Results 21 to 30 of about 164 (105)

Ponderação de variáveis de índice trófico com aplicação em reservatórios no semiárido brasileiro [PDF]

Revista DAE
Neste estudo foram investigados 14 reservatórios no estado do Ceará, Nordeste do Brasil, utilizando dados anuais de monitoramento (2013 a 2020) sobre a qualidade da água.
Carlos Hugo Campos Camacho, Luciane Mara Cardoso Freitas, Gustavo Ross Ribeiro Lima, Andrea Limaverde de Araújo, Fernando José Araújo da Silva   +4 more
doaj   +1 more source

Fluctuating asymmetry in spider‐hunting wasps as a possible indicator of stress in Brazilian Atlantic Forest landscapes Assimetria flutuante em vespas caçadoras de aranhas como possível indicador de estresse em paisagens da Mata Atlântica brasileira

Ecological Entomology, Volume 51, Issue 3, Page 558-569, June 2026.
Agricultural cover was positively associated with fluctuating asymmetry in Trypoxylon opacum, suggesting a possible increase in developmental instability in intensively managed landscapes. Wing size was positively related to forest cover and negatively related to agricultural cover, indicating that forested landscapes may promote larger body size ...
Luana Vieira Carlin dos Santos, Jean Pablo Alves de Deus, Milton Cezar Ribeiro, Maria Luisa Tunes Buschini   +3 more
wiley   +1 more source

Sazonalidade e variação espacial do índice de estado trófico do açude Orós, Ceará, Brasil.

Agro@mbiente On-line, 2014
Objetivou-se com o presente trabalho avaliar a qualidade das águas do açude Orós, estudando os atributos físicoquímicos e biológicos quanto à sua contribuição para com o processo de eutrofização, bem como identificar o nível trófico das águas usando o ...
Adriana Alves Batista, Ana Célia Maia Meireles, Eunice Maia de Andrade, Naiara Sâmia de Caldas Izidio, Fernando Bezerra Lopes   +4 more
doaj   +1 more source

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

People 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, Guilherme O. Longo, Luiza S. Waechter, Mariana Bender, Filipe M. França   +4 more
wiley   +1 more source

Use of species’ responses to cryptic anthropogenic disturbances for monitoring biodiversity outcomes in tropical forests

Conservation Biology, Volume 40, Issue 2, April 2026.
Abstract Measuring area‐based conservation outcomes in tropical forests is challenging due to cryptic human disturbances (e.g., hunting). As a result, comparative studies of management strategies providing quantitative outcomes remain scarce, especially in the Neotropics.
Lucy Perera‐Romero, Roan McNab, Rony Garcia‐Anleu, John Polisar, Chris Sutherland, Daniel Thornton   +5 more
wiley   +1 more source

Dietary resilience of coral reef fishes to habitat degradation

Journal of Animal Ecology, Volume 95, Issue 3, Page 397-417, March 2026.
Metabarcoding of gut contents shows that two common benthic‐feeding reef fishes with different feeding stratgies—a butterflyfish (Chaetodon capistratus) and a hamlet (Hypoplectrus puella)—shift diets on degraded reefs. These shifts mirror contrasting patterns in body condition: butterflyfish showed strong individual variation, whereas condition was ...
Friederike Clever, Richard F. Preziosi, Bryan Nguyen, Brígida De Gracia, Helio Quintero Arrieta, W. Owen McMillan, Andrew H. Altieri, Aaron O'Dea, Nancy Knowlton, Matthieu Leray   +9 more
wiley   +1 more source

Aquatic microalgae of the colombian Amazon

Biota Colombiana, 2000
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Santiago R. Duque, Marcela Núñez-Avellaneda   +1 more
doaj   +1 more source

Seasonal and Within‐Day Variation on Hummingbirds Visits and Dominance Hierarchy in a Brazilian Cerrado Area

Austral Ecology, Volume 51, Issue 3, March 2026.
ABSTRACT Plant‐hummingbird interaction networks can be influenced by environmental conditions and resources, which vary seasonally and daily. We aimed to understand how variations in these parameters across these two temporal windows influence patterns of plant‐hummingbird interactions and hummingbirds dominance hierarchies in a Brazilian Cerrado ...
Jeane Lima‐Passos, Andréa Cardoso Araujo, Camila Silveira Souza, Caio Graco Machado   +3 more
wiley   +1 more source

Patch and Landscape Predictors of Mammal Diversity and Their Trait‐Relationships in the Largest Atlantic Forest Island in Brazil

Biotropica, Volume 58, Issue 2, March 2026.
Urbanization and habitat fragmentation reshape mammal communities on Santa Catarina Island, one of the largest Atlantic Forest islands in Brazil. Using camera traps across protected forest patches, we show that species richness declines with urban and unvegetated matrices, while abundance increases in smaller and more isolated fragments dominated by ...
Camila Rezende Ayroza, Barbara Lima‐Silva, Maurício Eduardo Graipel, José Salatiel Pires, Juliano A. Bogoni, Ana Filipa Palmeirim, Manoel dos Santos Filho   +6 more
wiley   +1 more source

Relaciones tróficas del pez ángel (Squatina guggenheim) en el Golfo San Matías, Río Negro, Argentina

Marine and Fishery Sciences
El pez ángel Squatina guggenheim ha sido históricamente capturado como fauna acompañante y desembarcado en la pesquería de merluza común Merluccius hubbsi y, a partir de 2013, también en la de langostino Pleoticus muelleri en el Golfo San Matías (GSM ...
Florencia N. Fernández Chert, Matías Ocampo Reinaldo, Matías N. Suarez, Marina N. Coller   +3 more
doaj   +1 more source