Hydrodynamic trails produced by Daphnia: size and energetics.
Hydrodynamic trails produced by Daphnia: size and energetics.
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DOI：
10.1371/journal.pone.0092383
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Lorke A
中科院分区：
文献类型：
--
作者：
Wickramarathna LN;Noss C;Lorke A
本研究的重点是量化自由游动的浮游动物产生的水动力足迹。我们结合体积跟踪的游泳轨迹与平面观察的流场引起的水蚤不同大小和不同的模式游泳。平面流场的空间延伸沿着的轨迹被用来询问的尺寸（长度和体积）和能量（动能耗散率和总耗散功率）的痕迹。我们的研究结果表明，无论是游泳模式，也没有影响的痕迹宽度或耗散率的生物体的大小。然而，我们发现，尾体积的增加与生物体的大小和游泳速度，更准确地说，尾体积的三次方的雷诺数成正比。这种增加进一步导致在更高雷诺数下显著增强的总耗散功率。观察到的最大足迹体积相当于最大水蚤身体体积的500倍。游动水蚤的尾流平均粘性耗散率在至之间变化，总耗散功率的观测值分别在和之间。在其他浮游动物物种中，水蚤在其踪迹中显示出最高的总耗散功率。这些研究结果进行了讨论的背景下，流体混合和运输的生物体游泳在中间雷诺数。
This study focuses on quantifying hydrodynamic trails produced by freely swimming zooplankton. We combined volumetric tracking of swimming trajectories with planar observations of the flow field induced by Daphnia of different size and swimming in different patterns. Spatial extension of the planar flow field along the trajectories was used to interrogate the dimensions (length and volume) and energetics (dissipation rate of kinetic energy and total dissipated power) of the trails. Our findings demonstrate that neither swimming pattern nor size of the organisms affect the trail width or the dissipation rate. However, we found that the trail volume increases with increasing organism size and swimming velocity, more precisely the trail volume is proportional to the third power of Reynolds number. This increase furthermore results in significantly enhanced total dissipated power at higher Reynolds number. The biggest trail volume observed corresponds to about 500 times the body volume of the largest daphnids. Trail-averaged viscous dissipation rate of the swimming daphnids vary in the range of to and the observed magnitudes of total dissipated power between and , respectively. Among other zooplankton species, daphnids display the highest total dissipated power in their trails. These findings are discussed in the context of fluid mixing and transport by organisms swimming at intermediate Reynolds numbers.
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影响因子：
2.1
作者：
Jiang, HS;Osborn, TR;Meneveau, C
通讯作者：
Meneveau, C
影响因子：
2.1
作者：
Gries, T;Jöhnk, K;Strickler, JR
通讯作者：
Strickler, JR
影响因子：
2.8
作者：
Jiang, Houshuo;Kiorboe, Thomas
通讯作者：
Kiorboe, Thomas
DOI：
10.1073/pnas.1116210109
发表时间：
2012-03-06
影响因子：
11.1
作者：
Doostmohammadi, Amin;Stocker, Roman;Ardekani, Arezoo M.
通讯作者：
Ardekani, Arezoo M.
影响因子：
8.6
作者：
Ardekani, A. M.;Stocker, R.
通讯作者：
Stocker, R.