Reproductive systems and low outbreeding barriers between Jacaranda cuspidifolia and J. mimosifolia (Jacarandeae, Bignoniaceae)Nelson Bittencourt
The genus Jacaranda shows notable karyotype stability and a prevailing self-sterile breeding system with evidence of late-acting self-incompatibility in several species. However, some studies have indicated self-compatibility in J. mimosifolia, a species cultivated worldwide in tropical and subtropical areas. Jacaranda cuspidifolia is a close related species with natural distribution broadly overlapping to that of J. mimosifolia, and manual heterospecific pollination studies have indicated that these species are interfertile, but there is no report on the...
Shorebirds join cohesive flocks for safety. The joining of individuals of several species in large heterospecific flocks can optimise individual vigilance and foraging. However, a large number of conspecific individuals in flocks may deplete food resources and increase intraspecific competition. In the present study, we argue that Nearctic-Neotropical migratory shorebird species join large heterospecific flocks in a balanced number as a way of controlling intraspecific competition. We recorded monospecific and heterospecific flocks in urban beaches...
Aim: Plant species continue to be moved outside of their native range by human activities. Here, we aim at determining whether, once introduced, plants assimilate into native communities, or whether they aggregate, thus forming mosaics of native- and alien-rich communities. Alien species may aggregate in their non-native range due to shared habitat preferences, such as their tendency to establish in high-biomass, species-poor areas. Location: 22 herbaceous grasslands in 14 countries, mainly in the temperate zone....
Data from: The circular nature of recurrent life-cycle events: a test comparing tropical and temperate phenologyVanessa 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: Competition and resource breadth shape niche variation and overlap in multiple trophic dimensionsRaul 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...
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...
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...
Contemporary and historical factors influence assemblage structure. The environmental and spatial influences acting on fish organization of rainforest coastal streams in the Atlantic rainforest of Brazil were examined. Fish (and functional traits such as morphology, diet, velocity preference, body size), environmental variables (pH, water conductivity, dissolved oxygen, temperature, stream width, flow, depth, substrate) and altitude were measured from 59 stream reaches. Asymmetric eigenvector maps were used to model the spatial structure considering direction of fish...
Data from: Seed-dispersal networks in tropical forest fragments: area effects, remnant species, and interaction diversityCarine Emer, Pedro Jordano, Marco Aurélio Pizo, Milton Cezar Ribeiro, Fernanda Ribeiro Da Silva & Mauro Galetti
Seed dispersal interactions involve key ecological processes in tropical forests that help to maintain ecosystem functioning. Yet this functionality may be threatened by increasing habitat loss, defaunation and fragmentation. However, generalist species, and their interactions, can benefit from the habitat change caused by human disturbance while more specialized interactions mostly disappear. Therefore changes in the structure of the local, within fragment, networks can be expected. Here we investigated how the structure of seed-dispersal networks changes...
Data from: Insights on the functional composition of specialist and generalist birds throughout continuous and fragmented forestsLuiz 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: Intraspecific and interspecific trait variability in tadpole metacommunities from the Brazilian Atlantic rainforestMainara Xavier Jordani, Nicolas Mouquet, Lilian Casatii, Marcelo Menin, Denise De Cerqueira Rossa-Feres & Cécile H. Albert
1. A better understanding of species coexistence and community dynamics may benefit from more insights on trait variability at the individual and species levels. 2. Tadpole assemblages offer an excellent system to understand the relative influence of intra- and interspecific variability on community assembly, due to their high phenotypic plasticity, and the strong influence that environmental variables have on their spatial distribution and individual performance. 3. Here we quantified the intra- and interspecific components of...
Sao Paulo State University12
State University of Campinas2
University of Camerino1
Universidade Federal de Goiás1
Estación Biológica de Doñana1
Islamic Azad University1
University of Pretoria1
Federal University of São Carlos1
Agência Paulista de Tecnologia dos Agronegócios1
University of Saskatchewan1