气候变化领域集成服务门户(CCPortal): Light asymmetry explains the effect of nutrient enrichment on grassland diversity

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DOI	10.1111/ele.12706
	Light asymmetry explains the effect of nutrient enrichment on grassland diversity
	DeMalach N.; Zaady E.; Kadmon R.
发表日期	2017
ISSN	1461-023X
EISSN	1461-0248
卷号	20 期号:1
英文摘要	One of the most ubiquitous patterns in plant ecology is species loss following nutrient enrichment. A common explanation for this universal pattern is an increase in the size asymmetry of light partitioning (the degree to which large plants receive more light per unit biomass than smaller plants), which accelerates the rates of competitive exclusions. This ‘light asymmetry hypothesis’ has been confirmed by mathematical models, but has never been tested in natural communities due to the lack of appropriate methodology for measuring the size asymmetry of light partitioning in natural communities. Here, we use a novel approach for quantifying the asymmetry of light competition which is based on measurements of the vertical distribution of light below the canopy. Using our approach, we demonstrate that an increase in light asymmetry is the main mechanism behind the negative effect of nutrient enrichment on species richness. Our results provide a possible explanation for one of the main sources of contemporary species loss in terrestrial plant communities. © 2016 John Wiley & Sons Ltd/CNRS
英文关键词	Annual plants; biomass; competition; fertilization; forbs; nitrogen; productivity; richness; size asymmetry; species loss
学科领域	biodiversity; biomass; grassland; light; plant physiology; radiation response; Biodiversity; Biomass; Grassland; Light; Plant Physiological Phenomena
语种	英语
scopus关键词	biodiversity; biomass; grassland; light; plant physiology; radiation response; Biodiversity; Biomass; Grassland; Light; Plant Physiological Phenomena
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118446
作者单位	Department of Ecology, Evolution and Behavior, The Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel; Department of Natural Resources, Institute of Plant Sciences, Agriculture Research Organization, Ministry of Agriculture, Gilat Research Center, Gilat, 85280, Israel
推荐引用方式 GB/T 7714	DeMalach N.,Zaady E.,Kadmon R.. Light asymmetry explains the effect of nutrient enrichment on grassland diversity[J],2017,20(1).
APA	DeMalach N.,Zaady E.,&Kadmon R..(2017).Light asymmetry explains the effect of nutrient enrichment on grassland diversity.Ecology Letters,20(1).
MLA	DeMalach N.,et al."Light asymmetry explains the effect of nutrient enrichment on grassland diversity".Ecology Letters 20.1(2017).