Theoretical Ecology

article

Dual invasion analysis: a general model of novel ecological dynamics due to Bt product and resistant pests in wild settings

Paul R. Glaum

Theoretical Ecology > 2014 > 7 > 2 > 181-194

Transgenic Bt crops have been integrated as a central component of the agricultural policies of many nations across the globe due to their insecticidal properties. While focus on increased yield resulting from the use of Bt crops has overshadowed the concerns of pest populations developing resistance, resistance has been recently discovered in even highly managed fields. One issue that has received...

article

Restoration of plant–pollinator interaction networks via species translocation

Thomas LaBar, Colin Campbell, Suann Yang, Réka Albert, more

Theoretical Ecology > 2014 > 7 > 2 > 209-220

The recent decline in pollinator biodiversity, notably in the case of wild bee populations, puts both wild and agricultural ecosystems at risk of ecological community collapse. This has triggered calls for further study of these mutualistic communities in order to more effectively inform restoration of disturbed plant–pollinator communities. Here, we use a dynamic network model to test a variety of...

article

(A bit) Earlier or later is always better: Phenological shifts in consumer–resource interactions

Tomás A. Revilla, Francisco Encinas-Viso, Michel Loreau

Theoretical Ecology > 2014 > 7 > 2 > 149-162

Phenology is a crucial life history trait for species interactions and it can have great repercussions on the persistence of communities and ecosystems. Changes in phenology caused by climate change can disrupt species interactions causing decreases in consumer growth rates, as suggested by the match–mismatch hypothesis (MMH). However, it is still not clear what the long-term consequences of such...

article

Dynamics of herbivores and resources on a landscape with interspersed resources and refuges

Rongsong Liu, Donald L. DeAngelis, John P. Bryant

Theoretical Ecology > 2014 > 7 > 2 > 195-208

A tradeoff between energy gain from foraging and safety from predation in refuges is a common situation for many herbivores that are vulnerable to predation while foraging. This tradeoff affects the population dynamics of the plant–herbivore–predator interaction. A new functional response is derived based on the Holling type 2 functional response and the assumption that the herbivore can forage at...

article

Resource competition and community response to fertilization: the outcome depends on spatial strategies

Donald R. Schoolmaster, Gary G. Mittelbach, Katherine L. Gross

Theoretical Ecology > 2014 > 7 > 2 > 127-135

Decreases in plant species richness and shifts in community structure following fertilization are usually attributed to increasing light limitation. However, there is increasing evidence that light limitation alone does not account for all of the observed effects of fertilization on plant communities. We present a model of competition for a single, spatially heterogeneous resource that shows fertility-mediated...

article

Infectious disease in consumer populations: dynamic consequences of resource-mediated transmission and infectiousness

Paul J. Hurtado, Spencer R. Hall, Stephen P. Ellner

Theoretical Ecology > 2014 > 7 > 2 > 163-179

Nonhost species can strongly affect the timing and progression of epidemics. One central interaction—between hosts, their resources, and parasites—remains surprisingly underdeveloped from a theoretical perspective. Furthermore, key epidemiological traits that govern disease spread are known to depend on resource density. We tackle both issues here using models that fuse consumer–resource and epidemiological...

article

The effect of predator limitation on the dynamics of simple food chains

Christoph K. Schmitt, Stefan Schulz, Jonas Braun, Christian Guill, more

Theoretical Ecology > 2014 > 7 > 2 > 115-125

We investigate the influence of competition between predators on the dynamics of bitrophic predator–prey systems and of tritrophic food chains. Competition between predators is implemented either as interference competition, or as a density-dependent mortality rate. With interference competition, the paradox of enrichment is reduced or completely suppressed, but otherwise, the dynamical behavior of...

article

A quantitative genetic approach for predicting ecological change in biological communities

Benjamin J. Ridenhour, Scott L. Nuismer

Theoretical Ecology > 2014 > 7 > 2 > 137-148

Ecological studies of communities have become increasingly focused on the role of genetics. These studies often conclude that genetics and evolution play an important role in community structure and function. For instance, studies have shown that the structure of insect communities associated with a host plant is heritable and therefore can potentially evolve. However, when studying communities of...

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Theoretical Ecology

Dual invasion analysis: a general model of novel ecological dynamics due to Bt product and resistant pests in wild settings

Restoration of plant–pollinator interaction networks via species translocation

(A bit) Earlier or later is always better: Phenological shifts in consumer–resource interactions

Dynamics of herbivores and resources on a landscape with interspersed resources and refuges

Resource competition and community response to fertilization: the outcome depends on spatial strategies

Infectious disease in consumer populations: dynamic consequences of resource-mediated transmission and infectiousness

The effect of predator limitation on the dynamics of simple food chains

A quantitative genetic approach for predicting ecological change in biological communities

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