Parsing handling time into its components: implications for responses to a temperature gradient.

  title={Parsing handling time into its components: implications for responses to a temperature gradient.},
  author={Arnaud Sentis and Jean-Louis Hemptinne and Jacques Brodeur},
  volume={94 8},
The functional response is a key element of predator-prey interactions, and variations in its parameters influence interaction strength and population dynamics. Recent studies have used the equation of the metabolic theory of ecology (MTE) to quantify the effect of temperature on the parameter Th, called "handling time," and then predict the responses of predators and communities to climate change. However, our understanding of the processes behind Th and how they vary with temperature remains… 

Figures and Tables from this paper

On the mechanistic understanding of predator feeding behavior using the functional response concept

The results show that the SSS equation is viable and can realistically describe type II functional response and investigate the mechanistic basis of the S SS equation, comparing the model ’ s predictions with directly observed data.

Experimental duration and predator satiation levels systematically affect functional response parameters

Analyzing a large data set covering a wide range of predator taxonomies and body sizes, it is shown that attack rates decrease with increasing experimental duration, and that handling times of starved predators are consistently shorter than those of satiated predators.

Thermal acclimation modulates the impacts of temperature and enrichment on trophic interaction strengths and population dynamics

The experimental results show that thermal acclimation can buffer negative impacts of environmental change on predators and increase food-web stability and persistence and the effect of acclimations and, more generally, phenotypic plasticity on trophic interactions should not be overlooked.

Short‐term thermal acclimation modulates predator functional response

Abstract Phenotypic plastic responses to temperature can modulate the kinetic effects of temperature on biological rates and traits and thus play an important role for species adaptation to climate

Temperature Affects Chemical Defense in a Mite-Beetle Predator-Prey System

This work investigates how environmental temperature affects the regeneration of defensive secretions and influences the efficacy of chemical defense in a model predator-prey system: the oribatid mite Archegozetes longisetosus and the predaceous rove beetle Stenus juno.

Heated Relations: Temperature-Mediated Shifts in Consumption across Trophic Levels

The results exemplify how the relative forces of top-down control exerted by herbivores and carnivores may strongly shift under global warming.

Predators like it hot: Thermal mismatch in a predator-prey system across an elevational tropical gradient.

The magnitude of interspecific mismatch in maximum (CTmax ) and minimum (CTmin ) thermal tolerances among a predator-prey system of dragonfly and anuran larvae in tropical montane and habitat (ponds and streams) gradients is quantified.

Warming drives higher rates of prey consumption and increases rates of intraguild predation

Warming due to climate change is expected to alter species interactions. These interactions are shaped by components of individual behavior, particularly foraging behaviors. However, few studies

Warming drives higher rates of prey consumption and increases rates of intraguild predation

The results provide evidence that IGP interactions may be greatly affected by future increases in temperature; however, activity responses to warming alone are weak predictors of the outcomes of these interactions.

The Effects of Warming on Aquatic Insects - Individual to Community Responses

Climate change is increasing temperatures globally as well as the frequency and severity of extreme events such as heat waves. Given that the majority of animals on Earth are ectothermic, and

Warming up the system: higher predator feeding rates but lower energetic efficiencies

Environmental warming generally increases the direct short-term per capita interaction strengths between predators and their prey as described by functional-response models, which implies that warming of natural ecosystems may dampen predator–prey oscillations thus stabilizing their dynamics.

Variation in universal temperature dependence of biological rates

Dell et al. (7) present a massive compilation of RT data, evaluate quantitative predictions of MTE, and analyze systematic patterns of variation in temperature sensitivity of biological traits.

Temperature, predator–prey interaction strength and population stability

The results suggest that warming has complex and potentially profound effects on predator–prey interactions and food-web stability, and suggests an increase in perturbation stability of populations.

Temperature dependence of the functional response.

It is concluded that the use of the Arrhenius equation to describe consumption in predator-prey models requires the assumption that temperatures above thermal optima are unimportant for population and community dynamics, an assumption that is untenable given the available data.

Universal temperature and body-mass scaling of feeding rates

These body-mass- and temperature-scaling models remain useful as a mechanistic basis for predicting the consequences of warming for interaction strengths, population dynamics and network stability across communities differing in their size structure.

Predicting the effects of temperature on food web connectance

A model of how temperature affects food web connectance, a powerful driver of population dynamics and community structure, is developed using the Arrhenius equation to add temperature dependence of foraging traits to an existing model of food web structure.

A Mechanistic Approach for Modeling Temperature‐Dependent Consumer‐Resource Dynamics

This work addresses problems of tractability and plausibility in community/environment models by incorporating the Boltzmann factor (temperature dependence) in a bioenergetic consumer‐resource framework and leads to three predictions for the response of consumer‐ resource systems to increasing mean temperature (warming).

Systematic variation in the temperature dependence of physiological and ecological traits

Analysis of the rising component of within-species (intraspecific) responses reveals that 87% are fit well by the Boltzmann–Arrhenius model, and generalities and deviations in the thermal response of biological traits help to provide a basis to predict better how biological systems, from cells to communities, respond to temperature change.


A handy mechanistic functional response model that realistically incorporates handling and digesting prey and may improve optimal foraging theory, since one of its major problems has been the lack of alternative models.

Digestively constrained predators evade the cost of interference competition

Four competing models are proposed that differ in whether predators interfere and whether they face a digestive constraint, and it is suggested that digestive constraints allow red knots to live in dense flocks: if digestion proceeds during interference interactions, the time-cost of interference may be negligible.