Flexible foraging behaviour increases predator vulnerability to climate change

Nature Climate Change, Journal Year: 2024, Volume and Issue: 14(4), P. 387 - 392

Published: Feb. 27, 2024

Higher temperatures are expected to reduce species coexistence by increasing energetic demands. However, flexible foraging behaviour could balance this effect allowing predators target specific prey maximize their energy intake, according principles of optimal theory. Here we test these assumptions using a large dataset comprising 2,487 stomach contents from six fish with different feeding strategies, sampled across environments varying availability over 12 years in Kiel Bay (Baltic Sea). Our results show that shifts trait- density-dependent selectivity warmer and more productive environments. This behavioural change leads lower consumption efficiency at higher temperature as select abundant but less energetically rewarding prey, thereby undermining persistence biodiversity. By integrating into dynamic food web models, our study reveals biodiversity communities under global warming.

Language: Английский

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Non‐native species have higher consumption rates than their native counterparts

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 14, 2025

ABSTRACT Non‐native species can be major drivers of ecosystem alteration, especially through changes in trophic interactions. Successful non‐native have been predicted to greater resource use efficiency relative trophically analogous native (the Resource Consumption Hypothesis), but rigorous evidence remains equivocal. Here, we tested this proposition quantitatively a global meta‐analysis comparative functional response studies. We calculated the log ratio paired and responses, using attack rate maximum consumption parameters as variables. Explanatory variables were consumer taxonomic group feeding group, habitat, assemblage latitude, distinctiveness. Maximum rates for 70% higher, on average, than those their counterparts; also tended not significantly so. The magnitude effect sizes varied with being highest favour non‐natives molluscs herbivores. differences between freshwater taxa, perhaps reflecting sensitivity insular food webs novel consumers; pattern needs explored further additional data are obtained from terrestrial marine ecosystems. In general, our results support Hypothesis, which partly explain how successful reduce populations restructure webs.

Language: Английский

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Habitat complexity reduces feeding strength of freshwater predators

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Abstract The physical structure of an environment potentially influences feeding interactions among organisms by providing refuges for prey. We examined how habitat complexity affects the functional response ambush predator (damselfly larvae Ischnura elegans ) and a pursuit (backswimmer Notonecta glauca on isopod Asellus aquaticus . run experiments in aquatic microcosms with increasing number structural elements (0, 2, or 3 rings plastic plants different spatial configurations), resulting five levels. Across these levels, predators were presented prey densities to determine their response. experimental design statistical analysis allowed us test effects presence, amount, level one pass, without confounding predictors. both across all levels was best described Type II model drove strength. Regarding latter, showed responses treatments. overall rate I. mainly driven absence vs. presence structure. Yet, case N. strongly dependent showing unique maximum rates (i.e. inverse handling time) each decreasing attack amount habitat. Overall, consumption less than half when complex structures present, compared no environment. Our findings demonstrate that dampens therefore plays key role stability freshwater ecosystems.

Language: Английский

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The rise of the Functional Response in invasion science: a systematic review

NeoBiota, Journal Year: 2023, Volume and Issue: 85, P. 43 - 79

Published: June 9, 2023

Predicting which non-native species will negatively impact biodiversity is a longstanding research priority. The Functional Response (FR; resource use in relation to availability) classical ecological concept that has been increasingly applied quantify, assess and compare impacts of species. Despite this recent growth, an overview applications knowledge gaps across relevant contexts currently lacking. We conducted systematic review using combination terms regarding FR invasion science synthesise scientific studies apply the approach field suggest new areas where it could have valuable applications. Trends publications about general were compared through Activity Index. Data extracted from papers reveal temporal, bibliographic, geographic trends, patterns study attributes such as type interaction habitat investigated, taxonomic groups used, context-dependencies assessed. In total, 120 included review. identified substantial unevenness reporting FRs science, despite rapidly growing number studies. To date, geographically skewed towards North America Europe, well predator-prey interactions freshwater habitats. Most focused on few invertebrates fishes. Species origin, life stage, environmental temperature complexity most frequently considered context-dependencies. conclude while thus far narrowly applied, broad potential application can be used test major hypotheses field.

Language: Английский

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Quantitative principles of microbial metabolism shared across scales

Nature Microbiology, Journal Year: 2024, Volume and Issue: 9(8), P. 1940 - 1953

Published: Aug. 6, 2024

Language: Английский

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In defense of the Type I functional response: The frequency and population-dynamic effects of feeding on multiple prey at a time

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: May 17, 2024

Abstract Ecologists differ in the degree to which they consider linear Type I functional response be an unrealistic versus sufficient representation of predator feeding rates. Empiricists tend it unsuitably non-mechanistic and theoreticians necessarily simple. Holling’s original rectilinear model is dismissed by satisfying neither desire, with most compromising on smoothly saturating II for searching handling are assumed mutually exclusive activities. We derive a “multiple-prey-at-a-time” generalization that includes III reflect predators can continue search when arbitrary number already-captured prey. The multi-prey clarifies empirical relevance models conditions under linearity mechanistically-reasoned description rates, even times long. find support presence 35% 2,591 compiled datasets, evidence larger predator-prey body-mass ratios permit while greater numbers Incorporating into Rosenzweig-MacArthur population-dynamics reveals non-exclusivity lead coexistence states dynamics not anticipated theory built traditional models. In particular, bistable fixed-point limit-cycle long-term crawl-by transients between them where abundance top-heavy food webs linear. conclude should considered empirically but also more bounded conclusions drawn presuming appropriate.

Language: Английский

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EcologicalNetworksDynamics.jl: A Julia package to simulate the temporal dynamics of complex ecological networks

Methods in Ecology and Evolution, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 30, 2025

Abstract Species interactions play a crucial role in shaping biodiversity, species coexistence, population dynamics, community stability and ecosystem functioning. Our understanding of the diversity driving these species, features is limited because current approaches often focus only on trophic interactions. This why new modelling framework that includes greater between crucially needed. We developed modular, user‐friendly, extensible Julia package delivers core functionality bio‐energetic food web model. Moreover, it embeds several ecological interaction types alongside capacity to manipulate external drivers dynamics. These represent important processes known influence functioning natural communities. Specifically, they include: (a) an explicit multiple nutrient intake model for producers, (b) competition among (c) temperature dependence implemented via Boltzmann‐Arhennius rule, (d) ability non‐trophic including space, plant facilitation, predator interference refuge provisioning. The inclusion various provides users with ask questions about simultaneous stressor impacts, thus develop theory relevant real world scenarios facing complex communities Anthropocene. It will allow researchers quantify relative importance different mechanisms was build theoreticians seeking explore effects dynamics communities, but also empiricists confront their empirical findings theoretical expectations. straightforward explicitly or provide tools generate those from few parameters.

Language: Английский

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Biological Control Potential of the Reduviid Predator Rhynocoris fuscipes (Fabricius) in Managing Noctuid Pests: Insights Into Predation and Prey Preference

Insects, Journal Year: 2025, Volume and Issue: 16(2), P. 224 - 224

Published: Feb. 18, 2025

Understanding predator-prey and predator-predator interactions is essential for evaluating the effectiveness of biocontrol agents developing efficient pest management strategies. This study investigates effects prey species, predator life stage, density on predatory efficiency generalist Rhynocoris fuscipes (Fabricius) under semi-field conditions. Both nymphs adults R. consumed significantly more second-instar larvae S. frugiperda than litura or M. separata. Notably, fifth-instar exhibited higher predation capacity (11.75 ± 0.37 10.90 0.40 larvae) fourth-instar (9.05 0.29 frugiperda. demonstrated a Type II functional response at all developmental stages toward each revealed attack rates (a = 1.5205 0.0544) frugiperda; additionally, handling time did not differ among three species. It suggests that this may be effective controlling noctuid populations low densities. As age increased, intraspecific competition also intensified. In multi-prey system, showed marked preference over other two These findings indicate are particularly in suppressing early-instar pests, especially frugiperda, enhances our understanding towards pests provides foundation development targeted strategies using predator.

Language: Английский

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Effect of temperature on functional response of Blattisocius mali (Acari: Blattisociidae) preying on the acarid mite Tyrophagus putrescentiae

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: May 2, 2025

Abstract Climate warming significantly impacts soil temperature and moisture , leading to changes in the activity of mites foraging behaviour edaphic predatory mites. The current research aimed investigate effect on functional response mite Blattisocius mali Oudemans preying either eggs or males mould Tyrophagus putrescentiae Schrank. To analyze type generalized equation Real was used while parameters were determined using Roger Hassell Cabello et al. models. Female adult B. displayed Type III II responses when respectively across all tested temperatures ranging between 10 °C 35 . handling time shorter at higher 25 °C, 30 males. In contrast potential for prey mortality attack rate ratio indicating efficiency temperatures. strongly impacted predators’ as accelerated predator action under increased consumption. However did not change with warmer but varied changing stages from egg male.

Language: Английский

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Allee-induced periodicity and bifurcations in a Gause-type model with interference phenomena

The European Physical Journal B, Journal Year: 2025, Volume and Issue: 98(4)

Published: April 1, 2025

Language: Английский

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