Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O-3 concentration in urban area

doi:10.7717/peerj.4453

CORC > 金属研究所 > 中国科学院金属研究所

	Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O-3 concentration in urban area
	Fu, Wei 1,2; He, Xingyuan 1; Xu, Sheng 1; Chen, Wei 1; Li, Yan 1; Li, Bo 1; Su, Lili 1; Ping, Qin 1
刊名	PEERJ
	2018-03-05
卷号	6 页码:17
关键词	Ginkgo biloba Litter decomposition Elevated O-3 concentration Litter quality
ISSN号	2167-8359
DOI	10.7717/peerj.4453
通讯作者	Xu, Sheng(xusheng@iae.ac.cn)
英文摘要	Ground-level ozone (O-3) pollution has been widely concerned in the world, particularly in the cities of Asia, including China. Elevated O-3 concentrations have potentially influenced growth and nutrient cycling of trees in urban forest. The decomposition characteristics of urban tree litters under O-3 exposure are still poorly known. Ginkgo biloba is commonly planted in the cities of northern China and is one of the main tree species in the urban forest of Shenyang, where concentrations of ground-level O-3 are very high in summer. Here, we hypothesized that O-3 exposure at high concentrations would alter the decomposition rate of urban tree litter. In open-top chambers (OTCs), 5-year-old G. biloba saplings were planted to investigate the impact of elevated O-3 concentration (120 ppb) on changes in nutrient contents and decomposition rate of leaf litters. The results showed that elevated O-3 concentration significantly increased K content (6.31 +/- 0.29 vs 17.93 +/- 0.40, P < 0.01) in leaves of G. biloba, significantly decreased the contents of total phenols (2.82 +/- 0.93 vs 1.60 +/- 0.44, P < 0.05) and soluble sugars (86.51 +/- 19.57 vs 53.76 +/- 2.40, P < 0.05), but did not significantly alter the contents of C, N, P, lignin and condensed tannins, compared with that in ambient air. Furthermore, percent mass remaining in litterbags after 150 days under ambient air and elevated 03 concentration was 56.0% and 52.8%, respectively. No significant difference between treatments was observed in mass remaining at any sampling date during decomposition. The losses of the nutrients in leaf litters of G. biloba showed significant seasonal differences regardless of O-3 treatment. However, we found that elevated O-3 concentration slowed down the leaf litter decomposition only at the early decomposition stage, but slightly accelerated the litter decomposition at the late stage (after 120 days). This study provides our understanding of the ecological processes regulating biogeochemical cycles from deciduous tree species in high-O-3 urban area.
资助项目	National Natural Science Foundation of China (NSFC)[41675153] ; National Natural Science Foundation of China (NSFC)[31270518] ; National Natural Science Foundation of China (NSFC)[31170573] ; Key development program the Chinese Academy Science[KFZD-SW-302-01] ; Key Project of NSFC[90411019]
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	PEERJ INC
WOS记录号	WOS:000427201300003
资助机构	National Natural Science Foundation of China (NSFC) ; Key development program the Chinese Academy Science ; Key Project of NSFC
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/127538]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xu, Sheng
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Shenyang, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Fu, Wei,He, Xingyuan,Xu, Sheng,et al. Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O-3 concentration in urban area[J]. PEERJ,2018,6:17.
APA	Fu, Wei.,He, Xingyuan.,Xu, Sheng.,Chen, Wei.,Li, Yan.,...&Ping, Qin.(2018).Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O-3 concentration in urban area.PEERJ,6,17.
MLA	Fu, Wei,et al."Changes in nutrients and decay rate of Ginkgo biloba leaf litter exposed to elevated O-3 concentration in urban area".PEERJ 6(2018):17.