Indigenous territories protect human health, study finds

Indigenous territories are widely recognized as vital for conserving the environment and biodiversity, but far less is known about their role in protecting human health. Only recently have researchers begun to fill in this knowledge gap and investigate how the protection of these areas can provide health benefits as well as ecosystem services. Now, a new paper analyzing the relationship between Indigenous territories and the occurrence of 21 diseases in the Amazon biome over 20 years, published in Nature Portfolio's Communications Earth & Environment, suggests that healthy forests on protected Indigenous territories can help reduce disease incidence and risks to human health. Study lead author Júlia Rodrigues Barreto, a postdoctoral researcher at USP - Universidade de São Paulo in Brazil, and her colleagues looked at how Indigenous territories, depending on their legal status and landscape characteristics, could influence the incidence of fire-related illnesses, as well as vector-borne and zoonotic diseases — those transmitted by insect bites or passed on from animals. While the findings are complex, they show that municipalities that host legally protected Indigenous lands could have a lower risk of illness. The extent of forest cover plays a key part in this. Researchers found that to effectively reduce the risk of vector-borne or zoonotic diseases, Indigenous territories need to be located in a municipality with at least 40% forest cover. For fire-related diseases, Indigenous territories can help mitigate the impacts of fine particulate matter in municipalities where the forest cover is higher, more than 45%. The study’s data set doesn’t allow for comprehensive analysis of the overall evolution of zoonotic and vector-borne diseases, said study co-author Paula Prist, senior program coordinator for forests and grasslands at the IUCN, the global nature conservation authority. But broadly, these illnesses have increased since monitoring began, and deforestation has played a big role in their rise. Clearing trees alters local biodiversity to the benefit of stronger species that can transmit pathogens that are harmful to humans. Deforested areas are also more likely to have a greater human presence, leading to a higher outbreak risk. https://lnkd.in/e7yfx8Cv

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