Temperature and substrate availability regulate soil respiration in the   tropical mountain rainforests, Hainan Island, China

doi:10.1093/jpe/rtt034

CORC > 北京大学 > 城市与环境学院

	Temperature and substrate availability regulate soil respiration in the tropical mountain rainforests, Hainan Island, China
	Zhou, Zhang ; Jiang, Lai ; Du, Enzai ; Hu, Huifeng ; Li, Yide ; Chen, Dexiang ; Fang, Jingyun
刊名	journal of plant ecology
	2013
关键词	soil respiration soil temperature litter tropical mountain rainforest CO2 EFFLUX MICROBIAL BIOMASS NITROGEN ADDITION SUBTROPICAL CHINA CARBON ALLOCATION PINE PLANTATION ORGANIC-MATTER BOREAL FOREST LITTERFALL SENSITIVITY
DOI	10.1093/jpe/rtt034
英文摘要	Tropical forest plays a key role in global C cycle; however, there are few studies on the C budget in the tropical rainforests in Asia. This study aims to (i) reveal the seasonal patterns of total soil respiration (R-T), litter respiration (R-L) and soil respiration without surface organic litter (R-NL) in the primary and secondary Asian tropical mountain rainforests and (ii) quantify the effects of soil temperature, soil moisture and substrate availability on soil respiration. The seasonal dynamics of soil CO2 efflux was measured by an automatic chamber system (Li-8100), within the primary and secondary tropical mountain rainforests located at the Jianfengling National Reserve in Hainan Island, China. The litter removal treatment was used to assess the contribution of litter to belowground CO2 production. The annual R-T was higher in the primary forest (16.730.87 Mg C ha(1)) than in the secondary forest (15.100.26 Mg C ha(1)). The rates of R-T, R-NL and R-L were all significantly higher in the hot and wet season (MayOctober) than those in the cool and dry season (NovemberApril). Soil temperature at 5cm depth could explain 5561% of the seasonal variation in R-T, and the temperature sensitivity index (Q(10)) ranked by R-L (Q(10) 3.39) > R-T (2.17) > R-NL (1.76) in the primary forest and by R-L (4.31) > R-T (1.86) > R-NL (1.58) in the secondary forest. The contribution of R-L to R-T was 2223%, while litter input and R-T had 1 month time lag. In addition, the seasonal variation of R-T was mainly determined by soil temperature and substrate availability. Our findings suggested that global warming and increased substrate availability are likely to cause considerable losses of soil C in the tropical forests.; Plant Sciences; Ecology; SCI(E); 3; ARTICLE; 5; 325-334; 6
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/322239]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zhou, Zhang,Jiang, Lai,Du, Enzai,et al. Temperature and substrate availability regulate soil respiration in the tropical mountain rainforests, Hainan Island, China[J]. journal of plant ecology,2013.
APA	Zhou, Zhang.,Jiang, Lai.,Du, Enzai.,Hu, Huifeng.,Li, Yide.,...&Fang, Jingyun.(2013).Temperature and substrate availability regulate soil respiration in the tropical mountain rainforests, Hainan Island, China.journal of plant ecology.
MLA	Zhou, Zhang,et al."Temperature and substrate availability regulate soil respiration in the tropical mountain rainforests, Hainan Island, China".journal of plant ecology (2013).