Contrasting dynamics in the same plant-herbivore interaction.

Dynamics of a discrete-time plant-herbivore model

The Influence of Plant and Herbivore Characteristics on the Interaction between Induced Resistance and Herbivore Population Dynamics.

Induced plant resistance may contribute to regulating or driving fluctuations in insect herbivore populations. However, experimental demonstrations of induced resistance affecting long-term herbivore population dynamics are lacking, and few models find that induced resistance drives cycles in herbivore populations. Here a simulation model is used to explore the influence of characteristics of t...

Noise and seasonal effects on the dynamics of plant-herbivore models with monotonic plant growth functions

We formulate general plant-herbivore interaction models with monotone plant growth functions (rates). We study the impact of monotone plant growth functions in general plant-herbivore models on their dynamics. Our study shows that all monotone plant growth models generate a unique interior equilibrium and they are uniform persistent under certain range of parameters values. However, if the atta...

Relative impacts of environmental variation and evolutionary history on the nestedness and modularity of tree–herbivore networks

Nestedness and modularity are measures of ecological networks whose causative effects are little understood. We analyzed antagonistic plant-herbivore bipartite networks using common gardens in two contrasting environments comprised of aspen trees with differing evolutionary histories of defence against herbivores. These networks were tightly connected owing to a high level of specialization of ...

Monotone boundary dynamics generate a unique interior equilibrium and burst in general plant-herbivore models

We investigate two general plant-herbivore models: The 1st model involves a single plant species that has an increasing population dynamics with a decreasing growth function, while the 2nd model has a Holling type III function as its plant’s population dynamics. One key feature of these two models is that the boundary dynamics generate a unique interior equilibrium. The interior equilibrium goe...