Change and vulnerability of Net Primary Production (NPP) in Iranian forest, rangeland and desert ecosystems impacted by climate change

Iran faced with climate and environmental changes in past years and it is projected that some climatic changes will occur in the future. Net Primary Production (NPP) is an important index to evaluate production in natural ecosystems including forest، rangeland and desert. Climate change impact will cause changes in biomass production in natural ecosystems. In this research، the vulnerability of NPP in Iranian forest، rangeland and desert ecosystem has been considered. Results of this consideration presented here in six selected climatic zones in Gilan، Mazandaran، East Azerbyjan، Kermanshah، Khorasan and Systan and Baluchestan provinces. According to the result outcomes، total NPP of forest، rangeland and desert ecosystem in Gilan، East Azerbyjan، and Khorasan provinces، under temperature and precipitation changes، has been increased in the year ended 2039. While، the amount of NPP in Mazandaran، Kermanshah، and Systan and Baluchestan provinces would have been decreased. These changes in Khorasan provinces (including North، South and Razavi) will show highest increase، indicating suitable increase of precipitation and temperature in the region. Quantitative changes in NPP depend on total biomass and changes of precipitation and temperature. As an example، these changes in forest ecosystems of Gilan، and Khorasan provinces، will increase and in Mazandaran، and Kermanshah provinces، will decrease. Also، these changes in range ecosystems of East Azerbyjan، and Khorasan provinces، will increase and in Kermanshah، and Systan and Baluchestan provinces، will decrease. While، changes in desert ecosystems of Khorasan provinces mainly will increase and in Systan and Baluchestan provinces، will decrease.