A Network Perspective for Community Assembly

Ponisio, Lauren C.; Valdovinos, Fernanda S.; Allhoff, Korinna T.; Gaiarsa, Marília Palumbo; Barner, Allison K.; Guimarães, Paulo R.; Hembry, David H.; Morrison, Beth M. L.; Gillespie, Rosemary G.

doi:10.3389/fevo.2019.00103

Cited by 76 publications

(86 citation statements)

References 136 publications

(179 reference statements)

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“…Thébault and Fontaine () have shown that highly connected and nested community architecture promotes stability and resilience in mutualistic interaction networks. Furthermore, the modularity observed in the gut interaction network is a testimony of the stable nature of the gut environment, also associated with mature bacterial communities mostly composed of specialists rather than generalists (Ponisio et al, ).…”

Section: Discussionmentioning

confidence: 99%

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

et al. 2019

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The world's richest freshwater fish community thrives in gradients of contrasting environments in Amazonia, ranging from ion‐poor acidic black waters, to ion‐rich circumneutral white waters. These hydrochemical gradients structure Amazonian fish assemblages via ecological speciation events. Fish bacterial communities contain an important genetic heritage essential for their hosts' survival and are also involved in adaptive divergence via niche adaptation processes, but the extent to which they evolve in response to hydrochemical gradients in Amazonia is unknown. Here we investigated bacterial communities (gut and skin mucus) of two ecologically and phylogenetically divergent host species (Mesonauta festivus and Serrasalmus rhombeus) distributed throughout these hydrochemical gradients. The goal was to characterize intra‐ and interspecific Amazonian fish microbiome variations across multiple scales. Using a 16S metabarcoding approach, we investigated the microbiota of 43 wild M. festivus, 32 S. rhombeus and seven water samples, collected at seven sampling sites encompassing both water colours. Taxonomical structures of bacterial communities from both host species were significantly correlated to the environmental continua of magnesium, sodium, dissolved organic carbon, calcium, dissolved O2, pH, potassium, hardness and chloride. Analysis of discriminating features in community structures across multiple scales demonstrated intra‐ and interspecific structural parallelisms in the response to the hydrochemical gradients. Together, these parallelisms suggest the action of selection on bacterial community structures along Amazonian hydrochemical gradients. Functional approaches along with reciprocal transplant experiments will provide further insights on the potential contribution of Amazonian fish microbiomes in host adaptation and ecological speciation events.

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Section: Discussionmentioning

confidence: 99%

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

et al. 2019

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“…Change points analyses were conducted in Python 2.7.10 and R 3.3.2 (R Core Team, 2015). The fully reproducible code and explanations for all analyses is available on GitHub at https:// github.com/lponisio/hedgerow_assembly (Ponisio & Gariarsa 2017).…”

Section: Identifying Change Pointsmentioning

confidence: 99%

Opportunistic attachment assembles plant–pollinator networks

2017

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Species and interactions are being lost at alarming rates and it is imperative to understand how communities assemble if we have to prevent their collapse and restore lost interactions. Using an 8-year dataset comprising nearly 20 000 pollinator visitation records, we explore the assembly of plant-pollinator communities at native plant restoration sites in an agricultural landscape. We find that species occupy highly dynamic network positions through time, causing the assembly process to be punctuated by major network reorganisations. The most persistent pollinator species are also the most variable in their network positions, contrary to what preferential attachment - the most widely studied theory of ecological network assembly - predicts. Instead, we suggest assembly occurs via an opportunistic attachment process. Our results contribute to our understanding of how communities assembly and how species interactions change through time while helping to inform efforts to reassemble robust communities.

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“…In addition to the local environment filtering the regional species pool into an assemblage of species capable of persisting in that environment, biotic interactions play an important role in subsequent community assembly (Boulangeat et al 2012;HilleResLambers et al 2012;Kraft et al 2014). Resident species at a local scale therefore reflect the combination of organisms that are selected for the local environment and for local species interactions (HilleResLambers et al 2012;Ponisio et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Eco-evolutionary feedbacks and the maintenance of metacommunity diversity in a changing environment

Fielding

Pantel

2020

Preprint

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The presence and strength of resource competition can influence how organisms 14 adaptively respond to environmental change. Selection may thus reflect a balance between two 15 forces, adaptation to an environmental optimum and evolution to avoid strong competition. While 16 this has been explored in single communities, its implications for eco-evolutionary dynamics at 17 the metacommunity scale are unknown. We developed a simulation model of quantitative trait 18 evolution for a trait that influences an organism's carrying capacity and its intra-and interspecific 19 competition strength. Multiple species inhabited a variable three-patch landscape, and we varied 20the connectivity level of the species among patches, the presence and pace of directional 21 environmental change, and the strength of competition between the species. Our results reflected 22 some patterns previously observed in evolving metacommunity models (e.g. species sorting and 23 community monopolization), although species sorting was more common when competition 24 strength was high and monopolization was observed only when the environmental change was 25 very rapid. We also detected an eco-evolutionary feedback loop between local phenotypic 26 evolution at one site and competition at another site that maintains species diversity in some 27conditions. The existence of a feedback loop that is maintained by dispersal indicates that eco -28 evolutionary dynamics in communities operate at a landscape scale. 29 30(1) ( ) = * −( − )2 2 2 151 152 Here xopt is the trait value corresponding to the maximum carrying capacity, Kmax, and Kmax is the 153 same for all populations in the patch. Carrying capacity decreases if population traits are distant 154

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A Network Perspective for Community Assembly

Cited by 76 publications

References 136 publications

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

Opportunistic attachment assembles plant–pollinator networks

Eco-evolutionary feedbacks and the maintenance of metacommunity diversity in a changing environment

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