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| Uehara-Prado,Marcio; Bello,Ayr de M.; Fernandes,Juliana de O.; Santos,Adalberto J.; Silva,Igor A.; Cianciaruso,Marcus V.. |
| Fire is a major determinant of structure and dynamics in savannas, and the rapid increase of human activities in this biome has changed the natural burning regime. The effects of fire on the fauna of the cerrado (Brazilian savanna) are still poorly understood, and studies comparing sites frequently and infrequently burned are scarce. In this study, the abundance of epigaeic arthropod orders and trophic guilds was assessed in cerrado sites located in the Brazilian Central Plateau that were subjected to three burning frequencies: frequent (HighFi), intermediary (MidFi), and infrequent (LowFi). In general, we found a positive relationship between the abundance of epigaeic arthropods and fire frequency. When arthropods were analyzed by orders, the abundance of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachnida; Burning; Cerrado; Insecta; Trophic guilds. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000500008 |
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| Vieira,Thiago B.; Tejerina-Garro,Francisco L.. |
| The aim of this study was to test whether the richness observed and the biomass per trophic group of fish assemblages vary depending on the order (1st and 2nd) of the streams located in three different basins of the Upper Paraná River Basin, Central Brazil. Samples were collected between April and September, 2009, in 27 streams of the Meia Ponte, Piracanjuba and Santa Maria River basins. A total of 4,879 specimens were collected distributed in 59 species and 19 families. The statistical analyses carried out indicate that the observed richness and biomass of omnivore fish were influenced by the interaction of two factors: stream order and basin. The 2nd order streams located in the Santa Maria basin presented significant differences in the observed richness... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trophic guilds; Omnivores; Richness; Biomass. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200007 |
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| Oliveira,Edson Fontes; Goulart,Erivelto; Breda,Luciani; Minte-Vera,Carolina Viviana; Paiva,Luiz Ricardo de Souza; Vismara,Melina Rizzato. |
| Ecomorphological patterns of the fish assemblage from the upper Paraná River floodplain, Brazil, were described and evaluated according to trophic (guilds), spatial (habitats) and phylogenetic (taxonomic distances) structures. The samples were obtained through the Long Term Research Project (LTER-CNPq/UEM/NUPELIA) in August and October 2001. Thirty-five species were analyzed from thirty-one morphological variables. Strong significant correlations (Mantel test) between morphology and trophic guilds and between morphology and taxonomy were found, while morphology and habitat revealed a weak correlation. However, the partial Mantel test showed that the correlations between morphology and trophic guilds persist even when the effect of taxonomy is discounted.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecomorphology; Ecomorphotypes; Trophic guilds; Habitat diversity; Phylogeny; Upper Paraná River. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000300002 |
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| Rocha,Adélia R. M.; Di Beneditto,Ana Paula M.; Pestana,Inácio A.; Souza,Cristina Maria M. de. |
| ABSTRACT The aim of this study was to evaluate the isotopic profile and mercury (Hg) concentrations in fish (carnivores, omnivores and detritivores) in the lower portion of the rio Paraíba do Sul watershed, southeastern Brazil. Carbon (δ13C) isotopic analyses revealed that pelagic and benthonic sources are part of the feeding of the fish from the different guilds (-14.0 to -24.8 ‰). The benthic sources are usually enriched in δ13C (-16.9‰, from watershed runoff) compared to pelagic sources because the phytoplankton, important primary producer that supports several pelagic chains, has δ13C signature lighter (-23.9‰). The nitrogen (δ15N) isotopic signatures indicated that most guilds were at the same trophic position (10.0 to 15.5 ‰), except for pelagic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon; Freshwater; Hg; Nitrogen; Trophic guilds. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400723 |
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| Castillo-Figueroa,Dennis; Martínez-Medina,Daniela; Rodríguez-Posada,Miguel E.; Bernal-Vergara,Sandra. |
| Abstract The Colombian Orinoquia region is characterized by a high diversity of mammals, which is associated with complex ecosystems that include large extensions of Neotropical savannas (known locally as “Llanos Orientales”). Despite accelerated anthropogenic transformations in savanna ecosystems, the knowledge to design effective conservation strategies, such as the distribution of mammal assemblages, is still lacking for this region. In this paper, we evaluate if assemblages of medium and large mammals (i.e., species richness, relative abundance and the contribution of the different trophic guilds) are homogeneous across the Colombian Llanos by comparing three savanna ecosystems: floodplains savannas associated with an Andean river, aeolian floodplains... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical savanna; Orinoco plains; Camera trapping; Medium- and large-sized mammals; Trophic guilds. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100214 |
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