气候变化领域集成服务门户(CCPortal): Taxonomic identity determines N2 fixation by canopy trees across lowland tropical forests

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DOI	10.1111/ele.12543
	Taxonomic identity determines N2 fixation by canopy trees across lowland tropical forests
	Wurzburger N.; Hedin L.O.
发表日期	2016
ISSN	1461-023X
EISSN	1461-0248
卷号	19 期号:1
英文摘要	Legumes capable of fixing atmospheric N2 are abundant and diverse in many tropical forests, but the factors determining ecological patterns in fixation are unresolved. A long-standing idea is that fixation depends on soil nutrients (N, P or Mo), but recent evidence shows that fixation may also differ among N2-fixing species. We sampled canopy-height trees across five species and one species group of N2-fixers along a landscape P gradient, and manipulated P and Mo to seedlings in a shadehouse. Our results identify taxonomy as the major determinant of fixation, with P (and possibly Mo) only influencing fixation following tree-fall disturbances. While 44% of trees did not fix N2, other trees fixed at high rates, with two species functioning as superfixers across the landscape. Our results raise the possibility that fixation is determined by biodiversity, evolutionary history and species-specific traits (tree growth rate, canopy stature and response to disturbance) in the tropical biome. Copyright © 2016 John Wiley & Sons Ltd/CNRS.
英文关键词	Arbuscular mycorrhizal fungi; Biodiversity; Disturbance; Molybdenum; Nitrogen; Nutrient limitation; Phosphorus; Tree-fall gaps
学科领域	Fungi; molybdenum; nitrogen; phosphorus; soil; chemistry; classification; Fabaceae; forest; metabolism; microbiology; mycorrhiza; nitrogen fixation; phylogeny; physiology; soil; tree; tropic climate; Fabaceae; Forests; Molybdenum; Mycorrhizae; Nitrogen; Nitrogen Fixation; Phosphorus; Phylogeny; Soil; Trees; Tropical Climate
语种	英语
scopus关键词	Fungi; molybdenum; nitrogen; phosphorus; soil; chemistry; classification; Fabaceae; forest; metabolism; microbiology; mycorrhiza; nitrogen fixation; phylogeny; physiology; soil; tree; tropic climate; Fabaceae; Forests; Molybdenum; Mycorrhizae; Nitrogen; Nitrogen Fixation; Phosphorus; Phylogeny; Soil; Trees; Tropical Climate
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/118602
作者单位	Odum School of Ecology, University of Georgia, Athens, GA, United States; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, United States
推荐引用方式 GB/T 7714	Wurzburger N.,Hedin L.O.. Taxonomic identity determines N2 fixation by canopy trees across lowland tropical forests[J],2016,19(1).
APA	Wurzburger N.,&Hedin L.O..(2016).Taxonomic identity determines N2 fixation by canopy trees across lowland tropical forests.Ecology Letters,19(1).
MLA	Wurzburger N.,et al."Taxonomic identity determines N2 fixation by canopy trees across lowland tropical forests".Ecology Letters 19.1(2016).