Editing Net primary productivity (NPP) (section)

== Geographic / System Context ==
Net primary productivity is a global-scale phenomenon occurring across diverse ecosystems including forests, grasslands, wetlands, agricultural lands, and aquatic systems. Its spatial distribution varies with climate, soil conditions, vegetation type, and land use. Tropical rainforests typically exhibit high NPP due to favorable temperature and moisture, while arid and polar regions show lower productivity. Variability in NPP also reflects seasonal and interannual climatic fluctuations, as well as anthropogenic influences such as land management and pollution.