Results 21 to 30 of about 1,210 (117)

Spatial and seasonal changes in the diet of Oligosarcus hepsetus (Characiformes, Characidae) in a Brazilian Reservoir Variações espaciais e sazonais na dieta de Oligosarcus hepsetus (Characiformes, Characidae) em um reservatório brasileiro

Brazilian Journal of Biology, 2005
We assessed spatial and seasonal changes in the diet of Oligosarcus hepsetus in order to describe the strategy developed by this species that allows their very high abundance in Lajes reservoir, Rio de Janeiro, Brazil.
F. G Araújo, C. C Andrade, R. N Santos, A. F. G. N Santos, L. N Santos   +4 more
doaj   +1 more source

Inorganic carbon shortage may limit the development of submersed macrophytes in habitats of the Paraná River basin Baixas concentrações de carbono inorgânico podem limitar o desenvolvimento de macrófitas submersas em habitats do alto rio Paraná

Acta Limnologica Brasiliensia, 2011
AIM: In this investigation we carried out an experiment to assess whether the growth of Egeria najas and E. densa (two rooted submersed Hydrocharitacea, native to South America) are limited by inorganic carbon or not; METHODS: We measured the early plant
Aline de Freitas, Sidinei Magela Thomaz
doaj   +1 more source

Systematics of Marmosa Subgenus Micoureus With Emphasis in ‘rapposa’ Group (Didelphidae, Marmosini): Geographic Variation and Revalidation of M. budini

Zoologica Scripta, Volume 55, Issue 5, Page 681-692, September 2026.
ABSTRACT Micoureus is the most species‐rich subgenus within the genus Marmosa. Conflicting arrangements regarding the number of species comprising this subgenus have been proposed and the validity of M. budini has been debated. Here, we used an approach integrating genetic and morphological data were conducted to reanalyze the ‘rapposa’ group ...
Maria Clara Santos Ribeiro, Aldo Caccavo, Joyce Rodrigues do Prado, Cibele Rodrigues Bonvicino   +3 more
wiley   +1 more source

Trapped in the web: network architectures spread coevolution and shape adaptation

Oikos, Volume 2026, Issue 7, July 2026.
Adaptation is critical for biodiversity to persist under global change. Within ecological communities, species often face tradeoffs between adapting to shifting abiotic conditions and navigating the complex selective pressures imposed by interaction networks.
Alexandre Fuster‐ Calvo, Cecilia S. Andreazzi, Christine Parent, François Massol, Paulo R. Guimarães Jr, Dominique Gravel   +5 more
wiley   +1 more source

Bee community assembly is regulated by functional traits in pristine tropical forest environments

Functional Ecology, Volume 40, Issue 7, Page 2102-2113, July 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Understanding the drivers of bee beta diversity across pristine environments in the Amazon is critical for ensuring biodiversity conservation, restoration, sustainable land use planning and economic development.
Rafael Cabral Borges, Erlane José Cunha, Ulysses Madureira Maia, Lourival Tyski, José Eustáquio dos Santos Júnior, Carlos Eduardo Pinto, Markus Gastauer, Tereza Cristina Giannini   +7 more
wiley   +1 more source

Integration between experimental investigation and numerical simulation of alkaline surfactant foam flooding in carbonate reservoirs

Journal of Petroleum Exploration and Production Technology
In Brazil, pre-salt carbonate reservoirs are largely responsible for the current increase in oil production. However, due to its peculiar characteristics, increasing oil recovery by water injection is not enough.
João Victor Gois Silva, Bruno Marco Oliveira Silveira, Jean Vicente Ferrari, Marcio Augusto Sampaio   +3 more
doaj   +1 more source

Environmental detection of the amphibian chytrid fungus in water bodies is associated with host infection along a deforestation gradient

Journal of Applied Ecology, Volume 63, Issue 7, July 2026.
Linking environmental pathogen detection with host infection patterns can improve surveillance of diseases involving environmental transmission, particularly where direct host sampling is logistically challenging. This approach enables the identification of areas of elevated transmission risk and supports targeted monitoring and management under ...
Ananda Brito de Assis, David Rodriguez, Wesley J. Neely, Carla Martins Lopes, Paula R. Prist, Carlos Arturo Navas, Renato A. Martins, Shannon Buttimer, Célio Fernando Baptista Haddad, C. Guilherme Becker   +9 more
wiley   +1 more source

Analysis of optical proprieties of the water reservoir Rodolfo Costa e Silva – Itaara, RS, Brazil, with field spectral data and orbital multispectral images

Revista Ambiente & Água, 2007
An evaluation of the discrimination of water classes using continuum removal technique applied over spectral data obtained in field and multispectral images classification is presented.
Waterloo Pereira Filho, Flávio Wachholz, Fábio Marcelo Breunig, Conrado de Moraes Rudorff   +3 more
doaj   +1 more source

Host–Parasite Interaction Networks of Helminths of Sigmodontine Rodents in Two Different Areas of the Brazilian Atlantic Forest

Ecological Research, Volume 41, Issue 3, May 2026.
Two helminth‐rodent networks were analyzed for two distinct areas. Network modularity, nestedness, and degree of specialization were calculated for each network. Higher network modularity than nestedness and high network specialization were observed in both networks, suggesting functional and/or taxonomic specialization between helminth species and ...
Thiago dos Santos Cardoso, Natália Alves Costa, Socrates Fraga da Costa‐Neto, Gabriel Alves dos Santos Attanazio, Martín Roberto del Valle Alvarez, Arnaldo Maldonado Junior, Cecilia Siliansky de Andreazzi, Rosana Gentile   +7 more
wiley   +1 more source

Ocorrência de Cianobactérias no Reservatório de Mundaú, no Estado de Pernambuco no Período de Janeiro de 2010 a Novembro de 2011

Vigilância Sanitária em Debate: Sociedade, Ciência & Tecnologia, 2013
As cianobactérias são organismos procariontes, assemelhando-se às bactérias, e realizam fotossíntese com produção de oxigênio, como células vegetais. As florações desses organismos podem causar problemas em mananciais de abastecimento público, pois algumas espécies podem produzir cianotoxinas.
Edvani Maria da Silva, Cícero Tiago da Silva Gomes, Catarina Paula da Silva Ramos, Silvia Maria Lopes Bricio   +3 more
openaire   +2 more sources