Why do wood destroying fungi attack wood?

Wood-destroying fungi primarily attack wood because they thrive in environments rich in moisture. Fungi are saprophytic organisms that require specific conditions to flourish, and moisture is a critical component of those conditions. While the presence of moisture alone isn't the only factor, it creates an ideal habitat that supports the growth and reproduction of these fungi.

Fungi do not require chlorophyll for photosynthesis as plants do; they obtain nutrients by decomposing organic matter, including wood. Thus, moisture availability is vital as it enables them to penetrate the wood's cellular structure and break it down for nutrients. This relationship highlights the importance of controlling moisture levels in areas where wooden structures exist, as high humidity or leaks can encourage fungal growth, leading to significant damage over time.

The idea that fungi are attracted to color does not provide a basis for their wood-decaying behavior, as their decomposition activity is primarily driven by nutrient availability and moisture rather than aesthetic or color preferences. Furthermore, while they may prefer dead wood as a nutrient source, they will also attack living trees, especially those weakened or damaged, making moisture the more pivotal factor.