OBJECTIVE FORESTRY

Detailed explanation-1: -In aquatic ecosystems, the limiting factor for productivity is light as plants and algae cannot grow in the absence of light.

Detailed explanation-2: -In aquatic ecosystems, sunlight is the most important factor that affects their productivity. This is because plants and algae will not be able to thrive in the absence of sunlight and photosynthesis.

Detailed explanation-3: -In aquatic ecosystems, light and nutrients limit primary production. Light is a key variable controlling primary production in oceans, since solar radiation can only penetrate to a certain depth known as the photic zone. ° The first meter of water absorbs more than half of the solar radiation.

Detailed explanation-4: -Nutrient availability is often the fact that limits net primary productivity in an aquatic ecosystem.