底泥(Sediment) 通常是黏土、泥沙、有机质及各种矿物的混合物,经过长时间物理、化学及生物等作用及水体传输而沉积于水体底部所形成。表面0至15公分厚之底泥称表层底泥(Surface sediment),超过15公分厚之底泥称为深层底泥(Deep sediment)。
并非所有的鲶鱼都是生来平等的:我们倾向于认为鲶鱼是黏糊糊的食底泥动物,但那只适用于一小部分物种。
Not all catfish are created equal: we tend to think of catfish as slimy bottom feeders, but that is only true for a small percentage of species.
这些澳大利亚哺乳动物是食底泥动物。
结果表明,芽孢杆菌制剂改变了虾池底泥细菌类群组成,增加了底泥好氧细菌的数量。
The results showed that the probiotic Bacillus changed bacterial species composition of sediment and increased the number of aerobic bacteria.
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