40 Works

Data from: Do space-for-time assessments underestimate the impacts of logging on tropical biodiversity? An Amazonian case study using dung beetles

Filipe França, Júlio Louzada, Vanesca Korasaki, Hannah Griffiths, Juliana M. Silveira & Jos Barlow
Human alteration of the global environment is leading to a pervasive loss of biodiversity. Most studies evaluating human impacts on biodiversity occur after the disturbance has taken place using spatially distinct sites to determine the undisturbed reference condition. This approach is known as a space-for-time (SFT) substitution. However, SFT substitution could be underestimating biodiversity loss if spatial controls fail to provide adequate inferences about pre-disturbance conditions. We compare the SFT substitution with a before–after control–impact...

Data from: Niche conservatism and the invasive potential of the wild boar

Lilian Patricia Sales, Bruno R. Ribeiro, Matt Warrington Hayward, Adriano P. Paglia, Marcelo Passamani & Rafael Loyola
1.Niche conservatism, i.e. the retention of a species’ fundamental niche through evolutionary time, is cornerstone for biological invasion assessments. The fact that species tend to maintain their original climate niche allows predictive maps of invasion risk to anticipate potential invadable areas. Unraveling the mechanisms driving niche shifts can shed light on the management of invasive species. 2.Here, we assessed niche shifts in one of the world's worst invasive species: the wild boar Sus scrofa. We...

Data from: Selection of early soybean inbred lines using multiple indices

Gabriel De Siqueira Gesteira, Adriano Teodoro Bruzi, Roberto Kazuhiko Zito, Vanoli Fronza & Neylson Eustáquio Arantes
Soybean [Glycine max (L.) Merr.] has been studied and enhanced for most of its economically important traits. Previous research has studied the association among them and the effect of the genotype × environment interaction; however, less is known about their correlation considering absolute maturity, as well as the use of multiple selection indices to study the genotype × environment interaction and select superior cultivars. Regarding this, the aim of the present study was to identify...

Data from: Genetic evaluation of migratory fish: implications for conservation and stocking programs

Juliana Pimentel, Sandra Ludwig, Leonardo Resende, Pedro Brandão-Dias, Adriana Pereira, Nazaré Abreu, Izinara Rosse, Ana Paula Martins, Susanne Facchin, João Lopes, Gilmar Santos, Carlos Alves & Evanguedes Kalapothakis
Fish stocking programs have been implemented to mitigate the blockage of original riverbeds by the construction of hydropower dams, which affects the natural migration of fish populations. However, this method raises concerns regarding the genetic rescue of the original populations of migratory fish species. We present the first study to investigate the genetic diversity, population structure, and gene flow (migration) of the Neotropical migratory fish Prochilodus costatus in the Três Marias dam in São Francisco...

Synergistic impacts of co-occurring invasive grasses cause persistent effects in the soil-plant system after selective removal

Rafael Zenni, Wanderson Da Cunha, Carolina Musso, Jocemara De Souza, Gabriela Nardoto & Heloisa Miranda
1. Human influence on the environment is so extensive that virtually all ecosystems on the planet are now affected by biological invasions. And, often, ecosystems are invaded by multiple co-occurring non-native species. Hence, it is important to understand the impacts these invasions are producing on biodiversity and ecosystem processes. 2. Here, we present results of a two-year long field experiment where we tested the effects of co-occurring invasive C4 African grasses in a Cerrado area...

Statistical significance, selection accuracy, and experimental precision in plant breeding

Marcos Deon Vilela de Resende & Rodrigo Silva Alves
Abstract Genetic selection efficiency is measured by accuracy. Model selection relies on hypothesis testing with effectiveness given by statistical significance (p-value). Estimates of selection accuracy are based on variance parameters and precision. Model selection considers the amount of genetic variability and significance of effects. Questions arise as to which one to use: accuracy or p-value? We show there is a link between the two and both may be used. We derive equations for accuracy in...

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: Stimulation of the salicylic acid pathway aboveground recruits entomopathogenic nematodes belowground

Camila Cramer Filgueiras, Denis S. Willett, Alcides Moino, Martin Pareja, Fahiem El Borai, Donald W. Dickson, Lukasz L. Stelinski, Larry W. Duncan & Alcides Moino Junior
Plant defense pathways play a critical role in mediating tritrophic interactions between plants, herbivores, and natural enemies. While the impact of plant defense pathway stimulation on natural enemies has been extensively explored aboveground, belowground ramifications of plant defense pathway stimulation are equally important in regulating subterranean pests and still require more attention. Here we investigate the effect of aboveground stimulation of the salicylic acid pathway through foliar application of the elicitor methyl salicylate on belowground...

Data from: Tropical forests structure and diversity: a comparison of methodological choices

Cléber Rodrigo Souza, Fernanda Coelho De Souza, Vinícius Andrade Maia, Natália Aguiar-Campos, Polyanne Aparecida Coelho, Camila Laís Farrapo, Alisson Borges Miranda Santos, Felipe De Carvalho Araújo, Fernanda Moreira Gianasi, Gabriela Gomes Pires Paula, Jean Daniel Morel, Nathalle Cristine Alencar Fagundes, Paulo Oswaldo Garcia, Wilder Bento Silva, Marco Aurélio Leite Fontes & Rubens Manoel Santos
1. Large-scale data compilation is increasing steadily in tropical forest research, but the lack of standardized methods for data collection limits drawing inference from large datasets and cross-biome analyses. Different inclusion methods and minimum tree diameter threshold are among these varying factors. To tackle this issue, we evaluated how different approaches for tree sampling affects our understanding of diversity and functioning in different tropical vegetation types. 2. We used a unique dataset of 44 inventory...

Data from: A model of urban scaling laws based on distance dependent interactions

Fabiano L. Ribeiro, João Miranda, Fernando F. Ferreira & Camilo Rodrigues Neto
Socio-economic related properties of a city grow faster than a linear relationship with the population, in a log–log plot, the so-called superlinear scaling. Conversely, the larger a city, the more efficient it is in the use of its infrastructure, leading to a sublinear scaling on these variables. In this work, we addressed a simple explanation for those scaling laws in cities based on the interaction range between the citizens and on the fractal properties of...

Data from: Improving accuracies of genomic predictions for drought tolerance in maize by joint modeling of additive and dominance effects in multi-environment trials

Kaio Olímpio Das Graças Dias, Salvador Alejandro Gezan, Claudia Teixeira Guimarães, Alireza Nazarian, Luciano Da Costa E Silva, Sidney Netto Parentoni, Paulo Evaristo De Oliveira Guimarães, Carina De Oliveira Anoni, José Maria Villela Pádua, Marcos De Oliveira Pinto, Roberto Willians Noda, Carlos Alexandre Gomes Ribeiro, Jurandir Vieira De Magalhães, Antonio Augusto Franco Garcia, João Cândido De Souza, Lauro José Moreira Guimarães & Maria Marta Pastina
Breeding for drought tolerance is a challenging task that requires costly, extensive and precise phenotyping. Genomic selection (GS) can be used to maximize selection efficiency and the genetic gains in maize (Zea mays L.) breeding programs for drought tolerance. Here we evaluated the accuracy of genomic selection of additive (A) against additive+dominance (AD) models to predict the performance of untested maize single-cross hybrids for drought tolerance in multi-environment trials. Phenotypic data of five drought-tolerance traits...

Data from: Habitat attributes similarities reduce impacts of land-use conversion on seed removal

Ananza M. Rabello, Catherine L. Parr, Antônio C.M. Queiroz, Danielle L. Braga, Graziele S. Santiago & Carla R. Ribas
Changes in land use strongly influence habitat attributes (e.g., herbaceous ground cover and tree richness) and can consequently affect ecological functions. Most studies have focused on the response of these ecological functions to land-use changes within only a single vegetation type. These studies have often focused solely on agricultural conversion of forests, making it nearly impossible to draw general conclusions across other vegetation types or with other land use changes (e.g., afforestation). We examined the...

Screening coffee genotypes for brown eye spot resistance in Brazil

Juliana Ramos, Mario Lucio Rezende, Deila Botelho, Renata Pereira, Tharyn Reichel, André Balieiro, Gustavo Botega & Juliana Rezende
Several researchers have attempted to develop coffee plants that are resistant to brown eye spot (BES); however, no coffee cultivars are resistant to the disease. In the present study, a blend of strains from Cercospora coffeicola was inoculated into 19 Brazilian commercial cultivars and 41 accessions from the Germplasm Collection of Minas Gerais to evaluate the genetic resistance ability within the population and select superior genotypes for the breeding program. After predicting the genotypic values...

Data from: The value of trophic interactions for ecosystem function: dung beetle communities influence seed burial and seedling recruitment in tropical forests

Hannah M. Griffiths, Richard D. Bardgett, Julio Louzada & Jos Barlow
Anthropogenic activities are causing species extinctions, raising concerns about the consequences of changing biological communities for ecosystem functioning. To address this, we investigated how dung beetle communities influence seed burial and seedling recruitment in the Brazilian Amazon. First, we conducted a burial and retrieval experiment using seed mimics. We found that dung beetle biomass had a stronger positive effect on the burial of large than small beads, suggesting that anthropogenic reductions in large-bodied beetles will...

Data from: Inaccuracy of venous point-of-care glucose measurements in critically ill patients: a cross-sectional study

Adriano Jose Pereira, Thiago Domingos Corrêa, Francisca Pereira De Almeida, Rodrigo Octavio Deiberato, Michelle Dos Santos Lobato, Nelson Akamine, Eliézer Silva, Alexandre Biasi Cavalcanti & Rodrigo Octávio Deliberato
Introduction: Current guidelines and consensus recommend arterial and venous samples as equally acceptable for blood glucose assessment in point-of-care devices, but there is limited evidence to support this recommendation. We evaluated the accuracy of two devices for bedside point-of-care blood glucose measurements using arterial, fingerstick and catheter venous blood samples in ICU patients, and assessed which factors could impair their accuracy. Methods: 145 patients from a 41-bed adult mixed-ICU, in a tertiary care hospital were...

Data from: Mesoclosures – increasing realism in mesocosm studies of ecosystem functioning

Saija Lähteenmäki, Eleanor M. Slade, Bess Hardwick, Gustavo Schiffler, Júlio Louzada, Jos Barlow & Tomas Roslin
1. Experimental studies linking community composition to functioning are typically confined to small and closed micro- or mesocosms. Such restricted conditions may affect both species’ biology and their environment. Yet, targeting simple features in the behaviour of species may circumvent these constraints. Focusing on ecological functions provided by dung beetles, we test whether large, open-top cages – MESOCLOSURES – will intercept the flight trajectories of beetles, thereby allowing manipulation of local community composition. 2. MESOCLOSURES...

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: Interactions among morphotype, nutrition, and temperature impact fitness of an invasive fly.

Dalila Rendon, Vaughn Walton, Gabriella Tait, Jessica Buser, Ivana Lemos Souza, Anna Wallingford, Greg Loeb & Jana Lee
Invasive animals depend on finding a balanced nutritional intake to colonize, survive, and reproduce in new environments. This can be especially challenging during situations of fluctuating cold temperatures and food scarcity, but phenotypic plasticity may offer an adaptive advantage during these periods. We examined how lifespan, fecundity, pre-oviposition periods, and body nutrient contents were affected by dietary protein and carbohydrate (P:C) ratios at variable low temperatures in two morphs (winter morphs WM and summer morphs...

Data from: Evolutionary constraints on tree size and aboveground biomass in tropical dry forests

Natalia De Aguiar-Campos, Fernanda Coelho De Souza, Vinícius Maia, Vanessa Rezende, Cléber Souza, Gabriela Paula, Paola Santos, Gisele Menino, Wilder Silva & Rubens Santos
1. The extent (or lack) of phylogenetic signal for key ecological traits reveals the role of evolutionary processes on present-day ecosystem function and hints on future ecological trends under climate change scenarios. This approach has been applied to South American tropical moist forests, but not to the highly threatened seasonally dry tropical forests (SDTF), despite acknowledgement of their unique evolutionary history. To fill this knowledge gap, we investigated the legacy of evolutionary processes on vital...

Data from: Canals as invasion pathways in tropical dry forest and the need for monitoring and management

Matheus S. Asth, Renato G. Rodrigues & Rafael D. Zenni
Linear infrastructure intrusions are common around the world to meet the needs of a growing and interconnected human population. The implementation of linear infrastructures involves numerous forms and mechanisms of land-use transformation that can facilitate and serve as pathways to the spread of invasive non-native species. However, the type and intensity of land transformations change over time and this can affect the frequency and intensity in which linear infrastructures route the spread of invasive species....

Statistical significance, selection accuracy, and experimental precision in plant breeding

Marcos Deon Vilela de Resende & Rodrigo Silva Alves
Abstract Genetic selection efficiency is measured by accuracy. Model selection relies on hypothesis testing with effectiveness given by statistical significance (p-value). Estimates of selection accuracy are based on variance parameters and precision. Model selection considers the amount of genetic variability and significance of effects. Questions arise as to which one to use: accuracy or p-value? We show there is a link between the two and both may be used. We derive equations for accuracy in...

Genotypic diversity and genetic parameters of 'Tahiti' acid lime using different rootstocks

Renan Garcia Malikouski, Marco Antônio Peixoto, Filipe Manoel Ferreira, Andréia Lopes de Morais, Rodrigo Silva Alves, Moises Zucoloto, Dimmy Herllen Silveira Gomes Barbosa & Leonardo Lopes Bhering
Abstract The objective of this work was to estimate the genetic parameters and to evaluate the genotypic diversity of 12 'Tahiti' acid lime (Citrus latifolia) genotypes grafted onto two rootstocks. The experiment was carried out from July 2017 to January 2019, in the municipality of São Mateus, in the state of Espírito Santo, Brazil. Vegetative (stem diameter, canopy projection diameter, and plant height), productive (yield and fruit number), and fruit quality (fruit diameter, soluble solids...

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...

Credibilidade e Confiabilidade das Redes Sociais nas Eleições

Rodrigo Gandia, Eduardo Carvalho, Cassiano Ferreira, Guilherme Pinto & Joel Sugano

Data from: Tough fishing and severe seasonal food insecurity in Amazonian flooded forests

Daniel Tregidgo, Jos Barlow, Paulo Pompeu & Luke Parry
Billions of people rely on harvesting wildlife for food, and must contend with catch rates that vary in space (e.g. overharvesting near communities) and time (e.g. seasonal migrations). Yet, research has overlooked potential linkages between reduced wildlife catch rates (catch-per-unit-effort) and food security. Moreover, assumptions that people living in biologically rich environments are food secure lack empirical testing. This is problematic given that food security rests on having stable access to sufficient food, rather than...

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