Lake Leonard
Encyclopedia
Lake Leonard is a small freshwater crater lake in Mount Leonard (also known as Leonard Kniaseff
), an andesitic-to-dacitic stratovolcano complex in the Leonard Mountain Range which is located 60 km northeast of Davao City
, Davao del Norte Province, Philippines.
are also found in the Amacan-Gopod thermal area south of the lake. The Manat thermal area is located north of Lake Leonard.
and logging. The disposal of mine tailings is also having a direct adverse impact on the lake's resources. The existing Philippine crocodile
(Crocodylus mindorensis) population in the lake is endangered because of the present intensity of human activities; the major threats to the species are accelerated siltation in the lake, poaching, pesticides pollution and the destruction of the natural vegetation on the lake shore.
Leonard Kniaseff
Leonard Kniazeff is a stratovolcano located in the Compostela Valley, within the province of Davao del Norte, Island of Mindanao, Philippines.It has a 203 km diameter caldera lake called Lake Leonard...
), an andesitic-to-dacitic stratovolcano complex in the Leonard Mountain Range which is located 60 km northeast of Davao City
Davao City
The City of Davao is the largest city in the island of Mindanao in the Philippines. Its international airport and seaports are among the busiest cargo hubs in the Philippines....
, Davao del Norte Province, Philippines.
Origin
Volcanic activity began 1.1 million years ago in the area and a series of lava domes in the region surrounding the lake were created in about 290,000 years ago. One of the biggest of these domes collapsed leaving a caldera that in time filled with water and transformed into a freshwater lake capable of sustaining life. Solfataras (fumaroles that emits sulfuric gases) occurring on its southwest rim is evident that under this lake is a sleeping active volcano. Active solfataras, fumaroles, and hot springsHot Springs
Hot Springs may refer to:* Hot Springs, Arkansas** Hot Springs National Park, Arkansas*Hot Springs, California**Hot Springs, Lassen County, California**Hot Springs, Modoc County, California**Hot Springs, Placer County, California...
are also found in the Amacan-Gopod thermal area south of the lake. The Manat thermal area is located north of Lake Leonard.
Disturbances and threats
The edge of the lake is badly silted as a result of human activities on the upper slopes of the watershed, particularly road construction, shifting cultivationShifting cultivation
Shifting cultivation is an agricultural system in which plots of land are cultivated temporarily, then abandoned. This system often involves clearing of a piece of land followed by several years of wood harvesting or farming, until the soil loses fertility...
and logging. The disposal of mine tailings is also having a direct adverse impact on the lake's resources. The existing Philippine crocodile
Philippine crocodile
The Philippine crocodile is a crocodile found in the Philippines. It is also known as the Mindoro crocodile and the Philippine freshwater crocodile. In the Philippines, it is strictly prohibited to kill a crocodile, but its status is critically endangered from exploitation and unsustainable...
(Crocodylus mindorensis) population in the lake is endangered because of the present intensity of human activities; the major threats to the species are accelerated siltation in the lake, poaching, pesticides pollution and the destruction of the natural vegetation on the lake shore.