Sierra Madre Occidental

Barranca del cobre 2

Cascada Basaseachi

Rio Santiago

Durango volcanic field

Sierra.madre.occidental.volcanics

Sierra Madre Occidental...

Sierra Madre Occidental is a major mountain range in Western Mexico that extends from near the Arizona-Sonora border in the north, all the way south to the Sierra Madre del Sur, near the Jalisco-Colima border. It is part of the American Cordillera, a chain of mountain ranges (cordilleras) that consists of an almost continuous sequence of mountain ranges that form the western 'backbone' of North America, Central America, South America, and Antarctica.

Geography

The Sierra Madre Occidental covers an approximate area of 280,000 square kilometers. It runs 1,250 kilometers from north to south and its width varies from 150 to 250 kilometers. The range's highest peak is the Cerro Mohinora, standing at 3,300 meters (10,827 ft) above sea level. This mountain range is characterized by its rugged terrain and deep river valleys. It is bounded on the east by the Mexican Plateau and on the west by the narrow coastal plain of the Gulf of California.

Flora and Fauna

The Sierra Madre Occidental is known for its vast biodiversity. It is home to several pine-oak forests, which harbor a wide array of species. Among the flora, there are numerous endemic and endangered species of plants. The fauna includes a variety of mammals such as the Mexican wolf, jaguar, and American black bear, as well as a rich diversity of bird species, making it a critical area for bird conservation.

Climate

The climate of the Sierra Madre Occidental varies significantly with elevation. Lower elevations experience a dry, desert-like climate, while higher elevations have a cooler, more temperate climate. The range acts as a barrier to the moist air coming from the Gulf of California and the Pacific Ocean, creating a rain shadow effect on the leeward side, which contributes to the arid conditions of the Mexican Plateau.

Human Impact and Conservation

Human activities, including logging, mining, and agriculture, have had significant impacts on the Sierra Madre Occidental's ecosystem. Deforestation is a major concern, as it leads to habitat loss for the region's diverse wildlife. Conservation efforts are underway to protect and preserve the unique biodiversity of this mountain range. Several protected areas and national parks have been established, but more efforts are needed to ensure the long-term conservation of this important ecological region.

Cultural Significance

The Sierra Madre Occidental has been home to various indigenous groups for thousands of years. These include the Rarámuri or Tarahumara, the Wixárika or Huichol, and the Tepehuan people. These communities have adapted to the mountainous terrain and have rich cultural traditions that are closely tied to the natural environment of the Sierra Madre Occidental.

See Also

• Sierra Madre Oriental
• Sierra Madre del Sur
• Mexican Plateau
• American Cordillera