What is the critical limiting factor for plants below the photic zone is an aquatic ecosystem?
Answer Details
The photic zone is the upper layer of an aquatic ecosystem where sunlight can penetrate and support photosynthesis. Below the photic zone, light becomes increasingly scarce, making it the critical limiting factor for plant growth. Without adequate light, plants cannot photosynthesize and produce the energy they need to survive. Even if all other factors such as nutrients, water, and carbon dioxide are available in sufficient amounts, lack of light will prevent plants from growing and reproducing. Therefore, the correct answer is: the critical limiting factor for plants below the photic zone in an aquatic ecosystem is the intensity of light.