Iriri River Iriri River The Iriri River () is a large tributary of the Xingu River in Brazil, in the state of Pará. It is long making it the 116th longest river in the world (with Krishna River, India) and the 15th longest in the Amazon basin. The headwaters are the traditional home of the Panará people. The river rises in the Nascentes da Serra do Cachimbo Biological Reserve, a strictly protected conservation unit established in 2005 in the Serra do Cachimbo. It is one of the headwaters of the Xingu River. It flows for before joining the Xingu, running through the
Xingu-Tocantins-Araguaia moist forests its valuable trees, and many native fauna and flora have become locally extinct. Large-scale mining near Marabá and elsewhere have directly affected the environment, and demand large quantities of wood to run the smelters. During the period from 2004 to 2011 the ecoregion experienced an annual rate of habitat loss of 0.94%. Global warming will force tropical species to migrate uphill to find areas with suitable temperature and rainfall. Low, flat, deforested ecoregions such as the Xingu-Tocantins-Araguaia moist forests are extremely vulnerable. Conservation units include the Tapirapé Biological Reserve and Tapirapé-Aquiri National Forest. Xingu-Tocantins-Araguaia moist forests The Xingu-Tocantins-Araguaia moist forests