0:00
during periods of low sea levels in the
0:01
past Southeast Asian regions including
0:02
islands like Sumatra Java Bali and
0:04
Borneo formed an extended land mass
0:06
known as sundaland or Sunda substantial
0:08
land bridges linked to this land mass
0:09
during the last glacial maximum around
0:10
20,000 years ago over time sundland
0:12
experienced sea level rises resulting in
0:13
a sea level increase of 120 M that
0:15
shaped the present day geographical
0:16
layout of Southeast Asia s comprise
0:18
regions like Australia New Guinea and
0:19
Tasmania connected during the last
0:20
glacial maximum due to lower sea levels
0:22
Walla is a transitional biogeographic
0:24
region between Sunda and sahul it is
0:25
bounded by two key biogeographic lines
0:27
Wallace's line to the west and ler line
0:28
to the East wall comprises a collection
0:30
of islands including sui lombok Flores
0:33
teor and the malakas and is
0:34
characterized by its distinct flora
0:36
fauna and geological history The W
0:38
Islands contain a mix of animals from
0:39
both regions including marsupial and
0:40
placental mammals each island having its
0:42
own unique combination of species to the
0:43
west of Wallis line ecosystems are
0:45
dominated by placental mammals while to
0:46
the east near australasia ecosystems are
0:47
mainly marsupial dominated the
0:49
separation of the Sunda and sahul land
0:50
masses by 60 miles of Wallace's line led
0:52
to the independent evolution of Asian
0:53
and Australian fauna Asia developed
0:55
placental mammals while sahul hosted
0:56
marsupials the island of Flores revealed
0:58
evidence of stegodon elephants and Homo
