Long-term population declines in Afro-Palearctic migrant birds

Sanderson, Fiona J.; Donald, Paul F.; Pain, Deborah J.; Burfield, Ian J.; Bommel, Frans P.J. van

doi:10.1016/j.biocon.2006.02.008

Cited by 579 publications

(590 citation statements)

References 41 publications

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“…If certain winter habitats degraded more than others during the twentieth century [e.g., farmland habitats in Europe, African forests, and open dry savannahs in the Sahel (30, 31)], then variation in the ability to advance migration date among species wintering in different habitats might be expected. Similarly, the breeding population of migrants can be regulated by ecological conditions in winter quarters, and thus population trends may vary according to winter habitat, provided that ecological conditions have changed differentially according to habitat type (31,32). However, change in migration date or population trends during both periods did not vary in relation to the main wintering habitat (see Table S3) for species wintering or not wintering in Africa (analysis of variance on species-specific values: species not wintering in Africa, all P Ͼ 0.10; species wintering in Africa, all P Ͼ 0.18).…”

Section: Discussionmentioning

confidence: 99%

Populations of migratory bird species that did not show a phenological response to climate change are declining

Møller

Rubolini

Lehikoinen

2008

Proc. Natl. Acad. Sci. U.S.A.

633

668

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Section: Discussionmentioning

confidence: 99%

Populations of migratory bird species that did not show a phenological response to climate change are declining

Møller

Rubolini

Lehikoinen

2008

Proc. Natl. Acad. Sci. U.S.A.

633

668

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“…This dependence on multiple sites, often separated by thousands of kilometers, renders migratory birds especially vulnerable to widespread anthropogenic change (Newton 2004, Faaborg et al 2010) and likely explains the persistent global declines documented in this group (Sanderson et al 2006, Holmes 2007. Full life-cycle approaches to conserving migratory birds therefore require detailed knowledge of all aspects of the life cycle (Sheehy et al 2010), yet, in the Americas, our lack of knowledge of stopover habitat, particularly in the tropics, is a major limiting factor for hemispheric initiatives aimed at reversing population declines (Faaborg et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Prioritizing tropical habitats for long-distance migratory songbirds: an assessment of habitat quality at a stopover site in Colombia

Bayly¹,

Gómez²,

Hobson³

et al. 2016

ACE

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ABSTRACT. Long-distance migratory birds are declining globally and migration has been identified as the primary source of mortality in this group. Despite this, our lack of knowledge of habitat use and quality at stopovers, i.e., sites where the energy for migration is accumulated, remains a barrier to designing appropriate conservation measures, especially in tropical regions. There is therefore an urgent need to assess stopover habitat quality and concurrently identify efficient and cost-effective methods for doing so. Given that fuel deposition rates directly influence stopover duration, departure fuel load, and subsequent speed of migration, they are expected to provide a direct measure of habitat quality and have the advantage of being measurable through body-mass changes. Here, we examined seven potential indicators of quality, including body-mass change, for two ecologically distinct Neotropical migratory landbirds on stopover in shade-coffee plantations and tropical humid premontane forest during spring migration in Colombia: (1) rate of body-mass change; (2) foraging rate; (3) recapture rate; (4) density; (5) flock size; (6) age and sex ratios; and (7) body-mass distribution. We found higher rates of mass change in premontane forest than in shade-coffee in Tennessee Warbler Oreothlypis peregrina, a difference that was mirrored in higher densities and body masses in forest. In Gray-cheeked Thrush Catharus minimus, a lack of recaptures in shade-coffee and higher densities in forest, also suggested that forest provided superior fueling conditions. For a reliable assessment of habitat quality, we therefore recommend using a suite of indicators, taking into account each species' ecology and methodological considerations. Our results also imply that birds stopping over in lower quality habitats may spend a longer time migrating and require more stopovers, potentially leading to important carryover effects on reproductive fitness. Evaluating habitat quality is therefore imperative prior to defining the conservation value of newly identified stopover regions.Priorisation de milieux tropicaux visant des passereaux migrateurs de longue distance : évaluation de la qualité de l'habitat dans une halte migratoire en Colombie RÉSUMÉ. Les oiseaux migrateurs de longue distance sont en diminution sur la planète et la migration a été pointée du doigt comme source primaire de mortalité chez ce groupe. Malgré ce constat, notre manque de connaissance sur l'utilisation et la qualité de l'habitat aux haltes migratoires -c.-à-d. les sites où les oiseaux accumulent l'énergie en vue de la migration -limite notre capacité à déterminer les mesures de conservation appropriées, spécialement dans les régions tropicales. L'évaluation de la qualité de l'habitat aux haltes est donc urgente, de même que la détermination de méthodes efficaces et rentables pour s'y prendre. Étant donné que les taux d'accumulation d'énergie influent directement sur la durée de séjour aux haltes, la charge d'énergie au départ d'une halte et la vitesse subséqu...

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“…Effects of climate change on migrants has been a research priority for some time (Wormworth & Mallon 2006), partly because it has been implicated in population dynamics of declining long-distance migrants (Sanderson et al 2006). …”

mentioning

confidence: 99%

Correlates of vulnerability to climate-induced distribution changes in European avifauna: habitat, migration and endemism

Goodenough

Hart

2013

Climatic Change

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Long-term population declines in Afro-Palearctic migrant birds

Cited by 579 publications

References 41 publications

Populations of migratory bird species that did not show a phenological response to climate change are declining

Populations of migratory bird species that did not show a phenological response to climate change are declining

Prioritizing tropical habitats for long-distance migratory songbirds: an assessment of habitat quality at a stopover site in Colombia

Correlates of vulnerability to climate-induced distribution changes in European avifauna: habitat, migration and endemism

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