Ecoregions and Climate
The Peruvian Amazon is traditionally divided into two distinct ecoregions:
The lowland jungle (in Spanish Selva Baja) is also known as Omagua region, Walla, Anti, Amazonian rainforest or Amazon basin. This ecoregion is the largest of Peru, standing between 80 and 1,000 meters above sea level. It has very warm weather with an average temperature of 28°C, high relative humidity (over 75%) and yearly rainfall of approximately 260 cm (100 in). Its soils are very heterogeneous, but almost all have river origins, and because of high temperatures and high rainfall they are poor soils with few nutrients.
The jungle contains long and powerful rivers such as the Apurimac, Mantaro, Amazon, Urubamba, Ucayali, Huallaga, Marañón, Putumayo, Yavarí, Napo, Pastaza, Madre de Dios, Manu, Purus, and Tigre. The Apurimac River is the source of the Amazon River. The Pacaya Samiria Reserve and the Allpahuayo-Mishana National Reserve are within the forest.
The highland jungle (in Spanish Selva Alta) is also called Rupa-Rupa region, Andean jungle, ceja de selva. This ecoregion extends into the eastern foothills of the Andes, between 1,000 to 3,800 m above the sea level. The eastern slopes of the Andes are home to a great variety of fauna and flora because of the different altitudes and climates within the region. Temperatures are warm in the lowlands and cooler in higher altitudes. There are many endemic fauna because of the isolation caused by the rugged terrain of the area.
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