Water response of ecosystem respiration regulates future projection of net ecosystem productivity in a semiarid grassland

2018 ◽  
Vol 252 ◽  
pp. 175-191 ◽  
Author(s):  
Lingjie Lei ◽  
Jianyang Xia ◽  
Xiaona Li ◽  
Kun Huang ◽  
Ang Zhang ◽  
...  
Keyword(s):  
Ecosystem Respiration ◽  
Net Ecosystem Productivity ◽  
Ecosystem Productivity ◽  
Future Projection ◽  
Semiarid Grassland ◽  
Water Response

scholarly journals Non-linear responses of net ecosystem productivity to gradient warming in a paddy field in Northeast China

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9327
Author(s):  
Yulu Sun ◽  
Fuyao Qu ◽  
Xianjin Zhu ◽  
Bei Sun ◽  
Guojiao Wang ◽  
...  
Keyword(s):  
Global Warming ◽  
Paddy Field ◽  
Linear Response ◽  
Northeast China ◽  
Ecosystem Respiration ◽  
Far Infrared ◽  
Net Ecosystem Productivity ◽  
Ecosystem Productivity ◽  
Non Linear ◽  
The Impact

Global warming has a known impact on ecosystems but there is a lack of understanding about its impact on ecosystem processes. Net ecosystem productivity (NEP) and its components play a key part in the global carbon cycle. Analysing the impact of global warming on NEP will improve our understanding of how warming affects ecosystems. In our study, conducted in 2018, five warming treatments were manipulated (0 W, 500 W, 1000 W, 1500 W, and 3000 W) using three repetitions of far infrared open warming over a paddy field in Northeast China. NEP and its two related components, gross primary productivity (GPP) and ecosystem respiration (ER), were measured using the static chamber-infrared gas analyser method to explore the effects of different warming magnitudes on NEP. Results showed that measurement dates, warming treatments, and their interactions significantly affected NEP, ER, and GPP. Warming significantly increased NEP and its components but they showed a non-linear response to different warming magnitudes. The maximum increases in NEP and its components occurred at 1500 W warming. NEP is closely related to its components and the non-linear response of NEP may have primarily resulted from that of GPP. Gradient warming non-linearly increased GPP in the paddy field studied in Northeast China, resulting in the non-linear response of NEP. This study provides a basis for predicting the responses of carbon cycles in future climate events.

scholarly journals Interannual variability of terrestrial net ecosystem productivity over China: regional contributions and climate attribution

2019 ◽  
Vol 14 (1) ◽  
pp. 014003 ◽  
Author(s):  
Li Zhang ◽  
Xiaoli Ren ◽  
Junbang Wang ◽  
Honglin He ◽  
Shaoqiang Wang ◽  
...  
Keyword(s):  
Interannual Variability ◽  
Net Ecosystem Productivity ◽  
Ecosystem Productivity
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