Extinction-induced community reorganization in bipartite networks

Sheykhali, Somaye; Fernández-Gracia, Juan; Traveset, Anna; Eguı́luz, Vı́ctor M.

doi:10.1007/s41109-019-0131-6

Cited by 3 publications

(4 citation statements)

References 32 publications

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“…To test the robustness of a network, a node can be removed or altered to affect the network structure (Barnes et al 2016). Generally, the removal of the most connected species, hubs, causes more secondary extinctions than a random species (Sheykhali et al 2019). However, when the system returns to the original state after a perturbation the network is considered resilient (Mandakovic et al 2018).…”

Section: Biomonitoringmentioning

confidence: 99%

Microbial co-occurrence networks as a biomonitoring tool for aquatic environments: a review

Codello

Hose

Chariton

2022

Mar. Freshwater Res.

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Aquatic microbial ecosystems are increasingly under threat from human activities, highlighting the need to for the development and application of biomonitoring tools that can identify anthropogenically induced stress across a wide range of environments. To date, microbial biomonitoring has generally focussed on community composition and univariate endpoints, which do not provide discrete information about how species both interact with each other and as a collective. To address this, co-occurrence networks are being increasingly used to complement traditional community metrics. Co-occurrence network analysis is a quantitative analytical tool that examines the interactions between nodes (e.g. taxa) and their strengths. This information can be integrated and visualised as a network, whose characteristics and topological structures can be quantified. To date, co-occurrence network analysis has rarely been applied to aquatic systems. Here we explore the potential of co-occurrence networks as a biomonitoring tool in aquatic environments, demonstrating its capacity to provide a more comprehensive view of how microbial, notably bacterial, communities may be altered by human activities. We examine the key attributes of networks and providence evidence of how these may change as a response to disturbances while also highlighting some of the challenges associated with making the approach routine.

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Section: Biomonitoringmentioning

confidence: 99%

Microbial co-occurrence networks as a biomonitoring tool for aquatic environments: a review

Codello

Hose

Chariton

2022

Mar. Freshwater Res.

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“… 2018 ; Sheykhali et al. 2019 ), or antagonistic such as in host-parasitoid (Cagnolo et al. 2010 ; Morris et al.…”

Section: Introductionmentioning

confidence: 99%

The persistence of bipartite ecological communities with Lotka–Volterra dynamics

Dopson,

Emary

2024

J. Math. Biol.

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The assembly and persistence of ecological communities can be understood as the result of the interaction and migration of species. Here we study a single community subject to migration from a species pool in which inter-specific interactions are organised according to a bipartite network. Considering the dynamics of species abundances to be governed by generalised Lotka–Volterra equations, we extend work on unipartite networks to we derive exact results for the phase diagram of this model. Focusing on antagonistic interactions, we describe factors that influence the persistence of the two guilds, locate transitions to multiple-attractor and unbounded phases, as well as identifying a region of parameter space in which consumers are essentially absent in the local community.

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“…In the mutualistic context, species should not be considered in isolation, as they participate in a complex of interactions (Bascompte & Jordano, 2014). Individuals depend upon each other for resources and processes, such as dispersal and reproduction, to the point that the loss of single species may drive not just co‐extinctions (Colwell et al, 2012) but also pervasive effects on the community stability (Campbell et al, 2012; Sheikhali et al, 2019), and even ecosystem functions derived from that loss (Rogers et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…The interacting actors forming a web‐like architecture can be explored by the network approach (Bascompte & Jordano, 2014). The description of plant–animal interactions through networks disentangles how species are organized within populations and communities, and inferences can be made about individual roles, heterogeneity in specificity degrees (Bascompte & Jordano, 2007; Dormann et al, 2017) and, ultimately, the consequences of the loss of functions (Sheikhali et al, 2019; Vieira & Almeida‐Neto, 2014).…”

Section: Introductionmentioning

confidence: 99%

Functional roles of frugivores and plants shape hyper‐diverse mutualistic interactions under two antagonistic conservation scenarios

et al. 2022

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Disentangling the structure of plant–animal mutualisms shed light on how species are organized, and allow us to infer about resilience, specificity, and ultimately the consequences of the loss of functions to the ecosystem. Here we gathered fruit–frugivore interactions for all the major vertebrate taxa interacting with plants in two conservation states in the Brazilian Atlantic forest: a small patch and a continuous forest. Using a network approach, we identified individual roles played by vertebrates and plants, as well as the most relevant functional traits determining the network structure. The most important vertebrates in the continuous forest were the frugivorous characterized by the ability to swallow fruits containing small to large seeds, but they also were the first to be vanished from the small patch decades ago. Animal gape/gullet size, but not body mass, together with the greatest degrees of frugivory contributed to structure the conserved community. In the forest patch, where specialization degrees (in terms of number of interactions performed) were lost, small generalist birds and the only still living primate, along with small lipid‐rich fruits, were central in maintaining community structure. This study brings insights on the potential of conserved forests to hold important species‐rich interactions, at the same time that small patches count on small birds and small fruits with increased energetic rewards to maintain structuring under human degradation threats. Our results reemphasize the importance of preserving large continuous forest remnants to support important mutualistic interactions subjected to functional traits already lost in small degraded patches. Abstract in Portuguese is available with online material.

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Extinction-induced community reorganization in bipartite networks

Cited by 3 publications

References 32 publications

Microbial co-occurrence networks as a biomonitoring tool for aquatic environments: a review

Microbial co-occurrence networks as a biomonitoring tool for aquatic environments: a review

The persistence of bipartite ecological communities with Lotka–Volterra dynamics

Functional roles of frugivores and plants shape hyper‐diverse mutualistic interactions under two antagonistic conservation scenarios

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