Abstract
An improved Carnegie Ames Stanford Approach model (CASA model) was used to estimate the net primary productivity (NPP) of the Northeast China Transect (NECT) every month from 1982 to 2000. The spatial-temporal distribution of NPP along NECT and its response to climatic change were also analyzed. Results showed that the change tendency of NPP spatial distribution in NECT is quite similar to that of precipitation and their spatial correlation coefficient is up to 0.84 (P < 0.01). The inter-annual variation of NPP in NECT is mainly affected by the change of the aestival NPP every year, which accounts for 67.6% of the inter-annual increase in NPP and their spatial correlation coefficient is 0.95 (P < 0.01). The NPP in NECT is mainly cumulated between May and September, which accounts for 89.8% of the annual NPP. The NPP in summer (June to August) accounts for 65.9% of the annual NPP and is the lowest in winter. Recent climate changes have enhanced plant growth in NECT. The mean NPP increased 14.3% from 1980s to 1990s. The inter-annual linear trend of NPP is 4.6 gC·m−2·a−1, and the relative trend is 1.17%, which owns mainly to the increasing temperature.
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Foundation item: This paper was supported by the National Natural Science Foundation of China (Grant No. 40371001) and the Youth Foundation of Beijing Normal University.
Biography: ZHU Wen-Quan (1975–), male, Ph.D. in College of Resources Science and Technology, Beijing Normal University, Beijing 100875, P. R. China.
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Zhu, Wq., Pan, Yz., Liu, X. et al. Spatio-temporal distribution of net primary productivity along the Northeast China Transect and its response to climatic change. J. of For. Res. 17, 93–98 (2006). https://doi.org/10.1007/s11676-006-0022-4
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DOI: https://doi.org/10.1007/s11676-006-0022-4
Keywords
- China Transect
- Remote sensing
- Net primary productivity (NPP)
- Climatic change
- Spatio-temporal distribution