In this Monday episode of Talking Trees, we explore how urban trees respond to rising temperatures and what determines their heat resistance in the face of climate change and the urban heat island effect.

We discuss:

• The physiological and biochemical effects of heat on trees, including impacts on photosynthesis, respiration, and water regulation
• Methods to assess heat tolerance, from leaf-level tests to remote sensing technologies
• Why urban trees are particularly vulnerable due to limited rooting space, reflective surfaces, and compacted soils
• Strategies to enhance heat resilience: species selection based on provenance, breeding programs, and targeted fertilisation
• The critical gap in research focusing specifically on urban tree species, and the need to prioritise this area for sustainable city planning

Selecting and managing trees for heat resilience is key to maintaining urban canopy cover and the essential ecosystem services it provides.

Background information:

• Percival. 2023. Heat Tolerance of Urban Trees - A Review.pdf

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