Ricci N, Erra F, Russo A, Banchetti R
Dipartimento di Scienze dell'Ambiente e del Territorio, Pisa, Italy.
J Protozool. 1992 Jul-Aug;39(4):521-5. doi: 10.1111/j.1550-7408.1992.tb04843.x.
Interference with the water-air interface, both direct (by contact with a flat, rigid surface) and indirect (by inducing a meniscus) caused the ciliated protozoa we investigated to actively collect in the water column or on the substrate directly under the area of altered surface tension. A crowding effect is observed in this "rest area" reaching plateau values within one hour after onset of the experiment. The simple experimental procedures described here induced analogous behaviour in both Paramecium caudatum (a swimmer) and Oxytricha bifaria (a crawler). The ciliates seem in this reaction to be seeking a refuge from vibrations transmitted by the free interface. Our discovery is discussed in its implications for the adaptive biology and ecology of these micro-organisms.
对水 - 空气界面的干扰，包括直接干扰（通过与平坦、刚性表面接触）和间接干扰（通过诱导弯月面），导致我们所研究的纤毛原生动物在水柱中或在表面张力改变区域正下方的基质上主动聚集。在这个“休息区”观察到拥挤效应，实验开始后一小时内达到平稳值。这里描述的简单实验程序在尾草履虫（一种游泳者）和双叉棘尾虫（一种爬行者）中都诱发了类似行为。在这种反应中，纤毛虫似乎在寻求躲避由自由界面传递的振动。我们的发现就这些微生物的适应性生物学和生态学意义进行了讨论。
