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Estrutura da rede de interação planta-polinizador no Pantanal e seus mecanismos determinantes
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Fundação Universidade Federal de Mato Grosso do Sul
Abstract
The use of the networks of interactions aids in the identification of patterns and organizing processes
of plant communities and pollinators. We studied the structure of the network of interactions between
plants and floral visitors over two years in a sub-region of the Pantanal Sul in order to understand
which are the interactors, how the interactions are structured and what the possible mechanisms
involved in this structuring. A total of 238 interactions were recorded among 55 plant species and 80
species of floral visitors. The network of plant-floral interactions showed incomplete and low
connectivity, was nested, modular and specialized, except in the dry season, when nesting was not
significant. The number of interacting species was significantly lower in the dry season, which
presented higher level of specialization (H2 '). Among the predictor variables analyzed, the number
of individuals was correlated with the degree, the strength of interactions and the diversity of partners.
The diversity of partners was related to the number of flowers. The specialization of the species (d ')
was not related to the floral attributes analyzed. The modules were not explained by phylogenetic
relationships or by floral attributes.
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