Connectance and nestedness as stabilizing factors in response to pulse disturbances in adaptive antagonistic networks

Baumgartner, Matheus Tenório

doi:10.1016/j.jtbi.2019.110073

Cited by 25 publications

(22 citation statements)

References 44 publications

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“…The two properties, connectance and nestedness, are correlated 60 , 61 and their high values are providing to communities robustness and stability to disturbances through several mechanisms. For instance, high values for connectance and nestedness indicate that the predator have access to more scattered species, allowing it to compensate for eventual changes in the abundance of resources 62 . The lower value of the nestedness in the Pomo Pit than in shallow areas outside is coherent with a more specialized feeding of European hake within Pomo pit which is consistent with a less disturbed environment.…”

Section: Discussionmentioning

confidence: 99%

DNA metabarcoding suggests dietary niche partitioning in the Adriatic European hake

Riccioni

Stagioni

Manfredi

et al. 2022

Sci Rep

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The Northern Adriatic Sea (FAO Geographical Sub-Area 17) is one of the most productive fishing areas of the Mediterranean Sea and it includes a broad diversity of habitats. In the Northern Adriatic basin, the Pomo Pit (200–273 m of depth) is one of the most important areas of aggregation for some demersal stocks shared in the Adriatic Sea and it is an important spawning/nursery area of the European hake (Merluccius merluccius). Through a metabarcoding approach we investigated the feeding habits of European hake, both inside and outside the Pomo Pit, and their temporal variability comparing samples collected in 2016 and 2014. Our analyses proved the presence of an ontogenetic shift from a diet based mainly on crustaceans in juveniles to a more piscivorous feeding behaviour in adult hakes and suggested the presence of a specific niche partitioning and food preferences between hakes living inside and outside the Pomo Pit. The main differences among adult hakes refer to the presence of molluscs in the stomachs of hakes collected within the Pomo Pit and the presence of high depth prey species (i.e., Micromesistius poutassou). Metabarcoding revealed the relevant ecological role played by the Pomo Pit in M. merluccius feeding behaviour and ontogenetic development, promoting a careful ecosystem-based management of fisheries in this area through focused conservation measures.

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Section: Discussionmentioning

confidence: 99%

DNA metabarcoding suggests dietary niche partitioning in the Adriatic European hake

Riccioni

Stagioni

Manfredi

et al. 2022

Sci Rep

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“…on May 23, 2021 http://advances.sciencemag.org/ Downloaded from could help to clarify the impact of land use on the structure of trophic interaction networks. Modularity and nestedness in combination are used to describe network structure (21,30) and to understand how network structure and stability are linked in different systems (25,(30)(31)(32)(33)(34)(35). A particularly important component of stability is the robustness of interaction networks to species extinctions (36).…”

Section: Modularitymentioning

confidence: 99%

Changes in plant-herbivore network structure and robustness along land-use intensity gradients in grasslands and forests

et al. 2021

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Land-use intensification poses major threats to biodiversity, such as to insect herbivore communities. The stability of these communities depends on interactions linking herbivores and host plants. How interaction network structure begets robustness, and thus stability, in different ecosystems and how network structure and robustness are altered along land-use intensity gradients are unclear. We analyzed plant-herbivore networks based on literature-derived interactions and long-term sampling from 289 grasslands and forests in three regions of Germany. Network size and nestedness were the most important determinants of network robustness in both ecosystems. Along land-use intensity gradients, networks in moderately grazed grasslands were more robust than in those managed by frequent mowing or fertilization. In forests, changes of network robustness along land-use intensity gradients relied on changes in plant species richness. Our results expand our knowledge of the stability of plant-herbivore networks and indicate options for management aimed at stabilizing herbivore communities.

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“…That is, the mutualistic interaction between two species could have opposing effects on their ranges, potentially presenting additional feedback effects on each other. This could result in a stabilizing effect for species' range limits, as nested structures have been theoretically shown to promote community robustness to environmental perturbations (Baumgartner 2020); it could also lead to competitive interactions among specialist species that interact with the same generalist, potentially constraining the distributions of these specialist species (Cai et al 2020). Furthermore, the asymmetric nature of the influence that positive interactions have on the distribution of both interacting partners could shed some light on the mechanisms underlying range expansion rates and biological invasion (Cagua et al 2019).…”

Section: Effects Of Network Structure On Species' Range Limitsmentioning

confidence: 99%

Positive species interactions shape species' range limits

Stephan

Mora

Alexander

2021

Oikos

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The relationship between niche and distribution, and especially the role of biotic interactions in shaping species' geographic distributions, has gained increasing interest in the last two decades. Most ecological research has focused on negative species interactions, especially competition, predation and parasitism. Yet the relevance of positive interactions – mutualisms and commensalisms – have been brought to the fore in recent years by an increasing number of empirical studies exploring their impact on range limits. Based on a review of 73 studies from a Web of Science search, we found strong evidence that positive interactions can influence the extent of species' geographic or ecological ranges through a diversity of mechanisms. More specifically, we found that while obligate interactions, and especially obligate mutualisms, tend to constrain the ranges of one or both partners, facultative positive interactions tend to widen ranges. Nonetheless, there was more variation in effects of facultative interactions on range limits, pointing to important context‐dependencies. Therefore, we propose that conceptual development in this field will come from studying ecological interactions in the context of networks of many species across environmental gradients, since pairwise interactions alone might overlook the indirect and environmentally‐contingent effects that species have on each other in communities of many interacting species. Finally, our study also revealed key data gaps that limit our current understanding of the pervasiveness of effects that positive interactions have on species' ranges, highlighting potential avenues for future theoretical and experimental work.

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Connectance and nestedness as stabilizing factors in response to pulse disturbances in adaptive antagonistic networks

Cited by 25 publications

References 44 publications

DNA metabarcoding suggests dietary niche partitioning in the Adriatic European hake

DNA metabarcoding suggests dietary niche partitioning in the Adriatic European hake

Changes in plant-herbivore network structure and robustness along land-use intensity gradients in grasslands and forests

Positive species interactions shape species' range limits

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