Results 31 to 40 of about 1,719 (122)

Fine‐scale patterns of genetic structure in three species of forest birds reveal dynamic Pleistocene history within an Amazonian interfluve

open access: yesIbis, Volume 168, Issue 3, Page 972-984, July 2026.
Phylogeographical studies of Amazonian birds have revealed large intraspecific diversity, even within recognized areas of endemism. To understand the origin and organization of Amazonian diversity, including the influence of current and historical landscapes, we need to evaluate fine‐scale patterns of genetic diversity in relation to detailed ...
Affonso Henrique Nascimento de Souza   +4 more
wiley   +1 more source

Avaliação preliminar de diversas gramíneas e leguminosas de inverno em Várzea do Paraíba SP

open access: yesBoletim de Indústria Animal, 2014
O trabalho foi conduzido durante dois anos, na Estação Experimental de Zootecnia de Pindamonhangaba, SP, do Instituto de Zootecnia, em ensaios de parcelas num solo hidromórfico argilo-arenoso de várzea previamente drenada. Os tratamentos foram distribuídos em blocos ao acaso, com quatro repetições No primeiro ano (1983) foram estudadas as ...
José Roberto Cosentino   +3 more
openaire   +7 more sources

Tree stem methane emissions are regulated by site‐level biogeochemistry over species identity in Amazon floodplain forests

open access: yesNew Phytologist, Volume 251, Issue 1, Page 179-190, July 2026.
Summary Tree stems in Amazonian floodplains emit substantial methane (CH4), yet controls on emission variability remain unclear. Emissions span orders of magnitude between várzea (nutrient‐rich) and igapó (nutrient‐poor) forests and among trees, suggesting controls beyond flooding.
Holly R. Blincow   +9 more
wiley   +1 more source

Spatial patterns of medium and large size mammal assemblages in várzea and terra firme forests, Central Amazonia, Brazil.

open access: yesPLoS ONE, 2018
Várzea forests account for 17% of the Amazon basin and endure an annual inundation that can reach 14 m deep during 6-8 months. This flood pulse in combination with topography directly influences the várzea vegetation cover.
Guilherme Costa Alvarenga   +5 more
doaj   +1 more source

Comparação entre florestas de várzea e de terra firme do Estado do Pará Comparision between "várzea" and "terra firme" forests in the state of Para

open access: yesRevista Árvore, 2005
Foram analisados agrupamentos florísticos entre comunidades arbóreas localizadas em diferentes locais do Estado do Pará, por meio de um banco de dados composto por 24 inventários em florestas de terra firme e 10 em floresta de várzea.
João Ricardo Vasconcellos Gama   +3 more
doaj   +1 more source

Interplay Between River Formation and Historical Climatic Changes Drove Diversification of the Thamnomanes caesius and T. schistogynus (Passeriformes, Thamnophilidae) Species Complex Across Amazonian and Atlantic Forests

open access: yesZoologica Scripta, Volume 55, Issue 4, Page 555-567, July 2026.
ABSTRACT The Amazon and Atlantic forests harbour immense biodiversity shaped by complex evolutionary history with diverse processes leading to species build‐up. We investigated the Cinereous Antshrike species complex (Thamnomanes caesius and T. schistogynus) to disentangle the relative contributions of riverine barriers and historical climatic ...
Henrique Batalha‐Filho   +6 more
wiley   +1 more source

Artificial intelligence in neurosurgical decision-making: Can the surgeon trust the algorithm?

open access: yesEgyptian Journal of Neurosurgery
The integration of artificial intelligence (AI) into neurosurgical practice represents one of the most transformative shifts in modern medicine. Artificial intelligence is not an inherent threat to neurosurgical practice — it is a powerful tool that, if ...
Gabriel Henrique Simoni   +7 more
doaj   +1 more source

Insulated Concrete Forms – tecnologia alternativa na qualidade de vida pela otimização do conforto térmico

open access: yesarq.urb
A cada dia, cresce a busca por edificações que sejam aliadas a conceitos de reutilização de materiais, desempenho e qualidade no conforto térmico de um ambiente construído. Considerando esses parâmetros, o objetivo deste trabalho é comparar o desempenho
Elson Eduardo de Oliveira Paulo   +1 more
doaj   +1 more source

The Role of River Flooding as an Environmental Filter for Amazonian Butterfly Assemblages

open access: yesFrontiers in Ecology and Evolution, 2021
Amazonian flooded (várzea) and upland (terra firme) forests harbor distinct assemblages of most taxonomic groups. These differences are mainly attributed to flooding, which may affect directly or indirectly the persistence of species.
Rafael M. Rabelo   +7 more
doaj   +1 more source

Limitações nutricionais de dois solos de várzea do Estado de São Paulo para o cultivo do Cudzu-tropical

open access: yesBoletim de Indústria Animal, 2014
Estudaram-se, em casa de vegetação do Instituto de Zootecnia, em Nova Odessa, SP, as principais deficiências nutricionais de solos de várzeas de Pindamonhangaba e Nova Odessa que limitam o estabelecimento, produção e fixação de nitrogênio em Puerarja phaseoloides (R.) Benth.
Maria Tereza Colozza   +3 more
openaire   +8 more sources

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