Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China

NWIPB OpenIR

	Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China
	Guo Ran ; Xiao-ke, Wang ; Ouyang Zhi-yun ; Li Ying-nian
	2006
发表期刊	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA ; Guo Ran,Wang Xiaoke,Ouyang Zhiyun,Li Yingnian.Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China.Journal of Environmental Sciences,2006,18(5):1024-1030
摘要	Precipitation is considered to be the primary resource limiting terrestrial biological activity in water-limited regions. Its overriding effect on the production of grassland is complex. In this paper, field data of 48 sites (including temperate meadow steppe,temperate steppe, temperate desert steppe and alpine meadow) were gathered from 31 published papers and monographs to analyze the relationship between above-ground net primary productivity (ANPP) and precipitation by the method of regression analysis. The results indicated that there was a great difference between spatial pattern and temporal pattern by which precipitation influenced grassland ANPP. Mean annual precipitation (MAP) was the main factor determining spatial distribution of grassland ANPP (r~2 = 0.61,P ＜ 0.01); while temporally, no significant relationship was found between the variance of AN PP and inter-annual precipitation for the four types of grassland. However, after dividing annual precipitation into monthly value and taking time lag effect into account, the study found significant relationships between ANPP and precipitation. For the temperate meadow steppe, the key variable determining inter-annual change of ANPP was last August-May precipitation (r~2= 0.47, P = 0.01); for the temperate steppe, the key variable was July precipitation (r~2 = 0.36, P = 0.02); for the temperate desert steppe, the key variable was April-June precipitation (r~2 = 0.51, P ＜0.01); for the alpine meadow, the key variable was last September-May precipitation (r~2 = 0.29, P ＜ 0.05). In comparison with analogous research, the study demonstrated that the key factor determining inter-annual changes of grassland ANPP was the cumulative precipitation in certain periods of that year or the previous year.; Precipitation is considered to be the primary resource limiting terrestrial biological activity in water-limited regions. Its overriding effect on the production of grassland is complex. In this paper, field data of 48 sites (including temperate meadow steppe, temperate steppe, temperate desert steppe and alpine meadow) were gathered from 31 published papers and monographs to analyze the relationship between above-ground net primary productivity (ANPP) and precipitation by the method of regression analysis. The results indicated that there was a great difference between spatial pattern and temporal pattern by which precipitation influenced grassland ANPP. Mean annual precipitation (MAP) was the main factor determining spatial distribution of grassland ANPP (r(2) = 0.61, P < 0.01); while temporally, no significant relationship was found between the variance of ANPP and inter-annual precipitation for the four types of grassland. However, after dividing annual precipitation into monthly value and taking time lag effect into account, the study found significant relationships between ANPP and precipitation. For the temperate meadow steppe, the key variable determining inter-annual change of AN PP was last August-May precipitation (r(2) = 0.47, P = 0.01); for the temperate steppe, the key variable was July precipitation (r(2) = 0.36, P = 0.02); for the temperate desert steppe, the key variable was April-June precipitation (r(2) = 0.51,P < 0.01); for the alpine meadow, the key variable was last September-May precipitation (r(2) = 0.29, P < 0.05). In comparison with analogous research, the study demonstrated that the key factor determining inter-annual changes of grassland ANPP was the cumulative precipitation in certain periods of that year or the previous year.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/39684
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	Guo Ran,Xiao-ke, Wang,Ouyang Zhi-yun,et al. Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA, Guo Ran,Wang Xiaoke,Ouyang Zhiyun,Li Yingnian.Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China.Journal of Environmental Sciences,2006,18(5):1024-1030,2006.
APA	Guo Ran,Xiao-ke, Wang,Ouyang Zhi-yun,&Li Ying-nian.(2006).Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA.
MLA	Guo Ran,et al."Spatial and temporal relationships between precipitation and ANPP of four types of grasslands in northern China".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA (2006).