In General,where Would Net Primary Productivity Be Regulated More by the Availability

Question

In general,where would net primary productivity be regulated more by the availability of nutrients?
A) In a savanna
B) In a lake
C) In a desert
D) On mountains

Accepted Answer

Net primary productivity in a lake would be regulated more by the availability of nutrients as lakes are often characterized by low nutrient levels, especially phosphorus and nitrogen, which are essential for photosynthesis and growth of primary producers. This may lead to a phenomenon known as nutrient limitation, where the growth of primary producers is limited by the availability of these nutrients. In contrast, savannas and forests often have abundant nutrients in the soil, while deserts and mountains typically have low productivity due to other limiting factors such as water availability or extreme temperatures.