Towards understanding factors influencing the benefit of diversity in predator communities for prey suppression

Laubmeier, Amanda N.; Rebarber, Richard; Tenhumberg, Brigitte

doi:10.1002/ecs2.3271

Cited by 5 publications

(5 citation statements)

References 47 publications

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“…This formulation of a representative system with our proposed multiple resource limitation framework skims over a number of important biological factors, such as the time it takes for resources to be recycled, spatial components, and trait-based variation effects, among others [69,70]. These effects can be incorporated by considering models with a time-delay and spatial structure [71,72], or even pseudo-spatial models that use patches to imitate the spatial structure in populations [73].…”

Section: Discussionmentioning

confidence: 99%

Rich Dynamics of a General Producer–Grazer Interaction Model under Shared Multiple Resource Limitations

2023

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Organism growth is often determined by multiple resources interdependently. However, growth models based on the Droop cell quota framework have historically been built using threshold formulations, which means they intrinsically involve single-resource limitations. In addition, it is a daunting task to study the global dynamics of these models mathematically, since they employ minimum functions that are non-smooth (not differentiable). To provide an approach to encompass interactions of multiple resources, we propose a multiple-resource limitation growth function based on the Droop cell quota concept and incorporate it into an existing producer–grazer model. The formulation of the producer’s growth rate is based on cell growth process time-tracking, while the grazer’s growth rate is constructed based on optimal limiting nutrient allocation in cell transcription and translation phases. We show that the proposed model captures a wide range of experimental observations, such as the paradox of enrichment, the paradox of energy enrichment, and the paradox of nutrient enrichment. Together, our proposed formulation and the existing threshold formulation provide bounds on the expected growth of an organism. Moreover, the proposed model is mathematically more tractable, since it does not use the minimum functions as in other stoichiometric models.

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Section: Discussionmentioning

confidence: 99%

Rich Dynamics of a General Producer–Grazer Interaction Model under Shared Multiple Resource Limitations

2023

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“…Evidence regarding the impact of biodiversity on crop yield and carbon storage is mixed, and higher biodiversity sometimes reduces the provision of certain ecosystem services [32,33]. In biocontrol, for instance, more diverse natural enemy communities can be less effective due to intraguild predation and behavioral interference [34,35]. More generally, the cascade-mediated relationship between biodiversity and economic value exhibits functional forms ranging from positive-convex to negative-concave [36], which has important implications for coupled human-natural systems.…”

Section: More Complexity Is Not Always Bettermentioning

confidence: 99%

Comment on ‘In complexity we trust: learning from the socialist calculation debate for ecosystem management’

Bingham,

Van Kleunen,

Kolisnyk

et al. 2023

Environ. Res. Lett.

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Using a metaphor based on a historical debate between socialist and free-market economists, Salliou and Stritih (Environ. Res. Lett. 18 151001) advocate for decentralizing environmental management to harness emergent complexity and promote ecosystem health. Concerningly, however, their account seems to leave little room for top-down processes like government-led sustainability programs or centrally-planned conservation initiatives, the cornerstone of the post-2020 biodiversity framework. While we appreciate their call for humbleness, we offer a few words in defense of planning. Drawing on evidence from ecology, economics, and systems theory, we argue that (1) more complexity is not always better; (2) even if it were, mimicking minimally-regulated markets is probably not the best way to get it; and (3) sophisticated decision support tools can support humble planning under uncertainty. We sketch a re-interpretation of the socialist calculation debate that highlights the role of synthesis and theoretical pluralism. Rather than abandoning big-picture thinking, scientists must continue the difficult work of strengthening connections between and across multiple social, ecological, and policy scales.

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“…By contrast, the effects of multiple predators on prey can be antagonistic owing to intraguild predation, competition or interference when the degree of overlap between predator's foraging areas or phenologies is too high (i.e. risk reduction) [16]. All such potential effects are called multiple predator effects (MPEs [17]).…”

Section: Introductionmentioning

confidence: 99%

The presence of multiple parasitoids decreases host survival under warming, but parasitoid performance also decreases

et al. 2022

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Current global changes are reshaping ecological communities and modifying environmental conditions. We need to recognize the combined impact of these biotic and abiotic factors on species interactions, community dynamics and ecosystem functioning. Specifically, the strength of predator–prey interactions often depends on the presence of other natural enemies: it weakens with competition and interference or strengthens with facilitation. Such effects of multiple predators on prey are likely to be affected by changes in the abiotic environment, altering top-down control, a key structuring force in natural and agricultural ecosystems. Here, we investigated how warming alters the effects of multiple predators on prey suppression using a dynamic model coupled with empirical laboratory experiments with Drosophila– parasitoid communities. While multiple parasitoids enhanced top-down control under warming, parasitoid performance generally declined when another parasitoid was present owing to competitive interactions. This could reduce top-down control over multiple generations. Our study highlights the importance of accounting for interactive effects between abiotic and biotic factors to better predict community dynamics in a rapidly changing world and thus better preserve ecosystem functioning and services such as biological control.

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Towards understanding factors influencing the benefit of diversity in predator communities for prey suppression

Cited by 5 publications

References 47 publications

Rich Dynamics of a General Producer–Grazer Interaction Model under Shared Multiple Resource Limitations

Rich Dynamics of a General Producer–Grazer Interaction Model under Shared Multiple Resource Limitations

Comment on ‘In complexity we trust: learning from the socialist calculation debate for ecosystem management’

The presence of multiple parasitoids decreases host survival under warming, but parasitoid performance also decreases

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