Results 41 to 50 of about 1,274,560 (240)

Genetic divergence between populations of the stingless bee uruçu amarela (Melipona rufiventris group, Hymenoptera, Meliponini): is there a new Melipona species in the Brazilian state of Minas Gerais?

Genetics and Molecular Biology, 2007
Allozyme, microsatellite and random amplified polymorphic DNA (RAPD) molecular markers were used to investigate the within and between population genetic variability and between population genetic differentiation of the Brazilian stingless bee uruçu ...
Mara Garcia Tavares, Luiz Antonio dos Santos Dias, Andréia Arantes Borges, Denilce Meneses Lopes, Angélica Helene Pereira Busse, Ronaldo Guimarães Costa, Tânia Maria Fernandes Salomão, Lucio Antonio de Oliveira Campos   +7 more
doaj   +1 more source

Anthelmintic activity of plant extracts from Brazilian savanna

Veterinary Parasitology, 2017
Helminth infections represent a serious problem for the production of small ruminants that is currently aggravated by resistance to anthelmintic products and has induced a search for control alternatives, such as natural products. In this study, extracts of Turnera ulmifolia L. (leaves and roots), Parkia platycephala Benth.
Oliveira, Andreia F., Costa Junior, Livio M., Lima, Aldilene S., Silva, Carolina R., Ribeiro, Maria N.S., Mesquista, José W.C., Rocha, Cláudia Q., Tangerina, Marcelo M.P., Vilegas, Wagner   +8 more
openaire   +3 more sources

Diversidade beta de plantas que oferecem néctar como recurso floral aos beija-flores em cerrados do Brasil Central

Rodriguésia
Os ambientes abertos de Cerrado têm sido considerados ambientes marginais ou complementares para beija-flores, apesar do registro de considerável número de espécies deste grupo de visitantes florais.
Adriana Oliveira Machado, Paulo Eugênio Oliveira   +1 more
doaj   +1 more source

The biodiversity cost of carbon sequestration in tropical savanna

, 2017
Forest expansion into Brazilian savanna due to fire suppression causes precipitous species loss.
Rossatto, Davi R. [UNESP], Rodolfo C. R. Abreu, Giselda Durigan, Heraldo L. Vasconcelos, Natashi A. Pilon, Rossatto, Davi R., Vasconcelos, Heraldo L., Abreu, Rodolfo C. R., Pilon, Natashi A., Davi R. Rossatto, William A. Hoffmann, Durigan, Giselda, Hoffmann, William A.   +12 more
core   +1 more source

Deforestation and Efficiency: Insights From Forest Transition in the Brazilian Cerrado

Agribusiness, EarlyView.
ABSTRACT This paper estimates technical efficiency (TE) and environmental efficiency (EE) of agricultural production at the municipal level of the Brazilian Cerrado in 2006 and 2017, and investigates their underlying mechanisms in relation to forest transition theory.
Ricardo Muniz Simões, Cassiano Bragagnolo, Humberto Francisco Silva Spolador   +2 more
wiley   +1 more source

Herbarium‐based measurements are reliable predictors of fresh plant traits in Neotropical Myrtaceae

Applications in Plant Sciences, EarlyView.
Abstract Premise Herbarium specimens are increasingly used to extract morphological traits for ecological and evolutionary studies, yet the effects of tissue desiccation on trait measurements remain poorly understood. Here, we tested two hypotheses: (H1) whether higher tissue water content leads to greater measurement changes after herborization and ...
Yacov Kilsztajn, Lázaro Henrique Soares Moraes de Conceição, Thais Vasconcelos, Carolyn Elinore Barnes Proença, Vanessa Graziele Staggemeier   +4 more
wiley   +1 more source

Hierarchical mapping of Brazilian Savanna (Cerrado) physiognomies based on deep learning [PDF]

, 2021
The Brazilian Savanna, also known as Cerrado, is considered a global hotspot for biodiversity conservation. The detailed mapping of vegetation types, called physiognomies, is still a challenge due to their high spectral similarity and spatial variability.
Girolamo-Neto, Cesare D., Fonseca, Leila M. G., Neves, Alana K., Heipke, Christian, Körting, Thales S., Soares, Anderson R.   +5 more
core   +1 more source

Morpho‐functional analyses of the jaw apparatus in the Blue‐and‐yellow Macaw (Ara ararauna, Psittaciformes, Aves): Adaptations to feeding behavior

The Anatomical Record, EarlyView.
Abstract Macaws are renowned for processing dry, mechanically resistant fruits, yet the species‐level anatomical and functional correlates of this performance remain incompletely resolved. We examined the feeding apparatus of the Blue‐and‐yellow Macaw (Ara ararauna) using an integrated approach that combines osteology, myology, and bite‐force estimates
Sérgio R. Posso, Ana Caroline M. Barbosa, Victor R. Caciatori   +2 more
wiley   +1 more source

MARKET OF NON-WOOD FOREST PRODUCTS FROM BRAZILIAN SAVANNA

Ciência Florestal, 2009
In this article, we analyze the main non-wood forest products from Brazilian savanna. We studied the behavior and the growth rates of production and prices of almond of babaçu, oil of copaiba, fiber of buriti, leaf of jaborandi, bark of barbatimão, bark ...
Sandra Regina Afonso, Humberto Ângelo
doaj   +1 more source

Species composition and community structure of dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) compared among savanna and forest formations in the southwestern Brazilian Cerrado [PDF]

Zoologia (Curitiba), 2020
Although dung beetles are important members of ecological communities and indicators of ecosystem quality, species diversity, and how it varies over space and habitat types, remains poorly understood in the Brazilian Cerrado.
Jorge Luiz da Silva, Ricardo José da Silva, Izaias Médice Fernandes, Wesley Oliveira de Sousa, Fernando Zagury Vaz-de-Mello   +4 more
doaj   +3 more sources