Which of these factors can increase tree failure risks?

The factor that increases tree failure risks is compromised or damaged roots. A tree’s root system is essential for its stability, nutrient uptake, and overall health. When roots are damaged, whether through physical injury, disease, or environmental stress, they can no longer adequately anchor the tree or support its physiological needs. This can lead to a higher likelihood of the tree failing, especially during adverse weather conditions like strong winds or heavy snowfall, which can exert additional forces on the tree.

Healthy root systems ensure that trees are well anchored and can absorb necessary resources, thus reducing failure risk. Insufficient lighting conditions can affect tree health but do not directly increase failure risks in the same manner as compromised roots. Likewise, species diversity in the surrounding area can actually benefit forest health and resilience, which might contribute to lowering the inherent risk of tree failure. Therefore, compromised roots are a critical risk factor that contributes directly to tree instability and potential failure.