Nemrut (volcano) of the earliest trade routes. Two eruptions of Nemrut were probably witnessed by people of Urartu, an ancient state located in the eastern Turkey. These eruptions occurred c. 787 BC (period of King Menua) and c. 657 BC (period of King Rusa II), and the latter eruption might cause the sudden disappearance of the city Uaiais located 30 km east of Süphan. In the 1980s, Japanese volcanologists studied the evolution of gases inside the caldera of Nemrut. They found that the ratio of helium isotopes He/He is 1.06, which indicates volcanic activity (most of the measured helium evolved from the
Lake Nemrut fescue ("Festuca ovina"), "Salvia", "Ranunculus", "Silene", rabbitfoot clover ("Trifolium arvense"), "Pimpinella", "Artemisia", squarrose ("Centaurea triumfettii"). Reedy areas are present In the northwestern part of Lake Nemrıt. The griffon vulture brood their eggs at the caldera, which earned its status of special protected area as habitat for breeding of velvet duck and golden eagle. The number of bird species decreased at Lake Nemrut, which is a stopover site for a lot of migrating birds, due to irregular and uncontrolled hunting. Currently observed animals in the region are the bird species partridge, duck, bee-eater, Armenian gull and mammals hare, fox, bear. The