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The Wallace line or Wallace's line is a faunal boundary line drawn in 1859 by the British naturalist Alfred Russel Wallace and named by the English biologist T.H. Huxley. It separates the biogeographical realms of Asia and ' Wallacea ', a transitional zone between Asia and Australia formerly also called the Malay Archipelago and the Indo ...
The Wallace Line, which runs between Borneo and Sulawesi, Bali and Lombok, is the dividing line. The portion of Indonesia west of the Wallace Line is known as the Sundaland bioregion, which also includes Malaysia and Brunei.
Wallacea is defined as the series of islands stretching between the two continental shelves of Sunda and Sahul, but excluding the Philippines.Its eastern border (separating Wallacea from Sahul) is represented by a zoogeographical boundary known as Lydekker's Line, while the Wallace Line (separating Wallacea from Sunda) defines its western border.
Indonesia divides into two ecological regions; western Indonesia which is more influenced by Asian fauna, and the east which is more influenced by Australasian species. The Wallace Line, around which lies the Wallacea transitional region, notionally divides the two regions. [2]
Nusa Lembongan is an island located southeast of Bali, Indonesia. It is part of a group of three islands that make up the Nusa Penida district, of which it is the most famous of the three islands of Nusa Penida, Nusa Lembongan, and Nusa Ceningan - known together as the "Nusa Islands". [1] This island group, in turn, is part of the Lesser Sunda ...
As described by Alfred Wallace in The Malay Archipelago, the Wallace Line passes between Bali and Lombok, along the deep waters of the Lombok Strait which formed a water barrier even when lower sea levels linked the now-separated islands and landmasses on either side.
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The island is to the immediate east of the Lombok Strait which marks the biogeographical division between the fauna of the Indomalayan realm and the distinctly different fauna of Australasia; this distinction, known as the "Wallace Line" (or "Wallace's Line") takes its name from Alfred Russel Wallace [16] (1823–1913), who was the first person ...