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Assessing the spatiotemporal variation of NPP and its response to driving factors in Anhui province, China

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Abstract

Net primary productivity (NPP) of terrestrial ecosystems is an important metric of ecosystem functioning; however, the understanding of response mechanism of NPP to influencing factors and driving mechanisms are still limited. In this study, taking Anhui province as an example, spatio-temporal changes of NPP and its response to influencing factors were investigated for evaluating the effects of climate change and land use and land cover change (LUCC) on regional NPP. The Carnegie–Ames–Stanford Approach (CASA) model was employed for NPP simulation by using the MODIS normalized difference vegetation index (NDVI) data and meteorological data over 2001–2016. Combined domestic LUCC, the spatiotemporal distribution pattern and dynamic change characteristics of NPP under a long time series and its response to climate factors and human activities were analyzed in the Anhui province. The results indicated that from 2001 to 2016, total NPP had a fluctuated and decreased trend with the variation range between 30.52 and 38.07 TgC in Anhui province. The multi-year average of total NPP was about 34.62 TgC. The highest value was in 2008 and the lowest value was in 2011. Among them, amount of forestland NPP was the most. The spatial distribution of NPP shows that the high value area was mainly distributed in southern Anhui mountain areas and western Anhui Dabie mountain areas; the lower value was distributed in the middle in the study area. The area of which the NPP showed a slight decrease and essentially unchanged accounted for 59.35% and 31.82%, respectively. In general, the correlation between vegetation NPP and temperature was greater than that between precipitation. The vegetations NPP of eight land use types were all positively correlated with temperature. However, the other seven types of land use were negatively correlated with precipitation except cultivated land. In the past 16 years, the decrease of cultivated land areas and the increase of urban and construction land areas contributed a lot to the decrease of vegetation NPP in Anhui province. The NPP changes of different land use types were closely related to climatic factors, land cover area, and vegetation types.

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Acknowledgments

We are grateful to the chief editor and anonymous reviewers for illuminating comments.

Funding

This research was mainly supported by “Natural Science Foundation of Anhui Province” (grant no. 1908085MC60), Natural Science Research Key Project in College of Anhui Province (grant no. KJ2015A127), “Foundation of Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Anhui Province,” “Foundation of Provincial Key Laboratory of Conservation and Utilization for Important Biological Resource in Anhui,” and Foundation of Key Lab Biot Environm & Ecol Safety Anhui Prov.

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Authors and Affiliations

  1. College of Life Sciences, Anhui Normal University, 1 East Beijing Road, Wuhu, 241000, Anhui, People’s Republic of China

    Hongfei Yang, Dandan Hu, Hao Xu & Xuanning Zhong

  2. Collaborative Innovation Centre of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Wuhu, Anhui, China

    Hongfei Yang

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  1. Hongfei Yang
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  2. Dandan Hu
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  3. Hao Xu
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  4. Xuanning Zhong
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Contributions

HFY conceived and designed the experiments. HFY and DDH performed the experiments. HFY, DDH, XNZ, and HX analyzed the data. HFY and DDH wrote the paper.

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Correspondence to Hongfei Yang.

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Responsible editor: Philippe Garrigues

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Yang, H., Hu, D., Xu, H. et al. Assessing the spatiotemporal variation of NPP and its response to driving factors in Anhui province, China. Environ Sci Pollut Res 27, 14915–14932 (2020). https://doi.org/10.1007/s11356-020-08006-w

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  • DOI: https://doi.org/10.1007/s11356-020-08006-w

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