forestry Administration of China Key Laboratory of Forest Ecology and Environment Institute of Forest EcologyEnvironment and ProtectionChinese Academy of ForestryBeijing 100091China

Aims litter decomposition is a critical pathway linking the above-and belowground ***,factors underlying the local spatial variations in forest litter decomposition are still not fully *** investigated leaf litter decomposition across con-trasting forest stands in central China,with objective to determine the spatial variations and controlling factors in forest floor leaf lit-ter decomposition in relation to changes in forest stands in a tem-perate forest *** leaf litter decomposition was studied by using litterbag method across several typical forest stand types in baotianman Nature reserve,central China,including pure stands of Quercus aliena ***,*** *** and ***-abilis,respectively,and mixed pine/oak stands dominated by Pinus armandii and *** ***,as well as stands of pure *** *** trees ranging in stand age from~40 to>160 *** were made on litter mass remaining and changes in litter chemistry during decomposition over a 2-year period,along with data collections on selective biotic and environmental factors.a reciprocal transplant experiment involv-ing *** *** and *** was concurrently carried out to test the occurrence of‘home-field advantage(HFa)’in local forests when only considering contrasting oak tree *** analyses and path analyses were performed to identify the dominant drivers and their relative contributions to variations in leaf litter *** findingssignificant variations were found in the rate of leaf litter decomposi-tion among stands of different tree species but not among stand age *** values of decay constant,k,varied from 0.62 in *** *** stands to 0.56 in *** *** reciprocal litter transplant experiment showed that the rate of leaf litter decom-position was on average 5%slower in home-fields than on recipro-cal *** a

关键词： litter decomposition N retention oak forest path analysis reciprocal litter transplant

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