Why Plankton Modelers Should Reconsider Using Rectangular Hyperbolic (Michaelis-Menten,Monod) Descriptions of Predator-Prey Interactions
Why Plankton Modelers Should Reconsider Using Rectangular Hyperbolic (Michaelis-Menten,Monod) Descriptions of Predator-Prey Interactions
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DOI：
10.3389/fmars.2016.00165
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发表时间：
2016-01-01
影响因子：
3.7
通讯作者：
Mitra, Aditee
中科院分区：
文献类型：
--
作者：
Flynn, Kevin J.;Mitra, Aditee
矩形双曲型2（RHt2; Michaelis-Menten或Monod样）函数通常用于描述浮游生物模型中的捕食动力学，无论是单独还是与猎物选择性算法一起使用，该算法针对所有猎物类型部署相同的半饱和常数，参考外部猎物生物量丰度。我们提出了一个分析表明，这种描述是有可能给出的输出，是不合理的，根据相遇理论。对于多猎物类型的应用或在模拟期间对最大摄食率进行改变的情况尤其如此。RHT2的方法也没有或有限的潜力描述的事件，如真正的取消选择的猎物，遇到湍流的影响，或变化的食草动物运动与饱。我们提出了一种替代方案，它进行最小的参数化工作和计算成本，连接异速生长算法的猎物丰度和遭遇率的猎物选择功能控制饱。由此产生的饱和度控制的遭遇为基础（SCEB）功能提供了一个灵活的结构，描述数字捕食者-猎物的相互作用与生物量反馈控制放牧。SCEB函数包括一个类似于Holling圆盘方程的攻击分量，但SCEB的不同之处在于只有一个单一的（基于饱和度的）处理常数和一个明确的最大掠食率。我们认为，没有理由继续部署RHT2功能来描述浮游生物捕食者-猎物的相互作用。
Rectangular hyperbolic type 2 (RHt2; Michaelis-Menten or Monod-like) functions are commonly used to describe predation kinetics in plankton models, either alone or together with a prey selectivity algorithm deploying the same half-saturation constant for all prey types referenced to external prey biomass abundance. We present an analysis that indicates that such descriptions are liable to give outputs that are not plausible according to encounter theory. This is especially so for multi-prey type applications or where changes are made to the maximum feeding rate during a simulation. The RHt2 approach also gives no or limited potential for descriptions of events such as true de-selection of prey, effects of turbulence on encounters, or changes in grazer motility with satiation. We present an alternative, which carries minimal parameterization effort and computational cost, linking allometric algorithms relating prey abundance and encounter rates to a prey-selection function controlled by satiation. The resultant Satiation-Controlled-Encounter-Based (SCEB) function provides a flexible construct describing numeric predator-prey interactions with biomass-feedback control of grazing. The SCEB function includes an attack component similar to that in the Holling disk equation but SCEB differs in having only a single (satiation-based) handling constant and an explicit maximum grazing rate. We argue that there is no justification for continuing to deploy RHt2 functions to describe plankton predator-prey interactions.