DOI: 10.1111/ele.12377
Scopus记录号: 2-s2.0-84916897745
论文题名: Ectomycorrhizal impacts on plant nitrogen nutrition: Emerging isotopic patterns, latitudinal variation and hidden mechanisms
作者: Mayor J. ; Bahram M. ; Henkel T. ; Buegger F. ; Pritsch K. ; Tedersoo L.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2015
卷: 18, 期: 1 起始页码: 96
结束页码: 107
语种: 英语
英文关键词: 15N
; Above- and below-ground interactions
; Nutrient cycling
; Nutrient limitation
; Plant-soil interactions
; Structural equation modelling
; Tropical ecology
Scopus关键词: nitrogen
; soil
; chemistry
; climate
; ecosystem
; metabolism
; microbiology
; mycorrhiza
; nitrogen cycle
; physiology
; plant
; soil
; statistical model
; Climate
; Ecosystem
; Models, Statistical
; Mycorrhizae
; Nitrogen
; Nitrogen Cycle
; Nitrogen Isotopes
; Plants
; Soil
; Soil Microbiology
英文摘要: Ectomycorrhizal (EcM)-mediated nitrogen (N) acquisition is one main strategy used by terrestrial plants to facilitate growth. Measurements of natural abundance nitrogen isotope ratios (denoted as δ15N relative to a standard) increasingly serve as integrative proxies for mycorrhiza-mediated N acquisition due to biological fractionation processes that alter 15N:14N ratios. Current understanding of these processes is based on studies from high-latitude ecosystems where plant productivity is largely limited by N availability. Much less is known about the cause and utility of ecosystem δ15N patterns in the tropics. Using structural equation models, model selection and isotope mass balance we assessed relationships among co-occurring soil, mycorrhizal plants and fungal N pools measured from 40 high- and 9 low-latitude ecosystems. At low latitudes 15N-enrichment caused ecosystem components to significantly deviate from those in higher latitudes. Collectively, δ15N patterns suggested reduced N-dependency and unique sources of EcM 15N-enrichment under conditions of high N availability typical of the tropics. Understanding the role of mycorrhizae in global N cycles will require reevaluation of high-latitude perspectives on fractionation sources that structure ecosystem δ15N patterns, as well as better integration of EcM function with biogeochemical theories pertaining to climate-nutrient cycling relationships. © 2014 John Wiley & Sons Ltd/CNRS. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107964
Appears in Collections: 气候减缓与适应
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作者单位: Smithsonian Tropical Research Institute, P.O. Box 0843-03092, Balboa, Ancon, Panama; Institute of Ecology and Earth Sciences, University of Tartu, 14a Ravila, Tartu, Estonia; Department of Biological Sciences, Humboldt State University, 1 Harpst St., Arcata, CA, United States; Institute of Soil Ecology, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstaedter Landstrasße 1, Neuherberg, Germany; Natural History Museum of Tartu University, 46 Vanemuise, Tartu, Estonia
Recommended Citation:
Mayor J.,Bahram M.,Henkel T.,et al. Ectomycorrhizal impacts on plant nitrogen nutrition: Emerging isotopic patterns, latitudinal variation and hidden mechanisms[J]. Ecology Letters,2015-01-01,18(1)