Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/242552
Type: Artigo de periódico
Title: The Macroecology Of Phylogenetically Structured Hummingbird-plant Networks
Author: Gonzalez
Ana M. Martin; Dalsgaard
Bo; Nogues-Bravo
David; Graham
Catherine H.; Schleuning
Matthias; Maruyama
Pietro K.; Abrahamczyk
Stefan; Alarcon
Ruben; Araujo
Andrea C.; Araujo
Francielle P.; de Azevedo
Severino Mendes
Jr.; Baquero
Andrea C.; Cotton
Peter A.; Ingversen
Tanja Toftemark; Kohler
Glauco; Lara
Carlos; Guedes Las-Casas
Flor Maria; Machado
Adriana O.; Machado
Caio Graco; Alejandra Maglianesi
Maria; McGuire
Jimmy A.; Moura
Alan Cerqueira; Oliveira
Genilda M.; Oliveira
Paulo E.; Francisco Ornelas
Juan; Rodrigues
Licleia da Cruz; Rosero-Lasprilla
Liliana; Rui
Ana M.; Sazima
Marlies; Timmermann
Allan; Varassin
Isabela Galarda; Vizentin-Bugoni
Jeferson; Wang
Zhiheng; Watts
Stella; Rahbek
Carsten; Martinez
Neo D.
Abstract: Aim To investigate the association between hummingbird-plant network structure and species richness, phylogenetic signal on species' interaction pattern, insularity and historical and current climate. Location Fifty-four communities along a c. 10,000 km latitudinal gradient across the Americas (39 degrees N-32 degrees S), ranging from sea level to c. 3700 m a.s.l., located on the mainland and on islands and covering a wide range of climate regimes. Methods We measured the level of specialization and modularity in mutualistic plant-hummingbird interaction networks. Using an ordinary least squares multimodel approach, we examined the influence of species richness, phylogenetic signal, insularity and current and historical climate conditions on network structure (null-model-corrected specialization and modularity). Results Phylogenetically related species, especially plants, showed a tendency to interact with a similar array of mutualistic partners. The spatial variation in network structure exhibited a constant association with species phylogeny (R-2 = 0.18-0.19); however, network structure showed the strongest association with species richness and environmental factors (R-2 = 0.20-0.44 and R-2 = 0.32-0.45, respectively). Specifically, higher levels of specialization and modularity were associated with species-rich communities and communities in which closely related hummingbirds visited distinct sets of flowering species. On the mainland, specialization was also associated with warmer temperatures and greater historical temperature stability. Main conclusions Our results confirm the results of previous macroecological studies of interaction networks which have highlighted the importance of species richness and the environment in determining network structure. Additionally, for the first time, we report an association between network structure and species phylogenetic signal at a macroecological scale, indicating that high specialization and modularity are associated with high interspecific competition among closely related hummingbirds, subdividing the floral niche. This suggests a tighter co-evolutionary association between hummingbirds and their plants than in previously studied plant-bird mutualistic systems.
Subject: Animal Mutualistic Networks
Seed-dispersal Networks
Ecological Networks
Pollination Networks
Community Ecology
Climate-change
West-indies
Specialization
Determinants
Modularity
Country: HOBOKEN
Editor: WILEY-BLACKWELL
Citation: The Macroecology Of Phylogenetically Structured Hummingbird-plant Networks. Wiley-blackwell, v. 24, p. 1212-1224 NOV-2015.
Rights: fechado
Identifier DOI: 10.1111/geb.12355
Address: http://onlinelibrary.wiley.com/doi/10.1111/geb.12355/epdf
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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