Non‐resource effects of foundation species on meta‐ecosystem stability and function

Jodoin, Julien Massé; Guichard, Frédéric

doi:10.1111/oik.06506

Cited by 8 publications

(2 citation statements)

References 76 publications

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“…Aspatial meta-ecosystem model of material cycling Jodoin and Guichard (2019) Ecosystem Engineering (population models) How does ecosystem engineering influence plant population dynamics?…”

Section: Consumptive Effectsmentioning

confidence: 99%

A theory for context‐dependent effects of mammalian trampling on ecosystem nitrogen cycling

Meyer,

Leroux

2024

Journal of Animal Ecology

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Large mammalian herbivores substantially impact ecosystem functioning. As their populations are dramatically altered globally, disentangling their consumptive and non‐consumptive effects is critical to advance mechanistic understanding and improve prediction of effects over ecosystem and Earth‐system spatial extents. Mathematical models have played an important role in clarifying potential mechanisms of herbivore zoogeochemistry, based mostly on their consumptive effects as primary consumers and recyclers of organic and inorganic matter via defecation and urination. Trampling is a ubiquitous effect among walking vertebrates, but the consequences and potential mechanisms of trampling in diverse environments remain poorly understood. We derive a novel mathematical model of large mammalian herbivore effects on ecosystem nitrogen cycling, focusing on how trampling and environmental context impact soil processes. We model herbivore trampling with a linear positive or negative additive effect on soil‐mediated nitrogen cycling processes. Combining analytical and numerical analyses, we find trampling by large mammalian herbivores is likely to decrease nitrogen mineralisation rate across diverse environments, such as temperate grassland and boreal forest. These effects are mediated by multiple potential mechanisms, including trampling‐induced changes to detritivore biomass and functioning (e.g. rate of organic matter consumption). We also uncover scenarios where trampling can increase nitrogen mineralisation rate, contingent on the environment‐specific relative sensitivity of detritivore mineral‐nitrogen release and detritivore mortality, to trampling. In contrast to some consumptive mechanisms, our results suggest the pace of soil nitrogen cycling prior to trampling has little influence over the direction of the trampling net effect on nitrogen mineralisation, but that net effects may be greater in slow‐cycling systems (e.g. boreal forests) than in fast‐cycling systems (e.g. grasslands). Our model clarifies the potential consequences of previously overlooked mechanisms of zoogeochemistry that are common to all terrestrial biomes. Our results provide empirically testable predictions to guide future progress in empirical and theoretical studies of herbivore effects in diverse environmental contexts. Resolving ecological contingencies around animal consumptive and non‐consumptive effects will improve whole‐ecosystem management efforts such as restoration and rewilding.

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“…Aspatial meta-ecosystem model of material cycling Jodoin and Guichard (2019) Ecosystem Engineering (population models) How does ecosystem engineering influence plant population dynamics?…”

Section: Consumptive Effectsmentioning

confidence: 99%

A theory for context‐dependent effects of mammalian trampling on ecosystem nitrogen cycling

Meyer,

Leroux

2024

Journal of Animal Ecology

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“…Such large‐scale transient dynamics can probably play out over long time periods before affecting remote components of the meta‐system, involving a coupling of local and regional dynamics operating at different temporal scales (Fig. 3), with a potential asynchrony in the range of local ecosystem responses (Massé Jodoin and Guichard 2019). For instance, the delayed decline in a given ecosystem function associated with large‐scale movement of matter can entail functioning changes with contrasting temporal dynamics in remote ecosystems.…”

Section: Functional Debts In Meta‐ecosystemsmentioning

confidence: 99%

Revisiting extinction debt through the lens of multitrophic networks and meta‐ecosystems

Blanchard

Munoz²

2022

Oikos

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The concept of extinction debt refers to the time‐delayed extinction of species following an environmental change. Precisely because of their delayed nature, extinction debts constitute a major challenge for both biodiversity research and conservation. Although it has received considerable attention and support from theoretical and empirical evidence during the last decades, the concept is still mainly apprehended through a species‐based view. However, our understanding of ecological systems is increasingly enhanced by approaches focusing on ecosystem functioning and species interaction networks. Notably, co‐extinctions triggered by the loss and disruption of species interactions has received growing interest. Yet, the wide spectrum of potential co‐extinctions is rarely considered through the lens of transient dynamics. A more ecosystem functioning‐focused perspective on delayed extinctions is thus needed. Here, we propose to fill this conceptual gap by revisiting the concept of extinction debt in the light of multitrophic networks and meta‐ecosystem theories. We emphasize the coupled nature of ecological dynamics across interaction networks within and between ecosystems, which the current view of extinction debts does not fully integrate. We address how the structure of interaction networks and the contrasting tempo of extinction in species, function and interaction can determine co‐extinction debts scenarios. Importantly the alteration of specific organisms and ecological processes can trigger ecosystem‐level feedbacks and lead to cascading delayed co‐extinction dynamics spreading across ecological networks. We argue that such transient dynamics are likely to incur both long‐term and remote consequences on biodiversity and ecosystem functioning. Then, we outline the challenges and opportunities for research and conservation emerging from this new perspective on extinction debts.

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Litter manipulation enhances plant community heterogeneity via distinct mechanisms: The role of distribution patterns of plant functional composition and niche breadth variability

Zhou

et al. 2022

Journal of Environmental Management

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Non‐resource effects of foundation species on meta‐ecosystem stability and function

Cited by 8 publications

References 76 publications

A theory for context‐dependent effects of mammalian trampling on ecosystem nitrogen cycling

A theory for context‐dependent effects of mammalian trampling on ecosystem nitrogen cycling

Revisiting extinction debt through the lens of multitrophic networks and meta‐ecosystems

Litter manipulation enhances plant community heterogeneity via distinct mechanisms: The role of distribution patterns of plant functional composition and niche breadth variability

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