198 Works

Data from: The circular nature of recurrent life-cycle events: a test comparing tropical and temperate phenology

Vanessa Staggemeier, Maria Gabriela Gutierrez Camargo, José Alexandre Diniz-Filho, Robert Freckleton, Lucas Jardim & Patricia Morellato
1. The high diversity of plant species in the tropics has revealed complex phenological patterns and reproductive strategies occurring throughout the year. Describing and analysing tropical plant phenology, and detecting triggers, demands to consider the circular nature of recurrent life-cycle events and the use of appropriated statistical metrics. 2. Here we explore analytical pitfalls potentially affecting results of studies that do not consider the circular nature of phenology data when comparing resting and non-resting systems,...

Strandings of marine mammals, sea turtles and seabirds along the central-south coast of São Paulo, Brazil, from 2015 to 2018.

Rodrigo Del Rio Do Valle, Carolina Pacheco Bertozzi, Alencar Cabral & André Silva Barreto
To assess the potential impacts on seabirds, turtles and marine mammals from oil and gas production from the oceanic Pre-Salt province at Brazil’s Santos Basin, the Brazilian environmental agency (IBAMA) required PETROBRAS, the main oil company in the basin, to implement the “Programa de Monitoramento de Praias da Bacia de Santos” (Santos Basin Beach Monitoring Program - PMP-BS). Since 2015 PMP-BS has been operating along the states of Santa Catarina, Paraná, São Paulo and Rio...

Data from: Predicted 2100 climate scenarios affects growth and skeletal development of tambaqui (Colossoma macropomum) larvae

Ivã G. Lopes, Thyssia B. Araújo-Dairiki, Juliana T. Kojima, Adalberto L. Val & Maria C. Portella
Climate changes driven by greenhouse gas emissions have been occurring in an accelerated degree, affecting environmental dynamics and living beings. Among all affected biomes, the Amazon is particularly subjected to adverse impacts, such as temperature rises and water acidification. This study aimed to evaluate the impacts of predicted climate change on initial growth and development of an important Amazonian food fish, the tambaqui. We analyzed growth performance, and monitored the initial osteogenic process and the...

Data from: Rediscovery of the enigmatic fungus-farming ant \"Mycetosoritis\" asper Mayr (Hymenoptera: Formicidae): Implications for taxonomy, phylogeny, and the evolution of agriculture in ants

Jeffrey Sosa-Calvo, Ana Ješovnik, Heraldo L. Vasconcelos, , Ted R. Schultz & Mauricio Bacci
We report the rediscovery of the exceedingly rarely collected and enigmatic fungus-farming ant species Mycetosoritis asper. Since the description of the type specimen in 1887, only four additional specimens are known to have been added to the world's insect collections. Its biology is entirely unknown and its phylogenetic position within the fungus-farming ants has remained puzzling due to its aberrant morphology. In 2014 we excavated and collected twenty-one colonies of M. asper in the Floresta...

Data from: Body size and allometric shape variation in the molly Poecilia vivipara along a gradient of salinity and predation

Marcio S Araujo, S Ivan Perez, Maria Julia C Magazoni & Ana Cristina Petry
Background: Phenotypic diversity among populations may result from divergent natural selection acting directly on traits or via correlated responses to changes in other traits. One of the most frequent patterns of correlated response is the proportional change in the dimensions of anatomical traits associated with changes in growth or absolute size, known as allometry. Livebearing fishes subject to predation gradients have been shown to repeatedly evolve larger caudal peduncles and smaller cranial regions under high...

Data from: Long-distance pollen and seed dispersal and inbreeding depression in Hymenaea stigonocarpa (Fabaceae: Caesalpinioideae) in the Brazilian savannah

Marcela A. Moraes, Thaisa Y.K. Kubota, Bruno C. Rossini, Celso L. Marino, Miguel L.M. Freitas, Mario L.T. Moraes, Alexandre M. Da Silva, Jose Cambuim & Alexandre M. Sebbenn
Hymenaea stigonocarpa is a Neotropical tree that is economically important due to its high-quality wood; however, because it has been exploited extensively, it is currently considered threatened. Microsatellite loci were used to investigate the pollen and seed dispersal, mating patterns, spatial genetic structure (SGS), genetic diversity, and inbreeding depression in H. stigonocarpa adults, juveniles and open-pollinated seeds, which were sampled from isolated trees in a pasture and trees within a forest fragment in the Brazilian...

Data from: Cryptic genetic diversity is paramount in small-bodied amphibians of the genus Euparkerella (Anura: Craugastoridae) endemic to the Brazilian Atlantic Forest

Luciana A. Fusinatto, João Alexandrino, Célio F. B. Haddad, Tuliana O. Brunes, Carlos F. D. Rocha & Fernando Sequeira
Morphological similarity associated to restricted distributions and low dispersal abilities make the direct developing “Terrarana” frogs of the genus Euparkerella a good model for examining diversification processes. We here infer phylogenetic relationships within the genus Euparkerella, using DNA sequence data from one mitochondrial and four nuclear genes coupled with traditional Bayesian phylogenetic reconstruction approaches and more recent coalescent methods of species tree inference. We also used Bayesian clustering analysis and a recent Bayesian coalescent-based approach...

Data from: Defaunation and fragmentation erode small mammal diversity dimensions in tropical forests

Ricardo S. Bovendorp, Fernanda T. Brum, Robert A. McCleery, Benjamin Baiser, Rafael Loyola, Marcus V. Cianciaruso & Mauro Galetti
Forest fragmentation and defaunation are considered the main drivers of biodiversity loss, yet the synergistic effects of landscape changes and biotic interactions on assemblage structure have been poorly investigated. Here, we use an extensive dataset of 283 assemblages and 105 species of small mammals to understand how defaunation of medium and large mammals and forest fragmentation change the community composition and diversity of rodents and marsupials in tropical forests of South America. We used structured...

Data from: Contemporary and historic factors influence differently genetic differentiation and diversity in a tropical palm

Carolina C. Carvalho, Milton C. Ribeiro, Mauro Galetti & Rosane G. Collevatti
Population genetics theory predicts loss in genetic variability because of drift and inbreeding in isolated plant populations; however, it has been argued that long-distance pollination and seed dispersal may be able to maintain gene flow, even in highly fragmented landscapes. We tested how historical effective population size, historical migration and contemporary landscape structure, such as forest cover, patch isolation and matrix resistance, affect genetic variability and differentiation of seedlings in a tropical palm (Euterpe edulis)...

Data from: Partitioning the net effect of host diversity on an emerging amphibian pathogen

C. Guilherme Becker, David Rodriguez, Luís Felipe Toledo, Ana V. Longo, Carolina Lambertini, Décio T. Corrêa, Domingos S. Leite, Célio F. B. Haddad, Kelly R. Zamudio & D. T. Correa
The ‘dilution effect’ (DE) hypothesis predicts that diverse host communities will show reduced disease. The underlying causes of pathogen dilution are complex, because they involve non-additive (driven by host interactions and differential habitat use) and additive (controlled by host species composition) mechanisms. Here, we used measures of complementarity and selection traditionally employed in the field of biodiversity–ecosystem function (BEF) to quantify the net effect of host diversity on disease dynamics of the amphibian-killing fungus Batrachochytrium...

Data from: Evolutionary history of Scinax treefrogs on land-bridge islands in south-eastern Brazil

Rayna C. Bell, Cinthia A. Brasileiro, Celio F. B. Haddad & Kelly R. Zamudio
AIM: We investigated how Pleistocene refugia and recent (~12,000 years ago) sea level incursions shaped genetic differentiation in mainland and island populations of the Scinax perpusillus treefrog group. LOCATION: Brazilian Atlantic Forest, São Paulo state, southeastern Brazil. METHODS: Using mitochondrial and microsatellite loci, we surveyed population structure and genetic diversity in Scinax from five mainland populations and three land-bridge islands to understand the roles of Pleistocene forest fragmentation and sea level incursions on genetic differentiation....

Data from: Partitioning the relative contribution of one-phase and two-phase seed dispersal when evaluating seed dispersal effectiveness

Laurence Culot, Marie-Claude Huynen & Eckhard W. Heymann
Seed dispersal effectiveness (SDE) is a conceptual framework that aims at quantifying the contribution of seed dispersal vectors to plant fitness. While it is well recognized that diplochorous dispersal systems, characterized by two successive dispersal steps performed by two different vectors (Phase I = primary seed dispersal and Phase II = secondary seed dispersal) are common in temperate and tropical regions, little attention has been given to distinguishing the relative contribution of one-phase and two-phase...

Data from: The relationship between pond habitat depth and functional tadpole diversity in an agricultural landscape

Cássia De Souza Queiroz, Fernando Rodrigues Da Silva & Denise De Cerqueira Rossa-Feres
One of the most important goals of biodiversity studies is to identify which characteristics of local habitats act as filters that determine the diversity of functional traits along environmental gradients. In this study, we investigated the relationship between the environmental variables of ponds and the functional trait diversity distribution of anuran tadpoles in an agricultural area in southeastern Brazil. Our results show that the functional trait diversity of frog tadpoles has a bell-curve-shaped relationship with...

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...

Data from: Anatomy of the vegetative organs, inflorescence axis and pedicel in the Neoregelia bahiana complex (Bromeliaceae): taxonomic and ecological importance

Kleber Resende Silva, Leonardo M. Versieux & Aline Oriani
Delimitation of Bromeliaceae into genera or species is often problematic, as observed for the Neoregelia bahiana complex, distributed throughout the rocky fields of Espinhaço Range, Brazil. Considering that the anatomical characterisation of different organs is potentially important for taxonomic and ecological interpretation of this complex, we analysed roots, stems (stolon), leaves, inflorescence axes (peduncle), and pedicels in individuals from different populations. In all the studied individuals, the roots are composed of velamen, a heterogeneous cortex,...

Data from: Trading heat and hops for water: dehydration effects on locomotor performance, thermal limits, and thermoregulatory behavior of a terrestrial toad

Rodolfo C.O. Anderson, Denis V. Andrade & Rodolfo C. O. Anderson
Due to their highly permeable skin and ectothermy, terrestrial amphibians are challenged by compromises between water balance and body temperature regulation. The way in which such compromises are accommodated, under a range of temperatures and dehydration levels, impacts importantly the behavior and ecology of amphibians. Thus, using the terrestrial toad Rhinella schneideri as a model organism, the goals of this study were twofold. First, we determined how the thermal sensitivity of a centrally relevant trait—locomotion—was...

Data from: Genomic selection signatures and genetic variability of farmed tambaqui (Colossoma macropomum) in South America

Vito Mastrochirico-Filho, John Agudelo & Diogo Hashimoto
Tambaqui (Colossoma macropomum) represents the most important neotropical freshwater fish used in aquaculture from South America, whose production is concentrated at low latitudes (close to Equator 0º) where the water temperature is warmer. Understanding how selection shapes genetic variation and the level of genetic structure in farmed populations is of paramount meaning in evolutionary biology. High-throughput sequencing to generate genome-wide data for non-model species allows determining the genomic basis of adaptation to local or farmed...

Forest cover and connectivity have pervasive effects on the maintenance of evolutionary distinct interactions in seed dispersal networks

Erison Carlos Dos Monteiro, Marco Pizo, Maurício Humberto Vancine & MIlton Ribeiro
Seed dispersal by animals is one of the most important ecological processes in tropical forests, entailing millions of years of evolutionary adaptations of plants and frugivorous animals forming networks of interactions that, ultimately, contribute to the resilience of such forests. We analyze 29 seed dispersal networks in the threatened Atlantic Forest biodiversity hotspot, with data on the frequency of feeding visits by birds to fruiting plants to answer: (1) which are the effects of forest...

Tayra (eira barbara) landscape use as a function of cover types, forest protection, and the presence of puma and free-ranging dogs

Rita Bianchi, Julianna Jenkins, Damon Lesmeister, Jéssica Gouvea, Clarice Cesário, Larissa Fornitano, Mateus Oliveira, Kimberly Morais, Renan Ribeiro & Matthew Gompper
The tayra (Eira barbara) is a common and broadly distributed Neotropical carnivore, yet is not well-studied. While this species is apparently associated with forested habitats, it also appears tolerant of some anthropogenic disturbance. We deployed 57 unbaited camera traps (n = 4,923 trap-days) in and around a protected area (Furnas do Bom Jesus State Park, São Paulo, Brazil) to survey for tayra and two potentially interactive species: puma (Puma concolor) and free-ranging dogs (Canis familiaris)....

Effect of daily use of fluoride toothpaste and bleaching gels formulated with sodium trimetaphosphate nano-sized on the aesthetic effectiveness, mechanical and morphological properties of dental enamel

Amanda Scarpin Gruba
The objective of this work will be to evaluate in vitro the addition of a new bleaching agent containing sodium trimetaphosphate (TMP) nanoparticles associated with sodium fluoride 0.1% and 35% hydrogen peroxide on color change, properties mechanical and morphological characteristics of the enamel, using fluoride toothpaste.

Abordagem probabilística em estudos de ruptura de barragens de rejeitos com fins de definição de metodologia consistente

Yuri Taglieri Sáo
Barragens de rejeitos são estruturas que armazenam grandes volumes de materiais não-aproveitáveis economicamente (rejeitos) da mineração. Tais estruturas apresentam riscos extraordinários para comunidades, infraestrutura e meio ambiente, visto que há a possibilidade de falhas e consequente ruptura da barragem, liberando volumes consideráveis de rejeitos no vale a jusante. Estudos numéricos de ruptura de barragens são executados para estimar danos ambientes, sociais e econômicos, bem como planejar ações de mitigação de danos e planos de emergência,...

Development of novel magnetic nanocomposites based on hydrogel for evaluation as carrier vehicle of drugs and agricultural inputs

Fauze Aouada
With the advances of the world technology, the use of conventional methods in agribusiness is decreasing due to the increase of the use of precision agriculture that appears as a modern mechanism, reflecting a new model of productivity together with environment qualification. Linked to precision agriculture, it can be highlighted in the development of biodegradable hydrogels and their nanocomposites as carrier vehicles for controlled release. In parallel, the economy suffers with high cost of inputs...

Efeitos tardios da exposição ao bisfenol A na mama de fêmeas de gerbilos durante o período gestacional e lactacional

Thalles Ruiz
As glândulas mamárias compõem um órgão associado ao sistema reprodutor feminino que sofre influência de hormônios esteroides. Fêmeas na fase senil apresentam propensão ao desenvolvimento de neoplasias e tumores no tecido mamário. Neste sentido, alguns desreguladores endócrinos, como o bisfenol A (BPA) vêm sendo estudados como potenciais causadores de inflamações tumorais e do câncer em órgãos associados ao sistema reprodutor. A exposição ao BPA durante a fase de produção lactacional pode causar alterações em receptores...

Aplicação das Meta-heurísticas Algoritmo Genético e Busca em Vizinhança Variável no Dimensionamento Ótimo de um Sistema de Backup Híbrido para Serviços Auxiliares em Subestações

John Franco
As subestações de energia são um dos principais componentes do sistema elétrico de potência, permitindo conectar redes de diferentes níveis de tensão e exercendo funções de coordenação e controle de vital importância para a estabilidade do sistema. Nas subestações, os serviços auxiliares devem assegurar o suprimento das cargas que compõem os sistemas de monitoramento, comunicação e manobra. Em casos de contingência no fornecimento, as subestações requerem a manutenção dos serviços auxiliares para garantir funções essenciais...

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