190 Works

Data from: Transcontinental dispersal, ecological opportunity and origins of an adaptive radiation in the Neotropical catfish genus Hypostomus (Siluriformes: Loricariidae)

Gabriel Silva, Fabio Roxo, Nathan Lujan, Victor Tagliacolo, Cláudio Zawadzki, Claudio Oliveira, Victor A. Tagliacollo & Nathan K. Lujan
Ecological opportunity is often proposed as a driver of accelerated diversification, but evidence has been largely derived from either contemporary island radiations or the fossil record. Here, we investigate the potential influence of ecological opportunity on a transcontinental radiation of South American freshwater fishes. We generate a species-dense, time-calibrated molecular phylogeny for the suckermouth armored catfish subfamily Hypostominae, with a focus on the species-rich and geographically widespread genus Hypostomus. We use the resulting chronogram to...

Data from: Kin-bias, breeding site selection, and female fitness in a cannibalistic Neotropical frog

Pavitra Muralidhar, Fábio P. De Sá, Célio F. B. Haddad & Kelly R. Zamudio
Resource availability influences sexual selection within populations and determines whether behaviours such as territoriality or resource sharing are adaptive. In Thoropa taophora, a frog endemic to the Atlantic Coastal Rainforest of Brazil, males compete for and defend limited breeding sites while females often share breeding sites with other females; however, sharing breeding sites may involve costs due to cannibalism by conspecific tadpoles. We studied a breeding population of T. taophora to determine (i) whether this...

Data from: Barriers, rather than refugia, underlie the origin of diversity in toads endemic to the Brazilian Atlantic Forest

Maria Tereza C. Thomé, Kelly R. Zamudio, Célio F. B. Haddad & João Alexandrino
In this study, we investigated the relative contribution of geographic barriers and Pleistocene refuges in the diversification of the Rhinella crucifer species complex, a group of endemic toads with a widespread distribution in the Brazilian Atlantic Forest (AF). We used intensive sampling and multilocus DNA sequence data to compare nucleotide diversity between refuge and nonrefuge areas, investigate regional demographic patterns, estimate demographic parameters related to genetic breaks and test refuge versus barrier scenarios of diversification...

Worldwide evidence of a unimodal relationship between productivity and plant species richness

Lauchlan H. Fraser, Jason Pither, Anke Jentsch, Marcelo Sternberg, Martin Zobel, Diana Askarizadeh, Sandor Bartha, Carl Beierkuhnlein, Jonathan A. Bennett, Alex Bittel, Bazartseren Boldgiv, Ilsi I. Boldrini, Edward Bork, Leslie Brown, Marcelo Cabido, James Cahill, Cameron N. Carlyle, Giandiego Campetella, Stefano Chelli, Ofer Cohen, Anna-Maria Csergo, Sandra Diaz, Lucas Enrico, David Ensing, Alessandra Fidelis … & Szilárd Szentes
The search for predictions of species diversity across environmental gradients has challenged ecologists for decades. The humped-back model (HBM) suggests that plant diversity peaks at intermediate productivity; at low productivity few species can tolerate the environmental stresses, and at high productivity a few highly competitive species dominate. Over time the HBM has become increasingly controversial, and recent studies claim to have refuted it. Here, by using data from coordinated surveys conducted throughout grasslands worldwide and...

Data from: Insights on the functional composition of specialist and generalist birds throughout continuous and fragmented forests

Luiz Dos Anjos, Gabriela Menezes Bochio, Hugo Reis Medeiros, Bia De Arruda Almeida, Barbara Rocha Arakaki Lindsey, Larissa Corsini Calsavara, Milton Cezar Ribeiro & José Marcelo Domingues Torezan
A decline in species number often occurs after forest fragmentation and habitat loss, which usually results in the loss of ecological functions and a reduction in functional diversity in the forest fragments. However, it is uncertain whether these lost ecological functions are consistently maintained throughout continuous forests, and so the importance of these functions in continuous forests remains unknown. Point counts were used to assess both the taxonomic and functional diversity of specialist and generalist...

Data from: Beyond neutral and forbidden links: morphological matches and the assembly of mutualistic hawkmoth-plant networks

Federico D. Sazatornil, Marcela Moré, Santiago Benitez-Vieyra, Andrea A. Cocucci, Ian J. Kitching, Boris O. Schlumpberger, Paulo E. Oliveira, Marlies Sazima & Felipe W. Amorim
A major challenge in evolutionary ecology is to understand how co-evolutionary processes shape patterns of interactions between species at community level. Pollination of flowers with long corolla tubes by long-tongued hawkmoths has been invoked as a showcase model of co-evolution. Recently, optimal foraging models have predicted that there might be a close association between mouthparts' length and the corolla depth of the visited flowers, thus favouring trait convergence and specialization at community level. Here, we...

Non ou a vã glória de mandar: um retrato identitário e geopolítico de Portugal

Mariana Veiga Copertino F. da Silva
Cinema & Território: Revista Internacional de Arte e Antropologia das Imagens, nº 2, 2017, 17-26.

Data from: De novo assembly and characterization of leaf and floral transcriptomes of the hybridizing bromeliad species (Pitcairnia spp.) adapted to Neotropical Inselbergs

C. Palma-Silva, M. Ferro, M. Bacci & A. C. Turchetto-Zolet
We present the leaf and floral transcriptomes of two hybridizing bromeliad species that differ in their major pollinator systems. Here we identified candidate genes responsible for pollinator attraction and reproductive isolation in these two species. We searched for candidate genes involved in floral traits, such as color. Approximately 34 Gbp of cDNA sequence data were produced from both tissues and species, resulting in a total of 424,506,914 raw reads. The de novo-assembled transcriptomes consisted of...

Data from: Phylogeographic model selection leads to insight into the evolutionary history of four-eyed frogs

Maria Tereza C. Thome & Bryan C. Carstens
Phylogeographic research investigates biodiversity at the interface between populations and species, in a temporal and geographic context. Phylogeography has benefited from analytical approaches that allow empiricists to estimate parameters of interest from the genetic data (e.g., θ = 4Neμ, population divergence, gene flow), and the widespread availability of genomic data allow such parameters to be estimated with greater precision. However, the actual inferences made by phylogeographers remain dependent on qualitative interpretations derived from these parameters’...

Data from: Successful carnivore identification with faecal DNA across a fragmented Amazonian landscape

Fernanda Michalski, Fernanda Pedone Valdez, Darren Norris, Chris Zieminski, Cyntia Kayo Kashivakura, Cristine S. Trinca, Heath B. Smith, Carly Vynne, Samuel K. Wasser, Jean Paul Metzger & Eduardo Eizirik
The use of scat surveys to obtain DNA has been well documented in temperate areas, where DNA preservation may be more effective than in tropical forests. Samples obtained in the tropics are often exposed to high humidity, warm temperatures, frequent rain, and intense sunlight, all of which can rapidly degrade DNA. Despite these potential problems, we demonstrate successful DNA amplification and sequencing for faeces of carnivores collected in tropical conditions and quantify how sample condition...

Vertical profile data of light transmission in Atlantic forests along a disturbance gradient

S. Fauset, M.U. Gloor, M.A.P. Aidar, H.C. Freitas, N.M. Fyllas, C.A. Joly, M.A. Marabesi, A.L.C. Rochelle, A. Shenkin & S.A. Vieira
The data set contains vertical profiles of diffuse light transmittance measured within six forest plots in montane Atlantic forest, São Paulo state, Brazil. The plots measured include intact, previously logged and secondary forest in a large continuous forest block of the Serra do Mar State Park (Parque Estadual de Serra do Mar), and two forest fragments outside the park. In each plot 10 - 12 individual light profiles were recorded; the data set contains these...

Data from: A new species of Allophryne (Anura: Allophrynidae) from the Atlantic Rain Forest biome of eastern Brazil

Ulisses Caramaschi, Victor G. D. Orrico, Julián Faivovich, Iuri R. Dias & Mirco Solé
A new species of the genus Allophryne is described and, in contrast to its congeners that occur in the Amazon Basin, is based on specimens obtained in Uruçuca, State of Bahia, in the Atlantic Rain Forest of eastern Brazil. Allophryne relicta sp. nov. is characterized by a medium body size for the genus (snout–vent length range 19.9–21.9 mm in males); large head (head width about 35% of SVL); large, red-orange eyes, with a large black...

Data from: Molecular phylogeny of Aphyocharacinae (Characiformes, Characidae) with morphological diagnoses for the subfamily and recognized genera

Victor A. Tagliacollo, Rosana Souza-Lima, Ricardo C. Benine & Claudio Oliveira
The subfamily Aphyocharacinae was recently redefined to comprise eight genera: Aphyocharax, Prionobrama, Paragoniates, Phenagoniates, Leptagoniates, Xenagoniates, Rachoviscus and Inpaichthys. This new composition, however, is partly incongruent with results of published molecular studies especially with regards to the positions of Rachoviscus and Inpaichthys. Our goal was to investigate the monophyly of Aphyocharacinae and its interrelationships using three distinct phylogenetic methodologies: Maximum–likelihood and Bayesian analyses of molecular data, and also Parsimony analysis of a concatenated molecular and...

Data from: Rare frost events reinforce tropical savanna-forest boundaries

William A. Hoffmann, Samuel W. Flake, Rodolfo C.R. Abreu, Natashi A.L. Pilon, Davi R. Rossatto, Giselda Durigan & Rodolfo C. R. Abreu
1) The ability of vegetation to ameliorate or exacerbate environmental extremes can generate feedbacks that mediate the distribution of biomes. It has been suggested that feedbacks between vegetation and frost damage may be important for maintaining savanna, particularly at the edge of the tropics. 2) We quantified frost damage and air temperature across a network of 30 permanent plots distributed across tropical savanna-forest boundaries in Brazil during an uncommonly hard frost. 3) Tree cover strongly...

Data from: Persistence of the effect of frugivore identity on post-dispersal seed fate: consequences for the assessment of functional redundancy

Ana Paula Lugon, Marion Boutefeu, Emilie Bovy, Fernando Z. Vaz-De-Mello, Marie-Claude Huynen, Mauro Galetti & Laurence Culot
Large frugivores play an important role as seed dispersers and their extinction may affect plant regeneration. The consequences of such extinctions depend on the likelihood of other species being functionally redundant and on how post-dispersal events are affected. We assess the functional redundancy of two seed dispersers of the Atlantic Forest, the muriqui (Brachyteles arachnoides) and the tapir (Tapirus terrestris) through the comparison of their seed dispersal quality, taking into account post-dispersal events. We compare...

Data from: Molecular responses to freshwater limitation in the mangrove tree Avicennia germinans (Acanthaceae)

Mariana Vargas Cruz, Gustavo Maruyama Mori, Dong-Ha Oh, Maheshi Dassanayake, Maria Imaculada Zucchi, Rafael Silva Oliveira & Anete Pereira De Souza
Environmental variation along the geographical space can shape populations by natural selection. In the context of global warming and changing precipitation regimes, it is crucial to understand the role of environmental heterogeneity in tropical trees adaptation, given their disproportional contribution to water and carbon biogeochemical cycles. Here, we investigated how heterogeneity in freshwater availability along tropical wetlands has influenced molecular variations of the Black Mangrove (Avicennia germinans). Fifty-seven trees were sampled in seven sites differing...

Maintaining genetic integrity with high promiscuity: Frequent hybridization with low introgression in multiple hybrid zones of Melocactus(Cactaceae)

Khan Gulzar, Evandro Marsola De Moraes, Fernando Faria Franco, Gislaine A.R. Silva, Juliana R. Bombonato, Marlon Machado, Diego P. Alonso, Paulo E.M. Ribolla & Dirk C. Albach
Hybridization and introgression between species in contact/hybrid zones provide important insight into the genetic and ecological mechanisms of speciation. Cactaceae represents the most important radiation of true succulent angiosperms in the New World. This diversification continues to date, with species experiencing few intrinsic barriers to gene flow and the frequent occurrence of natural hybridization. Here, we used RAD-Seq single-nucleotide polymorphism (SNP) data to investigate the genetic architecture of hybridization in four hybrid zones hosting Melocactus...

Rethinking megafauna

Marcos Moleón, José Sánchez-Zapata, José Donázar, Eloy Revilla, Berta Martín-López, Cayetano Gutiérrez-Cánovas, Wayne Getz, Zebensui Morales-Reyes, Ahimsa Campos-Arceiz, Larry Crowder, Mauro Galetti, Manuela González-Suárez, Fengzhi He, Pedro Jordano, Rebecca Lewison, Robin Naidoo, Norman Owen-Smith, Nuria Selva, Jens-Christian Svenning, José Tella, Christiane Zarfl, Sonja Jähnig, Matt Hayward, Søren Faurby, Nuria García … & Klement Tochner
Concern for megafauna is increasing among scientists and non-scientists. Many studies have emphasized that megafauna play prominent ecological roles and provide important ecosystem services to humanity. But, what precisely are “megafauna”? Here we critically assess the concept of megafauna and propose a goal-oriented framework for megafaunal research. First, we review definitions of megafauna and analyze associated terminology in the scientific literature. Second, we conduct a survey among ecologists and paleontologists to assess the species traits...

Spatial heterogeneity and habitat configuration overcome habitat composition influences on alpha and beta mammal diversity

André Luis Regolin, Milton Cezar Ribeiro, Felipe Martello, Geruza Leal Melo, Jonas Sponchiado, Luis Fernando De Castro Campanha, Larissa Sayuri Moreira Sugai, Thiago Sanna Freire Silva & Nilton Carlos Cáceres
The effects of habitat fragmentation on different taxa and ecosystems are subject to intense debate, and disentangling them is of utmost importance to support conservation and management strategies. We evaluated the importance of landscape composition and configuration, and spatial heterogeneity to explain α- and β-diversity of mammals across a gradient of percent woody cover and land use diversity. We expected species richness to be positively related to all predictive variables, with the strongest relationship with...

Morpho-functional evaluation of PPARG and IL7 as key molecules related with glycemic and immune alterations in type 2 Diabetes Mellitus and Periodontitis

Raquel Mantuaneli Scarel Caminaga
It has been more frequent to find patients affected by the combination of Type 2 Diabetes Mellitus (T2DM), Dyslipidemia and Periodontitis (P). There is increasing evidence in the literature in demonstrating interactions between T2DM, dyslipidemia, immune system alterations and Periodontitis. For a better understanding of such interactions, studies with animal models, mainly murine, have been valuable. However, more clinical studies with patients, as well as with murine models, are necessary to know molecules with a...

DESENVOLVIMENTO DE HIDROGÉIS NANOCOMPÓSITOS DE POLISSACARÍDEO COM ZEÓLITAS PARA APLICAÇÃO AGRONÔMICA

Fernando Putti
As mudanças dos regimes de chuvas têm ocasionado períodos de estiagem que culminam no início da época de semeadura de diversas culturas. Sendo considerado um dos momentos mais críticos em disponibilidade hídrica, eventos como este podem impactar todo o ciclo da cultura, e têm provocado redução na produção de alimentos. Dessa forma, os hidrogéis nanocompósitos de polissacarídeos vem sendo utilizado como retentor de água no solo, sendo seu uso principalmente na produção de mudas de...

INTERACTION BETWEEN EXTRACELLULAR NEUTROPHIL TRAPS (NETS) WITH HUMAN RESPIRATORY SYNCYTIAL VIRUS hRSV AND ITS ANTIVIRAL EFFECTS

Ronaldo Silva Alves Junior
Respiratory Syncytial Virus (hRSV) is the main etiologic agent of acute viral infections of the lower respiratory tract, resulting in more than 3 million very severe cases of bronchiolitis all year round. During infection, leukocytes are massively recruited to the infectious site where they secrete cytokines and other inflammatory mediators. About 70% of these cells are neutrophils which, in addition to secreting the contents of their granules, can secrete extracellular structures that form a kind...

Carcinogênese mamária em fêmeas senis induzida por bisfenol A: influência de terapias hormonais no desenvolvimento neoplásico

Thalles Ruiz
O câncer de mama é um dos quadros patológicos mais complexos nas mulheres. Neste contexto, os disruptores endócrinos (DE) são substâncias com elevado potencial carcinogênico. O bisfenol A (BPA), encontrado em plásticos e resinas, está entre os DEs mais disseminados na natureza. Estudos demonstram sua capacidade de atuar como promotor tumoral na glândula mamária (GM). Ainda, a co-exposição com outros agentes exógenos e endógenos podem contribuir com o desenvolvimento de neoplasias severas. Neste sentido, as...

Impactos das terapias hormonais na glândula mamária e próstata de fêmeas envelhecidas sob a influência do desregulador endócrino bisfenol A

Sebastião Roberto Taboga
A glândula mamária e a próstata feminina são órgãos suscetíveis à desordens histopatológicas relacionadas à alterações nos eixos endócrinos, uma vez que são órgãos hormônio-dependentes. Ambas glândulas são alvo de intensos estudos que relacionam a biologia da reprodução e a exposição à agentes que atuam como desreguladores endócrinos (DE). Dentre um dos principais DE, o bisfenol A (BPA) é reconhecido como um composto carcinogênico quando há a exposição em períodos de remodelamento. Ainda, a co-exposição...

Inoculando Azospirillum brasilense e Nitrospirillum amazonense em cana-de-açúcar: uma abordagem além da fixação biológica de nitrogênio

Mariley De Cássia Da Fonseca
A cana-de-açúcar (Saccharum spp.) é uma das principais culturas de interesse econômico do mundo, servindo como matéria-prima para a produção de etanol, açúcar e bioenergia. Os microrganismos desempenham diversos papéis no ecossistema, incluindo bactérias promotoras de crescimento de plantas (BPCPs), que podem trazer diversos benefícios ao cultivo da cana-de-açúcar. Avaliar o efeito dessas bactérias em sua fisiologia, e os benefícios que podem trazer a esta cultura energética, podem ser alternativas para melhorar o uso...

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