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Type: Artigo
Title: High Proportion Of Smaller Ranged Hummingbird Species Coincides With Ecological Specialization Across The Americas
Author: Sonne
Jesper; Gonzalez
Ana M. Martin; Maruyama
Pietro K.; Sandel
Brody; Vizentin-Bugoni
Jeferson; Schleuning
Matthias; Abrahamczyk
Stefan; Alarcon
Ruben; Araujo
Andrea C.; Araujo
Francielle P.; de Azevedo
Severino Mendes
Jr.; Baquero
Andrea C.; Cotton
Peter A.; Toftemark Ingversen
Tanja; Kohler
Glauco; Lara
Carlos; Maria Guedes Las-Casas
Flor; Machado
Adriana O.; Machado
Caio Graco; Alejandra Maglianesi
Maria; Moura
Alan Cerqueira; Nogues-Bravo
David; Oliveira
Genilda M.; Oliveira
Paulo E.; Ornelas
Juan Francisco; Rodrigues
Licleia da Cruz; Rosero-Lasprilla
Liliana; Rui
Ana Maria; Sazima
Marlies; Timmermann
Allan; Varassin
Isabela Galarda; Wang
Zhiheng; Watts
Stella; Fjeldsa
Jon; Svenning
Jens-Christian; Rahbek
Carsten; Dalsgaard
Abstract: Ecological communities that experience stable climate conditions have been speculated to preserve more specialized interspecific associations and have higher proportions of smaller ranged species (SRS). Thus, areas with disproportionally large numbers of SRS are expected to coincide geographically with a high degree of community-level ecological specialization, but this suggestion remains poorly supported with empirical evidence. Here, we analysed data for hummingbird resource specialization, range size, contemporary climate, and Late Quaternary climate stability for 46 hummingbird-plant mutualistic networks distributed across the Americas, representing 130 hummingbird species (ca 40% of all hummingbird species). We demonstrate a positive relationship between the proportion of SRS of hummingbirds and community-level specialization, i.e. the division of the floral niche among coexisting hummingbird species. This relationship remained strong even when accounting for climate, furthermore, the effect of SRS on specialization was far stronger than the effect of specialization on SRS, suggesting that climate largely influences specialization through species' range-size dynamics. Irrespective of the exact mechanism involved, our results indicate that communities consisting of higher proportions of SRS may be vulnerable to disturbance not only because of their small geographical ranges, but also because of their high degree of specialization.
Subject: Biogeography
Climate Gradients
Mutualistic Networks
Range Size
Editor: Royal SOC
Citation: Proceedings Of The Royal Society B-biological Sciences. Royal Soc, v. 283, p. , 2016.
Rights: fechado
Identifier DOI: 10.1098/rspb.2015.2512
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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