Spatio-temporal variation for vegetative NPP in the lower-middle reaches of the Yangtze River based on MODIS data

WANG Lin; JING Yuanshu; ZHANG Yue

doi:10.11833/j.issn.2095-0756.2015.06.002

Volume 32 Issue 6

Nov. 2015

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WANG Lin, JING Yuanshu, ZHANG Yue. Spatio-temporal variation for vegetative NPP in the lower-middle reaches of the Yangtze River based on MODIS data[J]. Journal of Zhejiang A&F University, 2015, 32(6): 829-836. doi: 10.11833/j.issn.2095-0756.2015.06.002

Citation:

WANG Lin, JING Yuanshu, ZHANG Yue. Spatio-temporal variation for vegetative NPP in the lower-middle reaches of the Yangtze River based on MODIS data[J]. Journal of Zhejiang A&F University, 2015, 32(6): 829-836. doi: 10.11833/j.issn.2095-0756.2015.06.002

Spatio-temporal variation for vegetative NPP in the lower-middle reaches of the Yangtze River based on MODIS data

doi: 10.11833/j.issn.2095-0756.2015.06.002

1.
Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China;
2.
School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China

Funds:

国家自然科学基金资助项目（2012g121）;江苏省滩涂生物资源与环境保护重点建设实验室开放基金资助项目（JLCBE11003）

Received Date: 2015-01-17
Rev Recd Date: 2015-03-31
Publish Date: 2015-12-20

Abstract

Vegetative net primary productivity （NPP） is an important indicator of terrain ecosystem quality. In order to improve the comprehension on vegetation response to human activity and global changes, spatio-temporal characteristics of NPP in the lower-middle reaches of the Yangtze River from Moderate Resolution Imaging Spectroradiometer （MODIS） data were analyzed by GIS technology. Then influential factors affecting these characteristics were explored in the lower-middle reaches of the Yangtze River from 2001-2010. The linear regression coefficients among different annual NPP maps were used to assess the changing trend of NPP and a correlation analysis was also used for the analysis. Results showed that the annual NPP varied from 420 to 670 gm－2a－1, with an average of 562 gm－2a－1. With respect to inter-annual variation, NPP decreased in most regions, but only 7% regions reached the significance level （P＜0.05）. In regards to spatial distribution, NPP in the southern parts of the region seemed to be higher than in the northern parts, and NPP in coastal regions was higher than inland areas. The correlation analysis revealed that vegetative NPP was significantly sensitive to climate changes （P＜0.05） with annual NPP positively correlated to temperature （r = 0.49） and sunshine duration （r = 0.19） but negatively correlated to precipitation （r = －0.22）. In addition, land cover type transformations also played an important role with vegetative NPP variation. This paper proved that the concentrated human activities and cliamte changes severely affected the natural ecosystems, and might give a deep impression on carbon cycles. ［Ch, 4 fig. 1 tab. 26 ref.］
- ecology,
- net primary productivity,
- MODIS,
- spatio-temporal characteristics,
- climate factors,
- land cover types

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Spatio-temporal variation for vegetative NPP in the lower-middle reaches of the Yangtze River based on MODIS data

1. Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, Jiangsu, China;

2. School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China

Funds:

国家自然科学基金资助项目（2012g121）;江苏省滩涂生物资源与环境保护重点建设实验室开放基金资助项目（JLCBE11003）

Received Date: 2015-01-17

Rev Recd Date: 2015-03-31

Publish Date: 2015-12-20

Key words:

Abstract: Vegetative net primary productivity （NPP） is an important indicator of terrain ecosystem quality. In order to improve the comprehension on vegetation response to human activity and global changes, spatio-temporal characteristics of NPP in the lower-middle reaches of the Yangtze River from Moderate Resolution Imaging Spectroradiometer （MODIS） data were analyzed by GIS technology. Then influential factors affecting these characteristics were explored in the lower-middle reaches of the Yangtze River from 2001-2010. The linear regression coefficients among different annual NPP maps were used to assess the changing trend of NPP and a correlation analysis was also used for the analysis. Results showed that the annual NPP varied from 420 to 670 gm－2a－1, with an average of 562 gm－2a－1. With respect to inter-annual variation, NPP decreased in most regions, but only 7% regions reached the significance level （P＜0.05）. In regards to spatial distribution, NPP in the southern parts of the region seemed to be higher than in the northern parts, and NPP in coastal regions was higher than inland areas. The correlation analysis revealed that vegetative NPP was significantly sensitive to climate changes （P＜0.05） with annual NPP positively correlated to temperature （r = 0.49） and sunshine duration （r = 0.19） but negatively correlated to precipitation （r = －0.22）. In addition, land cover type transformations also played an important role with vegetative NPP variation. This paper proved that the concentrated human activities and cliamte changes severely affected the natural ecosystems, and might give a deep impression on carbon cycles. ［Ch, 4 fig. 1 tab. 26 ref.］

Spatio-temporal variation for vegetative NPP in the lower-middle reaches of the Yangtze River based on MODIS data

doi: 10.11833/j.issn.2095-0756.2015.06.002

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Related

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