Results 71 to 80 of about 195,308 (340)

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

Unprecedented Migratory Bird Die‐Off: A Citizen‐Based Analysis on the Spatiotemporal Patterns of Mass Mortality Events in the Western United States

GeoHealth, 2021
Extensive, severe wildfires, and wildfire‐induced smoke occurred across the western and central United States since August 2020. Wildfires resulting in the loss of habitats and emission of particulate matter and volatile organic compounds pose serious ...
Di Yang, Anni Yang, Jue Yang, Rongting Xu, Han Qiu   +4 more
doaj   +1 more source

Bird Migration—I [PDF]

Scientific American, 1916
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openaire   +1 more source

Voltage‐Summation‐Based Compute‐in‐Memory Technology with Capacitive Synaptic Devices

Advanced Intelligent Systems, EarlyView.
Compute‐in‐memory (CIM) technologies leveraging capacitive coupling offer significant advantages in energy efficiency and IR‐drop elimination. This work introduces voltage‐summation‐based CIM technology, employing capacitive synaptic devices for matrix–vector multiplication.
Jung Nam Kim, Yong Woo Kim, Boram Kim, Doo‐Hyun Kim, Gil Sung Lee, Dong‐Hyuk Chae, Minkyu Je, Minsuk Koo, Yoon Kim   +8 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

Challenging claims in the study of migratory birds and climate change [PDF]

, 2011
Recent shifts in phenology in response to climate change are well established but often poorly understood. Many animals integrate climate change across a spatially and temporally dispersed annual life cycle, and effects are modulated by ecological ...
Bach, Lars A., Both, Christiaan, Coppack, Timothy, Ergon, Torbjorn, Ergon, Torbjørn, Gienapp, Phillip, Gill, Jennifer A., Gordo, Oscar, Hedenstrom, Anders, Hedenström, Anders, Jonzen, Niclas, Knudsen, Endre, Lehikoinen, Esa, Linden, Andreas, Marra, Peter P., Moller, Anders P., Møller, Anders P., Nilsson, Anna L. K., Peron, Guillaume, Pulido, Francisco, Ranta, Esa, Rubolini, Diego, Saether, Stein A., Saino, Nicola, Sparks, Tim H., Spina, Fernando, Stenseth, Nils Chr., Studds, Colin E., Sutherland, William J., Tryjanowski, Piotr   +29 more
core   +4 more sources

The interplay among space, environment, and gene flow drives genetic differentiation in endemic Baja California Agave sobria subspecies

American Journal of Botany, EarlyView.
Abstract Premise Research on neutral and adaptive processes that lead to the divergence of species and populations is a crucial component in evolutionary and conservation genetics. Agave sobria is an endemic group of subspecies scattered on canyons along a latitudinal gradient and distinct environments of the Baja California Peninsula, Mexico.
Anastasia Klimova, Jesús Gutiérrez Rivera, Oscar E. Juárez, Alfredo Ortega Rubio, Luis E. Eguiarte   +4 more
wiley   +1 more source

Stable isotope ratios indicate that body condition in migrating passerines is influenced by winter habitat [PDF]

, 2004
Although predicted some time ago, there has been little success in demonstrating that the overall fitness of migratory birds depends on the combined influences of their experiences over all seasons.
Bearhop, S., Hilton, G.M., Votier, S.C., Waldron, S.   +3 more
core   +1 more source

Review of the anatomical basis for predicting plutonium alpha particle radiation induced osteogenic cancers

The Anatomical Record, EarlyView.
Abstract Plutonium was discovered and first synthesized in the early 1940's. Several isotopes of plutonium are used in nuclear technologies, 238Pu for heat generation and 239Pu for energy production and weapons. Both isotopes emit alpha particles, which pose a significant radiation hazard when incorporated into the body.
Scott C. Miller
wiley   +1 more source

Bird Migration Through A Mountain Pass Studied With High Resolution Radar, Ceilometers, And Census [PDF]

, 2001
Autumnal migration was studied with high-resolution radar, ceilometer, and daily census in the area of Franconia Notch, a major pass in the northern Appalachian Mountains.
Stokstad, P., Williams, J. M., Williams, P. G., Williams, Timothy C., , \u2764   +3 more
core   +2 more sources