34 Works

Haemosporidian parasites of Neotropical birds: causes and consequences of infection

Vincenzo A. Ellis, Alan Fecchio & Robert E. Ricklefs
Haemosporidian parasites of the genera Plasmodium, Haemoproteus, and Leucocytozoon are among the best studied parasites of Neotropical birds. Here, we describe variation in haemosporidian prevalence (i.e., the proportion of infected birds in a sampled population) in Neotropical birds. We review correlates of haemosporidian prevalence (including several avian life-history traits, climate, and season) and the population and evolutionary consequences of infection for Neotropical birds. We find that prevalence varies among avian taxonomic families, genera, and even...

Higher probability of tick infestation reveals a hidden cost of army ant-following in Amazonian birds

Alan 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...

Data from: Drivers of individual niche variation in coexisting species

Raul Costa-Pereira, Volker H.W. Rudolf, Franco L. Souza, Marcio S. Araujo & Volker H. W. Rudolf
1. Although neglected by classic niche theory, individual variation is now recognized as a prevalent phenomenon in nature with evolutionary and ecological relevance. Recent theory suggests that differences in individual variation across competitors can affect species coexistence and community patterns. However, the degree of individual variation is flexible across wild populations and we still know little about the ecological drivers of this variation across populations of single species and, especially, across coexisting species. 2. Here...

Data from: Seasonal population and individual niche dynamics in a tetra fish in the Pantanal wetlands

Raul Costa-Pereira, Luiz E. R. Tavares, Plínio Barbosa De Camargo & Márcio Silva Araújo
In seasonal tropical regions, rainfall and/or temporary floods during the wet season generally increase the abundance and diversity of food resources to many consumers as compared to the dry season. Therefore, seasonality can affect intraspecific competition and ecological opportunity, which are two important ecological mechanisms underlying population and individual niche variations. Here, we took advantage of the strong seasonality in the Pantanal wetlands to investigate how within- and between-individual diet variations relate to seasonal population...

Data from: Satellite image texture for the assessment of tropical anuran communities

Larissa Sayuri Moreira Sugai, José Luiz Massao Moreira Sugai, Vanda Lucia Ferreira & Thiago Sanna Freire Silva
The relationship between environmental heterogeneity and biodiversity represents a cornerstone of ecological research. While environmental descriptors over large extents usually have medium to low spatial resolution, in-situ measures provide accurate information for limited areas, and a gap remains in providing remote descriptors that represent local environmental structure. Texture from satellite images can represent fine-scale heterogeneity over wide spatial coverage, but to date, it has mostly been used to predict general aspects of species diversity, such...

Data from: Jaguar Movement Database: a GPS-based movement dataset of an apex predator in the Neotropics

Ronaldo G. Morato, Jeffrey J. Thompson, Agustín Paviolo, J. Antonio De La Torre, Fernando Lima, , Rogério C. Paula, , Leandro Silveira, Daniel L.Z. Kantek, Emiliano E. Ramalho, Louise Maranhão, Mario Haberfeld, Denis A. Sana, Rodrigo A. Medellin, Eduardo Carrillo, Victor Montalvo, Octavio Monroy-Vilchis, Paula Cruz, Anah Tereza Jácomo, Natalia M. Torres, Giselle B. Alves, Ivonne Cassaigne, Ron Thompson, Carolina Saenz-Bolanos … & Joares A. May
The field of movement ecology has rapidly grown during the last decade, with important advancements in tracking devices and analytical tools that have provided unprecedented insights into where, when, and why species move across a landscape. Although there has been an increasing emphasis on making animal movement data publicly available, there has also been a conspicuous dearth in the availability of such data on large carnivores. Globally, large predators are of conservation concern. However, due...

Data from: The influence of spatial sampling scales on ant-plant interaction network architecture

Wesley Dáttilo, Jeferson Vizentin-Bugoni, Vanderlei J. Debastiani, Pedro Jordano & Thiago J. Izzo
1.Despite great interest in metrics to quantify the structure of ecological networks, the effects of sampling and scale remain poorly understood. In fact, one of the most challenging issues in ecology is how to define suitable scales (i.e., temporal or spatial) to accurately describe and understand ecological systems. 2.Here, we sampled a series of ant‐plant interaction networks in the southern Brazilian Amazon rainforest in order to determine whether the spatial sampling scale, from local to...

Data from: Stability and generalization in seed dispersal networks: a case study of frugivorous fish in Neotropical wetlands

Sandra Bibiana Correa, Joisiane K. Araujo, Jerry Penha, Catia Nunes Da Cunha, Karen E. Bobier, Jill T. Anderson & Joisiane K. Arujo
When species within guilds perform similar ecological roles, functional redundancy can buffer ecosystems against species loss. Using data on the frequency of interactions between fish and fruit, we assessed whether co-occurring frugivores provide redundant seed dispersal services in three species-rich Neotropical wetlands. Our study revealed that frugivorous fishes have generalized diets; however, large-bodied fishes had greater seed dispersal breadth than small species, in some cases, providing seed dispersal services not achieved by smaller fish species....

Behavioural and morphological traits influence sex-specific floral resource use by hummingbirds

Maria Alejandra Maglianesi, Pietro Maruyama, Ethan Temeles, Matthias Schleuning, Thais Zanata, Marlies Sazima, Aquiles Gutiérrez-Zamora, Oscar Marín-Gómez, Liliana Rosero-Lasprilla, Monica Ramirez Burbano, Alejandra Ruffini, Ricardo Salamanca-Reyes, Ivan Sazima, Laura E. Nuñez-Rosas, María Del Coro Arizmendi, Carsten Rahbek & Bo Dalsgaard
Research on resource partitioning in plant-pollinator mutualistic systems is mainly concentrated at the levels of species and communities, whereas differences between males and females are typically ignored. Nevertheless, pollinators often show large sexual differences in behaviour and morphology, which may lead to sex-specific patterns of resource use with the potential to differentially affect plant reproduction and diversification. We investigated variation in behavioural and morphological traits between sexes of hummingbird species as potential mechanisms underlying sex-specific...

The influence of biogeographical and evolutionary histories on morphological trait-matching and resource specialization in mutualistic hummingbird-plant networks

Bo 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...

Literatura Digital Brasileira: uma abordagem sistêmica

Rejane Rocha
A emergência e a popularização dos novos meios (MANOVICH, 2005) têm alterado substancialmente a produção, a circulação, a leitura e os parâmetros de avaliação e crítica dos objetos culturais, dentre eles a literatura. O desenvolvimento do projeto (CNPq 405609/2018-3) Repositório da literatura digital brasileira, nos últimos três anos, evidenciou e especificou essas alterações no contexto brasileiro, gerando dados, informações e pesquisas a ele atreladas que sugerem o delineamento inicial de um sistema literário (EVEN-ZOHAR, 2017)...

Data from: Moving in the Anthropocene: global reductions in terrestrial mammalian movements

Marlee A. Tucker, Katrin Böhning-Gaese, William F. Fagan, John M. Fryxell, Bram Van Moorter, Susan C. Alberts, Abdullahi H. Ali, Andrew M. Allen, Nina Attias, Tal Avgar, Hattie Bartlam-Brooks, Buuveibaatar Bayarbaatar, Jerrold L. Belant, Alessandra Bertassoni, Dean Beyer, Laura Bidner, Floris M. Van Beest, Stephen Blake, Niels Blaum, Chloe Bracis, Danielle Brown, P. J. Nico De Bruyn, Francesca Cagnacci, Justin M. Calabrese, Constança Camilo-Alves … & Thomas Mueller
Animal movement is fundamental for ecosystem functioning and species survival, yet the effects of the anthropogenic footprint on animal movements have not been estimated across species. Using a unique GPS-tracking database of 803 individuals across 57 species, we found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the extent of their movements in areas with a low human footprint. We attribute this reduction to behavioral...

Data from: Seasonal flooding, topography, and organic debris interact to influence the emergence and distribution of seedlings in a tropical grassland

Francielli Bao, Tracy Elsey-Quirk, Marco Antonio De Assis, Rafael Arruda & Arnildo Pott
In seasonally flooded wetlands, natural disturbances such as flooding and associated organic debris deposition followed by a drawdown period provide various opportunities for plant species regeneration, which can promote plant community diversity across space and time. Specifically, regeneration may be influenced by the direct effect of flooding on seed dispersal and seedling emergence as well as the indirect effect of organic debris on seed trapping and germination. Our objective was to examine the influence of...

Data from: Asymmetric dispersal and colonization success of Amazonian plant-ants queens

Emilio M. Bruna, Thiago J. Izzo, Brian D. Inouye, Maria Uriarte & Heraldo L. Vasconcelos
Background: The dispersal ability of queens is central to understanding ant life-history evolution, and plays a fundamental role in ant population and community dynamics, the maintenance of genetic diversity, and the spread of invasive ants. In tropical ecosystems, species from over 40 genera of ants establish colonies in the stems, hollow thorns, or leaf pouches of specialized plants. However, little is known about the relative dispersal ability of queens competing for access to the same...

Data from: The importance of scattered trees for biodiversity conservation: a global meta-analysis

Jayme A. Prevedello, Mauricio Almeida-Gomes & David B. Lindenmayer
1. Scattered trees are thought to be keystone structures for biodiversity in landscapes worldwide. However, such trees have been largely neglected by researchers and their importance for biodiversity remains unclear. 2. We completed a global meta-analysis to quantify relationships between scattered trees and the species richness, abundance and composition of vertebrates, arthropods and plants. First, we tested whether areas near scattered trees support higher levels of species richness and abundance than nearby open areas. Second,...

Data from: Temporal variation in plant-pollinator networks from seasonal tropical environments: higher specialization when resources are scarce

Camila S. Souza, Pietro K. Maruyama, Camila Aoki, Maria Rosangela Sigrist, Josué Raizer, Caroline L. Gross & Andréa C. De Araujo
The temporal dynamics of plant phenology and pollinator abundance across seasons should influence the structure of plant-pollinator interaction networks. Nevertheless, such dynamics are seldom considered, especially for diverse tropical networks. Here, we evaluated the temporal variation of four plant-pollinator networks in two seasonal ecosystems in Central Brazil (Cerrado and Pantanal). Data were gathered on a monthly basis over one year for each network. We characterized seasonal and temporal shifts in plant-pollinator interactions, using temporally discrete...

Legacy of Amazonian Dark Earth soils on forest structure and species composition

EDMAR Oliveira, Ben Hur Marimon-Junior, Beatriz Marimon, José Iriarte, Paulo Morandi, Yoshi Maezumi, Denis Nogueira, Luiz Aragão, Izaias Silva & Ted Feldpausch
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 -...

Seed predation by amazon fish

Lucelia Carvalho
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.

Data from: Vocal behavior of the Undulated Tinamou (Crypturellus undulatus) over an annual cycle in the Brazilian Pantanal: new ecological information

Cristian Pérez-Granados, Karl-L Schuchmann & Marinez Marques
Tinamous (Tinamidae) are a group of Neotropical birds for which little information is available. The Undulated Tinamou (Crypturellus undulatus) is one of the most widespread species but also declining. Due to its secretive habits, ecological knowledge regarding the species relies on few anecdotal descriptions. We used automated recorders to monitor the vocal activity of the species over an annual cycle at four sites in the Brazilian Pantanal. We provide a description and analyze the diel...

Data from: Water and fish select for fleshy fruits in tropical wetland forests

Sandra Bibiana Correa, Patricia Carla De Oliveira, Catia Nunes Da Cunha, Jerry Penha, Jill T. Anderson & Sandra Correa
Adjacent floodplain and upland tropical forests experience the same temperature and precipitation regimes, but differ substantially in plant species composition and biotic interactions because of extensive flooding. We hypothesize that flooded forests filter fruiting traits linked to seed dispersal by water and fishes, such that selection by water and fish led to (1) trees that synchronize the timing of fruiting with annual floods, and (2) the evolution of fleshy tissues on fruits to improve buoyancy...

Data from: Metapopulation dynamics of the mistletoe and its host in savanna areas with different fire occurrence

Grazielle Sales Teodoro, Eduardo Van Den Berg & Rafael Arruda
Mistletoes are aerial hemiparasitic plants which occupy patches of favorable habitat (host trees) surrounded by unfavorable habitat and may be possibly modeled as a metapopulation. A metapopulation is defined as a subdivided population that persists due to the balance between colonization and extinction in discrete habitat patches. Our aim was to evaluate the dynamics of the mistletoe Psittacanthus robustus and its host Vochysia thyrsoidea in three Brazilian savanna areas using a metapopulation approach. We also...

Data from: Competition and resource breadth shape niche variation and overlap in multiple trophic dimensions

Raul Costa-Pereira, Marcio S. Araújo, Franco L. Souza & Travis Ingram
Competition plays a central role in the maintenance of biodiversity. A backbone of classic niche theory is that local coexistence of competitors is favoured by the contraction or divergence of species’ niches. However, this effect should depend on the diversity of resources available in the local environment, particularly when resources vary in multiple ecological dimensions. Here, we investigated how available resource breadth (i.e., prey diversity) and competition together shape multidimensional niche variation (between and within...

Measure of leaf area removed by insects in plants growing on gaps with and without ant gardens

Thiago Izzo
This databank compreend the instantaneous measure of leaf area removed by insects in 5 leaves of 1306 plants growing on gaps with and without ant gardens. The ant gardens (AGs) are associations of epyfites, planted and mantained by mutualistic ants whose defend this plants agaist herbivores. The ants are not restricted to the AGs, but instead, forage for food, particularly extrafloral nectar of plants growing along the gap area. Particularly on Amazon forest, the most...

Effectiveness of acute L-arginine supplementation on physical performance in strength training: a systematic review and meta-analysis

Camila 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...

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