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The Sierra Madre is the longest mountain range in the Philippines, running over 540 kilometers from the province of Cagayan in the north to Quezon province in the south, forming the eastern backbone of the island of Luzon. The name "Sierra Madre" means "mother of mountains" in Spanish. This range is a vital ecological and geographical feature, acting as a natural shield for the country.
Geography
Geography
The Sierra Madre extends along the Pacific coast of Luzon, creating a formidable barrier that separates the eastern coastal areas from the central plains. Its highest point is believed to be Mount Guiwan in Nueva Vizcaya, standing at 1,915 meters (6,283 feet). The range is bordered by the Pacific Ocean to the east and the Cagayan Valley, Central Luzon, and CALABARZON regions to the west. Its rugged terrain includes numerous peaks, valleys, and rivers. The Northern Sierra Madre Natural Park, a significant portion of the range, is the country's largest protected area and is home to diverse ecosystems, from lowland rainforests to montane forests.
Ecological Role
Ecological Role
The Sierra Madre is often called the "backbone of Luzon" due to its immense ecological significance. It hosts one of the largest remaining tracts of rainforest in the Philippines, accounting for about 40% of the nation's forest cover. The range is a biodiversity hotspot, home to thousands of plant and animal species, many of which are endemic to the Philippines, including the critically endangered Philippine eagle and the golden-crowned flying fox.
The mountain range serves as a critical watershed, with its forests providing a source for major river systems and dams that supply water for irrigation and hydroelectric power to millions of people in Central Luzon and the Cagayan Valley. Its dense forests also act as a natural carbon sink, absorbing carbon dioxide from the atmosphere and helping to regulate the climate.
Significance of Sierra Madre
Significance of Sierra Madre
The Sierra Madre's most significant role is as a natural barrier against typhoons and tropical cyclones that form over the Pacific Ocean. The range’s sheer size and elevation effectively slow down and weaken storms before they reach the highly populated inland areas of Luzon, reducing wind speed and deflecting powerful storm surges. This natural protection is crucial for saving lives, protecting infrastructure, and minimizing damage from natural disasters.
Unfortunately, the Sierra Madre is under constant threat from illegal logging, mining, and land conversion. These activities weaken the range's ability to act as a natural buffer, leading to increased risks of flooding, landslides, and greater devastation from storms. For the indigenous peoples, such as the Agta-Dumagat-Remontado, who have long considered the Sierra Madre their ancestral domain, the degradation of the forest also threatens their cultural survival and traditional way of life.
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