DOI: 10.1007/s10533-017-0353-6
Scopus记录号: 2-s2.0-85021837434
论文题名: Leaf litter diversity alters microbial activity, microbial abundances, and nutrient cycling in a subtropical forest ecosystem
作者: Pei Z. ; Leppert K.N. ; Eichenberg D. ; Bruelheide H. ; Niklaus P.A. ; Buscot F. ; Gutknecht J.L.M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 134, 期: 2018-01-02 起始页码: 163
结束页码: 181
语种: 英语
英文关键词: Enzyme activity
; Litter decomposition
; Litter diversity effects
; Microbial community composition
; Nitrogen mineralization rates
; Subtropical forest
Scopus关键词: abundance
; biomineralization
; community composition
; decomposition
; ecosystem function
; environmental conditions
; enzyme activity
; forest ecosystem
; fungus
; growth
; human activity
; leaf litter
; microbial activity
; nitrogen
; nutrient cycling
; soil microorganism
; species diversity
; species richness
; subtropical region
; tropical forest
; China
; Actinobacteria (class)
; Fungi
英文摘要: Human activities affect both tree species composition and diversity in forested ecosystems. This in turn alters the species diversity of plant litter and litter quality, which may have cascading effects on soil microbial communities and their functions for decomposition and nutrient cycling. We tested microbial responses to litter species diversity in a leaf litter decomposition experiment including monocultures, 2-, and 4-species mixtures in the subtropical climate zone of southeastern China. Soil microbial community composition was assessed by lipid analysis, and microbial functions were measured using extracellular enzyme activity and gross rates of nitrogen mineralization. We observed a positive relationship between litter species diversity and abundances of mycorrhizal fungi and actinomycetes. Alternatively, enzyme activities involved in carbon and phosphorus acquisition, and enzyme indices of relative carbon limitation, were higher only in the 4-species mixtures. This suggests that the minimum basal substrate level for enzyme production was reached, or that limitation was higher, at the highest diversity level only. Responses to litter diversity also changed over time, where phosphatase responses to litter diversity were strongest early in decomposition and the indices of carbon limitation relative to other nutrients showed stronger responses later in decomposition. Enzyme activities were related to lipid biomarker data and the mass of litter remaining at the third time point, but relationships between enzyme activity and the mass of litter remaining were not consistent across other time points. We conclude that litter species richness will likely only reduce microbial functions at key intervals of diversity loss while microbial growth is more sensitive to incremental diversity loss, with no clear relationships between them or to ecosystem functions. The observed litter diversity effects on soil microbial biomass and enzyme activity indicate interactions of aboveground and belowground communities, and together with environmental conditions they are important for maintaining ecosystem functions. © 2017, Springer International Publishing AG. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83269
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Soil Ecology, UFZ - Helmholtz Centre for Environmental Research, Theodor-Lieser-Strasse 4, Halle, Germany; Faculty of Biology, Geobotany, University of Freiburg, Schaenzlestr. 1, Freiburg, Germany; Spezielle Botanik und Funktionelle Biodiversität, University of Leipzig, Johannisallee 21-23, Leipzig, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, Germany; Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, Halle, Germany; Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, Zurich, Switzerland; Department of Soil, Water, and Climate, University of Minnesota, Twin Cities, 439 Borlaug Hall, 1991 Upper Buford Circle, St. Paul, MN, United States
Recommended Citation:
Pei Z.,Leppert K.N.,Eichenberg D.,et al. Leaf litter diversity alters microbial activity, microbial abundances, and nutrient cycling in a subtropical forest ecosystem[J]. Biogeochemistry,2017-01-01,134(2018-01-02)