A5042701036- Fish biology, ecology, and behavior
- Ecology and Vegetation Dynamics Studies
- Fish Biology and Ecology Studies
- Plant and animal studies
- Wildlife Ecology and Conservation
- Fish Ecology and Management Studies
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Evolution and Paleontology Studies
- Amphibian and Reptile Biology
- Wildlife-Road Interactions and Conservation
- Ichthyology and Marine Biology
- Geography and Environmental Studies
- Aquaculture Nutrition and Growth
- Environmental and biological studies
- Coral and Marine Ecosystems Studies
- Forest ecology and management
- Aquatic Ecosystems and Phytoplankton Dynamics
- Environmental Sustainability and Education
- Marine and fisheries research
- Avian ecology and behavior
- Animal Behavior and Reproduction
- Botany and Plant Ecology Studies
- Primate Behavior and Ecology
- Animal and Plant Science Education
Universidade Federal do Rio Grande do Sul
2016-2025
University of Rio Grande and Rio Grande Community College
2021
Secretaria de Agricultura e Abastecimento
1996
Universidade Federal de São Carlos
1994
Abstract Araucaria Forest expansion over grassland takes place under wet climate conditions and low disturbance it is hypothesized that isolated trees established on facilitate the establishment of forest woody species beneath their canopies. with angustifolia a particular type Brazilian Atlantic main highland plateau in south Brazil, often forming mosaics natural Campos grassland. The objectives this paper were to evaluate role shrubs as colonization sites for seedlings grassland, determine...
Summary The effectiveness of measures installed to mitigate wildlife road‐kill depends on their placement along the road. Road‐kill hotspots are frequently used identify priority locations for mitigation measures. However, in situations where previous road mortality has reduced population size, may not indicate best sites mitigation. purpose this study was circumstances which appropriate indicators selection sites. We predicted that: (i) can move time from high‐traffic segments low‐traffic...
Feeding habits of six species Astyanax from river Maquiné are described. Fishes were sampled bi-monthly November/95 to September/96 in two zones the river. Items identified, counted and had their abundance estimated according a semi-quantitative scale. Frequency occurrence, alimentary importance index (IFI) values similarity analysis diets for each species-river zone sample examined. All considered typically omnivorous, with insects vegetal matter being most important items diet. These could...
Abstract Aim Body size variation in animal assemblages is a widely addressed pattern biogeographical studies, and affected by both environmental gradients phylogenetic constraints. However, no study has yet explored to what extent the association between body across broad spatial scales influenced distribution of different lineages. In this study, we discriminate influences variables community composition on South American sigmodontine rodents. Location America. Methods We computed mean mass...
The crab-eating fox, Cerdocyon thous (Linnaeus, 1766), is a small canid with twilight and nocturnal habits from savannas forests of South America. In this study, we seasonally determined quantified the diet C. in Lami Biological Reserve, conservation unit 179.78ha situated suburban area municipality Porto Alegre, southern Brazil. During year 2000, collected 80 fecal samples - 20 for each season two or three week sampling intervals, along trails inside Reserve. Samples were dried an oven 24h...
Abstract Questions: 1. Do the species composition, richness and diversity of sapling communities vary significantly in differently sized patches? 2. forest patches different sizes differ woody plant colonization patterns? Location: São Francisco de Paula, Rio Grande do Sul, Brazil, 29°28'S,50°13'W. Methods: Three vegetation types, differing structural development (patch size) recovering for 10 years from cattle burning disturbances, were sampled on grassland. We analysed composition...
Questions: 1. Do the species composition, richness and diversity of sapling communities vary significantly in differently sized patches? 2. forest patches different sizes differ woody plant colonization patterns? Location: São Francisco de Paula, Rio Grande do Sul, Brazil, 29°28'S,50°13'W. Methods: Three vegetation types, differing structural development (patch size) recovering for 10 years from cattle burning disturbances, were sampled on grassland. We analysed composition complexity...
Concentrations of Cd, Cr, Cu and Zn were determined in liver muscle Leporinus obtusidens. During 2003, the fishes (N = 54) sampled from three sites along Guaíba Lake (north, central south zones). The hypotheses tested assumed that there differences location date as to levels contamination, association between trace metal content size, sex influenced accumulation. Possible risks contaminated fish consumption human health also evaluated. level mean concentration (µg/g) metals tissues was...
The community structure of pond systems is affected by resource competition, predation and degree permanence water. Here we evaluated the effect permanence–predation gradient in ponds on species richness guild composition tadpoles. study was carried out at Caçapava do Sul southern Brazil. Tadpoles invertebrate predators were sampled 38 different sizes degrees permanence. collections twice, spring 2007 summer 2008. We ordinated a single dimension through non-metric multidimensional scaling....
The relationships between fish composition, connectivity and morphometry of 103 lagoons in nine freshwater ecoregions (FEOW) 2·83° S 37·64° were evaluated order to detect possible congruence the gradient species richness similarities assemblage composition. Most included study <2 km(2) , with a maximum 3975 surface area. Combined area all was 5411 . Number varied locally from one 76. A multiple regression revealed that latitude, attributes connectivity, sampling effort explained large amount...
Replacement of native habitats by tree plantations has increased dramatically in Brazil, resulting loss structural components for birds, such as appropriate substrates foraging and nesting. Tree can also reduce faunal richness change the composition bird species. This study evaluated structure avian communities eucalyptus different ages a forest. We classified species habitat specialists or generalists, assessed if found are subset that occur Forty-one sampling sites were evaluated, with...
Birds are important bioindicators of environmental change and perform essential processes for ecosystem functioning. Afforestation grasslands may lead to the reduction or loss specific functions performed by bird species. We investigated effects afforestation in southeastern South America on taxonomic functional diversity birds using multidimensional indices. collected data from communities mosaics native habitat eucalyptus plantations. recorded impoverishment plantations, but no was found...
Feeding associations between capybaras Hydrochoerus hydrochaeris (Linnaeus, 1766) and some bird species were registered in the Lami Biological Reserve, southern Brazil, through observations a set of transects established five major vegetation types study area: shrubby herbaceous swamps, wet grasslands, sandy grasslands forests. Data included: date time, type, species, number individuals (birds capybaras), type prey consumed, foraging strategy birds behavior relation to presence birds. Five...
Abstract Questions: In a natural grassland‐forest mosaic: What is the influence of phylogeny and diaspore traits related to disperser attraction (DAT) on (1) seed size/number trade‐off (SSNT) in woody species colonizing forest patches; (2) frequency species? 3. patch area mean size number. 4. Do DAT expressed at level affect this relationship? Location: Campos grassland Araucaria São Francisco de Paula, RS, Brazil, ca. 29°28’ S; 50° 13’ W. Methods: Forest patches different sizes site...
In this paper, we discuss some key aspects for the maintenance of biological diversity in grassland–forest mosaics southern Brazil (Campos Sulinos) not explored yet. Campos Sulinos are grasslands distributed throughout Pampa and Atlantic Forest biomes. Since these remain from past dryer colder climatic conditions, they acknowledged as native rather than anthropogenic ecosystems (Pillar Velez, 2010). The form with shrubby forest physiognomies belonging to Araucaria seasonal forests Brazil,...
RESUMO A urbanização é um processo globalmente estudado e considerado dos distúrbios mais drásticos sobre a biodiversidade. Este estudo teve como objetivo avaliar diferentes intensidades de atuam na estruturação da avifauna em uma cidade tamanho médio inserida região área úmida. Além das métricas tradicionais riqueza, abundância composição taxonômica, verificou-se diversidade redundâncias funcionais aves são influenciadas pelo gradiente urbano. urbana estudada foi Pelotas (31°46'S, 52°20'W),...
Abstract This study investigates how abundance, diversity and composition of understorey spiders were influenced by four different forest habitats in a southern Brazilian Araucaria forest. The area encompasses landscape mosaic comprised forest, plantation, Pinus Eucalyptus plantation. Understorey collected beating the vegetation inside three patches each habitat. To assess possible predictors spider assemblage structure, several patch features analysed: potential prey abundances, estimation...
Questions: In a natural grassland-forest mosaic: What is the influence of phylogeny and diaspore traits related to disperser attraction (DAT) on (1) seed size/number trade-off (SSNT) in woody species colonizing forest patches; (2) frequency species? 3. patch area mean size number. 4. Do DAT expressed at level affect this relationship? Location: Campos grassland Araucaria São Francisco de Paula, RS, Brazil, ca. 29°28’ S; 50° 13’ W. Methods: Forest patches different sizes site recovering for...