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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Broad spectrum revolution ： ウィキペディア英語版 Broad spectrum revolution The Broad Spectrum Revolution (BSR) hypothesis, proposed by Kent Flannery in a 1968 paper presented to a London University symposium,〔Flannery 1969〕 suggested that the emergence of the Neolithic in southwest Asia was prefaced by increases in dietary breadth among foraging societies. The broad spectrum revolution followed the ice age around 15,000 BP in the Middle East and 12,000 BP in Europe. During this time, there was a transition from focusing on a few main food sources to gathering/hunting a "broad spectrum" of plants and animals. ==Hypothesis details== Flannery's hypothesis was meant to help explain the adoption of agriculture. Unpersuaded by "the facile explanation of prehistoric environmental change",〔Flannery 1969: 75〕 he suggested (following Lewis Binford's equilibrium model) that population growth in optimal habitats led to demographic pressure within nearby marginal habitats as daughter groups migrated. The search for more food within these marginal habitats forced foragers to diversify the types of food sources harvested, broadening the subsistence base outward to include more fish, small game, water fowl, invertebrates likes snails and shellfish, as well as previously ignored or marginal plant sources. Most importantly, Flannery argues that the need for more food in these marginal environments led to the deliberate cultivation of certain plant species, especially cereals. In optimal habitats, these plants naturally grew in relatively dense stands, but required human intervention in order to be efficiently harvested in marginal zones. Thus, the broad spectrum revolution set the stage for domestication and rise of permanent agricultural settlement. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Broad spectrum revolution」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.