Simple predator-prey interactions control dynamics in a plankton food web model

被引：9

作者：

Cropp, Roger ^{[1
]}

Norbury, John ^{[2
]}

机构：

[1] Griffith Univ, Ctr Environm Syst Res, Griffith Sch Environm, Nathan, Qld 4111, Australia

[2] Univ Oxford, Inst Math, Oxford OX1 3LB, England

来源：

ECOLOGICAL MODELLING | 2009年 / 220卷 / 13-14期

关键词：

Plankton modelling; Population dynamics; Kolmogorov systems; ECOSYSTEM-MODEL; BARENTS SEA; MARINE ECOSYSTEM; SOUTHERN-OCEAN; PHYTOPLANKTON; STABILITY; NITROGEN; CLIMATE; BLOOM; CHAIN;

D O I：

10.1016/j.ecolmodel.2009.04.003

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

A plankton food web model is analysed using interaction parameter values appropriate to the upper mixed layer of the high latitude oceans. The dynamics of this four-variable system are analysed in terms of the dynamics of much simpler two-variable predator-prey subsystems. Thus, the food web's robust, periodic, four-dimensional dynamics are explained by means of two-dimensional spirals and limit cycles. These dynamical subsystems are coupled by means of an omnivore that transfers control of the dynamics between the two predator-prey subsystems. The food web may substantially decouple the predator-prey subsystems so that the oscillating phytoplankton/zooplankton blooms exhibit population collapses when bacterial 'breathers' briefly dominate after growing dramatically from low background levels. This regular bloom/breather behaviour becomes benignly chaotic when the system is mildly forced by the annual cycle of the sun's irradiance. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.

引用

页码：1552 / 1565

页数：14

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