Results 21 to 30 of about 8,422 (237)

Linking Socioeconomics to Biodiversity in the City: The Case of a Migrant Keystone Bird Species

Frontiers in Ecology and Evolution, 2022
Billions of wild animals migrate every year between breeding and non-breeding sites, facing new environmental conditions due to anthropogenic change. Although cities engender profound environmental changes, they provide habitat for some migratory birds ...
Nélida R. Villaseñor, Nélida R. Villaseñor, Martín A. H. Escobar   +2 more
doaj   +1 more source

Early stages of speciation with gene flow in the Amazilia Hummingbird (Amazilis amazilia) subspecies complex of Western South America

Ecology and Evolution, 2022
Disentangling the factors underlying the diversification of geographically variable species with a wide geographical range is essential to understanding the initial stages and drivers of the speciation process. The Amazilia Hummingbird, Amazilis amazilia,
Sarah A. Cowles, Christopher C. Witt, Elisa Bonaccorso, Felix Grewe, J. Albert C. Uy   +4 more
doaj   +1 more source

Effects of a snowstorm event on the interactions between plants and hummingbirds: fast recovery of spatio-temporal patterns

Revista Mexicana de Biodiversidad, 2011
The global climatic change could cause, in some places, appearance of meteorological phenomena considered rare. If we understand the effect of these phenomena on birds we can understand how birds respond to weather changes. We report here the effect of a
Román Díaz-Valenzuela, Raúl Ortiz-Pulido   +1 more
doaj   +1 more source

Hovering hummingbird wing aerodynamics during the annual cycle. II. Implications of wing feather moult [PDF]

Royal Society Open Science, 2018
Birds usually moult their feathers in a particular sequence which may incur aerodynamic, physiological and behavioural implications. Among birds, hummingbirds are unique species in their sustained hovering flight.
Yonathan Achache, Nir Sapir, Yossef Elimelech   +2 more
doaj   +1 more source

Early detection of Alzheimer’s disease using small RNAs. Results from the EPAD cohort

The Journal of Prevention of Alzheimer's Disease
Background: Alzheimer's disease (AD) is the most common form of dementia, and early diagnosis is crucial to enable effective interventions. Currently, Alzheimer's disease is diagnosed through cognitive assessments, brain imaging and fluid biomarkers ...
Tobias Sikosek, Marco Heuvelman, Jagoda Mika, Mustafa Kahraman, Julia Jehn, Maurice Frank, Alberto Daniel-Moreno, Jessika Ceiler, Jasmin Skottke, Marta Sanchez-Delgado, Patrick Neubert, Christina Rudolf, Kaja Tikk, Rastislav Horos, Jeffrey L. Cummings, Josie Butchart, Craig Ritchie, Jean Manson, Bruno R. Steinkraus   +18 more
doaj   +1 more source

In Situ Liquid‐Cell Transmission Electron Microscopy Insights Into Lithium‐Ion Battery Materials Degradation: Challenges and Emerging Solutions

Advanced Science, EarlyView.
Lithium‐ion battery degradation arises from complex, localized processes during operation, limiting long‐term performance. In situ electrochemical liquid cell TEM provides unique access to these mechanisms. This review summarizes degradation phenomena revealed by liquid cell TEM, traces the evolution of the three main cell designs, compares their ...
Walid Dachraoui, Rolf Erni
wiley   +1 more source

From Origami to Bistable and Laminate Structures: A Review for Multifunctional Applications from Structural Perspective of Shape‐Changing Structures

Advanced Intelligent Systems, EarlyView.
This review explores how shape‐changing structures—origami, bistable, and laminate structures—enable multifunctionality in soft robotics and metamaterials. Starting from structural design, it examines core principles, real‐world applications, and ongoing challenges.
Lingchen Kong, Yaoyao Fiona Zhao
wiley   +1 more source

Many Central American hummingbirds can be aged and sexed by molt patterns and bill corrugations

Journal of Field Ornithology, 2023
We document molt extent; age-specific molt patterns, plumages, and percent of the bill with corrugations; the presence or absence of delayed plumage maturation and bill color changes in males of some species; and molt timing in the 19 resident ...
Blaine H Carnes, Abidas Ash
doaj   +1 more source

Comparative Neuromechanical Wing‐Actuation Architectures of Flapping Flight in Insects, Hummingbirds, and Robots

Advanced Intelligent Systems, EarlyView.
Natural fliers achieve remarkable aerial performance through diverse wing neuromechanical systems integrating actuation, sensing, and control. This study synthesizes neuromechanical architectures in insects and hummingbirds, identifying two key functional types‐Dual Neural‐Mechanical Oscillator and Neurally‐modulated Mechanical Oscillator‐ and ...
Suyash Agrawal, Jean‐Michel Mongeau, Bret W. Tobalske, Christopher Rahn, Bo Cheng   +4 more
wiley   +1 more source

Indigenous internationalization: Indigenous worldviews, higher education, and Tribal Colleges and Universities

Education Policy Analysis Archives, 2019
This article examines the role of Indigenous knowledges in higher education through an exploration of internationalization at U.S. Tribal Colleges and Universities (TCUs).
Elizabeth Alva Sumida Huaman, Belinda Chiu, Carrie Billy   +2 more
doaj   +1 more source