Index reveals integrity issues for many of the world's forests

Index reveals integrity issues for many of the world's forests
Forest integrity data mapped via the Forest Landscape Integrity Index.

Only 40% of forests are considered to have high ecological integrity, according to a new global measure, the Forest Landscape Integrity Index.

The Index was created by 47 and conservation experts from across the world, including Professor James Watson of The University of Queensland and the Wildlife Conservation Society.

"This extremely fine-scale analysis of the ecological integrity of the world's forests has found that only 17.4 million square kilometers of Earth's remaining forests—or 40% of them—are considered to have high integrity," Professor Watson said.

"And just 27% of this area is found in nationally designated protected areas.

"High integrity forests are those which contain high levels of biodiversity, provide high quality ecosystem services and are more resilient to .

"Many of our remaining forests have been heavily impacted by a variety of human activities, including logging, fires, hunting, wildlife exploitation and edge effects.

"These actions damage forest integrity.

"By protecting and expanding forests with high integrity, we can help slow the impacts of climate change, preserve biodiversity, protect the rights of indigenous peoples and local communities and prevent future pandemics."

Professor Watson said the was a result of rapid advances in remote sensing, big data and cloud computing.

"The use of this index is critical in allowing us to locate Earth's remaining intact forests and ensure that they are better protected but also hold nations to account for how they treat their forests," he said.

"We show how critical some countries are, including Canada, Brazil, Democratic Republic of Congo, Papua New Guinea and Australia, in sustaining the world's last large intact forests.

"The fine-scale nature of the map will also allow land managers to plan activities more effectively and to monitor change over time."

Dr. Hedley Grantham, lead author of the study and WCS's Director of Conservation Planning, said the study's results were fundamental to talks at the Convention on Biological Diversity.

"The current draft of the post-2020 Global Biodiversity Framework wisely proposes targets relating to ecosystem integrity and there has been active discussion about how this can be quantified and monitored," Dr. Grantham said.

"Using this index, we can now set ambitious policy goals to improve the integrity of forests globally."

The study is published in Nature Communications and the index can be accessed at

More information: H. S. Grantham et al. Anthropogenic modification of forests means only 40% of remaining forests have high ecosystem integrity, Nature Communications (2020). DOI: 10.1038/s41467-020-19493-3

Journal information: Nature Communications

Citation: Index reveals integrity issues for many of the world's forests (2020, December 9) retrieved 3 October 2023 from
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