What makes forest protection work?

What makes forest protection work? Swati Mestri Scientific Editor Andrew Zinin Chief Editor A new study from the Institute for Food and Resource Economics at the University of Bonn shows that the success of nature conservation measures depends partly on the credible enforcement of environmental laws. The study, "Enforcement drives conservation policy impacts at the Brazilian agricultural frontier," has been published in the journal Global Environmental Change and was led by Dr. Javier Miranda of the University of Bonn, in collaboration with Dr. David Wuepper and Dr. Jan Börner, both of the University of Bonn. What is it about? In October 2026, Brazil reported that annual deforestation in the Amazon rainforest and Cerrado savanna had fallen to its lowest recorded levels. This positive development raises an important question: What makes forest protection measures effective, and what is needed to sustain progress? A new study by researchers from the University of Bonn offers insights into this question by examining conservation policies at the agricultural frontier between Brazil's Amazon rainforest and Cerrado savanna, where agricultural expansion continues to put pressure on natural ecosystems. Brazil has long had laws regulating how much forest landowners must preserve. Over the past two decades, the country has also introduced additional measures to curb deforestation. These include restrictions on access to agricultural credit and markets for commodities such as soy when producers fail to comply with environmental regulations. But how effective are these measures, and why might their impact differ from one place to another? The study's findings offer insights into the conditions that help conservation policies succeed. How did the researchers proceed? The researchers examined changes in forest loss and agricultural land use along the boundary between the Amazon and Cerrado biomes in Brazil from 2000 to 2022. This boundary provides a unique opportunity to study conservation policies. While both sides are subject to Brazil's national forest legislation, additional conservation measures were introduced specifically for the Amazon. By comparing neighboring areas on either side of the boundary before and after these measures were introduced, the researchers could assess their effects while accounting for preexisting regional differences and broader changes affecting both regions. The team combined satellite-based land-use information with data on environmental fines to examine whether the additional measures had different effects in municipalities where existing environmental laws were enforced more or less strongly. What is the most important finding? Extra conservation measures reduced forest loss mainly where environmental laws were strongly enforced. The study found that the additional measures introduced in the Brazilian Amazon were associated with reductions in forest loss, particularly in municipalities with stronger enforcement. In areas where enforcement was weaker, the researchers found no clear evidence of similar reductions. This suggests that the success of new conservation policies depends partly on how effectively existing regulations are implemented. The researchers also examined whether these policies encouraged farmers to make more intensive use of already cleared land, for example, by converting pasture into cropland. These effects were weaker and less consistent, indicating that successful forest protection does not automatically translate into more intensive agricultural land use. The findings have implications beyond Brazil. They suggest that the same conservation policies can have very different effects depending on how strongly the underlying laws are enforced. This is particularly relevant as Brazil seeks to sustain its recent progress against deforestation. The country's experience shows that conservation gains are not necessarily permanent, with forest loss rising again after earlier reductions. The study highlights that sustaining these gains requires not only good policies but also consistent enforcement of existing environmental laws. More information Javier Miranda et al., Enforcement drives conservation policy impacts at the Brazilian agricultural frontier, Global Environmental Change (2026). DOI: 10.1016/j.gloenvcha.2026.103239 Provided by University of Bonn