Chemosensory guidance cues in a turbulent chemical odor plume
Chemosensory guidance cues in a turbulent chemical odor plume
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湍流化学气味羽流中的化学感应引导线索
DOI：
10.4319/lo.2001.46.5.1034
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发表时间：
2001
影响因子：
4.5
通讯作者：
M. Weissburg
中科院分区：
文献类型：
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作者：
Donald R. Webster;M. Weissburg
在化学羽流跟踪的背景下，对释放到湍流明渠流动中的化学气味羽流的特征进行了评估。目的是评估化学感官线索对试图在羽流中定向的动物(如底栖甲壳类动物)的可用性和有用性。将荧光染料释放到实验室规模的大型水槽的充分发展的湍流边界层中，产生了湍流气味羽流。不同的释放速度、与床层的释放距离和喷嘴直径所产生的气味场的流动可视化表明，羽流中的化学传感线索取决于释放特性以及周围的流动条件。因此，为了了解动物的行为，量化羽流的释放特性和特征是很重要的。我们选择使用平面激光诱导荧光技术来量化等速释放情况下的浓度场。这些测量表明，时间平均浓度收敛得太慢，对觅食动物来说是有用的。同样，解决集中暴发的上升斜率需要动物无法获得的采样率，并且上升斜率的空间变化太温和，如果没有较长的采样周期就无法跟踪。此外，浓度暴发的幅度和持续时间仅随距离震源的距离而有轻微的变化。因此，时间平均浓度、上升斜率和爆发形状对于已知能够有效定向到这些类型的气味来源的动物的羽流方向的有用性似乎都是有限的。
The characteristics of chemical odor plumes released into a turbulent open channel flow are evaluated in the context of chemical plume tracking. The objective is to assess the availability and usefulness of chemosensory cues to animals, such as benthic crustaceans, attempting to orient in the plume. Releasing fluorescent dye into the fully developed turbulent boundary layer of a large laboratory‐scale flume created turbulent odor plumes. Flow visualization of odor fields created with varying release velocity, release distance from the bed, and nozzle diameter indicated that chemosensory cues in plumes depend on the release characteristics as well as the ambient flow conditions. Thus, to understand animal behavior, it is important to quantify the plume release properties and characteristics. We chose to quantify concentration fields for the case of isokinetic release using the planar laser‐induced fluorescence technique. These measurements indicate that the time‐averaged concentration converges far too slowly to be useful to a foraging animal. Similarly, resolving the rise slope of a concentration burst requires sampling rates unattainable by animals, and the spatial variation of rise slope is too mild to follow without lengthy sampling periods. In addition, only mild variation with distance from the source is observed in the concentration burst magnitude and duration. Thus, the time‐averaged concentration, rise slope, and burst shape all appear to have limited usefulness for plume orientation for animals known to orient effectively to these types of odor sources.
DOI：
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发表时间：
1994-12
期刊：
The Journal of experimental biology
影响因子：
--
作者：
M. Weissburg;R. K. Zimmer-Faust
通讯作者：
M. Weissburg;R. K. Zimmer-Faust