Stirring effects in models of oceanic plankton populations
Stirring effects in models of oceanic plankton populations
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DOI：
10.1063/1.4751329
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发表时间：
2012-09-01
期刊：
影响因子：
2.9
通讯作者：
Neufeld, Zoltan
中科院分区：
文献类型：
--
作者：
Neufeld, Zoltan
针对不同类型的生态系统模型，我们对大尺度海洋运输过程对浮游生物种群动态影响的研究成果进行了综述和推广。我们发现，在承载能力非均匀分布的环境中，增加搅拌速度会导致系统有效承载能力的整体下降。这可能会导致在具有多个稳态的系统中进行搅拌而引起的急剧的区域变化。在食饵-捕食者类型的系统中，搅拌导致种群动态对波动的共振反应，在一定的搅拌速度范围内，增强了空间变异性-斑块-。振荡种群模型在搅拌较弱时产生浮游生物水华的强烈非均质斑块分布，而较强的搅拌可以在非均质性相对较弱时使振荡动力学同步，或通过降低分叉点以下的有效承载能力来完全抑制振荡(振荡器死亡)。(C)2012年美国物理研究所。[http://dx.doi.org/10.1063/1.4751329]
We present an overview and extend previous results on the effects of large scale oceanic transport processes on plankton population dynamics, considering different types of ecosystem models. We find that increasing stirring rate in an environment where the carrying capacity is non-uniformly distributed leads to an overall decrease of the effective carrying capacity of the system. This may lead to sharp regime shifts induced by stirring in systems with multiple steady states. In prey-predator type systems, stirring leads to resonant response of the population dynamics to fluctuations enhancing the spatial variability-patchiness-in a certain range of stirring rates. Oscillatory population models produce strongly heterogeneous patchy distribution of plankton blooms when the stirring is weak, while strong stirring may either synchronise the oscillatory dynamics, when the inhomogeneity is relatively weak, or suppress oscillations completely ( oscillator death) by reducing the effective carrying capacity below the bifurcation point. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4751329]