Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China

NWIPB OpenIR

	Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China
	Zhu, Xianjin ; Yu, Guirui ; Wang, Qiufeng ; Hu, Zhongmin ; Han, Shijie ; Yan, Junhua ; Wang, Yanfen ; Zhao, Liang
	2014-02-01
发表期刊	JOURNAL OF FOREST RESEARCH ; Zhu, XJ; Yu, GR; Wang, QF; Hu, ZM; Han, SJ; Yan, JH; Wang, YF; Zhao, L.Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China,JOURNAL OF FOREST RESEARCH,2014,19(1):70
摘要	We selected four sites of ChinaFLUX representing four major ecosystem types in China-Changbaishan temperate broad-leaved Korean pine mixed forest (CBS), Dinghushan subtropical evergreen broadleaved forest (DHS), Inner Mongolia temperate steppe (NM), and Haibei alpine shrub-meadow (HBGC)-to study the seasonal dynamics of ecosystem water use efficiency (WUE = GPP/ET, where GPP is gross primary productivity and ET is evapotranspiration) and factors affecting it. Our seasonal dynamics results indicated single-peak variation of WUE in CBS, NM, and HBGC, which were affected by air temperature (Ta) and leaf area index (LAI), through their effects on the partitioning of evapotranspiration (ET) into transpiration (T) (i.e., T/ET). In DHS, WUE was higher at the beginning and the end of the year, and minimum in summer. Ta and soil water content affected the seasonal dynamics of WUE through their effects on GPP/T. Our results indicate that seasonal dynamics of WUE were different because factors affecting the seasonal dynamics and their mechanism were different among the key ecosystems.; We selected four sites of ChinaFLUX representing four major ecosystem types in China-Changbaishan temperate broad-leaved Korean pine mixed forest (CBS), Dinghushan subtropical evergreen broadleaved forest (DHS), Inner Mongolia temperate steppe (NM), and Haibei alpine shrub-meadow (HBGC)-to study the seasonal dynamics of ecosystem water use efficiency (WUE = GPP/ET, where GPP is gross primary productivity and ET is evapotranspiration) and factors affecting it. Our seasonal dynamics results indicated single-peak variation of WUE in CBS, NM, and HBGC, which were affected by air temperature (Ta) and leaf area index (LAI), through their effects on the partitioning of evapotranspiration (ET) into transpiration (T) (i.e., T/ET). In DHS, WUE was higher at the beginning and the end of the year, and minimum in summer. Ta and soil water content affected the seasonal dynamics of WUE through their effects on GPP/T. Our results indicate that seasonal dynamics of WUE were different because factors affecting the seasonal dynamics and their mechanism were different among the key ecosystems.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/37412
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Zhu, Xianjin,Yu, Guirui,Wang, Qiufeng,et al. Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China[J]. JOURNAL OF FOREST RESEARCH, Zhu, XJ; Yu, GR; Wang, QF; Hu, ZM; Han, SJ; Yan, JH; Wang, YF; Zhao, L.Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China,JOURNAL OF FOREST RESEARCH,2014,19(1):70,2014.
APA	Zhu, Xianjin.,Yu, Guirui.,Wang, Qiufeng.,Hu, Zhongmin.,Han, Shijie.,...&Zhao, Liang.(2014).Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China.JOURNAL OF FOREST RESEARCH.
MLA	Zhu, Xianjin,et al."Seasonal dynamics of water use efficiency of typical forest and grassland ecosystems in China".JOURNAL OF FOREST RESEARCH (2014).