City Know-hows

Urban biodiversity helps with mental well-being, but we need to take more notice of it

Sample view of the high biodiversity virtual park used in the study.

Mental well-being increased for the participants who saw lots of plants and animals (biodiversity) in our virtual park. However, 60% of our participants overestimated the biodiversity shown.

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Target audience

Landscape architects, Landscape managers, Urban planners

The problem

As urbanisation continues globally, the interest in urban green space as a provider/supporter of mental well-being is still growing. The question has largely moved on from “Will a walk in the park help with mental well-being?” to “Will a walk in any park do?” Previous research suggested that urban green spaces with rich fauna and flora (i.e. rich biodiversity) improved mental well-being. However, the experimental evidence remains limited.

What we did and why

To test the hypothesis that more biodiverse green spaces will elicit greater well-being we asked over 1700 participants from Europe and China to explore a virtual park. All participants reported their mood before and after exploring a park with either lower or higher biodiversity. All participants also rated their perception of biodiversity (i.e. how many kinds of plants and animals they guessed to be present)

Our study’s contribution

Both parks with low and high biodiversity improved the mood in both European and Chinese participants, especially in stressed individuals. Participants who thought the park had a lot of species (high perceived biodiversity) reported greater mood improvements compared to the others. However, these perceptions generally overestimated the actual biodiversity. This suggests that stress recovery can occur in parks, but greater well-being effects can be gained if park visitors perceive and notice more biodiversity.

Impacts for city policy and practice

This experiment shows that managing green spaces to increase biodiversity can be done without compromising the well-being provided. More biodiverse parks are more resilient against climate change and provide more ecosystem services. Designers of green spaces could aim to increase the perceived biodiversity, which has the potential to improve the well-being provided. The role of managers in sustaining and enhancing park landscapes for biodiversity must not be underestimated, given the potential benefits for long-term well-being.

Further information

Full research article:

[OPEN ACCESS] ‘The Elephant in the Room’ – does actual or perceived biodiversity elicit restorative responses in a virtual park? by Simone Farris, Liwen Zhang, Nicola Dempsey, Kirsten McEwan, Helen Hoyle and Ross Cameron.

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