scholarly journals Limited shifts in the distribution of migratory bird breeding habitat density in response to future changes in climate

2021 ◽  
Author(s):  
Owen P. McKenna ◽  
David M. Mushet ◽  
Samuel R. Kucia ◽  
Elyssa C. McCulloch
Keyword(s):  
Migratory Bird ◽  
Breeding Habitat ◽  
Bird Breeding

Breeding habitat selection in an obligate beach bird: a test of the food resource hypothesis

2015 ◽  
Vol 66 (9) ◽  
pp. 841 ◽  
Author(s):  
Anna Cuttriss ◽  
Grainne S. Maguire ◽  
Glenn Ehmke ◽  
Michael A. Weston
Keyword(s):  
Habitat Selection ◽  
Marine Pollution ◽  
Food Resource ◽  
Breeding Habitat ◽  
Breeding Sites ◽  
Kelp Harvesting ◽  
Bird Breeding ◽  
Prey Resources ◽  
Resource Hypothesis ◽  
A Site

The food resource hypothesis of breeding habitat selection in beach-nesting birds suggests that birds breed at sites with more prey to meet the increased energetic requirements associated with breeding. We compare prey resources using pitfall traps and core samples at breeding sites and absence sites of the eastern population of hooded plover, Thinornis rubricollis rubricollis, which, in this part of its range, is a threatened obligate beach bird. Breeding sites had higher abundances, equivalent species richness, and different assemblages of invertebrate prey compared with absence sites. Assemblages at breeding sites were characterised by more isopods, and fewer beetles of the family Phycosecidae. Breeding habitat selection by plovers appears to be associated with selection for sites with more food, and any process that degrades food resources at a site (e.g. kelp harvesting or marine pollution events) may reduce the likelihood of occupancy of that site by breeding birds.

scholarly journals Severe recent decrease of adult body mass in a declining insectivorous bird population

2014 ◽  
Vol 281 (1786) ◽  
pp. 20140649 ◽  
Author(s):  
Sébastien Rioux Paquette ◽  
Fanie Pelletier ◽  
Dany Garant ◽  
Marc Bélisle
Keyword(s):  
Body Mass ◽  
Habitat Quality ◽  
Bird Species ◽  
Migratory Bird ◽  
Breeding Habitat ◽  
Tree Swallow ◽  
Adult Body Mass ◽  
Agricultural Intensity ◽  
Carry Over ◽  
Substantial Decline

Migratory bird species that feed on air-borne insects are experiencing widespread regional declines, but these remain poorly understood. Agricultural intensification in the breeding range is often regarded as one of the main drivers of these declines. Here, we tested the hypothesis that body mass in breeding individuals should reflect habitat quality in an aerial insectivore, the tree swallow ( Tachycineta bicolor ), along a gradient of agricultural intensity. Our dataset was collected over 7 years (2005–2011) and included 2918 swallow captures and 1483 broods. Analyses revealed a substantial decline of the population over the course of the study (−19% occupancy rate), mirrored by decreasing body mass. This trend was especially severe in females, representing a total loss of 8% of their mass. Reproductive success was negatively influenced by intensive agriculture, but did not decrease over time. Interestingly, variation in body mass was independent of breeding habitat quality, leading us to suggest that this decline in body mass may result from carry-over effects from non-breeding areas and affect population dynamics through reduced survival. This work contributes to the growing body of evidence suggesting that declines in migratory aerial insectivores are driven by multiple, complex factors requiring better knowledge of year-round habitat use.

scholarly journals Spatial and temporal differences in migration strategies among endangered European Greater Spotted Eagles Clanga clanga

2021 ◽  
pp. 1-14
Author(s):  
ÜLO VÄLI ◽  
VALERY DOMBROVSKI ◽  
GRZEGORZ MACIOROWSKI ◽  
URMAS SELLIS ◽  
ADHAM ASHTON-BUTT
Keyword(s):  
Wetland Loss ◽  
Migratory Bird ◽  
Gps Tracking ◽  
Southern Europe ◽  
Migration Strategy ◽  
Wintering Grounds ◽  
Breeding Populations ◽  
Population Spread ◽  
Bird Breeding ◽  
Wintering Range

Summary Understanding connectivity between migratory bird breeding and wintering grounds is essential for range-wide planning of conservation activities. We used GPS tracking to explore the migration of 28 ‘Endangered’ Greater Spotted Eagles, Clanga clanga from three remaining European breeding populations towards their wintering range, and to identify population and sex-specific patterns in selection of wintering sites. The tracked eagles wintered in three continents, 46% in Africa (mostly Eastern Sahel), 43% across southern Europe (mostly Greece) and 11% in Asia (the Middle East). Migratory connectivity was weak (rM = 0.16), and the population spread across the wintering range was large (1,917 km). The three studied populations differed in their migration strategy, with northerly, Estonian breeders all wintering in Southern Europe, and Polish and Belarusian breeders divided between Southern Europe and Africa. Migration strategy was different between Belarusian males and females, with males more likely to winter in Africa than Europe, and on average, migrating 2,500 km further south than females. Migration to Africa took longer, but was partly compensated by higher migration speeds. Greater Spotted Eagles wintered in wetland sites throughout their wintering range, with 15 of 29 birds wintering in internationally or nationally protected sites (including 12 Ramsar sites). Nearly a third of European winterers stayed in the same Greek national park, perhaps indicating a limitation of suitable sites in Europe due to wetland loss or degradation. This highlights the importance of protected wetlands to this species, but also shows their vulnerability to future wetland degradation. Only two of 14 wintering sites in Africa were under protection, showing a potential mismatch between protection of females and males in their wintering grounds.

scholarly journals One Hundred Fifty Years of Change in Forest Bird Breeding Habitat: Estimates of Species Distributions

2005 ◽  
Vol 19 (6) ◽  
pp. 1944-1956 ◽  
Author(s):  
LISA A. SCHULTE ◽  
ANNA M. PIDGEON ◽  
DAVID J. MLADENOFF
Keyword(s):  
Species Distributions ◽  
Breeding Habitat ◽  
Forest Bird ◽  
Bird Breeding

Climate change and fitness components of a migratory bird breeding in the Mediterranean region

2003 ◽  
Vol 9 (3) ◽  
pp. 461-472 ◽  
Author(s):  
JUAN JOSÉ SANZ ◽  
JAIME POTTI ◽  
JUAN MORENO ◽  
SANTIAGO MERINO ◽  
OSCAR FRÍAs
Keyword(s):  
Climate Change ◽  
Mediterranean Region ◽  
Migratory Bird ◽  
Fitness Components ◽  
Bird Breeding ◽  
The Mediterranean

Characterising essential breeding habitat for whales informs the development of large-scale Marine Protected Areas in the South Pacific

2016 ◽  
Vol 548 ◽  
pp. 263-275 ◽  
Author(s):  
RE Lindsay ◽  
R Constantine ◽  
J Robbins ◽  
DK Mattila ◽  
A Tagarino ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Large Scale ◽  
South Pacific ◽  
Breeding Habitat ◽  
The South

Applying radar technology to migratory bird conservation and management: Strengthening and expanding a collaborative

2007 ◽  
Author(s):  
Janet M. Ruth ◽  
Albert Manville ◽  
Ron Larkin ◽  
Wylie C. Barrow ◽  
Lori Johnson-Randall ◽  
...  
Keyword(s):  
Migratory Bird ◽  
Bird Conservation ◽  
Conservation And Management
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