Results 31 to 40 of about 4,795 (153)

Unusual occurrence of Cochlichnus in aeolian sandstones: evidence for a stiletto fly larval origin

Papers in Palaeontology, Volume 12, Issue 3, May/June 2026.
Abstract Cochlichnus anguineus is an ichnotaxon recognized for its distinctive regular wavy morphology. It is a characteristic trace fossil typically associated with aquatic and marginal aquatic environments. However, in this study we examine its unusual occurrence in the aeolian sandstones of the Botucatu Formation (Lower Cretaceous, Paraná Basin ...
Bernardo de C. P. e M. Peixoto, Gabriel E. B. de Barros, Diego Luciano Nascimento, Andrew K. Rindsberg, Gabriel Bertolini, Thândara Jacob, Renato P. Ghilardi, Marcelo A. Fernandes, Heitor R. D. Francischini   +8 more
wiley   +1 more source

A New Look into the South America Precipitation Regimes: Observation and Forecast

Atmosphere, 2022
South America is a vast continent characterized by diverse atmospheric phenomena and climate regimes. In this context, seasonal climate predictions are helpful for decision-making in several relevant socioeconomic segments in this territory, such as ...
Glauber W. S. Ferreira, Michelle S. Reboita   +1 more
doaj   +1 more source

A conservação dos recursos naturais

Revista do Serviço Público, 1957
No processo de organização da vida brasileira, em todos os sentidos, nãose pode deixar à margem, como até agora temos feito, os problemas un amentais do reconhecimento e do uso dos bens existentes em este. o naturana terra. Uma constante de boa ocupação do espaço íísico deve ser posta emtêrmos paralelos com o sentido moderno da melhor ocupação dos ...
openaire   +2 more sources

Frost Decreases Fruit Production in a Neotropical Savanna: Implications for Frugivorous Bird Abundances

Biotropica, Volume 58, Issue 3, May 2026.
Severe frost events seem to be happening on average every 5 years, rather than 7 years, as previously reported in the southern limit of the Cerrado, a Neotropical savanna. We conducted this study in the Cerrado, where severe frost events allowed us to compare fruit production and frugivorous bird abundance before and after the disturbance.
Mariana Campagnoli, Augusto Florisvaldo Batisteli, Alexander V. Christianini   +2 more
wiley   +1 more source

Avaliação da Detecção de Desmatamento por Métodos de Sensoriamento Remoto no Estado do Tocantins, Brasil, entre 2006/2007 e 2010/2011

Revista Brasileira de Cartografia, 2014
Amazonia and Cerrado are the largest Brazilian biomes that have been affected by the clear-cutting of native vegetation. This study analyzed the deforestation in Tocantins state in Brazil from 2006/2007 to 2010/2011.
Gustavo Maximiano Junqueira Lazzarini, Gudmar Regino Dias Magalhães, Flávia Imaculada da Silva, Edivaldo Dias Barbosa, Emerson Figueiredo Leite   +4 more
doaj  

High temperature photoluminescence sensitivity of Te4+ in silver nanoparticle tellurite glasses: Application as optical temperature sensor

Next Materials
Tellurite glasses with the composition (in mol%) (100-x)(75TeO2:25Li2O):xAgNO3 (x = 0, 0.6, and 1.2) were synthesized at 800 °C in an ambient atmosphere, for investigation of the influence of Ag nanoparticles on the Te4+ semi metal ion photoluminescence (
Adriana do Carmo Capiotto, Luis Humberto da Cunha Andrade, Junior Reis Silva, Luiz Antonio de Oliveira Nunes, Sandro Marcio Lima   +4 more
doaj   +1 more source

Multiple scales of fear: foraging behaviour of white‐naped jays in semiarid landscapes

Oikos, Volume 2026, Issue 4, April 2026.
Animals must constantly balance the need to find resources with the risk of predation. Not only avoiding direct encounters with predators but also assessing the overall risk of their environment using cues, social information or habitat traits at multiple spatial and temporal scales.
Maria Carolina Beiriz, Luiz A. M. Mestre, Lorenzo R. S. Zanette   +2 more
wiley   +1 more source

Abiotic drivers of co‐occurrence and diversity patterns of Calopterygidae species in Amazonian protected freshwaters

Ecological Entomology, Volume 51, Issue 2, Page 235-249, April 2026.
Species co‐occurrences rely on their ability to explore similar or distinct available resources, and possible niche overlap can prevent their presence and establishment in a given site Damselflies of the Calopterygidae family demonstrated negative co‐occurrences in streams inside and outside PAs, highlighting that their ecological similarity is ...
Joás Silva Brito, Everton Cruz Silva, Gabriel Martins Cruz, Victor Rennan Santos Ferreira, Rafael Costa Bastos, Josinete Sampaio Monteles, Cristian Camilo Mendoza‐Penagos, Fernando Geraldo Carvalho, José Max Barbosa Oliveira‐Junior, Karina Dias‐Silva, Thaisa Sala Michelan, Luciano Fogaça de Assis Montag, Lilian Casatti, Leandro Juen   +13 more
wiley   +1 more source

The role of habitat simplification and seasonality in shaping interactions between ants, plants and herbivores in a neotropical savanna

Ecological Entomology, Volume 51, Issue 2, Page 381-394, April 2026.
We evaluated how chronic anthropogenic disturbances (CAD) and seasonal variation influence interactions between ants and plants with extrafloral nectaries (EFN's), with emphasis on the responses of ants, herbivores, and plants. Ant and herbivore diversity remained stable across seasons in the preserved cerrado, whereas the pasture had higher ant ...
Edvânia Costa de Oliveira Sá, Flávio Camarota, Poliane Neres Morais, Érica Vanessa Durães de Freitas, Frederico Neves, Tatianne Gizelle Marques Silva, Walter Santos de Araújo   +6 more
wiley   +1 more source

Phytotoxic activity of differents plant parts of Drimys brasiliensis miers on germination and seedling development

Bioscience Journal, 2015
The aim of this study was to evaluate the phytotoxic activity of aqueous extracts from mature leaves, stem bark and roots of Drimys brasiliensis Miers on germination and initial seedling development of two target species, Triticum aestivum L. (wheat) and
Simoni Anese, Patrícia Umeda Grisi, Luciana de Jesus Jatobá, Viviane de Cássia Pereira, Sonia Cristina Juliano Gualtieri   +4 more
doaj   +3 more sources