1/17/2024 0 Comments Naturalist alfred russel wallace![]() ![]() There are many reasons why different species are found on each side of the Wallace Line. What Animals Does The Wallace Line Separate? The company is expanding its open access offering in order to give as many people as possible the ability to view and download content we publish. Our core businesses publish scientific, technical, medical, and scholarly journals, reference works, books, databases, and online applications. Plant, animal, and systematic groups are all accepted as valid models and tools.įor more than 200 years, the John Wiley Company has provided readers with a valuable source of information and insight. ‘ What is naturalness?’, philosophical and methodological debates, implications of ecosystem fragmentation, the impact of human-induced changes, and biodiversity’s ecological and economic significance are just a few of the topics covered. The Journal of Biogeography is the ‘gold standard’ reference for environmentalists, biogeographers, ecologists, biologists, botanists, and zoologists. Surprisingly, the genetic split was found to be geographical in origin, indicating a major division east-west similar to the Wallace’s Line in nature. There were two distinct lineages that diverged by an average of 2.9% over a ten-year period. This study analyzed the DNA of 100 individuals from the Hippocampus trimaculatus Leach (three-spot seahorse) for the year 1814. The boundary between the two regions is therefore a classic example of an evolutionary divide. Over time, the animals on either side of the Wallace Line have become increasingly different, due to the different climatic and environmental conditions in each region. This land bridge allowed animals to travel between the two regions, leading to the mixing of the faunas. The Australian plate collided with the Southeast Asian plate around 50 million years ago, pushing up the mountains that now form the Malay Peninsula and creating a land bridge between the two regions. The boundary between these two regions is thought to have been formed by the process of plate tectonics. The eastern side, by contrast, is home to a greater diversity of reptiles and amphibians, as well as many birds. ![]() The western side is home to a diversity of animals, including many marsupials and rodents, that are not found on the eastern side. ![]() The Wallace Line is notable for the marked difference in the animal life on either side of it. Wallacea includes the Indonesian islands of Sulawesi, the Philippines, and the eastern part of New Guinea, while Australasia includes the rest of New Guinea, Australia, Tasmania, and New Zealand. The line runs between the islands of Bali and Lombok in Indonesia, and marks the boundary between the zoogeographical regions of Wallacea to the west and Australasia to the east. It is named after British naturalist Alfred Russel Wallace, who was the first to recognise the distinction between the fauna of Australasia and that of Southeast Asia. Specimens marked with a red dot were collected by Wallace during his travels to Amboyna (1859) and Batchian (1858–59).The Wallace Line is a biogeographical boundary that runs through the Malay Archipelago. These are from the Museum’s extensive butterfly collection. A drawer of Ulysses butterflies ( Papilio ulysses) Darwin had been working on his theory for twenty years, and here was an outline of that same idea, written by a relative unknown. In 1858, Wallace published On the Tendency of Varieties to Depart Indefinitely from the Original Type, prompting Darwin to publish On the Origin of Species the following year. Although now less famous than his contemporary and correspondent Charles Darwin, the self-taught Wallace arrived independently at a theory of the evolution of species by natural selection. This display celebrates Wallace’s long association with the Museum and its collections.Īlfred Russel Wallace (1823–1913) was a scientific and social thinker, early biogeographer and ecologist. Thursday 7 November 2013 marks the centenary of the death of Alfred Russel Wallace, one of the 19th century’s greatest explorers and naturalists.
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