Response of net primary productivity (NPP) of Sichuan vegetations to global climate changes

Abstract

Abstract: According to the trend of global climate changes and in combination with the elevation factor,the authors simulated the changes of spatial distribution pattern for net primary productivity (NPP) of Sichuan vegetations under 5 combinations of thermal and hydrological conditions using Ecologicol Information System ( EIS ) and the vegetations net primary productivity model.The result indicated that the net primary productivity (NPP)-values of natural vegetation in Sichuan decreases gradually from southeast to northwest.The NPP-values was positively related to precipitation,while negatively related to the PER-values.The relationship between the NPP-values and the elevation is very complicated.The NPP-values were mainly decided by precipitation in the basin,but by the potential evaporating rate (PER) in the transitional region and the plateau.With changes of the global climate,the values and distribution area of NPPwill move from southeast to northwest of Sichuan Province.When the temperature and the precipitation increase by 2.5℃ and 10%,respectively,the NPP-values will increase by 13.76%.When the precipitation increases to 20%,the NPP-values will increase continually to 10.922 TDM·hm^-2·yr^-1.When the temperature increases by 4℃ and precipitation increases by 10%,the NPP-values will increase by 18.29%.With the decrease of precipitation to P-10%,NPPwill decrease gradually to 9.530 TDM·hm^-2·yr^-1.

Key words: Chilling, Low light, PI, SOD, POD, MDA

CLC Number:

Q948

XU Xiao. Response of net primary productivity (NPP) of Sichuan vegetations to global climate changes[J]. cje, 2004, (6): 19-24.

References

[1]王亲明,梁银丽.2002.植被净第一性生产力模型研究进展[J].干旱地区农业研究,20(2):104～107.
[2]刘文杰.2000.西双版纳近40年气候变化对自然植被净第一性生产力的影响山[J].山地学报,18(4):296 300.
[3]孙睿,朱启疆.1999.陆地植被净第一性生产力的研究[J].应用生态学报,10(6):757～760.
[4]孙睿,朱启疆.2000.中国陆地植被净第一性生产力及季节变化研究[J].地理学报,55(1):36～45.
[5]孙睿,朱启疆.2001.气候变化对中国陆地植被净第一性生产力影响的初步研究[J].遥感学报,5(1):58～62.
[6]朴世龙,方精云,郭庆华.2001.1982～1999年我国植被净第一性生产力及其时空变化[J].北京大学学报(自然科学版),37(4):563～569.
[7]朴世龙,方精云,郭庆华.2001.利用CASA模型估算我国植被净第一性生产力[J].植物生态学报,25(5):603～608.
[8]朴世龙,方精云.2002.1982～1999年青藏高原植被净第一性生产力及其时空变化[J].自然资源学报,17(3):373～380.
[9]闫淑君,洪伟,吴承祯,等.2001.自然植被净第一性生产力模型的改进[1].江西农业大学学报,23(2):248～252.
[10]张宏,樊自立.2000.塔里木盆地北部盐化草甸植被净第一性生产力模型研究[J].植物生态学报,24(1):13～17.
[11]陈波.2001.陆地植被净第一性生产力对全球气候变化响应研究的进展[J].浙江林学院学报,18(4):445～449.
[12]周广胜,郑元润,陈四清,等.1998.自然植被净第一性生产力模型及其应用[J].林业科学,34(5):2～11.
[13]郑元润,周广胜.2000.基于NDVI的中国天然森林植被净第一性生产力模型[J].植物生态学报,24(1):9～12.
[14]崔伟宏.1995.空间数据结构研究[M].北京:中国科学技术出版社.78～108.
[15]舒俭民,高吉喜,张林波,等.2001.全球环境问题[M].云南:贵州科技出版社.1～28.
[16]Zhang X, Yang D, Zhou G, et al .1996. Responses of the Qinghai Xizang (Tibetan) Plateau to Global Change [ A]. In: Ye Duzheng, eds., China Contribution to Global Change Studies [C]. Beijing: Science Press. 202 ～ 207.
[17]Zhou G, Wang Y. 2000. Global Change and Climate-Vegetation Classification[ J ]. Chin. Sci. Bull., 45 (7): 577 ～ 584.
[18]Zhou G, Wang Yuhui, Zhang Xinshi. 1999. Advance in the responses of vegetation/ecosystems in China to global change[J].B. C. Academy. S., 13(3): 158～ 165.