Chin J Plan Ecolo ›› 2007, Vol. 31 ›› Issue (3): 413-424.doi: 10.17521/cjpe.2007.0050

• Research Articles • Previous Articles     Next Articles

ESTIMATION OF NET PRIMARY PRODUCTIVITY OF CHINESE TERRESTRIAL VEGETATION BASED ON REMOTE SENSING

ZHU Wen-Quan; PAN Yao-Zhong; ZHANG Jin-Shui*   

  1. Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education, College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China
  • Online:2007-05-30 Published:2007-05-30
  • Contact: ZHANG Jin-Shui

Abstract:

Aims Net primary productivity (NPP) is a key component of the terrestrial carbon cycle. Model simulation is commonly used to estimate regional and global NPP given difficulties to directly measureNPP at such spatial scales. A number of NPP models have been developed in recent years as research issues related to food security and biotic response to climatic warming have become more compelling. However, large uncertainties still exist because of the complexity of ecosystems and difficulties in determining some key model parameters.
Methods We developed an estimation model of NPP based on geographic information system (GIS) and remote sensing (RS) technology. The vegetation types and their classification accuracy are simultaneously introduced to the computation of some key vegetation parameters, such as the maximum value of normalized difference vegetation index (NDVI) for different vegetation types. This can remove some noise from the remote sensing data and the statistical errors of vegetation classification. It also provides a basis for the sensitivity analysis ofNPP on the classification accuracy. The maximum light use efficiency (LUE) for some typical vegetation types in China is simulated using a modified least squares function based on NOAA/AVHRR remote sensing data and field-observed NPP data. The simulated values of LUE are greater than the value used in the CASA model and less than the values simulated with the BIOME-BGC model. The computation of the water restriction factor is driven with ground meteorological data and remote sensing data, and complex soil parameters are avoided. Results are compared with other studies and models.
Important findings The simulated mean NPP in Chinese terrestrial vegetation from 1989-1993 is 3.12 Pg C (1 Pg=1015 g). The simulated NPP is close to the observedNPP, and the total mean relative error is 4.5%for 690 NPP observation stations distributed in the whole country. This illustrates the utility of the model for the estimation of terrestrial primary production over regional scales.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Xiling Dai;Jianguo Cao;Quanxi Wang* . Formation and Development of Sporoderm of Ceratopteris thalictroides (L.) Brongn. (Parkeriaceae)[J]. Chin Bull Bot, 2008, 25(01): 72 -79 .
[2] Liu De-li. Heat-Shock Proteins of Plants and their Functions[J]. Chin Bull Bot, 1996, 13(01): 14 -19 .
[3] Chengqiang Ding, Dan Ma, Shaohua Wang, Yanfeng Ding. Optimization Process and Method of 2-D Electrophoresis for Rice Proteomics[J]. Chin Bull Bot, 2011, 46(1): 67 -73 .
[4] Xing Xue-rong Lu Chun-sheng Guo Da-li. Effect of Oraganic Acid to Nitrate Reductase and Nitrite Reductase Activity in the Vegetables[J]. Chin Bull Bot, 1995, 12(专辑2): 156 -162 .
[5] SONG Ke-Min. Phosphorus Nutrition of Plants: Phosphate Transport Systems and their Regulation[J]. Chin Bull Bot, 1999, 16(03): 251 -256 .
[6] CHEN Fa-Ju;YANG Ying-Gen;ZHAO De-Xiu;GUI Yao-Lin and GUO Zhong-Chen. Advances in Studies of Species Habitats Distribution and Chemical Composition of Snow Lotuses(Saussurea) in China[J]. Chin Bull Bot, 1999, 16(05): 561 -566 .
[7] YANG Hong-QiangJIE Yu-lingLI Jun. The Stresses Messenger from Roots and Its Production and Transport in Plant[J]. Chin Bull Bot, 2002, 19(01): 56 -62 .
[8] Hui Li, Guangcan Zhang, Huicheng Xie, Jingwei Xu, Chuanrong Li, Juwen Sun. The Effect of Phenol Concentration on Photosynthetic Physiological Parameters of Salix babylonica[J]. Chin Bull Bot, 2016, 51(1): 31 -39 .
[9] . [J]. Chin Bull Bot, 1996, 13(专辑): 97 -98 .
[10] LIU Xiao-Mei, FANG Jian, ZHANG Jing, LIN Wu-Ying, FAN Ting-Lu, FENG Hu-Yuan. EFFECTS OF LONG-TERM FERTILIZATION ON VERTICAL DISTRIBUTION OF MICROORGANISMS IN WHEAT FIELD SOIL[J]. Chin J Plan Ecolo, 2009, 33(2): 397 -404 .