Linking belowground and aboveground phenology in two boreal forests in   Northeast China

doi:10.1007/s00442-014-3055-y

CORC > 北京大学 > 城市与环境学院

	Linking belowground and aboveground phenology in two boreal forests in Northeast China
	Du, Enzai ; Fang, Jingyun
刊名	oecologia
	2014
关键词	Belowground-aboveground linkages Leaf phenology Root respiration Root phenology Plant phenology down-regulation ASPEN POPULUS-TREMULOIDES FINE-ROOT GROWTH SOIL RESPIRATION HARDWOOD FOREST CLIMATE-CHANGE VASCULAR DIFFERENTIATION PLANT PHENOLOGY WOODY-PLANTS SHOOT ECOSYSTEM
DOI	10.1007/s00442-014-3055-y
英文摘要	The functional equilibrium between roots and shoots suggests an intrinsic linkage between belowground and aboveground phenology. However, much less understanding of belowground phenology hinders integrating belowground and aboveground phenology. We measured root respiration (R (a)) as a surrogate for root phenology and integrated it with observed leaf phenology and radial growth in a birch (Betula platyphylla)-aspen (Populus davidiana) forest and an adjacent larch (Larix gmelinii) forest in Northeast China. A log-normal model successfully described the seasonal variations of R (a) and indicated the initiation, termination and peak date of root phenology. Both root phenology and leaf phenology were highly specific, with a later onset, earlier termination, and shorter period of growing season for the pioneer tree species (birch and aspen) than the dominant tree species (larch). Root phenology showed later initiation, later peak and later termination dates than leaf phenology. An asynchronous correlation of R (a) and radial growth was identified with a time lag of approximately 1 month, indicating aprioritization of shoot growth. Furthermore, we found that R (a) was strongly correlated with soil temperature and air temperature, while radial growth was only significantly correlated with air temperature, implying a down-regulating effect of temperature. Our results indicate different phenologies between pioneer and dominant species and support a down-regulation hypothesis of plant phenology which can be helpful in understanding forest dynamics in the context of climate change.; Ecology; SCI(E); PubMed; 0; ARTICLE; duez@pku.edu.cn; jyfang@urban.pku.edu.cn; 3; 883-892; 176
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/160540]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Du, Enzai,Fang, Jingyun. Linking belowground and aboveground phenology in two boreal forests in Northeast China[J]. oecologia,2014.
APA	Du, Enzai,&Fang, Jingyun.(2014).Linking belowground and aboveground phenology in two boreal forests in Northeast China.oecologia.
MLA	Du, Enzai,et al."Linking belowground and aboveground phenology in two boreal forests in Northeast China".oecologia (2014).