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Interaction networks in a Brazilian cerrado: what changes when you add palynological information to floral visitor data?

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Abstract

Interaction networks between plants and their floral visitors are often studied with a plant-centered approach, and the results obtained with these data may generate incomplete conclusions on network topology. Thus, we propose to elucidate how biases associated with the approach to data collection can influence the topology of interaction networks by examining species richness, interactions, generalization levels, and nestedness in three interaction matrices: plant-centered, animal-centered, and their combination. The results of the combined data indicate an increase in connectance in relation to animal-centered networks and differences in the mean degree for plants and animals, showing the importance of complementary methods of collecting data to reduce the sampling biases of each isolated method. The nestedness level was most time significant and higher in the animal-centered networks. Our work shows that the apparently specialist behavior of some visitor species may be in part circumvented with the supplementation of plant-centered data with animal-centered data, thereby leading to a result closer to that expected by theory, which predicts a more generalist behavior.

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Acknowledgments

National Council for Scientific and Technological Development (CNPq) supported this work with a fellowship (Process nº 141893/2007-9 to M.R.V.) and with a Research Productivity Fellowship (Process nº 301220/2009-3 to C.P.L.). We thank Dr. F A Silveira (UFMG) and Dr. G Mello (UFPR) for the identification of floral visitors, Ms. L Borges (USP) for the identification of plant species, and CO Gridi-Papp for the English translation.

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Authors and Affiliations

  1. Instituto de Biociências, Departamento de Ecologia, Universidade de São Paulo, Rua do Matão-travessa 14, Butantã, 05508-090, São Paulo, SP, Brazil

    Maria Rodrigues Vianna & Astrid de Matos Peixoto Kleinert

  2. Centro de Pesquisa em Plantas Vasculares, Núcleo de Pesquisa em Palinologia, Instituto de Botânica, Av. Miguel Stéfano, 3687 Água Funda, 04045-972, São Paulo, SP, Brazil

    Cynthia Fernandes Pinto da Luz

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  1. Maria Rodrigues Vianna
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  2. Cynthia Fernandes Pinto da Luz
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Correspondence to Maria Rodrigues Vianna.

Additional information

Manuscript editor: Klaus Hartfelder

Réseaux d’interactions dans un Cerrado brésilien: qu’est-ce qui change quand vous ajoutez une information palynologique aux données concernant les espèces visitant les fleurs?

Réseaux de pollinisateurs / topologie / interaction plante-animal / données palynologiques / Cerrado

Interaktionsnetzwerke für Bestäuber im Cerrado-Biom Brasiliens: Was ändert sich, wenn Information zu Pollen in die Analysen einbezogen wird?

Bestäubernetzwerk / Topologie / Tier-Pflanzen-Interaktion / Palynologiedaten / Cerrado

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Vianna, M.R., da Luz, C.F.P. & de Matos Peixoto Kleinert, A. Interaction networks in a Brazilian cerrado: what changes when you add palynological information to floral visitor data?. Apidologie 45, 418–430 (2014). https://doi.org/10.1007/s13592-013-0256-z

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