Arthur George Tansley (1871-1955)

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He was an English botanist and a pioneer in the science of ecology. He founded the New Phytologist in 1902 and served as its editor until 1931. Tansley was a pioneer of the science of ecology in Britain, being heavily influenced by the work of Danish botanist Eugenius Warming, and introduced the concept of the ecosystem into biology. Tansley was a founding member of the first professional society of ecologists. 

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By: José Alberto De León Ayala