Plant nitrogen and phosphorus utilization under invasive pressure in a montane ecosystem of tropical China

	Plant nitrogen and phosphorus utilization under invasive pressure in a montane ecosystem of tropical China
	Chao‐Chen Hu; Yan‐Bao Lei; Yun‐Hong Tan; Xin‐Chao Sun; Hao Xu; Cong‐Qiang Liu; Xue‐Yan Liu
	2019
Source Publication	Journal of Ecology
Volume	107 Issue:1 Pages:372-386
Abstract	Exotic plant invasion has been changing the vegetation composition and function of terrestrial ecosystems. Nitrogen (N) and phosphorus (P) are often the limiting nutrients for terrestrial plants. However, under invasive pressure, in situ plant N and P usage mechanisms remain poorly understood but are pivotal for a better understanding of plant invasion and coexistence in invaded ecosystems. Nitrogen and P concentrations, natural ¹⁵N abundance (δ¹⁵N values) were investigated in leaves and soils under different invasive pressures (here expressed as the biomass percentages of invasive plants in each plot) for two invasive species (Chromolaena odorata and Ageratina adenophora) in Xishuangbanna in tropical China. Soil N and P concentrations revealed the relatively N‐rich but P‐poor status of our study site. Under invasion, soil inorganic N (dominated by ammonium) and available P did not increase significantly. The leaf N and P of invasive plants increased, while leaf N increased but P decreased for native species. Natural δ¹⁵N mass balance between leaves and soil inorganic N sources revealed that ammonium dominated N utilization in both natives and invaders. Invasive plants showed ammonium utilization with increasing leaf N levels, while native plants under no invasion showed nitrate utilization with increasing leaf N levels. Synthesis. Increased soil ammonium availability contributed to preferential ammonium utilization by invasive plants and elevated ammonium utilization in natives, but the P competition of natives decreased in invaded ecosystems. These novel insights into nutrient dynamics in invaded ecosystems enhance our understanding of plant invasion and coexistence mechanisms.
Keyword	Ammonium Preference biodiversity ecological Stoichiometry exotic Plant invasion phosphorus Plant Coexistence soil Nitrogen Availability stable Nitrogen Isotope
Indexed By	SCI
Language	英语
Document Type	期刊论文
Identifier	http://ir.gyig.ac.cn/handle/42920512-1/10933
Collection	环境地球化学国家重点实验室
Affiliation	1.Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China 2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China 3.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China 4.Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna 666303, China
Recommended Citation GB/T 7714	Chao‐Chen Hu；Yan‐Bao Lei；Yun‐Hong Tan；Xin‐Chao Sun；Hao Xu；Cong‐Qiang Liu；Xue‐Yan Liu. Plant nitrogen and phosphorus utilization under invasive pressure in a montane ecosystem of tropical China[J]. Journal of Ecology,2019,107(1):372-386.
APA	Chao‐Chen Hu；Yan‐Bao Lei；Yun‐Hong Tan；Xin‐Chao Sun；Hao Xu；Cong‐Qiang Liu；Xue‐Yan Liu.(2019).Plant nitrogen and phosphorus utilization under invasive pressure in a montane ecosystem of tropical China.Journal of Ecology,107(1),372-386.
MLA	Chao‐Chen Hu；Yan‐Bao Lei；Yun‐Hong Tan；Xin‐Chao Sun；Hao Xu；Cong‐Qiang Liu；Xue‐Yan Liu."Plant nitrogen and phosphorus utilization under invasive pressure in a montane ecosystem of tropical China".Journal of Ecology 107.1(2019):372-386.

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