Results 71 to 80 of about 207,215 (337)

Shifts in Bird Migration Timing in North American Long-Distance and Short-Distance Migrants Are Associated with Climate Change

International Journal of Zoology, 2017
Bird migration is a synchronized event that has evolved over thousands of years. Changing temperatures due to climate change threaten the intricacies of migration timing for birds; however, the extent of these changes has only recently begun to be ...
Jay Zaifman, Daoyang Shan, Ahmet Ay, Ana Gabriela Jimenez   +3 more
doaj   +1 more source

Global analysis of threat status reveals higher extinction risk in tropical than in temperate bird sister species [PDF]

, 2019
Given increasing pressures upon biodiversity, identification of species’ traits related to elevated extinction risk is useful for more efficient allocation of limited resources for nature conservation.
Reif, Jiří, Štěpánková, Klára
core   +2 more sources

Smart Bioinspired Material‐Based Actuators: Current Challenges and Prospects

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
This work gathers, in a review style, an extensive and comprehensive literature overview on the development of autonomous actuators based on synthetic materials, bringing together valuable knowledge from several studies. Furthermore, the article identifies the fundamental principles of actuation mechanisms and defines key parameters to address the size
Alejandro Palacios, Léon Chiriatti, Simon Poppinga, Thomas Speck, Vincent Le Houérou   +4 more
wiley   +1 more source

Differences in phenology across three trophic levels between two Afrotropical sites separated by four degrees latitude

Ecology and Evolution
Birds time their life cycle events to favourable windows in environmental conditions. In tropical environments, where photoperiod variation is small, birds show high variability in the timing of life cycle stages, yet these species have been severely ...
Crinan Jarrett, Ojodomo Godday Simon, Christian N. Tchana, Thaddeus Apezan Pev, Michelle Fany Meigang Kamkeng, Alain Christel Wandji, Shiiwua A. Manu, Mélanie Adèle Tchoumbou, Barbara Helm, Luke L. Powell, Chima J. Nwaogu   +10 more
doaj   +1 more source

Seasonal changes in moult, body mass and reproductive condition in siskins Carduelis spinus exposed to daylength regimes simulating different latitudes [PDF]

, 2011
Birds use change in daylength during the year to time events during their annual cycles. Individual Eurasian siskins Carduelis spinus can breed and winter in widely separated areas in different years.
Dawson, Alistair, Newton, Ian
core   +2 more sources

Compact Modeling of Volatile‐Switching Electrochemical Metallization Memory Cells by Means of the Electromotive Force

Advanced Intelligent Systems, EarlyView.
A volatile‐switching compact model of electrochemical metallization memory cells for neuromorphic architecture is developed and validated by reliable reproduction of device characterization measurements: I−V sweeps, SET kinetics, relaxation dynamics.
Rana Walied Ahmad, Solomon Amsalu Chekol, Julius Rasbach, Susanne Hoffmann‐Eifert, Stephan Menzel   +4 more
wiley   +1 more source

Statistical analysis of trajectories on Riemannian manifolds: Bird migration, hurricane tracking and video surveillance

, 2014
We consider the statistical analysis of trajectories on Riemannian manifolds that are observed under arbitrary temporal evolutions. Past methods rely on cross-sectional analysis, with the given temporal registration, and consequently may lose the mean ...
Klassen, Eric, Kurtek, Sebastian, Srivastava, Anuj, Su, Jingyong   +3 more
core   +1 more source

Prioritizing global conservation of migratory birds over their migration network [PDF]

, 2023
Wenyuan Zhang, Jie Wei, Yanjie Xu
openalex   +1 more source

Evaluating the African arid corridor hypothesis: A meta‐analysis including the phylogenetic and biogeographical history of Sesamothamnus

American Journal of Botany, EarlyView.
Abstract Premise We examined the African arid corridor (AAC) disjunction pattern of vascular plants between northeastern and southwestern Africa in the context of geological and climatic events since the late Miocene. We developed a phylogenetic and biogeographical framework for the arid‐adapted genus Sesamothamnus (Pedaliaceae), a classic example of ...
John G. Zaborsky, Jeffrey P. Rose, Ricardo Kriebel, Bryan T. Drew, Emily Moriarty Lemmon, Alan R. Lemmon, Kenneth J. Sytsma   +6 more
wiley   +1 more source

Influence of forest stand structure on the occurrence of bird community in Skalná Alpa National Nature Reserve in the Veľká Fatra Mts. (West Carpathians)

Journal of Forest Science, 2004
The study deals with the influence of the structure, texture and dynamics of a spruce-beech primeval forest on the bird community in Skalná Alpa National Nature Reserve in the Veľká Fatra Mts. (West Carpathians, Slovakia) in the years 1982-2002.
M. Saniga, M. Saniga
doaj   +1 more source