By Daisy Dunne
Forests containing several tree species could store twice as much carbon as the average monoculture plantation, research finds.
A study looking at the carbon storage of forests in southern China finds that each additional tree species introduced to a plantation could add 6% to its total carbon stocks.
The findings suggest that afforestation programmes – which aim to plant trees to “suck” CO2 out of the atmosphere – should switch from using just one plant species to a more diverse mix, a study author tells Carbon Brief.
Planting a diverse range of trees could also bring many co-benefits, the author adds, including providing habitats for a larger range of animals.
However, the relatively small scale of the experiment may have led researchers to overestimate the relationship between tree species diversity and carbon storage, other scientists tell Carbon Brief.