Nested liana-tree network in three distinct neotropical vegetation formations

Sfair, Júlia Caram; Rochelle, André Luis Casarin; Rezende, Andréia Alves; Melis, Juliano van; Weiser, Veridiana de Lara; Martins, Fernando Roberto

doi:10.1016/j.ppees.2010.09.001

Cited by 35 publications

(64 citation statements)

References 46 publications

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“…facilitation). Facilitative interactions have been recorded previously (Putz 1984;Pérez-Salicrup & de Meijere 2005), and community-level positive co-occurrence patterns have been found in other ecosystems (see Sfair et al 2010). However, this result does not support what was found using an individual-based approach to analyse the community-level matrix or host preferences previously found at this site (Burns & Dawson 2005).…”

Section: Discussionmentioning

confidence: 70%

Liana co-occurrence patterns in a temperate rainforest

Blick

Burns

2011

Journal of Vegetation Science

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Questions: Are liana–host interactions structured at the community level? Do liana–host interactions differ between species, growth form guilds or habitats? Location: Otari‐Wilton's Bush, on the southern tip of North Island, New Zealand. The forest contains 75 ha of mature and regenerating conifer–broadleaf forest. Methods: Nine liana species were quantified among 217 trees to test for negative co‐occurrence patterns. We also conducted additional analyses within and among compartments embedded in the community‐level matrix. Liana and host abundance distributions were assessed across two contrasting habitats. Results: Community‐level analyses revealed negative co‐occurrence patterns. Positive, neutral and negative co‐occurrence patterns were found among compartments within the community‐level matrix. Host species compartments were consistent with randomized expectations, while positive co‐occurrence patterns were found within the host species matrix. Negative co‐occurrence patterns were found inconsistently among lianas that share the same region of host space, and those that do not. Conclusions: Overall, results indicate the liana community is structured non‐randomly. Liana–host interactions appear to follow an opportunistic growth strategy and interactions are due mostly to habitat partitioning.

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Section: Discussionmentioning

confidence: 70%

Liana co-occurrence patterns in a temperate rainforest

Blick

Burns

2011

Journal of Vegetation Science

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“…This area has a short dry season from July to August and an average annual precipitation of 1306 mm (Weiser 2007). For detailed information about the studied area and the vegetation characterization, see Weiser (2007) and Sfair et al (2010). Coutinho 1978;Durigan & Ratter 2016;Strassburg et al 2017), few of them investigated lianas and their interaction with trees (but see Weiser 2007;Sfair et al 2010Sfair et al , 2016.…”

Section: Data Samplingmentioning

confidence: 99%

“…Liana and tree species do not interact randomly: regardless of their species composition and environmental features, the interactions between lianas and trees are structured in a nested pattern in tropical (Sfair et al 2010) and temperate (Calatayud et al 2017) forests. In nested networks of interactions, generalist species interact with each other in a dense core of interactions.…”

Section: Introductionmentioning

confidence: 99%

Species traits and abundance influence the organization of liana–tree antagonistic interaction

et al. 2017

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The interaction among species can be influenced by neutral processes, in which more abundant species have high effect on the structure of interaction, or can be influenced by trait matching. Despite both variables (abundance and species traits) influencing the interaction of species in mutualistic networks, few studies showed their importance in antagonistic networks. Here, we posed the question: what are the main predictors of the liana-tree interactions: species abundance, biological traits or both? In a savanna woodland fragment in south-eastern Brazil, we sampled lianas and trees in 1 ha, where we recorded the abundance, maximum height and bark roughness of tree species, as well as abundance, maximum diameter and climbing system of liana species. For each species, we calculated their contribution to nestedness (n i ), which is a measure of network structure, and performed simple linear regressions between n i and abundance and species traits. Abundant species contribute more to n i than rare species, indicating that neutral processes affect interactions between lianas and trees, probably because lianas are opportunistic and climb trees in their neighbourhood. The only trait related to n i was tree height, which can indicate that light availability can have a considerable role on network structure between both growth forms. Therefore, the importance of species abundance and tree height can be related to opportunism of lianas on climbing the most suitable tree in their neighbourhood.

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“…Burns (2007) reported nestedness in commensalism relationships between epiphytes and host trees, and he attributed the observed nested pattern to an epiphyte succession process in which earlier epiphytes facilitate the colonization of later recruiting species. On the other hand, a study by Blick and Burns (2009) showed no support for nestedness in mistletoe‐ and liana‐host species networks (Burns, 2007; Sfair et al . 2010).…”

mentioning

confidence: 99%

“…2006, Vacher et al . 2008), and likewise, little is known about networks of interacting plants (Burns 2007, Sfair et al . 2010).…”

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confidence: 99%

Mistletoes Play Different Roles in a Modular Host–Parasite Network

et al. 2011

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Antagonistic interactions between host plants and mistletoes often form complex networks of interacting species. Adequate characterization of network organization requires a combination of qualitative and quantitative data. Therefore, we assessed the distribution of interactions between mistletoes and hosts in the Brazilian Pantanal and characterized the network structure in relation to nestedness and modularity. Interactions were highly asymmetric, with mistletoes presenting low host specificity (i.e., weak dependence) and with hosts being highly susceptible to mistletoe-specific infections. We found a non-nested and modular pattern of interactions, wherein each mistletoe species interacted with a particular set of host species. Psittacanthus spp. infected more species and individuals and also caused a high number of infections per individual, whereas the other mistletoes showed a more specialized pattern of infection. For this reason, Psittacanthus spp. were regarded as module hubs while the other mistletoe species showed a peripheral role. We hypothesize that this pattern is primarily the result of different seed dispersal systems. Although all mistletoe species in our study are bird dispersed, the frugivorous assemblage of Psittacanthus spp. is composed of a larger suite of birds, whereas Phoradendron are mainly dispersed by Euphonia species. The larger assemblage of bird species dispersing Psittacanthus seeds may also increase the number of hosts colonized and, consequently, its dominance in the study area. Nevertheless, other restrictions on the interactions among species, such as the differential capacity of mistletoe infections, defense strategies of hosts and habitat types, can also generate or enhance the observed pattern.Abstract in Portuguese is available in the online version of this article.

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Nested liana-tree network in three distinct neotropical vegetation formations

Cited by 35 publications

References 46 publications

Liana co-occurrence patterns in a temperate rainforest

Liana co-occurrence patterns in a temperate rainforest

Species traits and abundance influence the organization of liana–tree antagonistic interaction

Mistletoes Play Different Roles in a Modular Host–Parasite Network

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