Results 41 to 50 of about 195,308 (340)

Shifts in vegetation phenology along flyways entail varying risks of mistiming in a migratory songbird

open access: yesEcosphere, 2016
Long‐term shifts in vegetation phenology generally follow the pattern of global warming. Yet, topographical complexity and biome diversity cause uneven spatial trends in the phenological response of vegetation to climate change.
Tamara Emmenegger   +5 more
doaj   +1 more source

The Costs of Freely Granting Specific Performance [PDF]

open access: yes, 1982
For thousands of years the migratory birds has travelled across the earth in the same directions and returns to the same places generation through generation.
Muris, Timothy J.
core   +3 more sources

High individual repeatability of the migratory behaviour of a long-distance migratory seabird

open access: yesMovement Ecology, 2022
Background Understanding the evolution of migration requires knowledge of the patterns, sources, and consequences of variation in migratory behaviour, a need exacerbated by the fact that many migratory species show rapid population declines and require ...
Nathalie Kürten   +6 more
doaj   +1 more source

Associations of Synoptic Weather Conditions With Nocturnal Bird Migration Over the North Sea

open access: yesFrontiers in Ecology and Evolution, 2020
The southern North Sea is part of an important flyway for nocturnal bird migration, but is also risky as it stretches over a large surface of water. Selecting nights with suitable weather conditions for migration can be critical for a bird’s survival ...
Iris Manola   +6 more
doaj   +1 more source

Automatic detection of migrating soaring bird flocks using weather radars by deep learning

open access: yesMethods in Ecology and Evolution, 2023
The use of weather radars to detect and distinguish between different biological patterns greatly improves our understanding of aeroecology and its consequences for our lives.
Inbal Schekler   +3 more
doaj   +1 more source

Arctic Bird Migration Monitoring Protocol [PDF]

open access: yes, 2003
The purpose of this resource is to observe when selected bird species first arrive at your study site, and to count the numbers until few or none of these birds are seen.
The GLOBE Program, University Corporation for Atmospheric Research (UCAR)
core  

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Preserve birds in their natural NZ habitat and save their “Wild Musick”. [PDF]

open access: yes, 2018
The Wild Musick framework has been created to support the Ministry of Business, Innovation and Employment (Tourism) NZ, Department of Conservation, Ministry of Conservation, and Ministry of Youth Development. It works to encourage the youth, and families
Ayesha, Hakim, Prashant, Khanna
core  

Self‐Reinforcing Degradation of Solution‐Processed Small‐Molecule OLEDs: Excited‐States and Molecular Interactions as Key Triggers

open access: yesAdvanced Functional Materials, EarlyView.
Self‐reinforcing degradation in solution‐processed small‐molecule organic light‐emitting diodes (OLEDs) arises from charge accumulation and exciton‐polaron interactions, leading to molecular aggregation and efficiency loss. This study uncovers the fundamental mechanisms behind this degradation and introduces strategic material engineering approaches ...
Eonji Cha   +8 more
wiley   +1 more source

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