Sex and Age Differences in Site Fidelity, Food Resource Tracking, and Body Condition of Wintering Kirtland's Warblers (Setophaga Kirtlandii) in the Bahamas

Wunderle, Joseph M.; Lebow, Patricia K.; White, Jennifer Duffield; Currie, David J.; Ewert, David N.

doi:10.1642/aoum.80-1

Cited by 10 publications

(15 citation statements)

References 107 publications

(177 reference statements)

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“…To calculate this metric, one must define: (1) at least two breeding and two wintering regions, (2) the distances between the breeding regions and the distances between the wintering regions, (3) transition probabilities from each wintering region to each breeding region, (4) the relative abundance within each of the wintering regions, and (5) the sample size. We defined Eleuthera and Cat Island as separate wintering regions because we know that wintering individuals may move at fairly large scales within an island, e.g., at least 14.8 km (Wunderle et al 2014), but we have no evidence of interisland movements within or between years. We evaluated migratory connectivity at two spatial scales: across the entire breeding range and only within the Lower Peninsula of Michigan, where 97%-100% of Kirtland's Warblers bred depending on the year.…”

Section: Discussionmentioning

confidence: 99%

“…Kirtland's Warblers on Eleuthera, The Bahamas, were captured and banded by both focal and passive mist netting from 2002 to 2009 as summarized in Wunderle et al (2010Wunderle et al ( , 2014. We uniquely color banded 220 individuals (141 males, 79 females) on Eleuthera.…”

Section: Banding and Resighting Studymentioning

confidence: 99%

“…Nestlings banded in Michigan's Lower Peninsula have dispersed to Wisconsin and Ontario, up to 676 km from their natal site (Walkinshaw 1983). On the wintering range, Kirtland's Warblers occupy early successional habitat (3-28 years postdisturbance; Wunderle et al 2010), and birds can move at least 14.8 km within a winter, typically from resource-poor to resource-rich sites, because of a shifting mosaic of resource availability (Wunderle et al 2014). Consequently, Kirtland's Warblers appear to be adapted to disperse to locate suitable habitat that is spatially and temporally patchy across the landscape during both breeding and wintering seasons (Probst 1986, Wunderle et al 2010.…”

Section: Drivers Of Weak Connectivitymentioning

confidence: 99%

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Resighting data reveal weak connectivity from wintering to breeding grounds in a range-restricted and endangered long-distance migratory passerine

Cooper¹,

Ewert²,

Hall³

et al. 2018

ACE

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Understanding migratory connectivity is fundamental to the ecology, evolution, and conservation of migratory species. The endangered Kirtland's Warbler (Setophaga kirtlandii) has a restricted breeding range in early successional jack pine (Pinus banksiana) forests with most of the population in northern Michigan and smaller subpopulations in Wisconsin and Ontario. Kirtland's Warblers spend the winter almost exclusively in the Bahamian Archipelago. Using a combination of visual searches and radiotelemetry, we relocated 89 Kirtland's Warblers on the breeding grounds that were captured and banded on two islands in the central Bahamas. We quantified the strength of migratory connectivity using a new metric "MC," and the Mantel test. We found that regardless of wintering island, Kirtland's Warblers intermixed heavily on the breeding grounds, having migrated to sites throughout the entire breeding range. Our estimates indicated weak connectivity between the wintering and breeding grounds, as might be predicted from a species that uses ephemeral, early successional habitat on both the wintering and breeding grounds. These results suggest that loss of habitat at a wintering site would have a diffuse effect across the entire population. The importance of a landscape approach to conservation of this species, long recognized in the breeding season and more recently emphasized on the wintering grounds, is supported by our findings. Les données de réobservation révèlent une faible connectivité entre les aires d'hivernage et celles de reproduction d'un passereau migrateur de longue distance, en voie de disparition et de répartition restreinte RÉSUMÉ. La compréhension de la connectivité des déplacements migratoires est fondamentale pour l'écologie, l'évolution et la conservation des espèces migratrices. La Paruline de Kirtland (Setophaga kirtlandii), en voie de disparition, a une aire de reproduction restreinte aux forêts de pins gris (Pinus banksiana) de début de succession, et le gros de sa population se trouve dans le nord du Michigan, avec de petites sous-populations fréquentant le Wisconsin et l'Ontario. Cette paruline passe presque exclusivement l'hiver dans l'archipel des Bahamas. À l'aide de recherches visuelles et de la radiotélémétrie, nous avons relocalisé sur les aires de nidification 89 Parulines de Kirtland qui avaient été capturées et baguées sur deux îles dans le centre des Bahamas. Nous avons quantifié le degré de connectivité des déplacements migratoires au moyen d'une nouvelle mesure dite « MC » et du test de Mantel. Nous avons trouvé que, peu importe leur île d'hivernage, les Parulines de Kirtland migrent aux quatre coins de l'aire de reproduction et se mélangent grandement sur les sites de nidification. Nos estimations ont indiqué une faible connectivité entre les aires d'hivernage et celles de nidification, comme on peut le supposer chez une espèce qui fréquente des milieux éphémères de début de succession, tant sur les aires d'hivernage que de nidification. Nos résultats montrent que la perte d'habitat su...

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Section: Discussionmentioning

confidence: 99%

Section: Banding and Resighting Studymentioning

confidence: 99%

Section: Drivers Of Weak Connectivitymentioning

confidence: 99%

See 1 more Smart Citation

Resighting data reveal weak connectivity from wintering to breeding grounds in a range-restricted and endangered long-distance migratory passerine

Cooper¹,

Ewert²,

Hall³

et al. 2018

ACE

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“…Wunderle Jr. et al. (2014) reported trends in winter fruit abundance of three shrub species on Eleuthera. We expand that work by examining trends in flowering and fruiting among all fleshy‐fruited species present in those study sites over a longer period.…”

Section: Introductionmentioning

confidence: 99%

“…Here, we address this knowledge gap, using dry season (winter) plant reproductive phenology data collected over a 9-year period in TDF on the island of Eleuthera, The Bahamas, an archipelago grossly underrepresented among phenology studies (Mendoza et al, 2017). Wunderle Jr. et al (2014) reported trends in winter fruit abundance of three shrub species on Eleuthera. We expand that work by examining trends in flowering and fruiting among all fleshy-fruited species present in those study sites over a longer period.…”

mentioning

confidence: 99%

Winter dry season reproductive phenology in Bahamian dry forest and implications for conservation

Fleming,

Wunderle,

White

et al. 2024

Biotropica

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The reproductive phenology of plants has profound influence on ecosystem dynamics including plant–animal interactions. Broad phenological patterns, especially the timing of reproduction, may result from long‐term climate trends and co‐evolution between plants and their pollinators, dispersers, and predators. Yet, interannual climate variation and local abiotic conditions may also affect the timing and magnitude of plant reproduction. Understanding the patterns of and controls on plant reproduction are crucial for conservation efforts under a changing global climate and rapidly expanding human development. However, phenology studies from the Neotropics are sparse. Here, we examine the relative timing and magnitude of fleshy‐fruited plant reproduction during the winter dry season in subtropical dry forest on Eleuthera, The Bahamas over a nine‐year period. At least 47 species were observed with some dry season reproductive activity, but only 17% showed evidence of a fruiting peak or continuous reproduction. Overall fruit abundance generally declined through the dry season, but flower production increased between mid and late dry season. Variation in fruit and flower abundance among years was related to temperature and rainfall, but local site conditions—particularly successional stage and groundwater availability—explained more variability in reproductive activity than climate variation. Groundwater availability had a particularly strong positive influence on flower and fruit abundance at the end of the dry season, a critical time for migrant frugivores preparing to return to their breeding grounds. This emphasizes the importance of protecting sites with accessible groundwater to conserve biodiversity in the archipelago and elsewhere.

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Sex-specific difference in migration schedule as a precursor of protandry in a long-distance migratory bird

Pedersen

Jakobsen

Strandberg

et al. 2019

Sci Nat

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Sex and Age Differences in Site Fidelity, Food Resource Tracking, and Body Condition of Wintering Kirtland's Warblers (Setophaga Kirtlandii) in the Bahamas

Cited by 10 publications

References 107 publications

Resighting data reveal weak connectivity from wintering to breeding grounds in a range-restricted and endangered long-distance migratory passerine

Resighting data reveal weak connectivity from wintering to breeding grounds in a range-restricted and endangered long-distance migratory passerine

Winter dry season reproductive phenology in Bahamian dry forest and implications for conservation

Sex-specific difference in migration schedule as a precursor of protandry in a long-distance migratory bird

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