Results 141 to 150 of about 47,339 (326)
The European Zoological JournalDuring studies of avian breeding biology, ecology and population dynamics, researchers have to breach nesting territories, which can potentially lead to various disturbances resulting in altered relationships in the predator-prey system.
J. Płóciennik, B. Czyż, L. Hałupka
doaj +1 more source
Radar And Visual Observations Of Autumnal (Southward) Shorebird Migration On Guam [PDF]
, 1988 Several species of shorebirds migrate between eastern Asia and the southern Pacific islands, Australia, and New Zealand. Observations made from Guam (13°25′N, 144°45′E) during autumn 1983 indicate that a significant number of birds take a direct route ...
Williams, J. M. +1 more
core +1 more source
Animal Conservation, EarlyView.Using fecal DNA metabarcoding, we quantified dietary overlap among reintroduced fishers and sympatric coyotes, bobcats, and Pacific martens in Washington's North Cascades. Niche overlap was substantial for common prey but varied with body size, revealing fine‐scale resource partitioning that may limit fishers' access to energetically efficient prey ...
Kayla A. Shively +7 more
wiley +1 more source
Avian Conservation and Ecology, 2010 Long-distance migrants wintering in tropical regions face a number of critical conservation threats throughout their lives, but seasonal estimates of key demographic parameters such as winter survival are rare.
Anna M. Calvert +2 more
doaj
Conservation Biology, EarlyView.Abstract Insectivorous, Afro‐Palearctic migrant birds provide cross‐border ecosystem services, but many are declining rapidly. The complex life cycle of migrant birds makes their conservation difficult, but understanding where they spend time during the breeding season can help indicate where those actions will be most effective.
Catrin F. Eden +5 more
wiley +1 more source
Ecology and EvolutionDietary variation among cohorts can have a major impact on how populations adapt to environmental variation. Although variation in diet between cohorts and across habitats has been studied in many taxa, this is not true for most birds, especially smaller
J. R. Coomes +5 more
doaj +1 more source
Information on bird navigation obtained by British long range radars [PDF]
Radar observations of the migratory habits of passerine birds over a 10 year period are presented. The relationships between intensity of cloud cover and the frequency and density of migration are illustrated.
Evans, P. R.
core +1 more source
Conservation Biology, EarlyView.Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge +2 more
wiley +1 more source
Ecology and EvolutionThe breeding phenology of birds is often timed to coincide with a peak in food availability. However, the shortening of the vegetation period with increasing elevation may force bird species at high elevations to breed earlier in relation to optimal ...
Julia Paterno +4 more
doaj +1 more source
DiversityThe degree to which Grinnellian and Eltonian niche characteristics influence species distribution may depend on latitude. Tropical regions are environmentally stable and resource-rich, whereas temperate regions are comparatively less environmentally ...
Erin E. Stukenholtz, Richard D. Stevens
doaj +1 more source