How do forests act as carbon sinks?

Prepare for the NRCan Foundations Exam with study materials crafted for success. Utilize flashcards and multiple choice questions, enhanced with hints and detailed explanations. Ace your exam confidently!

Forests act as carbon sinks by removing CO2 from the atmosphere through photosynthesis and storing that carbon in living biomass and in soils. As trees and other vegetation grow, they lock carbon into wood, leaves, and roots, increasing the carbon pool in the forest. At the same time, soil organic matter formed from leaf litter, fallen branches, and root turnover adds to the soil carbon reservoir, which can persist for decades to centuries. The net effect is a reduction in atmospheric CO2, especially in well-managed or undisturbed forests. Disturbances like fire or harvesting can release some of that stored carbon back into the air, but intact forests typically continue to absorb more carbon than they release over time. Other statements miss the point that forests do store carbon and have a meaningful impact on the carbon cycle, even though wetlands also store carbon.