Where Would NPP Be Lowest

Question

Where would NPP be lowest?
A) A freshwater lake
B) An estuary
C) A subtropical ocean gyre
D) A stream

Accepted Answer

NPP (Net Primary Productivity) is the amount of organic matter that is generated by photosynthesis in an ecosystem. It depends on various factors, such as the availability of nutrients, light, and CO2. Among the given options, subtropical ocean gyre would have the lowest NPP because these regions have low nutrient levels due to the slow mixing of surface and deep waters. In contrast, freshwater lakes, estuaries, and streams have higher nutrient levels, which would result in higher NPP.