Describe the ecosystem near the long river in the desert?

The nameNamibis ofNamaorigin and means "vast place".

According to the broadest definition, the Namib stretches for more than 2, 000 kilometres (1, 200mi) along the Atlantic coasts ofAngola, Namibia, andSouth Africa, extending southward from theCarunjamba Riverin Angola, through Namibia and to theOlifants Riverin Western Cape, South Africa.

[1][2]The Namib's northernmost portion, which extends 450 kilometres (280mi) from the Angola - Namibia border, is known asMoçâmedes Desert, while its southern portion approaches the neighboringKalahari Desert.

From the Atlantic coast eastward, the Namib gradually ascends in elevation, reaching up to 200 kilometres (120mi) inland to the foot of theGreat Escarpment.

[1]Annual precipitation ranges from 2 millimetres (0.

079in) in the most arid regions to 200 millimetres (7.

9in) at the escarpment, making the Namib the only true desert in southern Africa.

[1][2][3]Having enduredaridorsemi - aridconditions for roughly 55–80 million years, the Namib may be the oldest desert in the world[1][3]and contains some of the world's driest regions.