Recent Abundance Changes at Species' Range Limits in the North and Central American Avifaunas.
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| Title: | Recent Abundance Changes at Species' Range Limits in the North and Central American Avifaunas. |
|---|---|
| Authors: | Freeman, Benjamin G.1 (AUTHOR) benjamin.g.freeman@gmail.com, Miller, Eliot T.2,3 (AUTHOR), Strimas‐Mackey, Matthew2 (AUTHOR) |
| Source: | Global Ecology & Biogeography. May2025, Vol. 34 Issue 5, p1-7. 7p. |
| Subjects: | Climate change, Species distribution, Bird ecology, Species diversity, Life history theory |
| Geographic Terms: | North America |
| Abstract: | Aim: Species are often expected to track climate change via changes in their abundances and distributions. This climate tracking hypothesis generates the prediction that warming temperatures should cause species to show population increases at their poleward range limits and population decreases at their equatorward range limits. We tested these predictions for 516 species of North and Central American birds. Location: North and Central America. Time Period: 2012–2022. Major Taxa Studied: Birds. Methods: We used data on bird species' recent abundance changes within their breeding or year‐round distributions from eBird Status and Trends models, and temperature data from a global temperature dataset. We defined species' northern and southern range limits, then used regression models to test whether recent abundance changes at species' range limits were predicted by temperature change and a set of ecological traits. Results: Abundance changes at species' range edges are not associated with temperature change. There is a latitudinal gradient in recent abundance changes: lower‐latitude species have increased in abundance at both northern and southern range limits, whereas higher‐latitude species have declined in abundance at both range limits. Conclusions: Patterns of abundance change at species' northern and southern range limits are not consistent with the climate tracking hypothesis for North and Central American birds. This result casts doubt on the accuracy of long‐term biological forecasts that assume tight temperature tracking for these avifaunas. Our finding of a latitudinal gradient in recent abundance change suggests lower‐latitude species may generally be benefiting from climate change, with consequences for local and regional communities across latitudinal gradients. [ABSTRACT FROM AUTHOR] |
| Copyright of Global Ecology & Biogeography is the property of Wiley-Blackwell 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: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 185452690 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Recent Abundance Changes at Species' Range Limits in the North and Central American Avifaunas. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Freeman%2C+Benjamin+G%2E%22">Freeman, Benjamin G.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> benjamin.g.freeman@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Miller%2C+Eliot+T%2E%22">Miller, Eliot T.</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Strimas‐Mackey%2C+Matthew%22">Strimas‐Mackey, Matthew</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Global+Ecology+%26+Biogeography%22">Global Ecology & Biogeography</searchLink>. May2025, Vol. 34 Issue 5, p1-7. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink><br /><searchLink fieldCode="DE" term="%22Species+distribution%22">Species distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Bird+ecology%22">Bird ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Species+diversity%22">Species diversity</searchLink><br /><searchLink fieldCode="DE" term="%22Life+history+theory%22">Life history theory</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22North+America%22">North America</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Aim: Species are often expected to track climate change via changes in their abundances and distributions. This climate tracking hypothesis generates the prediction that warming temperatures should cause species to show population increases at their poleward range limits and population decreases at their equatorward range limits. We tested these predictions for 516 species of North and Central American birds. Location: North and Central America. Time Period: 2012–2022. Major Taxa Studied: Birds. Methods: We used data on bird species' recent abundance changes within their breeding or year‐round distributions from eBird Status and Trends models, and temperature data from a global temperature dataset. We defined species' northern and southern range limits, then used regression models to test whether recent abundance changes at species' range limits were predicted by temperature change and a set of ecological traits. Results: Abundance changes at species' range edges are not associated with temperature change. There is a latitudinal gradient in recent abundance changes: lower‐latitude species have increased in abundance at both northern and southern range limits, whereas higher‐latitude species have declined in abundance at both range limits. Conclusions: Patterns of abundance change at species' northern and southern range limits are not consistent with the climate tracking hypothesis for North and Central American birds. This result casts doubt on the accuracy of long‐term biological forecasts that assume tight temperature tracking for these avifaunas. Our finding of a latitudinal gradient in recent abundance change suggests lower‐latitude species may generally be benefiting from climate change, with consequences for local and regional communities across latitudinal gradients. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Global Ecology & Biogeography is the property of Wiley-Blackwell 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.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/geb.70059 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 1 Subjects: – SubjectFull: Climate change Type: general – SubjectFull: Species distribution Type: general – SubjectFull: Bird ecology Type: general – SubjectFull: Species diversity Type: general – SubjectFull: Life history theory Type: general – SubjectFull: North America Type: general Titles: – TitleFull: Recent Abundance Changes at Species' Range Limits in the North and Central American Avifaunas. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Freeman, Benjamin G. – PersonEntity: Name: NameFull: Miller, Eliot T. – PersonEntity: Name: NameFull: Strimas‐Mackey, Matthew IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 1466822X Numbering: – Type: volume Value: 34 – Type: issue Value: 5 Titles: – TitleFull: Global Ecology & Biogeography Type: main |
| ResultId | 1 |
