Trees for the future, with Dr Elisabeth Karlstad Larsen

In this episode, Kate Bradbury interviews Dr. Elizabeth Karlstad-Larsen, an Ecosystem Services Fellow at the RHS, who specializes in the ecosystem services provided by garden trees. They begin by discussing the initiative 'Trees for Future,' which aims to identify tree species that can thrive in a rapidly changing climate while supporting biodiversity and maintaining tree cover in the UK. Dr. Karlstad-Larsen explains the expected climate shifts, like increased temperature and altered rainfall patterns, and their implications for tree survival and urban ecosystem services.

The conversation dives deep into what ecosystem services trees provide, including flood mitigation, pollution capture, and habitat support for wildlife. Trees also contribute to cooling urban heat, which is especially crucial in cities that suffer from the urban heat island effect. The duo stresses the importance of planting the right tree in a suitable location, highlighting risks in urban planning choices such as paving over gardens and the use of plastic grass.

Dr. Karlstad-Larsen explains how different tree species can adapt to varied conditions, advocating for a mix of both native and non-native species to ensure resilience against changing climates. They also touch upon the benefits of growing fruit trees in the context of food security and the emotional connections people hold with trees, emphasizing that one tree can significantly impact an individual's relationship with nature.

The episode culminates in insights about tree selection based on local climates, discussing various options like crab apples and hawthorns while cautioning against poorly suited choices. Ultimately, the conversation serves as a call to action for gardeners and urban planners alike to rethink their approach to greenery in urban environments.