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Null models, admittedly difficult to perfect, are in use, and, although a leading conservation scientist recently lauded island biogeography theory as "one of the most elegant and important theories in contemporary ecology, towering above thousands of lesser ideas and concept", he nevertheless finds that "the species-area curve is a blunt tool ...
The field was founded on conservation issues but has broadened in scope to include more general social and scientific history and may deal with cities, population or sustainable development. As all history occurs in the natural world, environmental history tends to focus on particular time-scales, geographic regions, or key themes.
1935 — Soil Conservation and Domestic Allotment Act. — The Wilderness Society is founded. 1936 — The National Wildlife Federation is founded. 1939 — The insecticidal properties of DDT discovered by Paul Hermann Müller, who was awarded the 1948 Nobel Prize in Physiology and Medicine for his efforts. The first ban on its use came in 1970.
Daniel Hunt Janzen (born January 18, 1939, in Milwaukee, Wisconsin [1]) is an American evolutionary ecologist and conservationist.He divides his time between his professorship in biology at the University of Pennsylvania, where he is the DiMaura Professor of Conservation Biology, and his research and field work in Costa Rica.
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Sir Arthur George Tansley FLS, FRS [1] (15 August 1871 – 25 November 1955) was an English botanist and a pioneer in the science of ecology. [2]Educated at Highgate School, University College London and Trinity College, Cambridge, Tansley taught at these universities and at Oxford, where he served as Sherardian Professor of Botany until his retirement in 1937.
The disruption of food webs may have a dramatic impact on the ecology of individual species or whole ecosystems. For instance, the replacement of an ant species by another (invasive) ant species has been shown to affect how elephants reduce tree cover and thus the predation of lions on zebras .
The translation of Warming's term into English as "Oecology" led to Cowles becoming one of the primary popularizers of the term ecology in the United States. Cowles was one of the founding members of the Ecological Society of America in 1915. [10] Cowles married Elizabeth Waller in 1900, and their daughter Harriet was born in 1912.