scholarly journals Hatching date influences winter habitat occupancy: Examining seasonal interactions across the full annual cycle in a migratory songbird

2021 ◽  
Author(s):  
Michael E. Akresh ◽  
David I. King ◽  
Peter P. Marra
Keyword(s):  
Annual Cycle ◽  
Hatching Date ◽  
Seasonal Interactions ◽  
Winter Habitat ◽  
Habitat Occupancy ◽  
Migratory Songbird

Effects of breeding versus winter habitat loss and fragmentation on the population dynamics of a migratory songbird

2016 ◽  
Vol 26 (2) ◽  
pp. 424-437 ◽  
Author(s):  
Caz M. Taylor ◽  
Bridget J. M. Stutchbury
Keyword(s):  
Population Dynamics ◽  
Habitat Loss ◽  
Winter Habitat ◽  
Habitat Loss And Fragmentation ◽  
Migratory Songbird

scholarly journals Multiple intrinsic markers identify carry-over effects from wintering to breeding sites for three Nearctic–Neotropical migrant swallows

The Auk ◽  
2019 ◽  
Vol 136 (4) ◽  
Author(s):  
Tara L Imlay ◽  
Frédéric Angelier ◽  
Keith A Hobson ◽  
Gabriela Mastromonaco ◽  
Sarah Saldanha ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Annual Cycle ◽  
Structural Equation ◽  
Migratory Birds ◽  
Equation Modeling ◽  
Breeding Period ◽  
Population Declines ◽  
Winter Habitat ◽  
Neotropical Migrant ◽  
Carry Over

Abstract Carry-over effects from one stage of the annual cycle to subsequent stages can have profound effects on individual fitness. In migratory birds, much research has been devoted to examining such effects from the nonbreeding to the breeding period. We investigated potential carry-over effects influencing spring body condition, breeding phenology, and performance for 3 species of sympatric, declining Nearctic–Neotropical migratory swallows: Bank Swallow (Riparia riparia), Barn Swallow (Hirundo rustica), and Cliff Swallow (Petrochelidon pyrrhonota). To examine carry-over effects, we used structural equation modeling and several intrinsic markers, including stable isotope (δ 2H, δ 13C, and δ 15N) and corticosterone (CORTf) values from winter molted-feathers, and changes in telomere length between breeding seasons. We found support for carry-over effects for all 3 species, however, the specific relationships varied between species and sexes. Effects leading to lower breeding performance were only observed in male Bank, female Barn, and female and male Cliff Swallows. In most cases, carry-over effects were attributed to differences in stable isotope values (most commonly with δ 2H) presumably related to differences in winter habitat use, but, for Cliff Swallows, negative carry-over effects were also linked to higher CORTf values and greater rates of telomere shortening. This work provides further support for the potential role of nonbreeding conditions on population declines, and indicates how multiple intrinsic markers can be used to provide information on ecological conditions throughout the annual cycle.

scholarly journals Habitat loss on the breeding grounds is a major contributor to population declines in a long-distance migratory songbird

2021 ◽  
Vol 288 (1949) ◽  
Author(s):  
Michael T. Hallworth ◽  
Erin Bayne ◽  
Emily McKinnon ◽  
Oliver Love ◽  
Junior A. Tremblay ◽  
...  
Keyword(s):  
Habitat Loss ◽  
Annual Cycle ◽  
Forest Loss ◽  
Population Declines ◽  
Migration Routes ◽  
Long Distance ◽  
Migratory Songbirds ◽  
Breeding Grounds ◽  
Migratory Songbird ◽  
Land Use Practices

Many migratory species are declining and for most, the proximate causes of their declines remain unknown. For many long-distance Neotropical migratory songbirds, it is assumed that habitat loss on breeding or non-breeding grounds is a primary driver of population declines. We integrated data collected from tracking technology, community science and remote sensing data to quantify migratory connectivity (MC), population trends and habitat loss. We quantified the correlation between forest change throughout the annual cycle and population declines of a long-distance migratory songbird, the Connecticut warbler ( Oporornis agilis , observed decline: −8.99% yr −1 ). MC, the geographic link between populations during two or more phases of the annual cycle, was stronger between breeding and autumn migration routes (MC = 0.24 ± 0.23) than between breeding and non-breeding locations (MC = −0.2 ± 0.14). Different Connecticut warbler populations tended to have population-specific fall migration routes but overlapped almost completely within the northern Gran Chaco ecoregion in South America. Cumulative forest loss within 50 km of breeding locations and the resulting decline in the largest forested patch index was correlated more strongly with population declines than forest loss on migratory stopover regions or on wintering locations in South America, suggesting that habitat loss during the breeding season is a driver of observed population declines for the Connecticut warbler. Land-use practices that retain large, forested patches within landscapes will likely benefit breeding populations of this declining songbird, but further research is needed to help inform land-use practices across the full annual cycle to minimize the impacts to migratory songbirds and abate ongoing population declines.

scholarly journals Natal dispersal driven by environmental conditions interacting across the annual cycle of a migratory songbird

2008 ◽  
Vol 105 (8) ◽  
pp. 2929-2933 ◽  
Author(s):  
C. E. Studds ◽  
T. K. Kyser ◽  
P. P. Marra
Keyword(s):  
Annual Cycle ◽  
Environmental Conditions ◽  
Natal Dispersal ◽  
Migratory Songbird

scholarly journals Seasonal Interactions, Habitat Quality, and Population Dynamics in Migratory Birds

The Condor ◽  
2007 ◽  
Vol 109 (3) ◽  
pp. 535-547 ◽  
Author(s):  
D. Ryan Norris ◽  
Peter P. Marra
Keyword(s):  
Population Dynamics ◽  
Habitat Selection ◽  
Habitat Quality ◽  
Migratory Birds ◽  
Population Level ◽  
Seasonal Interactions ◽  
Individual Level ◽  
Habitat Occupancy ◽  
Per Capita ◽  
The Individual

AbstractAbstract. Historically, studies of habitat selection have focused on quantifying how current patterns of habitat occupancy influence condition and survival within a season. This approach, however, is overly simplistic, especially for migratory birds that spend different periods of the year in geographically distinct places. Habitat occupancy and the resulting condition of individual birds is likely to be affected by events in the previous season, and the consequences of habitat occupancy will influence individuals and populations in subsequent seasons. Thus, for migratory birds, variation in habitat quality (and quantity) needs to be understood in the context of how events interact throughout periods of the annual cycle. Seasonal interactions can occur at the individual level or population level. Individual-level interactions occur when events in one season produce nonlethal, residual effects that carry over to influence individuals the following season. Population-level interactions occur when a change in population size in one season influences per capita rates the following season. We review various methods for estimating seasonal interactions and highlight a number of examples in the literature. Using a variety of techniques, including intrinsic and extrinsic markers, the vast majority of studies to date have measured seasonal interactions at the individual level. Obtaining estimates of density and changes in per capita rates across multiple seasons to determine population-level interactions has been more challenging. Both types of seasonal interactions can influence population dynamics, but predicting their effects requires detailed knowledge of how populations are geographically connected (i.e., migratory connectivity). We recommend that researchers studying habitat occupancy and habitat selection consider how events in previous seasons influence events within a season.

Habitat occupancy patterns of a forest dwelling songbird: causes and consequences

2005 ◽  
Vol 83 (10) ◽  
pp. 1297-1305 ◽  
Author(s):  
Patrick J Doran ◽  
Richard T Holmes
Keyword(s):  
Age Structure ◽  
Reproductive Performance ◽  
High Frequency ◽  
Reproductive Output ◽  
Arrival Times ◽  
Dendroica Caerulescens ◽  
Habitat Occupancy ◽  
Abundance Patterns ◽  
Occupancy Patterns ◽  
Migratory Songbird

We examined patterns of habitat use and reproductive performance of a migratory songbird, the black-throated blue warbler (Dendroica caerulescens (Gmelin, 1789)), within a 3160-ha forested landscape. We surveyed 371 sites over a 3-year period. Some sites were never occupied, while others were occupied for 1, 2, or 3 years. For these 3 years we found that warbler abundance increased with frequency of occupancy. Additionally, we found that (i) deciduousness and understory shrub density increased with frequency of occupancy; (ii) in 1 of 3 years, food abundance was higher at the most frequently occupied sites; and (iii) nest predators exhibited predator-specific abundance patterns across occupancy categories. We next used occupancy patterns documented in the first 3 years of the study to predict settlement, age structure, and reproductive performance at a subset of sites in the final year of the study. We found that males settled earlier in the breeding season at sites with a high frequency of occupancy. There were no differences in arrival times of females. Additionally, age structure did not vary for either males or females across sites with different occupancy levels. Although we found no difference in mean reproductive output across sites with different occupancy levels, over 50% of the young produced fledged from territories overlapping the high occupancy sites.

scholarly journals Annual Cycle and Migration Strategies of a Trans-Saharan Migratory Songbird: A Geolocator Study in the Great Reed Warbler

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e79209 ◽  
Author(s):  
Hilger W. Lemke ◽  
Maja Tarka ◽  
Raymond H. G. Klaassen ◽  
Mikael Åkesson ◽  
Staffan Bensch ◽  
...  
Keyword(s):  
Annual Cycle ◽  
Great Reed Warbler ◽  
Reed Warbler ◽  
Migration Strategies ◽  
Migratory Songbird ◽  
And Migration

Variation in survivorship of a migratory songbird throughout its annual cycle

2002 ◽  
Vol 71 (2) ◽  
pp. 296-308 ◽  
Author(s):  
T. Scott Sillett ◽  
Richard T. Holmes
Keyword(s):  
Annual Cycle ◽  
Migratory Songbird

scholarly journals Connecting the dots: Stopover strategies of an intercontinental migratory songbird in the context of the annual cycle

2017 ◽  
Vol 7 (17) ◽  
pp. 6716-6728 ◽  
Author(s):  
Kristina L. Paxton ◽  
Frank R. Moore
Keyword(s):  
Annual Cycle ◽  
Migratory Songbird ◽  
Connecting The Dots
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