AP Environmental Science
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Durio Dulcis 

Durian Meragang

Durian trees are extremely tropical and native to the rainforests of Southeast Asia. They require much warmth and sunshine, as well as abundant moisture, but are also tolerant of relatively low temperatures.  Durians favor areas of flat or steep terrain with rich, well-drained sandy clays as they are sensitive to standing water. The evergreen leaves range from two to ten inches long and grow alternately on branches. Because their seeds are already contained in a package of fertilizer, it only relies on the depositing of seeds from animals. The flowers of a durian tree release strong odors that are especially attractive to dawn bats. These flowers consist of both a stamen and a pistil, making them hermaphrodites, hence their dependence on the bats for pollination. Dawn bats share a mutual relationship with the tree and without the assistance of these bats, the tree cannot bear fruit.The fruit is the most essential part of the durian, which holds about five seeds that are surrounded by a fleshy outside covering, also known as the aril. The aroma of the fruit lures animals into consuming the meal; however, due to the great size of its seeds, durians must rely on larger animals such as rhinoceros and elephants for feeding and dispersion. The trunk of the tree also plays a role in its survival by peeling its bark regularly, preventing epiphytes, lianas, and parasitic vines from growing on it.


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