Results 21 to 30 of about 510 (81)

Characterisation of Drought and Wet Events in the Paraíba do Sul River Basin—Brazil

International Journal of Climatology, Volume 46, Issue 9, July 2026.
Trend analysis identified statistically significant reductions in precipitation (at the 5% significance level) at specific pluviometric stations in São Paulo and Rio de Janeiro, while other areas, mainly in Minas Gerais, experienced significant increases in annual and seasonal rainfall, particularly during summer and spring. These significant trends at
Gildo Rafael de Almeida Santana, Eliane Barbosa Santos, Maria Gertrudes Alvarez Justi da Silva, Vicente de Paulo Santos de Oliveira, Jader Lugon Junior   +4 more
wiley   +1 more source

Comentários sobre a distribuição geográfica de Astyanax altiparanae Garutti & Britski, 2000 (Osteichthyes, Characidae) na bacia do rio Iguaçu

Acta Scientiarum: Biological Sciences, 2008
Garutti (1995) fez a revisão de algumas espécies de Astyanax (Osteichthyes, Characidae) e aquela, conhecida como “tambiú” na bacia do alto rio Paraná, anteriormente identificada como Astyanax bimaculatus, foi considerada nova e posteriormente descrita ...
Weferson Júnio da Graça, Carla Simone Pavanelli   +1 more
doaj   +1 more source

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

New 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, Niall P. McNamara, Dafydd M. O. Elias, Carla Gomez, Jack Lamb, Rodrigo Nunes de Sousa, Darlene Gris, Leonardo Pequeno Reis, Alison M. Hoyt, Sunitha Rao Pangala   +9 more
wiley   +1 more source

Shifting Seas, Changing Diets: Evidence of Temporal Dietary Shifts in Marine Megafauna in Southern Brazil (2017–2023)

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.
ABSTRACT Understanding the dietary dynamics of marine megafauna is essential for interpreting ecological interactions and assessing environmental changes in marine ecosystems. We analysed temporal trends in the diets of eight megafaunal species, comprising marine mammals, seabirds, and sea turtles.
Joao Bosco Gusmao, Mario Roberto Castro Meira‐Filho, Camila Domit   +2 more
wiley   +1 more source

INVENTÁRIO DE ÁREAS ÚMIDAS DA BACIA HIDROGRÁFICA DO RIO SANTA MARIA, NA MICRORREGIÃO DO VÃO DO PARANÃ: “O PANTANAL” DE GOIÁS

Boletim Goiano de Geografia
As áreas úmidas são ecossistemas na interface entre ambientes terrestres e aquáticos e, no Cerrado, elas compreendem um mosaico de vegetações hidrófilas, savanas alagáveis e manchas de florestas alagáveis e secas. Em Goiás, verifica-se que as maiores concentrações de áreas naturais do bioma, estão presentes no norte e nordeste do estado, sobretudo na ...
Ana Elisa de Lima Oliveira, Maximiliano Bayer   +1 more
openaire   +1 more source

Fish distribution across altitudinal gradients in the Upper Paraguay River Basin: Implications for conservation in the Pantanal region

Conservation Science and Practice, Volume 7, Issue 7, July 2025.
This paper approaches the patterns in fish distribution across the altitudinal gradient in the Upper Paraguay River basin, from uplands to the floodplain. We compiled more than 75,000 available fish records and registered 342 fish species and your distribution along altitudinal gradient. Floodplain portion have higher species diversity than headwaters,
Adriana Maria Espinoza Fernando, Francisco Severo‐Neto, Fabiane Silva Ferreira, Lúcia Mateus, Karina K. Tondato‐Carvalho, Elaine Antoniassi Luiz Kashiwaqui, Heriberto Gimenes Junior, Wladimir M. Domingues, Carla Simone Pavanelli, Henrique Ledo Lopes Pinho, Jerry Penha, Yzel Rondon Súarez   +11 more
wiley   +1 more source

Fire Effects on Bird Communities From Seasonally Flooded Forests Along Amazonian Black Water Rivers of the Negro River Basin

Diversity and Distributions, Volume 31, Issue 5, May 2025.
ABSTRACT Aim Fire significantly contributes to Amazonian degradation, with igapó forests (seasonally flooded by blackwater rivers) being especially vulnerable. Igapó forests support species adapted to seasonal flooding, making fire a critical threat to these specialised organisms.
C. Valentim, J. M. G. Capurucho, P. E. D. Bobrowiec, G. A. Leite, G. M. Martins, J. Schöngart, C. C. Ribas   +6 more
wiley   +1 more source

Fósseis do Devoniano de Goiás, Brasil (Sub-bacia Alto Garças, Bacia do Paraná)

Papéis Avulsos de Zoologia
RESUMO O registro fóssil do Devoniano do estado de Goiás (Sub-bacia Alto Garças, Bacia do Paraná) é ocorrente nos arredores de diversas cidades como Amorinópolis, Iporá, Caiapônia, Rio Verde e Doverlândia. Contudo, os fósseis encontrados em Goiás são, em
Fábio Augusto Carbonaro, Renato Pirani Ghilardi   +1 more
doaj   +1 more source

Estudo preliminar sobre a hidroquímica da bacia de Jací-Paraná (RO) [PDF]

Acta Amazonica, 1987
O Projeto Estudo de uma Bacia Experimental em Jaci-Paraná (RO), tem como um dos seus objetivos o estudo hidroquímico do rio e igarapés da área. Neste trabalho são apresentados os resultados dos parâmetros físico-químicos pH, condutibilidade elétrica ...
Umberto de Menezes Santos, Maria de Nazaré Góes Ribeiro, Antonio Carlos F. N. S. Tancredi   +2 more
doaj   +1 more source

Toward effective river restoration in Brazil: a systematic review of current practices, regional disparities, and success metrics

Restoration Ecology, Volume 33, Issue 4, May 2025.
Freshwater ecosystems in Brazil face critical threats from urbanization, industrialization, and agricultural expansion, leading to biodiversity loss and diminished ecosystem services. Restoration efforts are essential, yet a systematic overview of their distribution, objectives, and success metrics is lacking.
Rafael H. Hordones, Iola G. Boëchat, Davi G. F. Cunha, Mario Brauns, Björn Gücker   +4 more
wiley   +1 more source