Results 181 to 190 of about 91,826 (356)

Colours of urban selection: carotenoid‐based signals reveal divergent urban/rural evolutionary trajectories in two closely related passerines

open access: yesOikos, EarlyView.
Urbanisation is a major driver of environmental change, reshaping ecological and evolutionary processes. Urban‐driven phenotypic differences are increasingly documented, but the underlying role of selection is still understudied. One pattern is the consistent reduction of carotenoid‐based plumage pigmentation in city birds.
Nicolas Bekka   +3 more
wiley   +1 more source

Predators and scavengers: Polar bears as marine carrion providers

open access: yesOikos, EarlyView.
Scavenging is a foraging strategy widely used across the animal kingdom and apex predators provide a large amount of energy in a food web by provisioning carrion. In the harsh environmental conditions of the Arctic, apex predators such as polar bears Ursus maritimus can provide scavenging opportunities for many species. Carrion can act as a buffer when
Holly E. L. Gamblin   +5 more
wiley   +1 more source

Friends or foes? Polyploidy and competition in a grassland geophyte

open access: yesOikos, EarlyView.
Previous studies have suggested polyploids may possess a competitive advantage over diploids, due to their larger size, increased vigour or ability to better respond to abiotic stress. However, few studies have tested the effect of polyploidy on competitive ability directly, and only relatively recently has this oversight begun to be addressed. Here we
Damian Vaz de Sousa   +3 more
wiley   +1 more source

Disturbance by massive sporting events in mountain areas: When and where matters for the protected Alpine ibex Capra ibex

open access: yesPeople and Nature, EarlyView.
Abstract The ongoing development of recreational activities in natural areas raises concerns about their environmental impacts, particularly in mountain ecosystems. Those biodiversity hotspots are highly attractive for outdoor activities, but they are also highly sensitive to human disturbance.
Pascal Marchand   +3 more
wiley   +1 more source

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