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The Northern Sierra Madre Natural Park is the largest protected area of the Philippines covering the northern range of the Sierra Madre mountains of eastern Luzon.〔(【引用サイトリンク】title=Northern Sierra Madre Natural Park and outlying areas inclusive of the buffer zone )〕 The park is located in the eastern part of the province of Isabela in Cagayan Valley (Region II) containing a total of .〔(【引用サイトリンク】title=Protected Areas in Region 2 )〕 It was first declared a wilderness reserve encompassing an area within a radius of Palanan Point known as the Palanan Wilderness Area through Letter of Instructions No. 917-A signed by President Ferdinand Marcos on 7 September 1979.〔(【引用サイトリンク】title=Letter of Instructions No. 917-A )〕 On 10 March 1997, the area was converted into a natural park with the signing of Proclamation No. 978 by President Fidel Ramos.〔(【引用サイトリンク】title=Proclamation No. 978 )〕 The park is considered the richest in terms of genetic, species and habitat diversity in the Philippines. It is one of the country's ten priority protected areas managed by its own Protected Area Management Board headed by the Regional Executive Director of the Department of Environment and Natural Resources for Region II under the rules set forth in Article III of Republic Act 9125, also known as the Northern Sierra Madre Natural Park (NSMNP) Act of 2001.〔〔(【引用サイトリンク】title=Republic Act No. 9125 )〕 In 2006, the protected area was added to the Philippines' tentative list of potential World Heritage Sites.〔 ==Geography== The Northern Sierra Madre Natural Park lies in the midsection of the Sierra Madre mountain range which stretches from the province of Aurora to Cagayan. It consists of of land area and of coastline water area corresponding geographically with the Isabela municipalities of Palanan, Divilacan and Maconacon, as well as portions of San Mariano, Dinapigue, San Pablo, Cabagan, Tumauini and the city of Ilagan.〔 It is bounded on the north by the Dikatayan River, on the south by the Disabungan River, on the west by Cagayan Valley, and on the east by the Philippine Sea.〔(【引用サイトリンク】title=Northern Sierra Madre Natural Park )〕 The park is characterized by high mountains with very steep slopes in the central portion of the range and relatively low hills with dominantly moderate steep slopes towards the coast. Mount Cresta on Sierra Madre's western flank is the highest peak in the park with an elevation of .〔 The second highest is Mount Divilacan with an elevation of located on its eastern flank.〔 Northern Sierra Madre is drained by 14 major river systems, 11 of which empty into the Philippine Sea and 3 flow into the Rio Grande de Cagayan as tributaries of the Ilagan River.〔 Palanan River, with a drainage area of or 29% of the park's total area, is the most extensive, followed by Abuan River and Catalangan River.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Northern Sierra Madre Natural Park」の詳細全文を読む スポンサード リンク
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