Results 41 to 50 of about 1,860 (171)

Record phenological responses to climate change in three sympatric penguin species

open access: yesJournal of Animal Ecology, Volume 95, Issue 3, Page 455-469, March 2026.
This paper is impressive because we managed to monitor extensively a really difficult place to reach and operate in. We deployed 77 cameras across Antarctica and the Sub Antarctic islands to monitor three different species of penguins. We found that they are the fastest advancing vertebrates with respect to their timing of breeding.
Ignacio Juarez Martinez   +8 more
wiley   +1 more source

Social media highlights the overlooked impact of cats on arthropods

open access: yesInsect Conservation and Diversity, Volume 19, Issue 2, Page 460-465, March 2026.
The impact of domestic cats on vertebrate biodiversity is unequivocal; however, we still know little about their effects on arthropods. By analysing over 17,000 photos and videos from social media platforms (iStock and TikTok), we documented 550 predation events of cats on arthropods.
Leticia Alexandre, Raul Costa‐Pereira
wiley   +1 more source

Hábitos alimentarios del Puma concolor (Carnivora: Felidae) en el Parque Nacional Natural Puracé, Colombia

open access: yesRevista de Biología Tropical, 2011
La dieta de Puma concolor es ampliamente conocida a lo largo de su distribución, sin embargo, en Colombia no se ha realizado ningún estudio sobre sus hábitos alimentarios.
Andrés Hernández-Guzmán   +2 more
doaj   +2 more sources

Los ríos que nos unen

open access: yesEntretextos, 2014
El debate público e internacional se dio debido a las luchas de comunidades afectadas directamente, quienes denunciaban su falta de participación en la toma de decisiones frente a los proyectos que se implementaban en sus territorios y, por otro lado ...
Mónica Montalvo Méndez
doaj   +1 more source

Presa Kariba

open access: yesInformes de la Construcción, 1958
La Federación de los países de Rodesia y Niasa ha emprendido la construcción de la presa bóveda Kariba, que utilizará las aguas del caudaloso rio sudafricano Zambeza antes de entrar en el vecino territorio de Mozambique. La altura máxima de la presa será de 128 m, la potencia hidroeléctrica prevista es de 100.000 kw, dos centrales subterráneas y un ...
openaire   +4 more sources

Ungulate prey availability to inform Mexican wolf recovery within its historical range

open access: yesThe Journal of Wildlife Management, Volume 90, Issue 2, February 2026.
We estimated the potential ecological carrying capacity for the Mexican wolf based exclusively on ungulate prey biomass estimated from camera trap surveys. In the United States, the potential density estimate is high (21.4–52.7 wolves/1,000 km2) owing to the presence and relatively high densities of elk, mule deer, and white‐tailed deer.
Alejandro González‐Bernal   +6 more
wiley   +1 more source

Size Effects of TiO2 Nanoparticles as Supports for W‐ and NiW‐Catalysts for Selective 3‐Methylthiophene Desulfurization

open access: yesChemCatChem, Volume 18, Issue 1, 15 January 2026.
Rounded TiO2 nanoparticles we sucesfully synthesized with modulated sizes from 109 to 22 nm. We observed the WS2 and NiWS active phases forming parallel slabs to the surface. The presence of Ni helped W to be better dispersed, especially on the smallest nanoparticles, which resulted in the highest activity detected among the series.
Eduardo D. Gutiérrez‐López   +7 more
wiley   +1 more source

Análisis dinámico de presas térreas: 2a. parte

open access: yesIngeniería e Investigación, 1984
Como se indicó anteriormente, para este análisis se utilizó el programa de computador ELAS; los resultados de estos análisis se muestran en las figuras, donde se presentan el esfuerzo principal mayor, la relación de esfuerzos principales y el esfuerzo ...
Edgar Rodríguez G.   +2 more
doaj  

Conceptos básicos en presas

open access: yesCiencia e Ingeniería Neogranadina, 2001
El agua es un elemento esencial para cualquier forma de vida, y alrededor de ésta se formaron las grandes comunidades y civilizaciones del mundo. El hombre primitivo ideó recipientes para almacenar el agua; cuando se hizo sedimentario y agricultor se ...
Luz Elena Santaella Valencia   +1 more
doaj   +1 more source

Alkynes Hydration in Three‐Component Double‐Acidic Deep Eutectic Solvents

open access: yesChemSusChem, Volume 19, Issue 1, January 2026.
All‐in‐one solution! Novel three‐component double‐acidic deep eutectic solvents (DESs) enable the regioselective hydration of both terminal and internal alkynes to afford the corresponding ketones. The key factor is the triple activity of the DES: solvent, reagent, and catalyst.
Alessandra Gritti   +5 more
wiley   +1 more source

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