Using the TwinsUK panel, an international team of researchers led by the National University of Singapore examined the extent to which genetic versus environmental influences explain individual variation in nature orientation, the level of urbanization of home location, and four dimensions of nature experience: frequency and duration of public nature space visits and frequency and duration of domestic garden visits.
A person’s appreciation of nature and their tendency to visit natural spaces are heritable characteristics. Image credit: Adam Derewecki.
“Nature experiences have been linked to mental and physical health,” said study first author Dr. Chia-chen Chang from the National University of Singapore and colleagues.
“Despite the importance of understanding what determines individual variation in nature experience, the role of genes has been overlooked.”
In their study, the authors surveyed 1,153 pairs of twins on the TwinsUK registry about how they experience nature, asking them to rate their familiarity with and desire to be in nature, and how frequently they visit natural spaces such as public parks and private gardens.
They found that identical (monozygotic) twins, who share almost 100% of their genes, were more similar to each other in their orientation towards nature and how frequently they visited nature compared to fraternal (dizygotic) twins, who share around 50% of their genetic material.
Heritability ranged from 46% for nature orientation to 34% for frequency of garden visits, suggesting a moderate influence of genetics over how people experience nature.
However, environmental factors explained more than half of the differences between individuals.
People living in urban environments tended to have less nature experiences, due to for example limited access to gardens, highlighting the importance of availability in shaping nature-seeking behaviors.
Heritability also declined with age, suggesting that genetics may become less influential as people age and experience a unique set of environmental conditions.
Spending time in natural spaces improved mental well-being, but different people experienced and benefited from nature differently.
“The study provides the first evidence for a genetic component to both our predispositions towards nature and our tendency to visit natural spaces,” the researchers said.
“Nature-oriented people may actively seek out nature even if it means traveling from their home, but diverse urban planning is needed to provide access to natural spaces — and the benefits they offer — for all.”
“Spending time in nature links to better health and wellbeing. A twin study shows that a person’s desire to be in nature and how often they experience it are influenced by both genes and personal experiences,” Dr. Chang said.
The study was published in the journal PLoS Biology.
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C-c Chang et al. 2022. People’s desire to be in nature and how they experience it are partially heritable. PLoS Biol 20 (2): e3001500; doi: 10.1371/journal.pbio.3001500
