Results 41 to 50 of about 770,997 (175)

RESENHA: A questão geopolítica da Amazônia

open access: yesColeção Meira Mattos
O livro A questão geopolítica da Amazônia: da soberania difusa à soberania restrita aborda a evolução da importância da Amazônia e da soberania brasileira sobre a região.
Everaldo Bastos Furtado
doaj   +1 more source

Challenges and Advances Driving Studies on Aquatic Insects of the Order Coleoptera

open access: yesFreshwater Biology, Volume 71, Issue 7, July 2026.
ABSTRACT Aquatic beetles (Coleoptera) are known for their high taxonomic and ecological diversity and their sensitivity to environmental changes, making them key bioindicators in ecological assessments. However, numerous knowledge gaps persist globally.
Everton Cruz da Silva   +17 more
wiley   +1 more source

Hepatite fulminante na Amazônia brasileira

open access: yes, 2004
O autor faz uma revisão e atualização sobre os resultados das pesquisas envolvendo a hepatite de Lábrea e outras hepatites fulminantes da Amazônia ocidental brasileira, com ênfase nas características epidemiológicas, clínicas e histopatológicas e na ...
José Carlos Ferraz da Fonseca
core   +1 more source

Amazônia brasileira:

open access: yesConvergências - Revista de Investigação e Ensino das Artes
A difusão do turismo no Brasil favorece o desenvolvimento econômico em diversas regiões, repercutindo, de modo considerável nos estados que integram a Amazônia legal.
Francisco de Assis Sousa Lobo   +2 more
doaj   +1 more source

Climate Predicts Tree Dispersal Strategies Across Brazil's Ecosystems

open access: yesGlobal Ecology and Biogeography, Volume 35, Issue 7, July 2026.
ABSTRACT Aim We investigate the distribution of dispersal modes—endozoochory (via animal ingestion), synzoochory (via animal seed accumulation) and anemochory (via wind)—and seed mass of woody plants across Brazilian ecosystems, testing whether their relative abundance in local plant communities could be predicted by climate, edaphic factors and ...
Fernanda C. Souza   +126 more
wiley   +1 more source

Histórico e desafios da pecuária bovina na Amazônia. [PDF]

open access: yes, 2020
A expectativa é que este texto forneça uma nova visão sobre essa área do conhecimento, muitas vezes mal compreendida. Espera-se, também, que as informações aqui apresentadas subsidiem positivamente as decisões de investimento em pesquisa agropecuária e ...
DIAS-FILHO, M. B., LOPES, M. J. dos S.
core   +1 more source

Wasp and Ant Nests: Who Really Protects Whom? New Insights From Amazonian Forests

open access: yesAustral Ecology, Volume 51, Issue 5, May 2026.
ABSTRACT Studies of animal behaviour are often biased towards species that are large‐bodied or have broad geographic ranges, as these are easier to observe in nature. Consequently, our understanding of behavioural ecology is shaped by such biases, even though these studies have provided important insights.
Sergio Santorelli Junior   +4 more
wiley   +1 more source

First record of Pelecinus polyturator (Drury, 1773) (Hymenoptera: Pelecinidae) from Ceará state, Brazil

open access: yesEntomological Communications, 2022
We record for the first time the species Pelecinus polyturator (Drury, 1773) in the Ceará state, Brazil. Most specimens were collected in March, the peak of the rainy season in the humid mountain ranges. In addition, digital images of the P. polyturator
Antonio W. A. Soares   +2 more
doaj   +1 more source

Uso e percepção de áreas de preservação permanente em assentamento ambientalmente diferenciado em Anapu, Pará

open access: yesEstudos Sociedade e Agricultura, 2018
Este estudo avaliou como residentes de um assentamento ambientalmente diferenciado em Anapu, Pará, percebem e utilizam florestas e áreas de preservação.
Laís Victoria Ferreira de Sousa   +1 more
doaj   +1 more source

Stemflow Dynamics in the Jamari National Forest (Brazilian Amazon): I. The Role of Tree Structure

open access: yesBiotropica, Volume 58, Issue 3, May 2026.
A portion of rainfall that contacts tree canopies is drained down tree stems as stemflow. Stemflow is an underexamined component of rainfall partitioning in tropical forests. To investigate how tree canopy structural attributes influence stemflow in the Brazilian Amazon, we measured stemflow, rainfall, and dendrometric parameters of 56 trees in the ...
Jeferson Alberto de Lima   +5 more
wiley   +1 more source

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