Brazil Nut

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The oily seed of Bertholletia excelsa, the cream nut, which contains 100 µg selenium
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Ortiz, has observed a single-aged line of old Brazil nut trees marking a former forest trail in Madre de Dios.
Moreover, harvested areas appear to have a greater abundance of Brazil nut trees than areas where harvesting has historically been more limited.
While Brazil nut concessionaires like Zegarra face mounting land-tenure insecurity, Indigenous groups (called "Native Communities" in Peru) are winning rights to ancestral forests that contain Brazil nut trees as part of a wave of Indigenous land tiding and tenure devolution taking hold in many countries in the Americas, including Honduras, Nicaragua, Ecuador, and Brazil.
The Brazil nut tree may not be able to save tropical forests on its own, but it has been and will certainly continue to be essential in protecting the forests of the Amazon.
The Brazil nut trees in southeastern Peru not only preserve large tracts of the tropical Amazon but also support intricately interrelated biological and economic systems
The researchers also surveyed the Brazil nut trees for size, a standard way of estimating tree ages.