In this Monday episode of Talking Trees, we explore three essential water-related processes—transpiration, evaporation, and interception—that shape how trees interact with their environment and regulate the water cycle.

We discuss:

• Transpiration, the movement of water from roots through the plant and its release as vapor from leaf surfaces, driven by sunlight, humidity, and stomatal activity
• Evaporation, the transformation of water from liquid to vapor at exposed surfaces such as soil, bark, or leaf litter, contributing to cooling and moisture redistribution
• Interception, where rainwater is temporarily held by leaves, branches, and bark, delaying or reducing the amount reaching the ground and influencing infiltration and runoff
• How these processes vary with canopy structure, species, and climate, playing a key role in microclimate regulation and urban hydrology
• Their combined impact on tree health, drought resilience, and stormwater management

Understanding these dynamics helps arborists and planners appreciate how trees actively shape local environments and water systems.

Background information:

• Wikipedia

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