DOI: 10.1111/ele.12665
Scopus记录号: 2-s2.0-84991270338
论文题名: Teasing apart plant community responses to N enrichment: the roles of resource limitation, competition and soil microbes
作者: Farrer E.C. ; Suding K.N.
刊名: Ecology letters
ISSN: 14610248
EISSN: 1461-0248
出版年: 2016
卷: 19, 期: 10 起始页码: 1287
结束页码: 1296
语种: 英语
英文关键词: Alpine tundra
; asymmetric competition
; desert grassland
; diversity
; fertilisation
; global change
; greenhouse experiment
; inoculum
; nitrogen
; tallgrass prairie
Scopus关键词: carbon
; fertilizer
; nitrogen
; bacterium
; biodiversity
; classification
; grassland
; metabolism
; microbiology
; plant
; plant physiology
; population density
; tundra
; Bacteria
; Biodiversity
; Carbon
; Fertilizers
; Grassland
; Nitrogen
; Plant Physiological Phenomena
; Plants
; Population Density
; Soil Microbiology
; Tundra
英文摘要: Although ecologists have documented the effects of nitrogen enrichment on productivity, diversity and species composition, we know little about the relative importance of the mechanisms driving these effects. We propose that distinct aspects of environmental change associated with N enrichment (resource limitation, asymmetric competition, and interactions with soil microbes) drive different aspects of plant response. We test this in greenhouse mesocosms, experimentally manipulating each factor across three ecosystems: tallgrass prairie, alpine tundra and desert grassland. We found that resource limitation controlled productivity responses to N enrichment in all systems. Asymmetric competition was responsible for diversity declines in two systems. Plant community composition was impacted by both asymmetric competition and altered soil microbes, with some contributions from resource limitation. Results suggest there may be generality in the mechanisms of plant community change with N enrichment. Understanding these links can help us better predict N response across a wide range of ecosystems. © 2016 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/107718
Appears in Collections: 气候减缓与适应
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作者单位: Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA, 70118, USA; Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, 80303, USA
Recommended Citation:
Farrer E.C.,Suding K.N.. Teasing apart plant community responses to N enrichment: the roles of resource limitation, competition and soil microbes[J]. Ecology letters,2016-01-01,19(10)