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Simulation of the Grazing Effects on Grassland Aboveground Net Primary Production Using DNDC Model Combined with Time-Series Remote Sensing Data-A Case Study in Zoige Plateau, China
Wang, Jiyan1,2; Li, Ainong1; Bian, Jinhu1,2
Corresponding AuthorAinong Li
2016
Source PublicationREMOTE SENSING
EISSN2072-4292
Volume8Issue:3Pages:168
SubtypeArticle
AbstractMeasuring the impact of livestock grazing on grassland above-ground net primary production (ANPP) is essential for grass yield estimation and pasture management. However, since there is a lack of accurate and repeatable techniques to obtain the details of grazing locations and stocking rates at the regional scale, it is an extremely challenging task to study the influence of regional grazing on the grassland ANPP. Taking Zoige County as a case, this paper proposes an approach to quantify the spatial and temporal variation of grazing intensity and grazing period through time-series remote sensing data, simulated grassland ANPP through the denitrification and decomposition (DNDC) model, and then explores the impact of grazing on grassland ANPP. The result showed that the model-estimated ANPP while considering grazing had a significant relationship with the field-observed ANPP, with the coefficient of determination (R-2) of 0.75, root mean square error (RMSE) of 122.86 kgC/ha, and average relative error (RE) of 8.77%. On the contrary, if grazing activity was not considered in simulation, a large uncertainty was found when the model-estimated ANPP was compared with the field observation, showing R-2 of 0.4, RMSE of 211.51 kgC/ha, and average RE of 32.5%. For the whole area of Zoige County in 2012, the statistics of the estimation showed that the total regional ANPP was up to 3.815 x 10(5) tC, while the total regional ANPP, without considering grazing, would be overestimated by 44.4%, up to 5.51 x 10(5) tC. This indicates that the grazing parameters derived in this study could effectively improve the accuracy of ANPP simulation results. Therefore, it is feasible to combine time-series remote sensing data with the process model to simulate the grazing effects on grassland ANPP. However, some issues, such as selecting proper remote sensing data, improving the quality of model input parameters, collecting more field data, and exploring the data assimilation approaches, still should be considered in the future work.
KeywordZoige Plateau Dndc Model Npp Ndvi Grazing
WOS HeadingsScience & Technology ; Technology
DOI10.3390/rs8030168
WOS Subject ExtendedRemote Sensing
Indexed BySCI
WOS KeywordINNER-MONGOLIA ; SENSITIVITY-ANALYSIS ; ALPINE GRASSLANDS ; ECOSYSTEM MODEL ; NORTHERN CHINA ; TYPICAL STEPPE ; SATELLITE DATA ; CLIMATE-CHANGE ; STOCKING RATE ; CARBON STOCK
Language英语
Quartile2区
TOP
WOS SubjectRemote Sensing
WOS IDWOS:000373627400023
Funding OrganizationNational Natural Science Foundation of China(41271433 ; STS-Network Plan, CAS(KFJ-EW-STS-020-02) ; Strategic Leader Science and Technology project(XDA05050105) ; "Hundred Talents" Project of Chinese Academy of Sciences ; 41571373)
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17237
Collection数字山地与遥感应用中心
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wang, Jiyan,Li, Ainong,Bian, Jinhu. Simulation of the Grazing Effects on Grassland Aboveground Net Primary Production Using DNDC Model Combined with Time-Series Remote Sensing Data-A Case Study in Zoige Plateau, China[J]. REMOTE SENSING,2016,8(3):168.
APA Wang, Jiyan,Li, Ainong,&Bian, Jinhu.(2016).Simulation of the Grazing Effects on Grassland Aboveground Net Primary Production Using DNDC Model Combined with Time-Series Remote Sensing Data-A Case Study in Zoige Plateau, China.REMOTE SENSING,8(3),168.
MLA Wang, Jiyan,et al."Simulation of the Grazing Effects on Grassland Aboveground Net Primary Production Using DNDC Model Combined with Time-Series Remote Sensing Data-A Case Study in Zoige Plateau, China".REMOTE SENSING 8.3(2016):168.
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