Results 41 to 50 of about 4,790 (125)

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

Analysis of the influence of tourism on nesting beaches for the Amazon turtle (Podocnemis expansa) on the Crixás-Açu river

Acta Scientiarum: Biological Sciences
Freshwater turtles play an important ecological and social role, with Podocnemis expansa (arrau turtle) being the largest freshwater Testudine in Latin America.
Lívia Schroder Memória Paiva, Tairone Paiva Leão, Paulo Lopes Ribeiro, Leo Caetano Fernandes da Silva, Mariana Pastori Lara, Rodrigo Diana Navarro   +5 more
doaj   +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

Hyperdominant Trees Reveal Savanna Vulnerability Under Climate Change

Global Change Biology, Volume 32, Issue 4, April 2026.
The Brazilian Cerrado's forest structure relies disproportionately on just 30 hyperdominant tree species, which represent 50% of all individuals despite accounting for only 2% of species richness. This study evaluates their vulnerability under climate change scenarios for 2100.
Facundo Alvarez, Ben Hur Marimon‐Junior, Beatriz Schwantes Marimon, Wesley Jonatar Alves da Cruz, Norberto Gomes Ribeiro Júnior, Raiane Gonçalves Béu, Polyanna da Conceição Bispo, Aldair de Souza Medeiros, Glécio Machado Siqueira, Marcelo Leandro Bueno, Fabiana de Gois Aquino, Frederico Augusto Guimarães Guilherme, José Roberto Rodrigues Pinto, Henrique Augusto Mews, Bruno Machado Teles Walter, Sabrina do Couto de Miranda, Ricardo Flores Haidar, Eddie Lenza de Oliveira, Renata Dias Françoso Brandão, Eraldo Aparecido Trondoli Matricardi, Cássia Beatriz Rodrigues Munhoz, Edson de Souza Lima, Maria Antônia Carniello, Mercedes Maria da Cunha Bustamante, Paulo Sérgio Morandi, Edmar Almeida de Oliveira, Zenésio Finger, Eder Carvalho das Neves, Fernando Elias, Immaculada Oliveras Menor, Simone Matias de Almeida Reis, Oliver Phillips, Ted R. Feldpausch   +32 more
wiley   +1 more source

INDICATORS OF ENVIRONMENTAL HEALTH: AN APPROACH THROUGH THE METHOD PROMETHEE II

Redes, 2016
The large number of environmental factors that can affect human health is indicative of the complexity of existing interactions and range of actions needed to improve the environmental determinants of health factors, which may be social, economic and ...
José Ribamar Marques de Carvalho, Enyedja Kerlly Martins de Araújo Carvalho, Sérgio Murilo Santos de Araújo, Renilson Targino Dantas   +3 more
doaj   +1 more source

Modeling and hydraulic performance evaluation of a dripper device coupled to a branched water distribution network

Revista Ambiente & Água, 2019
Irrigation is responsible for approximately 70% of the world’s freshwater consumption and is one of the key factors behind the growing global water scarcity. Irrigation systems and techniques are extremely differentiated and complex.
Renato Braga Zanca, Fernando das Graças Braga da Silva, Daniele Ornaghi Sant`Anna, Alex Takeo Yasumura Lima Silva, Hélcio Francisco Villa Nova, Ivan Felipe dos Santos, José Antônio Tosta dos Reis   +6 more
doaj   +1 more source

Captação do dióxido de carbono pela Caatinga, em regiões semiáridas do nordeste do Brasil

Territorium: Revista Portuguesa de riscos, prevenção e segurança
A vegetação é uma das grandes responsáveis pela absorção do dióxido de carbono (CO2) do planeta, o qual é utilizado no processo de fotossíntese. Uma das variáveis utilizadas para quantificar o CO2 que um ecossistema absorve é a Produtividade Primaria ...
Célia Campos Braga, Karlla Karem Silva de Lima, Madson Tavares Silva, Antônia Silânia de Andrade   +3 more
doaj   +1 more source

Tecnologias sociais no Rio Grande do Norte: algumas discussões sobre a convivência com o Semiárido

Sustentabilidade em Debate, 2016
As tecnologias sociais (TSs) têm se constituído em uma ferramenta de poder, uma vez que carregam um forte apelo de quebra do paradigma entre o combate às secas e a convivência com o semiárido.
Valdenildo Pedro da Silva, Evelyn Christie Nascimento de Barros   +1 more
doaj   +1 more source

Assessment of Volatile Chemical Composition of the Essential Oil of Jatropha ribifolia (Pohl) Baill by HS-SPME-GC-MS Using Different Fibers

Journal of Analytical Methods in Chemistry, 2013
The chemical composition of essential oil and volatile obtained from the roots of Jatropha ribifolia (Pohl) Baill was performed in this work. The Clevenger extractor was utilized in hydrodistillation of oil and chemical composition determined by gas ...
Celia Eliane de Lara da Silva, Willian Ferreira da Costa, Sandro Minguzzi, Rogério Cesar de Lara da Silva, Euclésio Simionatto   +4 more
doaj   +1 more source