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Food web functional responses

FRONTIERS IN ECOLOGY AND EVOLUTION (2022)

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Article Ecology

Towards a modular theory of trophic interactions

Kate L. Wootton et al.

Summary: Species traits and environmental conditions play a crucial role in determining trophic interactions. Understanding the relationship between these factors can help in making accurate predictions and developing better models. A modular approach is proposed for selecting relevant steps and building specific models for trophic interactions.

FUNCTIONAL ECOLOGY (2023)

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Article Multidisciplinary Sciences

Fear of predators in free-living wildlife reduces population growth over generations

Marek C. Allen et al.

Summary: This study demonstrates that fear itself can significantly impact prey population growth rates in free-living wildlife, potentially constituting a considerable part of the total impact of predators.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2022)

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Article Ecology

A mechanistic model of functional response provides new insights into indirect interactions among arctic tundra prey

Andreanne Beardsell et al.

Summary: Research shows that in the arctic tundra, changes in predator foraging behavior in response to prey density play a significant role in generating positive indirect effects between prey that share a predator.

ECOLOGY (2022)

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Article Ecology

FoRAGE database: A compilation of functional responses for consumers and parasitoids

Stella F. Uiterwaal et al.

Summary: Functional responses, which describe the relationship between consumer foraging rate and resource density, play a crucial role in understanding consumer-resource interactions and population dynamics. This study presents a global database of standardized functional responses and parameters, covering a wide range of consumer and resource species. The database provides valuable data for future research on ecological interactions.

ECOLOGY (2022)

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Article Ecology

Evolution of prudent predation in complex food webs

Orestes U. Gutierrez Al-Khudhairy et al.

Summary: Prudent predation, as a result of consumer-mediated competition for resources, has been shown to explain phenomena such as unexpected declines of invasive species and the shape of fish recruitment curves. This theory has significant research value.

ECOLOGY LETTERS (2022)

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Article Multidisciplinary Sciences

Assassin snails (Anentome helena) as a biological model for exploring the effects of individual specialisation within generalist predators

Boris W. Berkhout et al.

Summary: Quantifying feeding behavior of generalist predators is crucial for understanding food webs. In this study, we used the freshwater predaceous snail Anentome helena to investigate the feeding patterns of a generalist predator on multiple food types. The results showed consistent feeding patterns and individual specialization in prey selection. This research contributes to the ongoing debate on the classification of predator species into generalists and specialists.

PLOS ONE (2022)

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Article Ecology

The Issue Isn't Which Model of Consumer Interference Is Right, but Which One Is Least Wrong

Lev R. Ginzburg et al.

Summary: This article discusses the ongoing debate about the default choice for types of functional responses based on consumer interference, using empirical observations and an analogy with the history of ballistics. It argues that the ratio-dependent model coincides more naturally with population dynamics and is more consistent with empirical observations. The article also compares this debate to the developments in physics 400 years ago, where Galileo's parabolic trajectory replaced the dominant root model since Aristotle.

FRONTIERS IN ECOLOGY AND EVOLUTION (2022)

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Article Ecology

Predation in Many Dimensions: Spatial Context Is Important for Meaningful Functional Response Experiments

Steven A. Juliano et al.

Summary: Functional response experiments often use environments with simple physical structure and small size, but pay less attention to the similarity of the experimental environment to the natural environment. This article demonstrates how assumptions about predator and prey use of space can affect the conclusions of an experiment on functional response. The authors suggest that using larger experimental spaces that represent the complexity of natural environments would improve functional response experiments and lead to a more complete understanding of quantitative aspects of predation.

FRONTIERS IN ECOLOGY AND EVOLUTION (2022)

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Article Ecology

Functional Responses Shape Node and Network Level Properties of a Simplified Boreal Food Web

Jenilee Gobin et al.

Summary: Ecological communities are connected through complex trophic interactions that vary across predators and prey. However, obtaining empirical data to characterize these relationships in natural systems is challenging. This study shows that relying solely on hyperbolic functional responses fails to capture important ecological interactions and affects estimates of food web properties and dynamics. More comprehensive research is needed to understand the mechanistic link between food web structure and community dynamics.

FRONTIERS IN ECOLOGY AND EVOLUTION (2022)

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Article Ecology

Hidden layers of density dependence in consumer feeding rates

Daniel B. Stouffer et al.

Summary: This study demonstrates that the classic resource- and consumer-dependent functional-response models often make strong and untenable assumptions about the independence of processes underlying feeding rates. By quantifying non-independence between consumer feeding and interference, as well as between feeding on multiple resources, the research reveals hidden forms of density dependence and provides a new perspective on understanding variation in consumer feeding rates.

ECOLOGY LETTERS (2021)

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Review Ecology

Systematic bias in studies of consumer functional responses

Mark Novak et al.

Summary: Functional responses are crucial in understanding consumer-resource interactions, and the debate on how to accurately model them continues. Research reveals that there is a systematic bias in the statistical comparison of functional-response models and the estimation of their parameters due to a lack of replication. The study emphasizes the need for clarity in defining the varied purposes of studying functional responses to guide experimental design, analysis, and interpretation.

ECOLOGY LETTERS (2021)

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Review Ecology

Ratio-Dependence in Predator-Prey Systems as an Edge and Basic Minimal Model of Predator Interference

Yuri V. Tyutyunov et al.

Summary: The concept of functional response quantifies the average prey consumption by a single predator over time. Different types of functional responses have been suggested, with Arditi and Ginzburg proposing a spectrum of predator-dependent trophic functions to address contradictions between theory and observations. By incorporating predator interference, the ratio-dependent edge of the spectrum offers a simple way to account for mutual interference in predator-prey models.

FRONTIERS IN ECOLOGY AND EVOLUTION (2021)

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Article Ecology

Geometric Complexity and the Information-Theoretic Comparison of Functional-Response Models

Mark Novak et al.

Summary: The evaluation of functional response models using AIC and BIC penalizes fit based on parametric complexity but does not consider geometric complexity. Experimental design influences a model's geometric complexity and a lack of appreciation for model flexibility may lead to biased inferences.

FRONTIERS IN ECOLOGY AND EVOLUTION (2021)

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Article Multidisciplinary Sciences

Increasing availability of palatable prey induces predator-dependence and increases predation on unpalatable prey

Thomas J. Hossie et al.

Summary: Using a dragonfly nymph-tadpole system, researchers experimentally manipulated predator density, prey density, and prey species ratio to investigate predator interference and optimal diet theory. The study found that prey selection was not influenced by changes in prey type abundance, but rather depended on the characteristics of the prey types involved.

SCIENTIFIC REPORTS (2021)

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Article Ecology

Recolonizing carnivores: Is cougar predation behaviorally mediated by bears?

Kristin N. Engebretsen et al.

Summary: Conservation efforts have led to population increases and range expansions for some apex predators, impacting trophic cascades and foraging behavior. The recolonization of black bears in the Great Basin has influenced cougar foraging behavior, with higher bear densities reducing feeding bout durations and altering prey selection. Such interactions highlight the importance of studying the impacts of sympatric apex predators and dominant scavengers on shared resources in dynamic multipredator/scavenger systems.

ECOLOGY AND EVOLUTION (2021)

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Article Ecology

Trait-Based Variation in the Foraging Performance of Individuals

John P. DeLong et al.

Summary: Individual variation in foraging rates may play a crucial role in determining the effects of predator-prey interactions on communities. In a study involving wolf spiders foraging on fruit flies, it was found that there is substantial trait variation between males and females, but this did not clearly relate to differences in functional response. Body mass interacting with body rotations was identified as a key factor influencing foraging performance.

FRONTIERS IN ECOLOGY AND EVOLUTION (2021)

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Article Ecology

Life at the top: Lake ecotype influences the foraging pattern, metabolic costs and life history of an apex fish predator

Liset Cruz-Font et al.

JOURNAL OF ANIMAL ECOLOGY (2019)

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Article Ecology

False Exclusion: A Case to Embed Predator Performance in Classical Population Models

David J. S. Montagnes et al.

AMERICAN NATURALIST (2019)

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Article Biodiversity Conservation

Multiple factors, including arena size, shape the functional responses of ladybird beetles

Stella F. Uiterwaal et al.

JOURNAL OF APPLIED ECOLOGY (2018)

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Article Ecology

Experimental duration and predator satiation levels systematically affect functional response parameters

Yuanheng Li et al.

OIKOS (2018)

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Article Ecology

The golden age of bio-logging: how animal-borne sensors are advancing the frontiers of ecology

Christopher C. Wilmers et al.

ECOLOGY (2015)

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Review Biology

Why ratio dependence is (still) a bad model of predation

Peter A. Abrams

BIOLOGICAL REVIEWS (2015)

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Review Ecology

Functional responses and predator-prey models: a critique of ratio dependence

Frederic Barraquand

THEORETICAL ECOLOGY (2014)

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Article Ecology

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

Rongsong Liu et al.

THEORETICAL ECOLOGY (2014)

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Article Biology

A generalized functional response for predators that switch between multiple prey species

E. van Leeuwen et al.

JOURNAL OF THEORETICAL BIOLOGY (2013)

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Article Biology

Direct plant-predator interactions as determinants of food chain dynamics

Robert D. Holt et al.

JOURNAL OF THEORETICAL BIOLOGY (2013)

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Review Ecology

Implications of flexible foraging for interspecific interactions: lessons from simple models

Peter A. Abrams

FUNCTIONAL ECOLOGY (2010)

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Article Ecology

Consequences of adaptive foraging in diverse communities

Nicolas Loeuille

FUNCTIONAL ECOLOGY (2010)

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Article Multidisciplinary Sciences

The Functional Response of a Generalist Predator

Sophie Smout et al.

PLOS ONE (2010)

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Review Ecology

Quantitative descriptions of resource choice in ecological models

Peter A. Abrams

POPULATION ECOLOGY (2010)

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Article Ecology

Functional responses modified by predator density

Pavel Kratina et al.

OECOLOGIA (2009)

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Article Ecology

Revisiting the classics: Considering nonconsumptive effects in textbook examples of predator-prey interactions

Barbara L. Peckarsky et al.

ECOLOGY (2008)

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Review Ecology

Relationships between direct predation and risk effects

Scott Creel et al.

TRENDS IN ECOLOGY & EVOLUTION (2008)

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Article Ecology

Species diversity modulates predation

Pavel Kratina et al.

ECOLOGY (2007)

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Article Ecology

The role of behavioral dynamics in determining the patch distributions of interacting species

Peter A. Abrams et al.

AMERICAN NATURALIST (2007)

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Article Ecology

Scared to death? The effects of intimidation and consumption in predator-prey interactions

EL Preisser et al.

ECOLOGY (2005)

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Article Biology

Consumer-food systems: why type I functional responses are exclusive to filter feeders

JM Jeschke et al.

BIOLOGICAL REVIEWS (2004)

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Article Ecology

Consequences of behavioral dynamics for the population dynamics of predator-prey systems with switching

PA Abrams et al.

POPULATION ECOLOGY (2004)

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Article Ecology

Coexistence of competitors in metacommunities due to spatial variation in resource growth rates;: does R* predict the outcome of competition?

PA Abrams et al.

ECOLOGY LETTERS (2004)

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Article Ecology

Population dynamical consequences of reduced predator switching at low total prey densities

PA Abrams et al.

POPULATION ECOLOGY (2003)

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Article Ecology

Dynamic versus instantaneous models of diet choice

BO Ma et al.

AMERICAN NATURALIST (2003)

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Article Ecology

The nature of predation: prey dependent, ratio dependent or neither?

PA Abrams et al.

TRENDS IN ECOLOGY & EVOLUTION (2000)

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