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
Source PublicationECOLOGY AND EVOLUTION
Volume9Issue:15
AbstractNet 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.
Keywordaboveground net primary productivity alpine Kobresia meadow belowground net primary productivity growing season air temperature growing season precipitation
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/59742
Collection中国科学院西北高原生物研究所
Recommended Citation
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).
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