International Journal of Multidisciplinary Research and Development

International Journal of Multidisciplinary Research and Development


International Journal of Multidisciplinary Research and Development
International Journal of Multidisciplinary Research and Development
Vol. 3, Issue 9 (2016)

Temporal variations in net primary production (NPP) and gross primary production (GPP) of three coniferous forests


Mohamed AA Mohamed, Insaf S Babiker, Tetsuya Hiyama

North latitudes temperate and boreal forests play an important role in the global carbon cycle. However, their responses to climate variability are not fully understood. Meteorological data including incident photosynthetic active radiation (PAR), absorbed photosynthetic active radiation (APAR), air temperature, precipitation, and relative humidity were obtained for three coniferous forests from the Euroflux network with 1-4 years data collected between 1997 and 2000. Net primary production was modeled using APAR and biome-specific conversion efficiency in order to investigate the variations and magnitude of vegetation responses to environmental variables. Seasonal variations of NPP reflected the typical phenology of temperate forests with peak productivity in spring-summer due to limiting growing season and changes in incoming radiations. Monthly NPP was tightly correlated to temperature, relative humidity and PAR while no relation was found with total precipitation. Temperature controls the productivity of coniferous forests by directly enhancing their metabolic activity and indirectly accelerating decomposition of organic matter in soil.
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How to cite this article:
Mohamed AA Mohamed, Insaf S Babiker, Tetsuya Hiyama. Temporal variations in net primary production (NPP) and gross primary production (GPP) of three coniferous forests. International Journal of Multidisciplinary Research and Development, Volume 3, Issue 9, 2016, Pages 125-132
International Journal of Multidisciplinary Research and Development International Journal of Multidisciplinary Research and Development