When doing ecological research, why is controlling light intensity important?

Controlling light intensity is crucial in ecological research primarily because it influences the growth of photosynthetic organisms. Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy, using it to produce food and oxygen. The rate of photosynthesis is directly affected by the amount of light available; too little light can limit growth, while too much may cause stress or damage to these organisms.

By maintaining consistent light intensity in experiments, researchers can accurately assess how various factors affect photosynthesis and the health of aquatic ecosystems. This understanding is essential for evaluating ecological dynamics, as photosynthetic organisms form the foundation of the food web in marine environments.