Briefs · Frontier Science
When humans disappear, biodiversity takes a surprising turn
Nature does not always bounce back when people leave. Sometimes it needs them to stay.
In Japan’s satoyama landscapes, volunteers thin forests, plant rice and count fireflies — and a study of 464 species (Nature Sustainability 2025) found biodiversity declined both where people moved in and where they moved out. When irrigation stops, amphibians and insects cannot breed; when woods go untended, they close in. ‘Leaving it alone isn’t doing anyone any good,’ says Peter Matanle. Japan’s population shrank by four million between 2015 and 2025, and only 8.6% of it is now rural.
The same pattern shows across Europe: farmland birds fell 58% between 1980 and 2024, and Sweden has lost more than 90% of its semi-natural grasslands in some regions — habitat for a third of its threatened species.
Conclusion: conservation is not a hands-off hobby. It is gardening.
Read the original at Nature News
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