The influence of biogeographical and evolutionary histories on morphological trait-matching and resource specialization in mutualistic hummingbird-plant networksBo Dalsgaard, Pietro Maruyama, Jesper Sonne, Katrine Hansen, Thais Zanata, Stefan Abrahamczyk, Ruben Alarcon, Andréa Araujo, Francielle Araújo, Silvana Buzato, Edgar Chávez-González, Aline Coelho, Pete Cotton, Román Díaz-Valenzuela, Maria Dufke, Paula Enríquez, Manoel Martins Dias Filho, Erich Fischer, Glauco Kohler, Carlos Lara, Flor Maria Las-Casas, Liliana Rosero Lasprilla, Adriana Machado, Caio Machado, Maria Maglianesi … & Ana M. Martín González
Functional traits can determine pairwise species interactions, such as those between plants and pollinators. However, the effects of biogeography and evolutionary history on trait-matching and trait-mediated resource specialization remain poorly understood. We compiled a database of 93 mutualistic hummingbird-plant networks (including 181 hummingbird and 1,256 plant species), complemented by morphological measures of hummingbird bill and floral corolla length. We divided the hummingbirds into their principal clades and used knowledge on hummingbird biogeography to divide the...
Delayed color maturation of a sexual ornament in males of a damselfly: crypsis, female mimicry or both?Rodrigo Cezário, Eralci Therezio, Alexandre Marletta, Stanislav Gorb & Rhainer Guillermo-Ferreira
Dynamic signals are a widespread phenomenon in several taxa, usually associated with intraspecific communication. On the other hand, dynamic iridescent signals are only detectable at specific angles of illumination; hence, the animal can hide the signal to avoid detection when necessary. This structural coloration is mostly dependent on illumination, contrast against the background and the vision of the receiver. Complex behavioural displays may be coupled with structural coloration to create dynamic visual signals that enhance...
Higher probability of tick infestation reveals a hidden cost of army ant-following in Amazonian birdsAlan Fecchio, Thiago F. Marins, Maria Ogrzewalska, Fabio Schunck, Jason D. Weckstein & Raphael I. Dias
The foraging specialization of army-ant-following birds has long intrigued ecologists and provided numerous questions such as why, how, and when did this foraging guild specialization arise and evolve. Many of the answers to these questions have focused on ecological interactions such as predation and competition, whereas little has been done to study the potential effects of host-parasite interactions among members of this foraging guild. Using 1,177 Amazonian birds from 187 species, we studied the probability...
Aim: Amazonian forests predominantly grow on highly weathered and nutrient poor soils. Anthropogenically enriched Amazonian Dark Earths (ADE), traditionally known as Terra Preta de Índio), were formed by pre-Columbian populations. ADE soils are characterized by increased fertility and have continued to be exploited following European colonization. Here, we evaluated the legacy of land-use and soil enrichment on the composition and structure in ADE and NDE forests. Location: Eeastern and southern Amazonia Time period: Pre-Columbia -...
Our experiment revealed unexpected behavioral strategies involved in seed predation of Mabea fistulifera by fish (Brycon cephalus), including temporal storage of seeds in the stomach followed by regurgitation and reingestion of individual seeds. Larger fish were faster at removing the seed coat and exposing the endosperm, due to precise oral manipulation of seeds.
Effectiveness of acute L-arginine supplementation on physical performance in strength training: a systematic review and meta-analysisCamila Pasa, Ruberlei Godinho De Oliveira, Thiago Da Rosa Lima, Michelle Jalousie Kommers, Karla Régia Ferreira Viana Figueiredo, Waléria Christiane Rezende Fett & Carlos Alexandre Fett
The oral administration of L-arginine has been related to improved physical performance due to a likely reduction in muscle fatigue, resulting from the vasodilator effect of nitric oxide on skeletal muscle. However, there is no precise and quantitative analysis of the information in the literature. Objective: The main objective was to assess the effectiveness of L-arginine supplementation on physical performance in strength training with a systematic review and meta-analysis. Methods: Systematic review and meta-analysis, the...
Implications of overfishing of frugivorous fishes for cryptic function loss in a Neotropical floodplainJoisiane Araujo, Sandra Bibiana Correa, Jerry Penha, Jill Anderson & Anna Traveset
Many frugivorous animals act simultaneously as seed predators and dispersers, and shifts in the abundance and mean phenotype of the frugivore population can alter the prevalence of antagonistic vs mutualistic interactions with seeds. Here, we evaluated how a reduction in the abundance and species richness of large-bodied frugivorous fishes affects their interactions with plants in a Neotropical floodplain. Fisheries selectively harvest large frugivorous fishes, which are the most effective seed dispersers. Thus, functional extinctions of...
This dataset cointains data used for the study of Müllerian mimicry in coral snakes. Coral snakes in the genus Micrurus are venomous, aposematic organisms that signal danger to predators through vivid colouration. Previous studies found that they serve as models to several harmless species of Batesian mimics. However, the extent to which Micrurus species engage in Müllerian mimicry remains poorly understood. We integrate detailed morphological and geographical distribution data to investigate if coral snakes are...
Universidade Federal de Mato Grosso8
Federal University of São Carlos2
University of Sao Paulo2
University of Exeter2
Federal University of Uberlândia2
Centro Universitário de Várzea Grande1
University of Georgia1
Universidade Federal de Minas Gerais1
Senckenberg Biodiversity and Climate Research Centre1
Universidade Estadual do Rio Grande do Sul1