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Importance of interaction frequency in analysis of ant-plant networks in tropical environments

Published online by Cambridge University Press:  13 December 2013

Wesley Dáttilo ,
Ingrid Sánchez-Galván ,
Denise Lange ,
Kleber Del-Claro  and
Víctor Rico-Gray
Wesley Dáttilo*
Affiliation:
Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, 91190, Mexico
Ingrid Sánchez-Galván
Affiliation:
CIBIO, Universidad de Alicante, San Vicente del Raspeig (Alicante), 03080, Spain
Denise Lange
Affiliation:
Laboratório de Ecologia Comportamental e Interações, Instituto de Biologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, 38400–058, Brazil
Kleber Del-Claro
Affiliation:
Laboratório de Ecologia Comportamental e Interações, Instituto de Biologia, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, 38400–058, Brazil
Víctor Rico-Gray
Affiliation:
Instituto de Neuroetología, Universidad Veracruzana, Xalapa, Veracruz, 91190, Mexico
*
1Corresponding author. Email: [email protected]
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Abstract:

Several studies have shown that qualitative (binary) ant-plant networks are highly nested in tropical environments, in which specialist species (with fewer interactions) are connected with generalists (with the most interactions) in cohesive subgroups. Interactions occur in both qualitative and quantitative networks, however, how their frequency may structure the nestedness in ecological networks involving these organisms is, we believe, unknown. Based on this perspective, we used nestedness analysis to address the effect of interaction frequency on ant-plant networks (n = 14 networks). Unlike binary networks, quantitative networks are often significantly non-nested. In addition, species with a higher interaction frequency have a higher number of links, indicating that these species are possibly more abundant and/or competitive. Moreover, different biological parameters can change the nature of ant-plant interactions, as a plant can be a good resource for one ant and a ‘bad’ resource for another. Thus, this suggests a new perspective for the study of interaction networks in the tropics, since species with lower interaction frequency are not necessarily subsets of species with higher frequency, and consequently generate the non-nested pattern in quantitative networks.

Keywords

Ant-plant interactionsecological networksnestednessqualitative networksquantitative networks
Type
Short Communication
Information
Journal of Tropical Ecology , Volume 30 , Issue 2 , March 2014 , pp. 165 - 168
Copyright
Copyright © Cambridge University Press 2013 

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