SIMULATING CHEMOSENSORY RESPONSES OF MARINE MICROORGANISMS
SIMULATING CHEMOSENSORY RESPONSES OF MARINE MICROORGANISMS
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DOI：
10.4319/lo.1987.32.6.1253
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发表时间：
1987-11-01
影响因子：
4.5
通讯作者：
JACKSON, GA
中科院分区：
文献类型：
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作者：
JACKSON, GA
我已经研究了化学感应相互作用的性质，在相关的水生生态系统的情况下，通过将实验室细菌的化学运动的模型到周围泄漏的微藻的细菌运动的蒙特卡罗模拟。我假设，浓度场的基板周围的一个电子束是由分子扩散。模拟和各种理论论证的结果暗示，存在半径> 2 μ m的最小生物体尺寸，细菌可以使用化学感觉响应找到该最小生物体尺寸。细菌最容易找到体积大、比泄漏率高的藻类。因为它的进食也涉及食物的化学感应，桡足类动物观察到的不能以小藻类为食也可能是它不能感知这种潜在食物的结果。由于缺乏远距离检测小生物体的感觉机制，这意味着对小生物体的感知必须默认涉及物理接触。这一推论与微型浮游动物摄食的过滤机制一致。
I have studied the nature of chemosensory interactions in situations relevant to aquatic ecosystems by incorporating a model of chemokinesis by laboratory bacteria into a Monte Carlo simulation of bacterial movement around leaky microalgae. I assumed that the concentration field of the substrate around an alga is determined by molecular diffusion. Results of simulations and various theoretical arguments imply that there is a smallest organism size with a radius > 2 .mu.m which bacteria can find using chemosensory responses. Bacteria most easily find algae that are large and have a high specific leakage rate. Because its feeding also involves chemosensing of food items, a copepod''s observed inability to feed on small algae may also be the result of its inability to sense this potential food. The lack of sensory mechanisms to detect small organisms at a distance implies that the sensing of small organisms must, by default, involve physical contact. This inference agrees with filtration mechanisms noted for microzooplankton feeding.