…If these relationships are illustrated and stacked from the lowest trophic level (those preyed upon) to the highest (those predators), they form a pyramid. This is called the "pyramid of population" or "Elton's pyramid" because it was proposed by the British ecologist CS Elton in 1927 with a focus on population numbers. The pyramid of population numbers is inverted in cases such as the relationship between a tree and the many insects that feed on its leaves and wood (grazing chain), or the relationship between a parasite and its host (parasitism chain). … *Some of the terminology that refers to "Elton's Pyramid" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…こうした関係を図にして栄養段階の低いもの(食われる方)から高いもの(食う方)へと順次積み上げるとピラミッド型となる。これは,イギリスの生態学者C.S.エルトンが1927年に個体数に着目して提案したので,〈個体数のピラミッド〉または〈エルトンのピラミッド〉と呼ばれている。個体数のピラミッドでは,樹木とその葉や材を食う多数の昆虫の関係(生食連鎖)や,寄生虫と宿主の関係(寄生連鎖)などの場合では倒立する。… ※「エルトンのピラミッド」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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