 In this part of the Piedras River watershed, there are also several large private conservation-oriented concessions, including the Las Piedras Amazon Center (LPAC) (11,021 acres - 4,460 ha), run by the Peruvian nonprofit ARCAmazon, the Arbio concession, run by Arbio Peru  the Jungle Keepers concession (2,180 acres - 882 ha), which is a Peru-based non-profit, and land protected by Hoja Nueva, which is a US-based nonprofit.The original indigenous name of the Piedras River is “Tacuatimanu”.Indigenous communities in the region include the Masco-Piro, Amahuaca and the Yine.