Nitrogen controls the net primary production of an alpine Kobresia meadow in the northern Qinghai-Tibet Plateau

NWIPB OpenIR

	Nitrogen controls the net primary production of an alpine Kobresia meadow in the northern Qinghai-Tibet Plateau
	Dai, Licong; Ke, Xun; Du, Yangong; Zhang, Fawei; Li, Yikang; Li, Qian; Lin, Li; Peng, Cuoji; Shu, Kai; Cao, Guangmin; Guo, Xiaowei
	2019
发表期刊	ECOLOGY AND EVOLUTION
卷号	9 期号:15
摘要	Net primary production (NPP) is a fundamental property of natural ecosystems. Understanding the temporal variations of NPP could provide new insights into the responses of communities to environmental factors. However, few studies based on long-term field biomass measurements have directly addressed this subject in the unique environment of the Qinghai-Tibet plateau (QTP). We examined the interannual variations of NPP during 2008-2015 by monitoring both aboveground net primary productivity (ANPP) and belowground net primary productivity (BNPP), and identified their relationships with environmental factors with the general linear model (GLM) and structural equation model (SEM). In addition, the interannual variation of root turnover and its controls were also investigated. The results show that the ANPP and BNPP increased by rates of 15.01 and 143.09 g/m(2) per year during 2008-2015, respectively. BNPP was mainly affected by growing season air temperature (GST) and growing season precipitation (GSP) rather than mean annual air temperature (MAT) or mean annual precipitation (MAP), while ANPP was only controlled by GST. In addition, available nitrogen (AN) was significantly positively associated with BNPP and ANPP. Root turnover rate averaged 30%/year, increased with soil depth, and was largely controlled by GST. Our results suggest that alpine Kobresia meadow was an N-limited ecosystem, and the NPP on the QTP might increase further in the future in the context of global warming and nitrogen deposition.
关键词	aboveground net primary productivity alpine Kobresia meadow belowground net primary productivity growing season air temperature growing season precipitation
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/59742
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	Dai, Licong,Ke, Xun,Du, Yangong,et al. Nitrogen controls the net primary production of an alpine Kobresia meadow in the northern Qinghai-Tibet Plateau[J]. ECOLOGY AND EVOLUTION,2019,9(15).
APA	Dai, Licong.,Ke, Xun.,Du, Yangong.,Zhang, Fawei.,Li, Yikang.,...&Guo, Xiaowei.(2019).Nitrogen controls the net primary production of an alpine Kobresia meadow in the northern Qinghai-Tibet Plateau.ECOLOGY AND EVOLUTION,9(15).
MLA	Dai, Licong,et al."Nitrogen controls the net primary production of an alpine Kobresia meadow in the northern Qinghai-Tibet Plateau".ECOLOGY AND EVOLUTION 9.15(2019).