In 2011, The Bonn Challenge was launched by the German government and the International Union for Conservation of Nature to restore 350 million hectares of degraded or deforested land around the world by 2030. As part of this effort, the African Forest Landscape Restoration Initiative (AFR100) was formed, with 34 countries across the continent pledging to reforest 133.6 million hectares of land.
But this has raised concerns about how other key ecosystems in Africa may be affected. To learn more, Kate Parr at the University of Liverpool in the UK and her colleagues compared the size of the areas committed for forest restoration in each AFR100 country to the areas that are naturally forest habitats.
For 18 of the countries, they found that the pledged area exceeds the actual forest area, so non-forest habitats must be included within the pledged regions.
Of the 133.6 million hectares committed for reforestation across Africa, 70.1 million hectares are made up of non-forest ecosystems, mainly grasslands and savannahs.
The team also found that 52 per cent of the projects that are already underway are taking place on either grasslands or savannahs. Of these, around half are agroforestry projects. These involve planting trees on farmland, which tends to be a non-forest area made up of non-native species with low overall species diversity.
In ecosystems that are open and grassy, trees typically grow in a sparse pattern. When mass planting clumps trees together, they can damage smaller plants by drastically reducing their access to sunlight. This has a knock-on effect on the animals, such as zebras, who feed on these plants.
Many of the involved countries receive funding to carry out reforestation projects, so there is a financial incentive to plant more trees, says Parr.
Parr hopes those in charge of reforestation initiatives will consider the wider impacts of where they plant trees, while working with local communities to ensure people’s livelihoods aren’t affected.
An AFR100 spokesperson says that the initiative has made it clear that grasslands should not be converted into forests. “AFR100 supports a range of approaches to restore health to Africa’s land, so that people and nature can thrive,” they say. “The authors of this article mistakenly equate restoration with reforestation and assume that AFR100 focuses solely on the latter, which is untrue. For example, agroforestry projects add trees to existing croplands to improve soil fertility, increase water retention and reduce topsoil erosion. Agroforestry practices do not convert farms to forests. These agroforestry projects make up the vast majority of restoration projects affiliated with AFR100 today and must be included in any fair assessment of AFR100.”
A Guest Editorial