# Influences of Extreme Weather Conditions on the Carbon Cycles of Bamboo and Tea Ecosystems
## 4 Conclusions  
In this study, we measured meteorological indexes, soil water content, and SR between 2016-2017 at a bamboo and green tea plot on a hillslope in the MLRYR, China. Then, we constructed mathematical models based on CLM4.5 to describe the water and C cycles for these two plots. The mean observed SR was 1.79-2.57 \(\upmu\)mol m\({}^{-2}\) s\({}^{-1}\) at four bamboo sites and 1.34-1.50 \(\upmu\)mol m\({}^{-2}\) s\({}^{-1}\) at four tea sites from April 2016 to October 2017. The observations illustrated the seasonal dynamics of SR, showing a peak in April-October at the two plots. The observed SR at the bamboo plot reflected both RR and HR, while the observed SR at the tea plot reflected mainly HR. Based on the good fit of the observed soil water contents at different depths at the two plots, the model effectively reproduced the seasonal dynamics of SR at the bamboo plot and HR at the tea plot. The \(R^{2}\) values between the observed and modeled SR were 0.43-0.87 and 0.58-0.71 for the bamboo and tea sites, respectively. The observed SR decreased by 23% and 55% due to an extreme drought in August 2016 at the bamboo and tea plots, respectively, and the model also reproduced this decrease. The modeling results indicated that tea acted as a greater C sink during spring and a greater C source during autumn and winter compared with bamboo. GPP, NPP, and NEE were affected much more by extremely dry weather than by extremely wet weather at both the bamboo and tea plots. The extremely dry period likely caused the change in both plots from a C sink to a C source and had greater influences on the tea plot.  
The following are available online at [[http://www.mdpi.com/1999-4907/9/10/629/s1](http://www.mdpi.com/1999-4907/9/10/629/s1)]([http://www.mdpi.com/1999-4907/9/10/629/s1](http://www.mdpi.com/1999-4907/9/10/629/s1)), Figure S1: Data availability for the modeling study. FSDS, incident solar radiation; FLDS, incident longwave radiation; Temp, surface air temperature, Figure S2: Accelerated decomposition spinup and final spinup results for bamboo and tea plots, Figure S3: Observed and modeled daily soil water content at different depths at bamboo and tea plots, Figure S4: Observed (dots) and modeled (lines) leaf area index for Moso bamboo, Figure S5: Modeled leaf area index and various carbon pools, Figure S6: Modeled weekly carbon fluxes at the two study plots. AR, autotrophic respiration; ER, ecosystem respiration; GPP, gross primary production; NEE, net ecosystem exchange; NPP, net primary production.  
Conceptualization, C.F. and Q.Z.; Methodology, C.F., Q.Z. and Z.W.; Validation, C.F. and Q.Z.; Data Curation, Q.X. and W.X.; Writing-Original Draft Preparation, C.F.; Writing-Review & Editing, Q.Z.; Supervision, G.Y.  
This study was funded by the National Natural Science Foundation of China, grant number (41622102), Pioneer Hundred Talent Program, Chinese Academy of Sciences, grant number (Y7 BR021001), NIGLAS startup project for introducing talents, grant number (Y7 SL041001), and Key Research Plans of Frontier Sciences, Chinese Academy of Sciences, grant number (QYZDB-SSW-DQC038).  
Data for driving and validating the model are hosted at [[https://drive.google.com/drive/folders/15](https://drive.google.com/drive/folders/15) plKoGZKdUQFYwBH8 AJ368 CXrVMNcex]([https://drive.google.com/drive/folders/15](https://drive.google.com/drive/folders/15) plKoGZKdUQFYwBH8 AJ368 CXrVMNcex).  
The authors declare no conflict of interest.