Foraging niche dynamics and overlap in a guild of passerine birds in a south Swedish coniferous woodland

Oecologia ◽  
1977 ◽  
Vol 27 (1) ◽  
pp. 23-45 ◽  
Author(s):  
S. Ulfstrand
Keyword(s):  
Passerine Birds ◽  
Niche Dynamics ◽  
Foraging Niche

Inter-colony foraging dynamics and breeding success relate to prey availability in a pursuit-diving seabird

2020 ◽  
Vol 651 ◽  
pp. 183-198
Author(s):  
J Gulka ◽  
E Jenkins ◽  
LD Maynard ◽  
WA Montevecchi ◽  
PM Regular ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Prey Availability ◽  
Anthropogenic Pressures ◽  
Niche Dynamics ◽  
Common Murres ◽  
Distribution Of Resources ◽  
Foraging Niche ◽  
And Behavior ◽  
Foraging Distances ◽  
Adult Diet

Spatial patterns of breeding seabirds are influenced by the distribution of resources in relation to the colony and the density of conspecifics from the same or adjacent colonies. We conducted an inter-colony comparison of foraging space use and behavior, diet, and reproductive success of common murres Uria aalge breeding at a large offshore and a small inshore colony on the northeastern coast of Newfoundland (Canada) during 2016-2018 under varying prey (capelin Mallotus villosus) biomass. Murres from the large offshore colony foraged over a greater area, with greater individual foraging distances, indicative of higher commuting costs compared to the smaller inshore colony. Although this pattern might reflect prey depletion near the offshore colony due to higher conspecific densities, it likely also reflects the greater distance to predictable, high-abundance prey aggregations. This is supported by high spatial overlap of foraging areas from both colonies near coastal, annually persistent capelin spawning sites. Adult diet was similar between colonies during incubation, but diverged during chick-rearing, with offshore murres consuming a higher proportion of alternative prey, while inshore murres consumed more capelin. These differences did not affect fledging success, although hatching success was lower in the larger colony, suggesting that divergent factors (e.g. predation, nest attendance) influence colony-specific population dynamics. Overall, our findings suggest that abundant local prey is key in shaping spatial patterns of breeding common murres in northeastern Newfoundland and results in apparently minimal intraspecific competition. As anthropogenic pressures on resource availability heighten, insight into factors influencing intraspecific foraging niche dynamics will be critical to inform management.

Foraging-Niche Dynamics of Gadwalls and American Coots in Winter

The Auk ◽  
1998 ◽  
Vol 115 (3) ◽  
pp. 670-683 ◽  
Author(s):  
S. Keith McKnight ◽  
Gary R. Hepp
Keyword(s):  
Niche Dynamics ◽  
Foraging Niche

scholarly journals Social learning in birds and its role in shaping a foraging niche

2011 ◽  
Vol 366 (1567) ◽  
pp. 969-977 ◽  
Author(s):  
Tore Slagsvold ◽  
Karen L. Wiebe
Keyword(s):  
Social Learning ◽  
Foraging Behaviour ◽  
Parus Major ◽  
Passerine Birds ◽  
Cyanistes Caeruleus ◽  
In Captivity ◽  
In The Wild ◽  
Foraging Niche ◽  
Evolutionary Consequences ◽  
Blue Tits

We briefly review the literature on social learning in birds, concluding that strong evidence exists mainly for predator recognition, song, mate choice and foraging. The mechanism of local enhancement may be more important than imitation for birds learning to forage, but the former mechanism may be sufficient for faithful transmission depending on the ecological circumstances. To date, most insights have been gained from birds in captivity. We present a study of social learning of foraging in two passerine birds in the wild, where we cross-fostered eggs between nests of blue tits, Cyanistes caeruleus and great tits, Parus major . Early learning causes a shift in the foraging sites used by the tits in the direction of the foster species. The shift in foraging niches was consistent across seasons, as showed by an analysis of prey items, and the effect lasted for life. The fact that young birds learn from their foster parents, and use this experience later when subsequently feeding their own offspring, suggests that foraging behaviour can be culturally transmitted over generations in the wild. It may therefore have both ecological and evolutionary consequences, some of which are discussed.

scholarly journals An ecological niche shift for Neanderthal populations in Western Europe 70,000 years ago

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
William E. Banks ◽  
Marie-Hélène Moncel ◽  
Jean-Paul Raynal ◽  
Marlon E. Cobos ◽  
Daniel Romero-Alvarez ◽  
...  
Keyword(s):  
Material Culture ◽  
Ecological Niche ◽  
Western Europe ◽  
Ecological Niche Modeling ◽  
Climatic Variability ◽  
Niche Shift ◽  
Ecological Niches ◽  
Middle Paleolithic ◽  
Niche Dynamics ◽  
Anatomically Modern Humans

AbstractMiddle Paleolithic Neanderthal populations occupied Eurasia for at least 250,000 years prior to the arrival of anatomically modern humans. While a considerable body of archaeological research has focused on Neanderthal material culture and subsistence strategies, little attention has been paid to the relationship between regionally specific cultural trajectories and their associated existing fundamental ecological niches, nor to how the latter varied across periods of climatic variability. We examine the Middle Paleolithic archaeological record of a naturally constrained region of Western Europe between 82,000 and 60,000 years ago using ecological niche modeling methods. Evaluations of ecological niche estimations, in both geographic and environmental dimensions, indicate that 70,000 years ago the range of suitable habitats exploited by these Neanderthal populations contracted and shifted. These ecological niche dynamics are the result of groups continuing to occupy habitual territories that were characterized by new environmental conditions during Marine Isotope Stage 4. The development of original cultural adaptations permitted this territorial stability.

scholarly journals Computational modelling of perivascular-niche dynamics for the optimization of treatment schedules for glioblastoma

2021 ◽  
Vol 5 (4) ◽  
pp. 346-359
Author(s):  
Amanda Randles ◽  
Hans-Georg Wirsching ◽  
Jamie A. Dean ◽  
Yu-Kang Cheng ◽  
Samuel Emerson ◽  
...  
Keyword(s):  
Computational Modelling ◽  
Perivascular Niche ◽  
Niche Dynamics

Two new cestode species of the family Hymenolepididae Perrier, 1897 (Cyclophyllidea) from passerine birds in Ethiopia, with the erection of Citrilolepis n. g.

2019 ◽  
Vol 96 (3) ◽  
pp. 279-297
Author(s):  
Yana D. Dimitrova ◽  
Boyko B. Georgiev ◽  
Jean Mariaux ◽  
Gergana P. Vasileva
Keyword(s):  
Passerine Birds ◽  
Cestode Species ◽  
The Family
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