48 Works

From the leaf to the community: distinct dimensions of phytochemical diversity shape plant-insect interactions within and among individual plants

Leandro Cosmo, Lydia Yamaguchi, Gabriel Felix, Massuo Kato, Rodrigo Cogni & Martin Pareja
Plant secondary chemistry is known to be an important driver of plant-insect community structure across ecological scales. Recently, the concept of phytochemical diversity has been introduced to help describe variation in plant secondary chemistry and explain how this variation affects community structure. Previous studies show that phytochemical diversity among individuals and species results in phytochemical mosaics, known as the phytochemical landscape. However, plant traits can vary at finer scales, such as within individuals, and even...

Data for: Dorsal premammillary projection to periaqueductal gray controls escape vigor from innate and conditioned threats

Peter Schuette, Weisheng Wang, Mimi La-Vu, Brooke Tobias, Marta Ceko, Philip Kragel, Fernando Reis, Shiyu Ji, Megha Sehgal, Sandra Maesta-Pereira, Meghmik Chakerian, Alcino Silva, Newton Canteras, Tor Wager, Jonathan Kao & Avishek Adhikari
Escape from threats has paramount importance for survival. However, it is unknown if a single circuit controls escape from innate and conditioned threats. The hypothalamic dorsal premammillary nucleus (PMd) may control escape, as it is strongly activated by escape-inducing threats and projects to the region most implicated in escape, the dorsolateral periaqueductal gray (dlPAG). We show that in mice cholecystokinin (cck)-expressing PMd cells are activated during escape, but not other defensive behaviors. PMd-cck ensemble activity...

Evolutionary drivers of sexual signal variation in Amazon slender anoles

Ivan Prates, Annelise D'Angiolella, Miguel Rodrigues, Paulo Melo-Sampaio, Kevin De Queiroz & Rayna Bell
Phenotypic variation among populations, as seen in the signaling traits of many species, provides an opportunity to test whether similar factors generate repeated phenotypic patterns in different parts of a species’ range. We investigated whether genetic divergence, abiotic gradients, and sympatry with closely related species explain variation in the dewlap colors of Amazon Slender Anoles, Anolis fuscoauratus. To this aim, we characterized dewlap diversity in the field with respect to population genetic structure and evolutionary...

Data from: Re-evaluation of the law of constant extinction for ruminants at different taxonomical scale

Matheus Januario & Tiago Quental
The “law of constant extinction,” proposed by Van Valen, states that long and short-lived taxa have equal chances of going extinct. This pattern of age-independent extinction was originally inferred using the fossil record of several different taxa and relied on survivorship curves built from the literal reading of the fossil record. Van Valen’s seminal work was mostly done at higher taxonomic levels, hence its prevalence at the species level could not be directly inferred. The...

LT-Brazil: A database of leaf traits across biomes and vegetation types in Brazil

Eduardo Mariano, Taciana Gomes, Silvia Lins, Adibe Abdalla-Filho, Amin Soltangheisi, Maria Araújo, Rodrigo Almeida, Fernanda Augusto, Luiza Canisares, Siglea Chaves, Cristiane Costa, Thaís Diniz-Reis, Leonardo Galera, Melissa Martinez, Maristela Morais, Elen Perez, Lucas Reis, Carla Simon, Silvia Mardegan, Tomas Domingues, Raquel Miatto, Rafael Oliveira, Carla Reis, Gabriela Nardoto, Jens Kattge … & Luiz Martinelli
Motivation: Leaf traits represent an important component of plant functional strategies, and those related to carbon fixation and nutrient acquisition form the leaf economics spectrum. However, observations of functional leaf traits are underrepresented in tropical regions in comparison with those in temperate areas. Brazil, a country with continental scale and vast biodiversity is a timely example, where many biomes are impacted by human activities and climate change. However, leaf traits relevant to understand vegetation responses...

Function of a multimodal signal: a multiple hypothesis test using a robot frog

Vinícius Matheus Caldart, Maurício Beux Dos Santos & Glauco Machado
1. Multimodal communication may evolve because different signals may convey information about the signaller (content-based selection), increase efficacy of signal processing or transmission through the environment (efficacy-based selection), or modify the production of a signal or the receiver’s response to it (inter-signal interaction selection). 2. To understand the function of a multimodal signal (aggressive calls + toe flags) emitted by males of the frog Crossodactylus schmidti during territorial contests, we tested two hypotheses related to...

A holocenic and dynamic hybrid zone between two cactophilic Drosophila species in a coastal lowland plain of the Brazilian Atlantic Forest

Maura Helena Manfrin
Hybridization and introgression are processes that contribute to shaping biological diversity. The factors promoting the formation of these processes are multiples but poorly explored in a biogeographical and ecological context. In the southeast coastal plain of the Brazilian Atlantic Forest, a hybrid zone was described between two closely related cactophilic species, Drosophila antonietae and D. serido. Here, we revisited and analyzed specimens from this hybrid zone to evaluate its temporal and spatial dynamic. We examined...

A specific IL6 polymorphic genotype modulates the risk of T. cruzi parasitemia while IL18, IL17A and IL1B variant profiles and HIV infection protect against cardiomyopathy in Chagas disease

Elieser Watanabe, Alexandra Santos, Daiane Ferreira, Jamile Oliveira, Erika Nakanishi, Claudio Oliveira, Edimar Bocchi, Cristina Novaes, Fatima Cruz, Noemia Carvalho, Paula Sato, Edite Yamashiro, Alessandra Pontillo, Vera Lucia Freitas, Luiz Fernando Onuchic & Maria Aparecida Shikanai Yasuda
Background: Chagas disease caused by Trypanosoma cruzi (T. cruzi) affects approximately six million individuals worldwide. Clinical manifestations are expected to occur due to the parasite persistence and host immune response. Herein we investigated potential associations between IL1B, IL6, IL17A or IL18 polymorphism profiles and cardiomyopathy or T. cruzi parasitemia, as well as the impact of HIV infection on cardiopathy. Methods: 206 patients and 90 control individuals were analyzed. IL1B rs1143627 T>C, IL6 rs1800795 C>G, IL17A...

Negative impacts of dominance on bee communities: Does the influence of invasive honey bees differ from native bees?

Lucas Alejandro Garibaldi, Lucas Garibaldi, Néstor Pérez-Méndez, Guaraci Cordeiro, Alice Hughes, Michael Orr, Isabel Alves Dos Santos, Breno Freitas, Favízia Freitas De Oliveira, Gretchen Lebuhn, Ignasi Bartomeus, Marcelo Aizen, Patricia Andrade, Betina Blochtein, Danilo Boscolo, Patricia Drumond, Maria Gaglianone, Barbara Gemmill-Herren, Rosana Halinski, Cristiane Krug, Marcia Maues, Lucia Piedade Kiill, Mardiore Pinheiro, Carmen Pires & Blandina Felipe Viana
Invasive species can reach high abundances and dominate native environments. One of the most impressive examples of ecological invasions is the spread of the African sub-species of the honey bee throughout the Americas, starting from its introduction in a single locality in Brazil. The invasive honey bee is expected to more negatively impact bee community abundance and diversity than native dominant species, but this has not been tested previously. We developed a comprehensive and systematic...

Data from: Isotopic niches of tropical birds reduced by anthropogenic impacts: A 100-year perspective

Ana B. Navarro, Marcelo Magioli, Juliano A. Bogoni, Luís F. Silveira, Marcelo Z. Moreira, Eduardo R. Alexandrino, Daniela T. A. Luz, Wesley R. Silva, Marco A. Pizo, Vanessa C. Oliveira & Katia M. P. M. B. Ferraz
The intensification of land use changes in tropical forests during the 20th century, mainly caused by deforestation for agricultural uses, had an overwhelming influence on bird assemblages. However, how these historical anthropogenic changes have impacted the habitat use and diet of tropical birds is poorly known. Stable isotope analysis (δ13C and δ15N) can be useful in this regard since it provides information not only on the habitat and food resource use but also insights on...

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...

Data from: Accelerated diversification explains the exceptional species richness of tropical characoid fishes

Bruno Melo, Brian Sidlauskas, Thomas Near, Fabio Roxo, Ava Ghezelayagh, Luz Ochoa, Melanie Stiassny, Jairo Arroyave, Jonathan Chang, Brant Faircloth, Daniel MacGuigan, Richard Harrington, Ricardo Benine, Michael Burns, Kendra Hoekzema, Natalia Sanches, Javier Maldonado-Ocampo, Ricardo Castro, Fausto Foresti, Michael Alfaro & Claudio Oliveira
The Neotropics harbor the most species-rich freshwater fish fauna on the planet, but the timing of that exceptional diversification remains unclear. Did the Neotropics accumulate species steadily throughout their long history, or attain their remarkable diversity recently? Biologists have long debated the relative support for these museum and cradle hypotheses, but few phylogenies of megadiverse tropical clades have included sufficient taxa to distinguish between them. We used 1288 ultraconserved element loci spanning 293 species, 211...

High tree diversity enhances light interception in tropical forests

Marina Melo Duarte, Caroline Isaac Ferreira Zuim, Taísi Bech Sorrini, Luís Eduardo Bernardini, Rafael De Andrade Moral, Joannes Guillemot, Catherine Potvin, Wagner Hugo Bonat, José Luiz Stape & Pedro Henrique Santin Brancalion
We used two forest plantation experiments, the Sardinilla site in Panama (containing monocultures, 2-, 3- and 5-species mixtures in the main plantation, established in 2001, and 6-, 9- and18-species mixtures in the high-diversity plantation, established in 2003), and the Anhembi site in Brazil (established in 2006, containing 20-, 58- and 114-species mixtures), to investigate the effects of forest tree richness on the amount and distribution (horizontal, vertical and temporal) of intercepted ligh (red:far-red ratio -...

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...

Data for: Africa’s oldest dinosaurs reveal early climatic suppression of dinosaurian distribution

Christopher Griffin, Brenen Wynd, Darlington Munyikwa, Timothy Broderick, Michel Zondo, Stephen Tolan, Max Langer, Sterling Nesbitt & Hazel Taruvinga
The vertebrate lineages that would shape Mesozoic and Cenozoic terrestrial ecosystems originated within faunas across Triassic Pangaea1-11. By the Late Triassic (Carnian Stage, ~235 Ma), cosmopolitan ‘disaster faunas’12-14 had given way to highly endemic assemblages12,13 on the supercontinent. Testing the tempo and mode of the establishment of this endemism is challenging—paradoxically, there were few geographic barriers to dispersal across Pangaea during the Late Triassic. Instead, palaeolatitudinal climate belts, and not continental boundaries, are hypothesized to...

Tempo and mode of evolution of Oryzomyine rodents (Rodentia, Cricetidae, Sigmodontinae): a phylogenomic approach

Alexandre Percequillo, Joyce Prado, Edson Abreu, Jeronymo Dalapicolla, Ana Carolina Pavan, Elisandra Chiquito, Pamella Brennand, Scott Steppan, Alan Lemmon & Emily Lemmon
The tribe Oryzomyini is an impressive group of rodents, comprising 30 extant genera and an estimated 147 species. Recent remarkable advances in the understanding of the diversity, taxonomy and systematics of the tribe have mostly derived from analyses of single or few genetic markers. However, the evolutionary history and biogeography of Oryzomyini, its origin and diversification across the Neotropics, remain unrevealed. Here we use a multi-locus dataset (over 400 loci) obtained through anchored phylogenomics to...

Data from: Effects of food intake and hydration state on behavioral thermoregulation and locomotor activity in the tropidurid lizard Tropidurus catalanensis

Dylan J. Padilla Perez, Jose Eduardo De Carvalho & Carlos Navas
Theoretical models predict that lizards adjust their body temperature through behavioral thermoregulation as a function of food availability. However, behavioral thermoregulation is also governed by interactions among physiological and ecological factors other than food availability, such as hydration state, and sometimes it can even conflict with the locomotor activity of animals. Here, we aimed to investigate the role of food intake and hydration state on behavioral thermoregulation and voluntary locomotor activity in the lizard Tropidurus...

Clinging performance on natural substrates predicts habitat use in anoles and geckos

Amber Wright, Stevie Kennedy-Gold, Emily Naylor, Robyn Screen, Carla Piantoni & Timothy Higham
1. For arboreal lizards, the ability to cling or adhere to the substrate is critical for locomotion during prey capture, predator escape, thermoregulation, and social interactions. Thus, selection on traits related to clinging is likely strong. 2. Correlations between morphology, performance, and habitat use have been documented in arboreal lizards, providing a framework for using functional traits to predict habitat use in the field. 3. We tested the hypothesis that clinging performance predicts habitat use...

Assessment of genetic diversity and population structure of Eulaema nigrita (Hymenoptera: Apidae: Euglossini) as a factor of habitat type in Brazilian Atlantic forest fragments

Claudineia Costa, Clycie Machado & Tiago Francoy
In many organisms, habitat affects ecological and genetic diversity and, for certain species, it is expected that a large population should have higher genetic diversity than a smaller population. We analysed the genetics of males of the orchid bee, Eulaema nigrita (Hymenoptera: Apidae), and examined the links between local abundance and habitat with genetic diversity. We also investigated the impact of landscape features on genetic population structure, through microsatellite and mitochondrial DNA analysis, among populations...

Human activities with videos, inertial units and ambient sensors

Caetano M. Ranieri, Scott MacLeod, Mauro Dragone, Patricia A. Vargas & Roseli A. F. Romero
Worldwide demographic projections point to a progressively older population. This fact has fostered research on Ambient Assisted Living, which includes developments on smart homes and social robots. To endow such environments with truly autonomous behaviours, algorithms must extract semantically meaningful information from whichever sensor data is available. Human activity recognition is one of the most active fields of research within this context. Proposed approaches vary according to the input modality and the environments considered. Different...

Reconstructing squamate biogeography in Afro-Arabia reveals the influence of a complex and dynamic geologic past

Héctor Tejero-Cicuéndez, Austin H. Patton, Daniel S. Caetano, Jiří Šmíd, Luke J. Harmon & Salvador Carranza
The geographic distribution of biodiversity is central to understanding evolutionary biology. Paleogeographic and paleoclimatic histories often help to explain how biogeographic patterns unfold through time. However, such patterns are also influenced by a variety of other factors, such as lineage diversification, that may affect the probability of certain types of biogeographic events. The complex and well-known geologic and climatic history of Afro-Arabia, together with the extensive research on reptile systematics in the region, makes Afro-Arabian...

The individual-based network structure of palm-seed dispersers is explained by a rainforest gradient

Pâmela Friedemann, Marina Côrtes, Everaldo Castro, Mauro Galetti, Pedro Jordano &
How species interactions change in space and time is a major question in ecology. In tropical forests, plant individuals share mutualistic partners (pollinators or seed dispersers), yet we have little understanding of the factors affecting these individual interaction patterns. We used a seed dispersal individual-based network describing interactions between individuals of a palm species with bird species to investigate how intrinsic and extrinsic characteristics of individual plants influence the network structure. In our work we...

Data for: Phylogenomic analyses reveal non-monophyly of the antbird genera Herpsilochmus and Sakesphorus (Thamnophilidae), with description of a new genus for Herpsilochmus sellowi

Gustavo Bravo, Bret Whitney, Ricardo Belmonte-Lopes, Marcos Bornschein, Natalia Aristizabal, Renata Beco, Jaqueline Battilana, Luciano Naka, Alexandre Aleixo, Marcio Pie, Luis Silveira, Elizabeth Derryberry & Robb Brumfield
The family Thamnophilidae is a species-rich Neotropical radiation of passerine birds. Current classification of its 235 species is mostly based on morphological similarities, but recent studies integrating comprehensive phenotypic and phylogenetic data have redefined taxonomic limits of several taxa. Here, we assess generic relationships of Herpsilochmus, Sakesphorus, Thamnophilus, Biatas, and Dysithamnus using DNA sequences from the mitochondrion, nuclear exons, and ultraconserved elements (UCEs), with further attention to interspecific relationships within Herpsilochmus. We show that Herpsilochmus...

Phylogenomics, introgression, and demographic history of South American true toads (Rhinella)

Danielle Rivera, Ivan Prates, Thomas Firneno, Miguel Rodrigues, Janalee Caldwell & Matthew Fujita
The effects of genetic introgression on species boundaries and how they affect species’ integrity and persistence over evolutionary time have received increased attention. The increasing availability of genomic data has revealed contrasting patterns of gene flow across genomic regions, which impose challenges to inferences of evolutionary relationships and of patterns of genetic admixture across lineages. By characterizing patterns of variation across thousands of genomic loci in a widespread complex of true toads (Rhinella), we assess...

Data from: The negative effect of lianas on tree growth varies with tree species and season

Felipe Mello, Alejandro Venegas-González, Stefan Schnitzer, Ricardo Gomes César & Mario Tomazello-Filho
Lianas reduce tree growth, reproduction, and survival in tropical forests. Liana competition can be particularly intense in isolated forest fragments, where liana densities are high, and thus host tree infestation is common. Furthermore, lianas appear to grow particularly well during seasonal drought, when they may compete particularly intensely with trees. Few studies, however, have experimentally quantified the seasonal effects of liana competition on multiple tree species in tropical forests. We used a liana-removal experiment in...

Registration Year

  • 2021
    48

Resource Types

  • Dataset
    48

Affiliations

  • University of Sao Paulo
    47
  • Sao Paulo State University
    5
  • Federal University of Paraná
    5
  • Duke University
    3
  • Federal University of São Carlos
    3
  • University of California Los Angeles
    3
  • Federal University of Technology – Paraná
    2
  • Estación Biológica de Doñana
    2
  • Oregon State University
    2
  • Museu Paraense Emílio Goeldi
    2