Search Results - "Gunnarsson, Tómas G"

Why is timing of bird migration advancing when individuals are not? by Gill, Jennifer A., Alves, José A., Sutherland, William J., Appleton, Graham F., Potts, Peter M., Gunnarsson, Tómas G.

“…Recent advances in spring arrival dates have been reported in many migratory species but the mechanism driving these advances is unknown. As population…”
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Why do earlier‐arriving migratory birds have better breeding success? by Morrison, Catriona A., Alves, José A., Gunnarsson, Tómas G., Þórisson, Böðvar, Gill, Jennifer A.

“…In migratory birds, early arrival on breeding sites is typically associated with greater breeding success, but the mechanisms driving these benefits are rarely…”
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Subarctic afforestation: Effects of forest plantations on ground‐nesting birds in lowland Iceland by Pálsdóttir, Aldís E., Gill, Jennifer A., Alves, José A., Pálsson, Snæbjörn, Méndez, Verónica, Ewing, Harry, Gunnarsson, Tómas G.

“…Planting forests is a commonly suggested measure to mitigate climate change. The resulting changes in habitat structure can greatly influence the diversity and…”
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Introduction of summer houses into semi‐natural habitats: impacts on ground‐nesting birds by Pálsdóttir, Aldís E., Alves, José A., Gill, Jennifer A., Pálsson, Snæbjörn, Méndez, Verónica, Gunnarsson, Tómas G.

“…Degradation of natural and semi‐natural habitats is often initiated and facilitated by expansions in anthropogenic infrastructures. Identifying and reducing…”
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Linking range wide energetic tradeoffs to breeding performance in a long‐distance migrant by Carneiro, Camilo, Gunnarsson, Tómas G., Méndez, Verónica, Soares, Amadeu M. V. M., Alves, José A.

“…Understanding how individual tradeoffs and carry‐over effects along the annual cycle influence fitness is fundamental to unravel population dynamics, but such…”
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Does early spring arrival lead to early nesting in a migratory shorebird? Insights from remote tracking by Nightingale, Josh, Gill, Jennifer A., Gunnarsson, Tómas G., Rocha, Afonso D., Howison, Ruth A., Hooijmeijer, Jos C. E. W., Piersma, Theunis, Alves, José A.

“…Advancing breeding phenology is a commonly observed response to climate warming among bird species, potentially in response to shifts in the phenology of key…”
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Individual variation in migratory behavior in a subarctic partial migrant shorebird by Méndez, Verónica, Alves, José A, Þórisson, Böðvar, Marca, Alina, Gunnarsson, Tómas G, Gill, Jennifer A

“…Abstract Migratory behavior can differ markedly amongst individuals within populations or species. Understanding the factors influencing this variation is key…”
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Vegetation structure influences predation rates of early nests in subarctic breeding waders by Laidlaw, Rebecca A., Gunnarsson, Tómas G., Méndez, Verónica, Carneiro, Camilo, Þórisson, Böðvar, Wentworth, Adam, Gill, Jennifer A., Alves, José A.

“…Ground‐nesting species are vulnerable to a wide range of predators and often experience very high levels of nest predation. Strategies to reduce nest…”
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Effects of overhead power‐lines on the density of ground‐nesting birds in open sub‐arctic habitats by Pálsdóttir, Aldís Erna, Gill, Jennifer A., Pálsson, Snæbjörn, Alves, José A., Méndez, Verónica, Þórisson, Böðvar, Gunnarsson, Tómas G.

“…Yearly electricity production has increased steadily worlwide in recent decades and the associated overhead power lines are widespread and occur across urban…”
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Overtaking on migration: does longer distance migration always incur a penalty? by Alves, José A., Gunnarsson, Tómas G., Potts, Peter M., Gélinaud, Guillaume, Sutherland, William J., Gill, Jennifer A.

“…For many migratory bird species, the latitudinal range of the winter distribution spans thousands of kilometres, thus encompassing considerable variation in…”
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Reconciling biodiversity conservation and agricultural expansion in the subarctic environment of Iceland by Jóhannesdóttir, Lilja, Alves, José A., Gill, Jennifer A., Gunnarsson, Tómas G.

“…Intensified agricultural practices have driven biodiversity loss throughout the world, and although many actions aimed at halting and reversing these declines…”
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Sex promotes spatial and dietary segregation in a migratory shorebird during the non-breeding season by Catry, Teresa, Alves, José A, Gill, Jennifer A, Gunnarsson, Tómas G, Granadeiro, José P

“…Several expressions of sexual segregation have been described in animals, especially in those exhibiting conspicuous dimorphism. Outside the breeding season,…”
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The Effects of Habitat Type and Volcanic Eruptions on the Breeding Demography of Icelandic Whimbrels Numenius phaeopus by Katrínardóttir, Borgný, Alves, José A, Sigurjónsdóttir, Hrefna, Hersteinsson, Páll, Gunnarsson, Tómas G

“…Distinct preference of species for habitats is most often driven by long term differences in demographic rates between habitats. Estimating variation in those…”
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Sex‐biases in distribution and resource use at different spatial scales in a migratory shorebird by Alves, José A., Gunnarsson, Tómas G., Potts, Peter M., Sutherland, William J., Gill, Jennifer A.

“…In migratory species, sexual size dimorphism can mean differing energetic requirements for males and females. Differences in the costs of migration and in the…”
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Why Are Whimbrels Not Advancing Their Arrival Dates Into Iceland? Exploring Seasonal and Sex-Specific Variation in Consistency of Individual Timing During the Annual Cycle by Carneiro, Camilo, Gunnarsson, Tómas G., Alves, José A.

“…The timing of annual events is key for organisms that exploit seasonal resources, as deviations from optimal timing might result in considerable fitness costs…”
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Linking Weather and Phenology to Stopover Dynamics of a Long-Distance Migrant by Carneiro, Camilo, Gunnarsson, Tómas G., Alves, José A.

“…For many migratory species, migration can represent a significant part of the annual cycle and the strategies used to move between the breeding and…”
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Flexibility in spring arrival of migratory birds at northern latitudes under rapid temperature changes by Gunnarsson, Tómas G, Tómasson, Gunnar

“…Capsule Icelandic migrants have responded to rapidly increasing spring temperatures on the breeding grounds in recent years.Aims To determine how migrants…”
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Individual specialization in a shorebird population with narrow foraging niche by Catry, Teresa, Alves, José A., Gill, Jennifer A., Gunnarsson, Tómas G., Granadeiro, José P.

“…Individual specialization in resource use is a widespread driver for intra-population trait variation, playing a crucial evolutionary role in free-living…”
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Mechanisms driving phenological and range change in migratory species by Gill, Jennifer A, Alves, José A, Gunnarsson, Tómas G

“…Many migratory systems are changing rapidly in space and time, and these changes present challenges for conservation. Changes in local abundance and site…”
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Patterns and processes in shorebird survival rates: a global review by Méndez, Verónica, Alves, José A., Gill, Jennifer A., Gunnarsson, Tómas G.

“…Changes in demographic rates underpin changes in population size, and understanding demographic rates can greatly aid the design and development of strategies…”
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