A term for seaweed. In addition to algae that grow in freshwater rivers, lakes, marshes, and puddles, it also includes aerial algae that grow on tree trunks, rocks, soil, moss, and other places with some moisture, snow algae that grow on ice and snow, hot spring algae that grow in hot springs, and even symbiotic algae that live in symbiosis with animals (corals and green paramecium), plants (azolla), fungi, and lichens. As such, there are great differences in the environments in which freshwater algae grow, but it is common for species to be found that are adapted to each environment. Brown algae and red algae are mainly found in the sea, and only a limited number of species are found in freshwater, but green algae and diatoms are found in both marine and freshwater environments, and euglena are found in freshwater. [Hiroshi Kobayashi] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
海藻に対する語。淡水の河川、湖沼、湿地、水たまりに生育する藻類のほか、樹幹、岩石、土壌、コケなどの多少とも湿気のある所に生える気生藻、氷や雪の上に生える氷雪藻、温泉に生える温泉藻、さらには、動物(サンゴやミドリゾウリムシ)、植物(アカウキクサ)、菌類、地衣類と共生している共生藻などが含められる。このように淡水藻の生育する環境には大きな差異がみられるが、それぞれの環境には、そこに適応した種類がみられるのが普通である。褐藻類や紅藻類はおもに海産で、淡水にはごく限られた種類がみられるのみであるが、緑藻類、珪藻(けいそう)類などは両方に産し、ミドリムシ類は淡水産である。 [小林 弘] 出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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