Reconstruction of plant–pollinator networks from observational data

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Июнь 23, 2021

Abstract Empirical measurements of ecological networks such as food webs and mutualistic are often rich in structure but also noisy error-prone, particularly for rare species which observations sparse. Focusing on the case plant–pollinator networks, we here describe a Bayesian statistical technique that allows us to make accurate estimates network metrics from observational data. Our method yields not only these quantities, their errors, paving way principled analyses variables outcomes. We demonstrate use with an application previously published data Seychelles archipelago Kosciusko National Park, calculating structure, nestedness, other characteristics.

Язык: Английский

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Alteration of coastal productivity and artisanal fisheries interact to affect a marine food web

Scientific Reports, Год журнала: 2021, Номер 11(1)

Опубликована: Янв. 19, 2021

Abstract Top-down and bottom-up forces determine ecosystem function dynamics. Fisheries as a top-down force can shorten destabilize food webs, while effects driven by climate change alter the of primary productivity. We assessed response highly-resolved intertidal web to these two global drivers, using network analysis bioenergetic modelling. quantified relative importance artisanal fisheries another predator species, evaluated independent combined changes in plankton productivity on The was robust loss all harvested species but sensitive decline Interestingly, dampened negative impacts decreasing non-harvested reducing predation pressure consumers resources, interspecific competition between basal species. In contrast, increased sensitivity fishing total web. Our results show that strategies for new scenarios caused are needed protect marine ecosystems wellbeing local communities dependent their resources.

Язык: Английский

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Ecological theory of mutualism: Robust patterns of stability and thresholds in two‐species population models

Ecology and Evolution, Год журнала: 2021, Номер 11(24), С. 17651 - 17671

Опубликована: Дек. 1, 2021

Mutualisms are ubiquitous in nature, provide important ecosystem services, and involve many species of interest for conservation. Theoretical progress on the population dynamics mutualistic interactions, however, comparatively lagged behind that trophic competitive leading to impression ecologists still lack a generalized framework investigate mutualisms. Yet, over last 90 years, abundant theoretical work has accumulated, ranging from abstract detailed. Here, we review synthesize historical models two-species We find mutualisms qualitatively robust across derivations, including levels detail, types benefit, inspiring systems. Specifically, tend exhibit stable coexistence at high density destabilizing thresholds low density. These emerge when benefits mutualism saturate, whether due intrinsic or extrinsic dependence intraspecific processes, interspecific both. distinguish between resulting Allee effects, partner density, their mathematical conceptual causes. Our synthesis suggests there exists dynamic theory can make general predictions.

Язык: Английский

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Extinction of biotic interactions due to habitat loss could accelerate the current biodiversity crisis

Ecological Applications, Год журнала: 2022, Номер 32(6)

Опубликована: Апрель 2, 2022

Habitat loss disrupts species interactions through local extinctions, potentially orphaning that depend on interacting partners, via mutualisms or commensalisms, and increasing secondary extinction risk. Orphaned may become functionally secondarily extinct, the severity of current biodiversity crisis. While habitat destruction is a major cause loss, number extinctions largely unknown. We investigate relationship between orphaned species, bipartite network properties. Using real seed dispersal network, we simulate to estimate rate at which are orphaned. To be able draw general conclusions, also in synthetic networks quantify how changes properties affect orphan rates across broader parameter space. Both simulations show even small amounts can up 10% More area less connected networks, greater disparity richness network's trophic levels generally result more species. As lost land-use conversion climate change, increase community-level ecosystem functions. However, potential repercussions ranges from minimal (no orphaned) catastrophic (up 60% within orphaned). Severity depends much interaction intactness community affects degree redundancy networks. could add substantially function worldwide.

Язык: Английский

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Hidden layers of density dependence in consumer feeding rates

Ecology Letters, Год журнала: 2021, Номер 24(3), С. 520 - 532

Опубликована: Янв. 6, 2021

Abstract Functional responses relate a consumer's feeding rates to variation in its abiotic and biotic environment, providing insight into consumer behaviour fitness, underpinning population food‐web dynamics. Despite their broad relevance long‐standing history, we show here that the types of density dependence found classic resource‐ consumer‐dependent functional‐response models equate strong often untenable assumptions about independence processes underlying rates. We first demonstrate mathematically how quantify non‐independence between interference on multiple resources. then analyse two large collections data sets is pervasive borne out previously hidden forms dependence. Our results provide new lens through which view disentangle biological underpinnings species interactions multi‐species contexts.

Язык: Английский

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