75 Works

Data from: Spatiotemporal dynamics of the ant community in a dry forest differ by vertical strata but not by successional stage

Frederico Neves, Reuber Antoniazzi, Flávio Camarota, Fábio Pacelhe & Scott Powell
Ants are diverse and ecologically important organisms in tropical forests, where their spatiotemporal distribution can be highly complex. This complexity arises mainly from marked differences in microclimatic conditions and resource availability through space and time that is even more evident in highly seasonal environments, such as tropical dry forests. However, it is unclear how seasonality interacts with other factors that might shape temporal variation of ant composition (β-diversity), like vertical strata and habitat disturbance. Our...

Climate and plant structure determine the spatiotemporal butterfly distribution in a tropical mountain

Marina Beirão, Frederico S Neves & G Wilson Fernandes
Mountains are among the most powerful natural gradients for testing ecological and evolutionary responses of biota to environmental influences because differences in climate and plant structure occur over short spatial scales. We describe the spatiotemporal distribution patterns and drives of fruit-feeding butterfly diversity on the mountaineous region of Serra do Cipó, Minas Gerais, Brazil. Seven elevations from 822 to 1388 m were selected for evaluating the effects of abiotic factors and vegetation characteristics on butterfly...

Weather effects on nestling survival of great tits vary according to the developmental stage

Fernando Marques-Santos & Niels J. Dingemanse
Organisms change breeding investments as a function of the environment, thereby maximizing reproductive success. Climate change studies of avian life-history have long focused on plasticity of laying dates and clutch sizes in response to weather conditions prior to clutch initiation. By contrast, effects of unpredictable weather events occurring after initial reproductive decisions are made have largely been ignored, despite becoming increasingly important with ongoing climate change. We studied the detrimental effects of fluctuations in temperature...

Sex affects immunolabeling for histone 3 K27me3 in the trophectoderm of the bovine blastocyst but not labeling for histone 3 K18ac

Peter Hansen, Luciano Carvalheira, Paula Tribulo & Alan Borges
The mammalian embryo displays sexual dimorphism in the preimplantation period. Moreover, competence of the embryo to develop is dependent on the sire from which the embryo is derived and can be modified by embryokines produced by the endometrium such as colony stimulating factor 2 (CSF2). The preimplantation period is characterized by large changes in epigenetic modifications of DNA and histones. It is possible, therefore, that effects of sex, sire, and embryo regulatory molecules are mediated...

Evaluating the boundaries of marine biogeographic regions of the Southwestern Atlantic using halacarid mites (Halacaridae), meiobenthic organisms with a low dispersal potential

Almir Pepato, Pavel Klimov & Teofânia Vidigal
Aim We evaluated traditional biogeographic boundaries of coastal marine regions in SW Atlantic using DNA sequence data from common, rocky-shore inhabiting, marine mites of the genera Agauopsis and Rhombognathus, family Halacaridae. Methods We investigated geographic population genetic structure using CO1 gene sequences, estimated divergence times using a multigene dataset and absolute time-calibrated molecular clock analyses, and performed environmental niche modeling (ENM) of common marine mite species. Results Agauopsis legionium has a shallow history (2.01 Ma)...

Variation in community structure of gall-inducing insects associated with a tropical plant supports the hypothesis of competition in stressful habitats

Letícia Fernanda Ramos, Ricardo Ribeiro De Castro Solar, Henrique Santos & Marcilio Fagundes
Environmental factors act as drivers of species coexistence or competition. Mesic environments favor the action of parasites and predators on gall communities, while the factors that determine the structure of gall communities in xeric environments remain unknown. We evaluated the structure of gall communities along an environmental gradient defined by intrinsic plant characteristics, soil fertility and aridity, and investigated the role of competition as a structuring force of gall communities in xeric environments. We created...

Data from: Is environmental legislation conserving tropical stream faunas? a large-scale assessment of local, riparian and catchment-scale influences on Amazonian stream fish

Cecília G. Leal, Jos Barlow, Toby Gardner, Robert M. Hughes, Rafael P. Leitão, Ralph Mac Nally, Philip R. Kaufmann, Silvio F. B. Ferraz, Jansen Zuanon, Felipe R. De Paula, Joice Ferreira, James R. Thomson, Gareth D. Lennox, Eurizângela P. Dary, Cristhiana P. Röpke, Paulo S. Pompeu & Toby A. Gardner
1.Agricultural expansion and intensification are major threats to tropical biodiversity. In addition to the direct removal of native vegetation, agricultural expansion often elicits other human-induced disturbances, many of which are poorly addressed by existing environmental legislation and conservation programmes. This is particularly true for tropical freshwater systems, where there is considerable uncertainty about whether a legislative focus on protecting riparian vegetation is sufficient to conserve stream fauna. 2.To assess the extent to which stream fish...

Data from: Strong spatial structure, Pliocene diversification and cryptic diversity in the Neotropical dry forest spider Sicarius cariri

Ivan L. F. Magalhaes, Ubirajara Oliveira, Fabrício R. Santos, Teofania H. D. A. Vidigal, Antonio D. Brescovit & Adalberto J. Santos
The Brazilian Caatinga is part of the seasonally dry tropical forests, a vegetation type disjunctly distributed throughout the Neotropics. It has been suggested that during Pleistocene glacial periods, these dry forests had a continuous distribution, so that these climatic shifts may have acted as important driving forces of the Caatinga biota diversification. To address how these events affected the distribution of a dry forest species, we chose Sicarius cariri, a spider endemic to the Caatinga,...

Data from: Environmental constraints on the compositional and phylogenetic beta-diversity of tropical forest snake assemblages

Mario R. Moura, Henrique C. Costa, Antonio J. S. Argôlo & Walter Jetz
The ongoing biodiversity crisis increases the importance and urgency of studies addressing the role of environmental variation on the composition and evolutionary history of species assemblages, but especially the tropics and ectotherms remain understudied. In regions with rainy summers, coexistence of ectothermic species may be determined by the partitioning of the climatic niche, since ectotherms can rely on water availability and thermoregulatory behaviour to buffer constraints along their climatic niche. Conversely, ectotherms facing dry summers...

Data from: Factors influencing ocelot occupancy in Brazilian Atlantic Forest reserves

Rodrigo Lima Massara, Ana Maria De Oliveira Paschoal, Larissa Lynn Bailey, , André Hirsch, Adriano Garcia Chiarello & Paul F. Doherty
Over 80% of Atlantic Forest remnants are <50 ha and protected areas are embedded in a matrix dominated by human activities, undermining the long-term persistence of carnivores. The ocelot (Leopardus pardalis) is an opportunistic species, but little is known about its tolerance to habitat alterations and the influence of other species on its occupancy in Atlantic Forest remnants. We used camera traps to assess ocelot occupancy in protected areas of Atlantic Forest in southeastern Brazil....

Data from: Hypothesised diprotomeric enzyme complex supported by stochastic modelling of Palytoxin-induced Na/K pump channels

Gabriel D. Vilallonga, Antônio-Carlos G. De Almeida, Keelson T. Ribeiro, Sérgio V.A. Campos, Antônio M. Rodrigues & Sergio V. A. Campos
The sodium-potassium pump (Na+/K+ pump) is crucial for cell physiology. Despite great advances in the understanding of this ionic pumping system, its mechanism is not completely understood. We propose the use of the Statistical Model Checker to investigate palytoxin-induced Na+/K+ pump channels. We modelled a system of reactions representing transitions between the conformational substates of the channel with parameters, concentrations of the substates, and reaction rates extracted from simulations reported in the literature, based on...

Data from: Phylogenetic systematics of subtribe Spiranthinae (Orchidaceae: Orchidoideae: Cranichideae) based on nuclear and plastid DNA sequences of a nearly complete generic sample

Gerardo A. Salazar, Joao A.N. Batista, Lidia I. Cabrera, Cassio Van Den Berg, W. Mark Whitten, Eric C. Smidt, Cristiano R. Buzatto, Rodrigo B. Singer, Gunter Gerlach, Rolando Jimenez-Machorro, Jose A. Radins, Irma S. Insaurralde, Leonardo R.S. Guimaraes, Fabio De Barros, Francisco Tobar, Jose L. Linares, Ernesto Mujica, Robert L. Dressler, Mario A. Blanco, Eric Hagsater & Mark W. Chase
Subtribe Spiranthinae is the most species-rich lineage of terrestrial Neotropical orchids, encompassing > 500 species and 40 genera. We conducted maximum parsimony and maximum likelihood phylogenetic analyses of DNA sequence data of plastid matK-trnK and trnL-trnF and nuclear ribosomal ITS sequences for 36 genera and 182 species of Spiranthinae plus appropriate outgroups. The results strongly support monophyly of Spiranthinae (minus Discyphus, Discyphinae and Galeottiella, Galeottiellinae) and five major lineages, namely monospecific Cotylolabium (sister to the...

Data from: Validity of the Diplostomoidea and Diplostomida (Digenea, Platyhelminthes) upheld in phylogenomic analysis

Sean A. Locke, Alex Van Dam, Monica Caffara, Hudson Alves Pinto, Danimar Lopez-Hernandez & Christopher A. Blanar
Higher systematics within the Digenea, Carus 1863 have been relatively stable since a phylogenetic analysis of partial nuclear ribosomal markers (rDNA) led to the erection of the Diplostomida Olson, Cribb, Tkach, Bray, and Littlewood, 2003. However, recent mitochondrial (mt) genome phylogenies suggest this order might be paraphyletic. These analyses show members of two diplostomidan superfamilies are more closely related to the Plagiorchiida La Rue, 1957 than to other members of the Diplostomida. In one of...

Data from: Patterns of taxonomic and functional diversity of termites along a tropical elevational gradient

Cássio Alencar Nunes, André Vieira Quintino, Reginaldo Constantino, Daniel Negreiros, Ronaldo Reis-Júnior & G. Wilson Fernandes
Patterns of termite richness along elevation gradients may be related to different responses by termite functional groups to changes in environmental conditions. We investigated the distribution of termite species richness along an elevational gradient of cerrado and rupestrian grasslands in the Espinhaço Mountain Range, in Brazil. Fifty termite species were recorded, with the family Termitidae being dominant; 16 species are endemic to open areas of cerrado and 1 species, Cortaritermes rizzinii, is endemic and restricted...

Data from: Evolutionary diversity in tropical tree communities peaks at intermediate precipitation

Danilo M. Neves, Kyle G. Dexter, Timothy R. Baker, Fernanda Coelho De Souza, Ary T. Oliveira-Filho, Luciano P. Queiroz, Haroldo C. Lima, Marcelo F. Simon, Gwilym P. Lewis, Ricardo A. Segovia, Luzmila Arroyo, Carlos Reynel, José L. Marcelo-Peña, Isau Huamantupa-Chuquimaco, Daniel Villarroel, G. Alexander Parada, Aniceto Daza, Reynaldo Linares-Palomino, Leandro V. Ferreira, Rafael P. Salomão, Geovane S. Siqueira, Marcelo T. Nascimento, Claudio N. Fraga & R. Toby Pennington
Global patterns of species and evolutionary diversity in plants are primarily determined by a temperature gradient, but precipitation gradients may be more important within the tropics, where plant species richness is positively associated with the amount of rainfall. The impact of precipitation on the distribution of evolutionary diversity, however, is largely unexplored. Here we detail how evolutionary diversity varies along precipitation gradients by bringing together a comprehensive database on the composition of angiosperm tree communities...

Data from: Early plant development depends on embryo damage location: the role of seed size in partial seed predation

Ramón Perea García-Calvo, Geraldo Fernandes & Rodolfo Dirzo
Data on 1) Observed weevil-infested acorns in the field; 2) Germination rates and times, and seedling emergence of control and embryo-damaged acorns; 3) Seedling performance and physiology of seedlings

Data from: A spectacular new species of Habenaria (Orchidaceae) from southern Brazilian Amazon

Joao Aguiar Nogueira Batista, Mathias Engels & Thaynara Salgado
A new Habenaria species from the state of Mato Grosso is described and illustrated. Habenaria gracilisegmenta was discovered in campinarana sub-forest, in northern Mato Grosso state, on the southern edge of the Brazilian Amazon. The species is distinguished by its slender habit, few, delicate flowers, and very long, thin lateral segments of the petals and lip, and its morphological affinity with other Neotropical species is unclear. A molecular phylogenetic analysis revealed that the new species...

Data from: Evolution and epidemic spread of SARS-CoV-2 in Brazil

Darlan S. Candido, Ingra M. Claro, Jaqueline G. De Jesus, William M. Souza, Filipe R. R. Moreira, Simon Dellicour, Thomas A. Mellan, Louis Du Plessis, Rafael H. M. Pereira, Flavia C. S. Sales, Erika R. Manuli, Julien Thézé, Luiz Almeida, Mariane T. Menezes, Carolina M. Voloch, Marcilio J. Fumagalli, Thaís M. Coletti, Camila A. M. Da Silva, Mariana S. Ramundo, Mariene R. Amorim, Henrique H. Hoeltgebaum, Swapnil Mishra, Mandev S. Gill, Luiz M. Carvalho, Lewis F. Buss … & Nuno R. Faria
Brazil currently has one of the fastest growing SARS-CoV-2 epidemics in the world. Owing to limited available data, assessments of the impact of non-pharmaceutical interventions (NPIs) on virus spread remain challenging. Using a mobility-driven transmission model, we show that NPIs reduced the reproduction number from >3 to 1–1.6 in São Paulo and Rio de Janeiro. Sequencing of 427 new genomes and analysis of a geographically representative genomic dataset identified >100 international virus introductions in Brazil....

Um olhar sobre as aparições de Fidel Castro e Che Guevara em O fundo do ar é vermelho, de Chris Marker

Julia Fagioli
O que propomos neste artigo é uma análise de trechos d’O fundo do ar é vermelho, particularmente aqueles em que assumem o protagonismo Fidel Castro e Che Guevara, revelando sua importância no contexto dos anos 1960 e 1970. No filme, que tem como marco central os acontecimentos de 1968, Chris Marker confere grande importância ao contexto latino-americano, especialmente no que diz respeito às relações entre a guerrilha e os movimentos anti-imperialistas ao redor do mundo.

O documentário no sistema socioeducativo: ensino como co-criação de saber

Júlio Figueroa & Luciana Oliveira

The challenges to plan and develop pedagogical practices involving digital written culture in childhood education

Mônica Daisy Vieira Araújo, Isabel Cristina Alves da Silva FRADE & Julianna Silva Glória
Nowadays children are part of the digital culture (Cassany, 2002), using its supports and involving themselves in different uses of digital written culture (Chartier, 2011, 2016). Are teachers considering these uses in preschools? How can we create teaching proposals that attend the learning conditions of young children? How do children deal with the devices, languages, and the particular uses of digital written culture? This text aims to reflect on the processes to incorporate digital technologies...

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...

Anatomical partitioning has little influence in topologies from Bayesian phylogenetic analyses of morphological data

Daniel Casali, Felipe Freitas & Fernando Perini
Morphological data is a fundamental source of evidence to reconstruct the Tree of Life, and Bayesian phylogenetic methods are increasingly being used for this task, along with, or instead of, traditional parsimony approaches. Bayesian phylogenetic analyses require the use of proper evolutionary models and their performance have been intensively studied in the past few years, with significant improvements to our knowledge regarding their performance. Notwithstanding, it was only recently that partitioned models for morphology received...

Mimosa catherinensis SNP data sets

Alison Nazareno & Thais Martins
To inform management strategies for conservation of Mimosa catharinensis – a narrow endemic, critically endangered plant species – we identified 1,497 unlinked SNP markers derived from a reduced representation sequencing method (i.e., ddRADseq). This set of molecular markers was employed to assess intrapopulation genetic parameters and the demographic history of one extremely small population of M. catharinensis located in the Brazilian Atlantic Forest. We observed a moderate level of genetic diversity for M. catharinensis. Interestingly,...

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