Egg translocation across a local range boundary reduces hatch rates in a trailing-edge population of a migratory songbird, Setophaga caerulescens (Black-throated Blue Warbler).
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| Title: | Egg translocation across a local range boundary reduces hatch rates in a trailing-edge population of a migratory songbird, Setophaga caerulescens (Black-throated Blue Warbler). |
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| Authors: | Merker, Samuel A (AUTHOR), Sillett, T Scott (AUTHOR), Freeman, Benjamin G (AUTHOR), Cooper, Robert J (AUTHOR), Chandler, Richard B (AUTHOR) |
| Source: | Ornithology (Oxford University Press). 7/1/2025, Vol. 142 Issue 3, p1-14. 14p. |
| Subjects: | Climate change, Migratory birds, Chicks, Biological fitness, Population biology |
| Geographic Terms: | Appalachian Mountains |
| Abstract: | The abiotic range limitation hypothesis states that species distributions are shaped by physiological constraints imposed by temperature and precipitation. To test this hypothesis, we assessed the impacts of climate on hatch rates by reciprocally translocating complete clutches of both Setophaga caerulescens (Black-throated Blue Warbler) and S. citrina (Hooded Warblers) across a local range boundary of S. caerulescens in the southern Appalachian Mountains. The S. caerulescens population occurs at the trailing edge of its breeding range, whereas the S. citrina population occurs near the core of its range. The hatching probability of S. caerulescens eggs declined from 0.93 ± 0.02 to 0.60 ± 0.07 when moved to S. citrina nests in warmer conditions. Translocation, however, had little effect on hatching probability of S. citrina eggs when moved to S. caerulescens nests in cooler environments. Thirteen reciprocal clutch translocations were performed; 17 clutches were moved as controls; and 49 nests were not manipulated. We monitored species-specific incubation behavior, measured microclimate conditions inside and outside nests using hygrochron iButtons, and examined the effects of temperature and humidity on nestling growth rates. Higher ambient temperatures had a greater effect on hatching probability than did humidity, but we were unable to determine if reduced hatching was caused by changes in temperature, humidity, or their interaction. We suggest that, in warmer conditions, S. caerulescens eggs in S. citrina nests may have been unable to cool sufficiently to avoid excessive water loss due to higher ambient temperatures but not a difference in relative humidity. Our finding that hatch rates of S. caerulescens declined when translocated to warmer conditions supports the hypothesis that distributions of trailing-edge populations are limited in part by climate effects on reproductive rates. [ABSTRACT FROM AUTHOR] |
| Copyright of Ornithology (Oxford University Press) is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 188027618 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Egg translocation across a local range boundary reduces hatch rates in a trailing-edge population of a migratory songbird, Setophaga caerulescens (Black-throated Blue Warbler). – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Merker%2C+Samuel+A%22">Merker, Samuel A</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sillett%2C+T+Scott%22">Sillett, T Scott</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Freeman%2C+Benjamin+G%22">Freeman, Benjamin G</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cooper%2C+Robert+J%22">Cooper, Robert J</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chandler%2C+Richard+B%22">Chandler, Richard B</searchLink> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ornithology+%28Oxford+University+Press%29%22">Ornithology (Oxford University Press)</searchLink>. 7/1/2025, Vol. 142 Issue 3, p1-14. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink><br /><searchLink fieldCode="DE" term="%22Migratory+birds%22">Migratory birds</searchLink><br /><searchLink fieldCode="DE" term="%22Chicks%22">Chicks</searchLink><br /><searchLink fieldCode="DE" term="%22Biological+fitness%22">Biological fitness</searchLink><br /><searchLink fieldCode="DE" term="%22Population+biology%22">Population biology</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Appalachian+Mountains%22">Appalachian Mountains</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The abiotic range limitation hypothesis states that species distributions are shaped by physiological constraints imposed by temperature and precipitation. To test this hypothesis, we assessed the impacts of climate on hatch rates by reciprocally translocating complete clutches of both Setophaga caerulescens (Black-throated Blue Warbler) and S. citrina (Hooded Warblers) across a local range boundary of S. caerulescens in the southern Appalachian Mountains. The S. caerulescens population occurs at the trailing edge of its breeding range, whereas the S. citrina population occurs near the core of its range. The hatching probability of S. caerulescens eggs declined from 0.93 ± 0.02 to 0.60 ± 0.07 when moved to S. citrina nests in warmer conditions. Translocation, however, had little effect on hatching probability of S. citrina eggs when moved to S. caerulescens nests in cooler environments. Thirteen reciprocal clutch translocations were performed; 17 clutches were moved as controls; and 49 nests were not manipulated. We monitored species-specific incubation behavior, measured microclimate conditions inside and outside nests using hygrochron iButtons, and examined the effects of temperature and humidity on nestling growth rates. Higher ambient temperatures had a greater effect on hatching probability than did humidity, but we were unable to determine if reduced hatching was caused by changes in temperature, humidity, or their interaction. We suggest that, in warmer conditions, S. caerulescens eggs in S. citrina nests may have been unable to cool sufficiently to avoid excessive water loss due to higher ambient temperatures but not a difference in relative humidity. Our finding that hatch rates of S. caerulescens declined when translocated to warmer conditions supports the hypothesis that distributions of trailing-edge populations are limited in part by climate effects on reproductive rates. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Ornithology (Oxford University Press) is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=188027618 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1093/ornithology/ukaf007 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1 Subjects: – SubjectFull: Climate change Type: general – SubjectFull: Migratory birds Type: general – SubjectFull: Chicks Type: general – SubjectFull: Biological fitness Type: general – SubjectFull: Population biology Type: general – SubjectFull: Appalachian Mountains Type: general Titles: – TitleFull: Egg translocation across a local range boundary reduces hatch rates in a trailing-edge population of a migratory songbird, Setophaga caerulescens (Black-throated Blue Warbler). Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Merker, Samuel A – PersonEntity: Name: NameFull: Sillett, T Scott – PersonEntity: Name: NameFull: Freeman, Benjamin G – PersonEntity: Name: NameFull: Cooper, Robert J – PersonEntity: Name: NameFull: Chandler, Richard B IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: 7/1/2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 27324613 Numbering: – Type: volume Value: 142 – Type: issue Value: 3 Titles: – TitleFull: Ornithology (Oxford University Press) Type: main |
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