…Originally, it meant only the former, but the definition was expanded to include all animals other than mammals, and to all plant bodies other than grass leaves, resulting in the latter meaning. In English, the terms grazers (animals that eat grass leaves) and browsers (animals that eat tree leaves) are sometimes used to distinguish between the two. There is also a usage between (1) and (2). … From [Intertidal Zone]…However, near the tip and surface of the seawater flowing up and down the intertidal zone, detritus and plankton are blown by wind and waves, and countless bubbles formed when waves crash against rocks act to granulate the organic matter dissolved in the seawater, making it usable as food for living things, making it possible for living things to obtain a sufficient amount of food in a short period of time. Next to filter feeders, the most common are herbivores (grazers), which nibble on tiny algae such as diatoms that grow on rocks, and these are mainly mobile snails. [Mukai Hiroshi]. … *Some of the terminology explanations that mention "grazer" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…本来は前者のみを意味するものであったが,一方では哺乳類以外の動物一般へ,一方では草の葉以外の植物体一般へと定義が拡張されて,後者の意味が生まれた。英語では草の葉食の動物grazersと木の葉食の動物browsersとを使い分けることもある。また,(1)と(2)の中間の用法もある。… 【潮間帯】より…けれども,潮間帯を上下する海水の先端付近および表面には,デトリタスやプランクトンが風や波で吹き寄せられたり,岩に波がぶつかることによってできる無数の泡が作用して,海水中に溶け込んでいた有機物を粒状化し,生物が餌として利用できる形にしていることもあって,短時間の摂餌で十分な量の餌をとることを可能にしている。ろ過食者の次に多いのが,岩盤上に生育しているケイ藻など微小な藻類をかじり取る草食者(グレーザーgrazer)であり,これは移動性の巻貝が中心である。【向井 宏】。… ※「grazer」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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