Results 51 to 60 of about 400,020 (225)

Defining a US defence diplomacy for Brazil at the beginning of the century [PDF]

open access: yes, 2009
At the beginning of the 1990s, the US military was apparently considered to be a significant threat by the Brazilian Armed Forces. Other military establishments in the Hemisphere likewise expressed a lack of confidence, and even a sense of fear ...
Zirker, Daniel
core   +1 more source

Fish loss in tropical coastal ecosystems can jeopardise nutrient supply to traditional fishing communities: A case study from Northeast Brazil

open access: yesPeople and Nature, Volume 8, Issue 5, Page 1248-1260, May 2026.
Abstract Fisheries constitute one of the major benefits that oceans provide for people. Yet anthropogenic pressures and global changes are disrupting coastal systems, eroding marine biodiversity and threatening the food security of traditional populations.
Fabricio C. Albuquerque   +4 more
wiley   +1 more source

Projeto cirandar: experiências do seminário integrado em rodas de formação [PDF]

open access: yes, 2014
Trabalho apresentado no 31º SEURS - Seminário de Extensão Universitária da Região Sul, realizado em Florianópolis, SC, no período de 04 a 07 de agosto de 2013 - Universidade Federal de Santa Catarina.Este relato apresenta as sínteses avaliativas ...
Dorneles, Aline Machado   +1 more
core  

Climate‐induced shifts in long‐term tropical tree reproductive phenology: Insights from species dependent on and independent of biotic pollination

open access: yesFunctional Ecology, Volume 40, Issue 5, Page 1286-1298, May 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The dependence on biotic pollination may constrain plant phenological responses because flowering time ultimately defines reproductive success. We proposed a local‐scale study combining long‐term phenology and experimental data to evaluate how a key functional trait—the
Amanda Eburneo Martins   +3 more
wiley   +1 more source

Electron precipitation events in the lower ionosphere and the geospace conditions

open access: yesAnnals of Geophysics, 2013
We present an analysis of localized ionospheric perturbations detected at Comandante Ferraz Brazilian Antarctic Station (McIlwain parameter L~2.25) as fast-amplitude variations of very low frequency (VLF) signals transmitted from Hawaii (NPM, at 21.4 kHz)
José Henrique Fernandez   +1 more
doaj   +1 more source

Variabilidade espacial de propriedades químicas do solo para fins de adubação e calagem localizada em área com cultivo de grãos. [PDF]

open access: yes, 2014
A adequada identificação da variabilidade espacial das propriedades químicas do solo permite o manejo localizado com economia de insumos e aumento da capacidade produtiva.
GREGO, C. R.   +2 more
core  

Landscape features predict broad‐scale seed rain patterns across fragments of the Brazilian Atlantic Forest

open access: yesJournal of Ecology, Volume 114, Issue 5, May 2026.
Along with precipitation, forest cover emerges as a fundamental driver of alpha and beta diversity in the seed rain. This highlights the role of habitat amount at the landscape level over patch‐level features, like patch size, for seed dispersal. However, increased seed density can be related to higher dispersal rates in forest borders.
Luís Felipe Daibes   +63 more
wiley   +1 more source

Delimitação do embasamento da Bacia de Taubaté

open access: yesGeologia USP. Série Científica, 2011
Este trabalho consiste na definição do embasamento da Bacia de Taubaté por meio de métodos geoestatísticos, a partir de dados sísmicos, gravimétricos e informações de poços tubulares profundos.
Ancilla Maria Almeida de Carvalho   +2 more
doaj   +1 more source

Distribution of black leaf streak disease (Mycosphaerella fijiensis Morelet) in Mato Grosso, Brazil

open access: yesBioscience Journal, 2016
Banana black leaf streak disease caused by the present quarantine pest M. fijiensis occurs in Mato Grosso State since 1999 and requires adoption of sanitation, including detection survey.
Omar Roberto da Silveira   +5 more
doaj   +3 more sources

Rarity of monodominance in hyperdiverse Amazonian forests. [PDF]

open access: yes, 2019
Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such "monodominant" forests are known from all of the main tropical regions. For Amazonia, we sampled the occurrence
Alonso, Alfonso   +99 more
core  

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