气候变化领域集成服务门户(CCPortal): Are the combined effects of warming and drought on foliar C:N:P:K stoichiometry in a subtropical forest greater than their individual effects?

CCPortal

DOI	10.1016/j.foreco.2019.06.021
	Are the combined effects of warming and drought on foliar C:N:P:K stoichiometry in a subtropical forest greater than their individual effects?
	Zhang Q.; Zhou J.; Li X.; Yang Z.; Zheng Y.; Wang J.; Lin W.; Xie J.; Chen Y.; Yang Y.
发表日期	2019
ISSN	0378-1127
起始页码	256
结束页码	266
卷号	448
英文摘要	Carbon (C), nitrogen (N), phosphorus (P), and, more recently, potassium (K) have been examined in ecological stoichiometry because they are the most abundant elements in organic matter. An increasing number of studies are investigating the potential responses of plants to future global climate change scenarios, and although warming and drought may greatly influence ecosystem function and services, their combined effects on C:N:P:K stoichiometry remain unknown. In the present study, we assessed the stoichiometry of a major subtropical tree species Cunninghamia lanceolata (Lamb.) Hook, in southern China in terms of its responses to warming and drought stresses. To measure C, N, P, and K concentrations, C:N:P:K stoichiometric ratios, and stable isotope abundance, we sampled C. lanceolata needles from seedlings subject to four treatments: control (CT), warming (W, with 5 °C increase in temperature), drought (D, with 50% decrease in precipitation), and the abovementioned warming and drought conditions combined (WD). The warming and drought conditions applied simulated the climate changes predicted for the next decades in southern China. We found that variations in foliar C:N:P:K stoichiometric ratios were driven by changes in nutrient concentration, season, and treatment. Unexpectedly, differences in foliar intrinsic water use efficiency across sampling seasons were not significant. The WD conditions increased foliar N concentration (57%) and the δ15N value (111%) across the different seasons, and significant interactive effects between warming and drought on foliar N concentration and δ15N were clearly demonstrated. The N cycle is likely to accelerate in subtropical forests, with more of the “heavier” N being mobilized for plant use, and thus the combination of warming plus drought may alleviate plant N restrictions in the future. Thus, foliar δ15N might be used as an indicator of the changes in N cycling in C. lanceolata forests. © 2019 Elsevier B.V.
英文关键词	Combined effect; Drought; Stable isotope; Stoichiometry; Warming
语种	英语
scopus关键词	Drought; Ecology; Forestry; Isotopes; Stoichiometry; Tropics; Combined effect; Cunninghamia lanceolata; Ecological stoichiometry; Global climate changes; Intrinsic water-use efficiencies; Nutrient concentrations; Stable isotopes; Warming; Climate change; climate change; concentration (composition); drought; ecosystem function; global climate; global warming; organic matter; precipitation (climatology); stable isotope; stoichiometry; subtropical region; tree; water use efficiency; Drought; Ecology; Forestry; Isotopes; Stoichiometry; Tropics; China; Cunninghamia lanceolata
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155880
作者单位	State Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, Fujian Normal University, Fuzhou, 350007, China; School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China; Institute of Geography, Fujian Normal University, Fuzhou, 350007, China
推荐引用方式 GB/T 7714	Zhang Q.,Zhou J.,Li X.,et al. Are the combined effects of warming and drought on foliar C:N:P:K stoichiometry in a subtropical forest greater than their individual effects?[J],2019,448.
APA	Zhang Q..,Zhou J..,Li X..,Yang Z..,Zheng Y..,...&Yang Y..(2019).Are the combined effects of warming and drought on foliar C:N:P:K stoichiometry in a subtropical forest greater than their individual effects?.Forest Ecology and Management,448.
MLA	Zhang Q.,et al."Are the combined effects of warming and drought on foliar C:N:P:K stoichiometry in a subtropical forest greater than their individual effects?".Forest Ecology and Management 448(2019).