Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/8998
Title: Extrafloral-nectaries and interspecific aggressiveness regulate day/night turnover of ant species foraging for nectar on Bionia coriacea.
Authors: Silva, Diego Vinícius Anjos
Caserio, Barbara Machado
Rezende, Felipe Teles
Ribeiro, Sérvio Pontes
Claro, Kleber Del
Fagundes, Roberth
Keywords: Brazil
Cerrado
Niche partition
Resource competition
Issue Date: 2016
Citation: SILVA, D. V. A. et al. Extrafloral-nectaries and interspecific aggressiveness regulate day/night turnover of ant species foraging for nectar on Bionia coriacea. Austral Ecology, v. 42, p. 317–328, 2016. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1111/aec.12446/full>. Acesso em: 25 ago. 2017.
Abstract: Plants bearing extrafloral nectaries (EFNs) vary the secretion of nectar between day and night, which creates turnover in the composition of interacting ant species. Daily variation in the composition of ant species foraging on vegetation is commonly observed, but its mechanisms are poorly understood. We evaluated the daily variation in nectar availability and interspecific aggressiveness between ants as possible regulatory mechanisms of the turnover in ant–plant interactions. We hypothesized that (i) plants would interact with more ant species during periods of higher secretion of nectar and that (ii) aggressive ant species would compete for nectar, creating a daily turnover of species collecting nectar. We tested this hypothesis by measuring the production of nectar during the day and night and by experimentally removing EFNs of Bionia coriacea (=Camptosema coriaceum) (Nees & Mart.) Benth. (Fabaceae: Faboideae) plants in a Brazilian savanna (Cerrado). We then compared the abundance and composition of ant species between those treatments and during the day. Our results indicate that more ant workers forage on plants during the day, when nectar was sugary, while more ant species forage at night, when aggressiveness between ant species was lower. We also detected a day/night turnover in ant species composition. Ant species foraging for nectar during the day were not the same at night, and this turnover did not occur on plants without EFNs. Both dominant ant species, diurnal Camponotus crassus (Hymenoptera: Formicidae) and nocturnal Camponotus rufipes (Hymenoptera: Formicidae), were the most aggressive species, attacking other ants in their specific periods of forage while also being very aggressive toward each other. However, this aggressiveness did not occur in the absence of nectar, which allowed non-aggressive nocturnal ant species to forage only during the daytime, disrupting the turnover. We conclude that extrafloral-nectar presence and interspecific aggressiveness between ants, along with other environmental factors, are important mechanisms creating turnovers in ants foraging on plants.
URI: http://www.repositorio.ufop.br/handle/123456789/8998
metadata.dc.identifier.uri2: http://onlinelibrary.wiley.com/doi/10.1111/aec.12446/full
metadata.dc.identifier.doi: https://doi.org/10.1111/aec.12446
ISSN: 1442-9993
Appears in Collections:DEBIO - Artigos publicados em periódicos

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