12 Works

Facilitation by isolated trees triggers woody encroachment and a biome shift at the savanna-forest transition

Rodolfo Abreu, Giselda Durigan, Antônio Carlos Melo, Natashi Pilon & William Hoffmann
1. Woody encroachment into grassy biomes is a global phenomenon, often resulting in a nearly complete turnover of species, with savanna specialists being replaced by forest-adapted species. Understanding the mechanisms involved in this change is important for devising strategies for managing savannas. 2. We examined how isolated trees favor woody encroachment and species turnover by overcoming dispersal limitation and environmental filtering. In a savanna released from fire in southeastern Brazil (Cerrado) we sampled woody plants...

Reflexões a respeito dos Tableaux Vivants: entretenimento, arte figurativa e universo consumista

Leonardo Caldi & Francisco Valle

Data from: Traits that allow bats of tropical lowland origin to conquer mountains: bat assemblages along elevational gradients in the South American Atlantic Forest

William Douglas De Carvalho, Mayara A. Martins, Carlos Eduardo L. Esbérard & Jorge M. Palmeirim
Aim: This study aims to contribute to the identification of ecological determinants of tropical moist forest montane biodiversity, analyzing changes in the structure of bat assemblages along an elevational gradient and testing the role of species traits shaping those assemblages. Location: Mountain ranges in the Brazilian Atlantic Forest. Methods: We compiled a dataset with the composition of phyllostomid bat assemblages at 32 forested sites, ranging from 60m to 1960m a.s.l. We quantified how abundance and...

Interviews from field research in Rio de Janeiro State - Brazil

Nádia Aun & Renato Linhares De Assis
This paper presents a case study on organic agriculture at Região Serrana Fluminense, Rio de Janeiro State, Brazil. We sought to understand what was the role of organic farming, and if it can be considered as an aggregating element between different kind of people or groups who were located in the same region. The methodology used to carry out this investigation was based on the concept of the Rural Network, which enabled us to comprehend...

Data from: Dynamics of coral reef benthic assemblages of the Abrolhos Bank, eastern Brazil: inferences on natural and anthropogenic drivers

Ronaldo B. Francini-Filho, Ericka O. C. Coni, Pedro M. Meirelles, Gilberto M. Amado-Filho, Fabiano L. Thompson, Guilherme H. Pereira-Filho, Alex C. Bastos, Douglas P. Abrantes, Camilo M. Ferreira, Fernando Z. Gibran, Arthur Z. Güth, Paulo Y. G. Sumida, Nara L. Oliveira, Les Kaufman, Carolina V. Minte-Vera & Rodrigo L. Moura
The Abrolhos Bank (eastern Brazil) encompasses the largest and richest coral reefs of the South Atlantic. Coral reef benthic assemblages of the region were monitored from 2003 to 2008. Two habitats (pinnacles’ tops and walls) were sampled per site with 3-10 sites sampled within different reef areas. Different methodologies were applied in two distinct sampling periods: 2003-2005 and 2006-2008. Spatial coverage and taxonomic resolution were lower in the former than in the latter period. Benthic...

Data from: Ecological restoration success is higher for natural regeneration than for active restoration in tropical forests

Renato Crouzeilles, Mariana S. Ferreira, Robin L. Chazdon, David B. Lindenmayer, Jerônimo B. B. Sansevero, Lara Monteiro, Alvaro Iribarrem, Agnieszka E. Latawiec & Bernardo B. N. Strassburg
Is active restoration the best approach to achieve ecological restoration success (the return to a reference condition, that is, old-growth forest) when compared to natural regeneration in tropical forests? Our meta-analysis of 133 studies demonstrated that natural regeneration surpasses active restoration in achieving tropical forest restoration success for all three biodiversity groups (plants, birds, and invertebrates) and five measures of vegetation structure (cover, density, litter, biomass, and height) tested. Restoration success for biodiversity and vegetation...

Educação de jovens e adultos em diferentes tempos e espaços de vida

Luís Alcoforado, Márcia Regina Barbosa & Adriana Alves Fernandes Costa

FragSAD: A database of diversity and species abundance distributions from habitat fragments

Jonathan M. Chase, Mario Liebergesell, Alban Sagouis, Felix May, Shane A. Blowes, Åke Berg, Enrico Bernard, Berry J. Brosi, Marc W. Cadotte, Luis Cayuela, Adriano G. Chiarello, Jean-François Cosson, Will Cresswell, Filibus Danjuma Dami, Jens Dauber, Christopher R. Dickman, Raphael K. Didham, David P. Edwards, Fabio Z. Farneda, Yoni Gavish, Thiago Gonçalves-Souza, Demetrio Luis Guadagnin, Mickaël Henry, Adrià López-Baucells, Heike Kappes … & Yaron Ziv
Habitat destruction is the single greatest anthropogenic threat to biodiversity. Decades of research on this issue have led to the accumulation of hundreds of data sets comparing species assemblages in larger, intact, habitats to smaller, more fragmented, habitats. Despite this, little synthesis or consensus has been achieved, primarily because of non‐standardized sampling methodology and analyses of notoriously scale‐dependent response variables (i.e., species richness). To be able to compare and contrast the results of habitat fragmentation...

Agouti reintroduction recovers seed dispersal of a large-seeded tropical tree

Pedro Mittelman, Catharina Kreischer, Alexandra S Pires & Fernando A S Fernandez
The aim of animal reintroductions has mainly been species recovery; only few reintroduction initiatives focus on ecosystem restoration. Therefore, reintroduction consequences on ecological interactions are seldom assessed. We used the interaction between a reintroduced population of agoutis (Dasyprocta leporina) and a vulnerable tropical endemic tree (Joannesia princeps) to examine reintroduction effects on seed dispersal and seedling establishment. To test the outcomes of this interaction we tracked seeds of J. princeps in two adjacent forest areas...

Data from: Litter microbial and soil faunal communities stimulated in the wake of a volcanic eruption in a semi-arid woodland in Patagonia, Argentina

Paula Berenstecher, Daniela Gangi, Adelia González-Arzac, M. Laura Martínez, Eliseo J. Chaves, Eduardo A. Mondino & Amy T. Austin
Large-scale disturbances can be important components of the temporal landscape of natural ecosystems, but generalities regarding ecosystem impacts are difficult due to their infrequent and unpredictable nature. Volcanic eruptions figure as one of the most prominent of these natural disturbances, but the effects on microbes and ground-dwelling arthropods, which modulate carbon and nutrient turnover, are relatively unknown. We evaluated the effects of the 2011 Puyehue-Cordón Caulle eruption in Patagonia, Argentina, on the litter and soil...

Testing for deterministic succession in metazoan parasite communities of marine fish

Marcelo Oliva, Juan Espinola-Novelo, Maria Gonzalez, Aldo Pacheco & Jose Luque
Parasite communities are similar to free-living communities; decay of similarity over geographic distance, theory of island biogeography, species-area relationships and nestedness have been documented in both communities. Ecological succession has been studied in free-living communities but has rarely been examined in parasite communities. We use seriation with replication to test the hypothesis that succession of parasite community structure is deterministic, thus developing throughout consecutive changes along the fish ontogeny, via a seriated pattern. 12,306 marine...

Savannas are not old fields: functional trajectories of forest expansion in a fire-suppressed Brazilian savanna are driven by habitat generalists

Samuel Flake, Rodolfo Abreu, Giselda Durigan & William Hoffmann
Under fire suppression, many tropical savannas transform into forests. Forest expansion entails changes in environmental variables and plant community structure. We hypothesized that forest expansion into savanna results in a shift in community-weighted mean functional traits from stress tolerance to competitiveness, with generalist species having trait values intermediate between those of specialists of savanna and forest habitats. We studied 30 plots distributed over three savanna-forest boundaries undergoing forest expansion in the Brazilian Cerrado, capturing a...

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