Functional traits shape small mammal-helminth network: patterns and processes in species interactions

Cardoso, Thiago dos Santos; Andreazzi, Cecilia S.; Maldonado, Arnaldo; Gentile, Rosana

doi:10.1017/s0031182021000640

Cited by 14 publications

(14 citation statements)

References 51 publications

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“…Contrary to the results of the present study, Dallas and Presley (2014) did not find a high contribution of host phylogeny to helminth diversity, despite having observed high parasite specificity. Likewise, Cardoso et al (2021) found no influence of host taxonomy on parasite sharing in a small mammal-helminth interaction network, raising new discussions about the effect of phylogenetic signals on host-parasite interactions.…”

Section: Discussionmentioning

confidence: 94%

“…However, host body mass and feeding habits are considered some of the main determinants of the variation in parasite species richness or abundance ( Cardoso et al, 2020 ; Dallas and Presley, 2014 ; Kamiya et al, 2014 ). Recently, Cardoso et al (2021) pointed out that small mammal hosts with a high abundance, frugivorous/omnivorous diet and terrestrial locomotor habits were more vulnerable to infection by helminth parasites in a natural environment. Dallas et al, 2019 , using a global database of parasite sharing between mammals, reported that the population density of the hosts was an important predictor of the host-parasite interaction.…”

Section: Discussionmentioning

confidence: 99%

“…The mechanistic approach investigates the contribution of different factors to the metacommunity structure by decomposing the variance of a given set of factors ( Dallas and Presley, 2014 ; Cardoso et al, 2020 ). Host attributes, for example (diet, body mass and abundance) are considered important predictors of host-parasite relationships ( Cardoso et al, 2019 , 2020 , 2021 ; Dallas and Presley, 2014 ; Dallas et al, 2019 ; Kamiya et al, 2014 ). The host's diet can contribute to the acquisition of parasites because many parasites that have indirect life-cycles can be acquired by the consumption of their intermediate hosts ( Leung and Koprivnikar, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

“…Hosts with higher body masses may have a greater number of potential niches for parasite colonization ( Kamiya et al, 2014 ; Dallas et al, 2019 ). Hosts that are more abundant may have greater exposure to parasites in the environment than less abundant hosts ( Cardoso et al, 2021 ; Dallas et al, 2020 ; Kamiya et al, 2014 ; Morand, 2015 ). In addition, the phylogeny of the host is related to the evolution of the host-parasite interaction ( Dallas and Presley, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

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Helminths of sigmodontine rodents in an agroforestry mosaic in the Brazilian Atlantic Forest: Patterns and processes of the metacommunity structure

Costa

Cardoso

Costa-Neto

et al. 2022

International Journal for Parasitology: Parasites and Wildlife

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Helminths of sigmodontine rodents in an agroforestry mosaic in the Brazilian Atlantic Forest: Patterns and processes of the metacommunity structure

Costa

Cardoso

Costa-Neto

et al. 2022

International Journal for Parasitology: Parasites and Wildlife

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“…Our findings indicated the influence of host species, as well as locality, on the morphometry of A. raillieti , thus suggesting phenotypic plasticity regarding host attributes and spatial variables [ 64 ].…”

Section: Discussionmentioning

confidence: 96%

Population genetic structure and phenotypic diversity of Aspidodera raillieti (Nematoda: Heterakoidea), a parasite of Didelphini marsupials in Brazil’s South and Southeast Atlantic Forest

et al. 2022

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Background The population genetics of parasites may be influenced by host specificity, life cycle, host geographical range, evolutionary history, and host population structure. The nematode Aspidodera raillieti infects different marsupial and rodent hosts in the Nearctic and Neotropical regions, implying a gene flow among populations. However, niche diversification of the main hosts of A. raillieti in superimposed areas may provide conditions for population genetic structuring within this parasite species. We examined the genetic structuring of A. raillieti infecting three marsupial species co-occurring along the South and Southeast Brazilian Atlantic Forest, a hotspot of biodiversity. Methods We employed morphometric analyses and partial mitochondrial cytochrome c oxidase I gene sequences (MT-CO1) to characterize populations via phylogenetic and phylogeographic analyses. Results Among 175 A. raillieti specimens recovered from the marsupial hosts Didelphis aurita, D. albiventris, and Philander quica, we identified 99 MT-CO1 haplotypes forming four haplogroups and four clades in networks and phylogenetic trees, respectively. Clades I and II encompassed parasites of D. albiventris from the South region, clade III comprised parasites of D. aurita from the South and Southeast regions, and clade IV encompassed parasites of D. aurita and D. albiventris from the South and Southeast regions and parasites of P. quica from the South region. High genetic differentiation between clades, with a high fixation index and greater genetic variation in the analysis of molecular variance (AMOVA), indicated low gene flow between clades. Haplotypes shared among host species revealed a lack of host specificity. A significant correlation in the Mantel test suggested parasite isolation by distance, while there was no evidence of geographical structure between populations. Negative neutrality test values for clades III and IV suggested recent population expansion. Morphometric differentiation between A. raillieti specimens recovered from different host species, as well as from different localities, was more evident in males. Conclusion The genetic structure of A. raillieti populations in the South and Southeast Atlantic Forest resulted from historical events rather than from current geographical distribution or host specificity. We also demonstrate morphometric variation associated with host species and localities, suggesting phenotypic plasticity to host attributes and to spatial variables. Graphical Abstract

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Sensitivity of bipartite network analyses to incomplete sampling and taxonomic uncertainty

Llopis‐Belenguer

Balbuena

Blasco‐Costa

et al. 2023

Ecology

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Bipartite network analysis is a powerful tool to study the processes structuring interactions in ecological communities. In applying the method, it is assumed that the sampled interactions provide an accurate representation of the actual community. However, acquiring a representative sample may be difficult as not all species are equally abundant or easily identifiable. Two potential sampling issues can compromise the conclusions of bipartite network analyses: failure to capture the full range of interactions (sampling completeness) and use of a taxonomic level higher than species to evaluate the network (taxonomic resolution). We asked how commonly used descriptors of bipartite antagonistic communities (modularity, nestedness, connectance, and specialization [H2′]) are affected by reduced host sampling completeness, parasite taxonomic resolution, and their crossed effect, as they are likely to co‐occur. We used a quantitative niche model to generate weighted bipartite networks that resembled natural host–parasite communities. The descriptors were more sensitive to uncertainty in parasite taxonomic resolution than to host sampling completeness. When only 10% of parasite taxonomic resolution was retained, modularity and specialization decreased by ~76% and ~12%, respectively, and nestedness and connectance increased by ~114% and ~345% respectively. The loss of taxonomic resolution led to a wide range of possible communities, which made it difficult to predict its effects on a given network. With regards to host sampling completeness, standardized nestedness, connectance, and specialization were robust, whereas modularity was sensitive (~30% decrease). The combination of both sampling issues had an additive effect on modularity. In communities with low effort for both sampling issues (50%–10% of sampling completeness and taxonomic resolution), estimators of modularity, and nestedness could not be distinguished from those of random assemblages. Thus, the categorical description of communities with low sampling effort (e.g., if a community is modular or not) should be done with caution. We recommend evaluating both sampling completeness and taxonomic certainty when conducting bipartite network analyses. Care should also be exercised when using nonrobust descriptors (the four descriptors for parasite taxonomic resolution; modularity for host sampling completeness) when sampling issues are likely to affect a dataset.

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Functional traits shape small mammal-helminth network: patterns and processes in species interactions

Cited by 14 publications

References 51 publications

Helminths of sigmodontine rodents in an agroforestry mosaic in the Brazilian Atlantic Forest: Patterns and processes of the metacommunity structure

Helminths of sigmodontine rodents in an agroforestry mosaic in the Brazilian Atlantic Forest: Patterns and processes of the metacommunity structure

Population genetic structure and phenotypic diversity of Aspidodera raillieti (Nematoda: Heterakoidea), a parasite of Didelphini marsupials in Brazil’s South and Southeast Atlantic Forest

Sensitivity of bipartite network analyses to incomplete sampling and taxonomic uncertainty

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