Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes)
Abstract Background Spatial isolation, diverging environmental conditions and social structures may lead to the differentiation of various traits, e.g. molecules, morphology and behaviour. Bird calls may provide important information on effects of geographic isolation and may reflect diverging ecolo...
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| Format: | Article |
| Language: | English |
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BMC
2018-07-01
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| Series: | BMC Evolutionary Biology |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12862-018-1222-1 |
| _version_ | 1819030452008124416 |
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| author | Jan Christian Habel Martin Husemann Werner Ulrich |
| author_facet | Jan Christian Habel Martin Husemann Werner Ulrich |
| author_sort | Jan Christian Habel |
| collection | DOAJ |
| description | Abstract Background Spatial isolation, diverging environmental conditions and social structures may lead to the differentiation of various traits, e.g. molecules, morphology and behaviour. Bird calls may provide important information on effects of geographic isolation and may reflect diverging ecological conditions related to altitude. Furthermore, bird calls are strongly shaped by the social behaviour of species. The Kenyan endemic bird Hinde’s Babbler, Turdoides hindei, is a cooperative breeder existing in distinct family groups. The species occurs in five isolated population groups at different altitudes across its distribution range in south-eastern Kenya. With this model species we test for potential effects of geographic isolation, diverging altitudes, and social structures. We recorded and analysed contact and alarm calls of T. hindei, including its entire distribution range and all existing population groups. Results Our data show significant differentiation of call characteristics among population groups across the species’ distribution range. This differentiation is correlated with geographical distance, but also with altitude. We also found strong call differentiation among neighbouring family groups. Call differentiation of contact calls was comparatively high in comparison to alarm calls, which showed a lower degree of divergence. Conclusion Our data show that call differentiation is governed by geographic isolation as well as altitude. Diverging degrees of call differentiation in contact and alarm calls suggests that both call types are under different selective pressures. Alarm calls are required to be understood by all members of the species across the entire distribution range and thus call differentiation is lower. In contrast, contact calls are more specific and differ even among neighbouring families supporting the maintenance of distinct bird families and groups. |
| first_indexed | 2024-12-21T06:30:22Z |
| format | Article |
| id | doaj.art-5ff6ebc2d72d400a8ffdfb2b0c0e754e |
| institution | Directory Open Access Journal |
| issn | 1471-2148 |
| language | English |
| last_indexed | 2024-12-21T06:30:22Z |
| publishDate | 2018-07-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Evolutionary Biology |
| spelling | doaj.art-5ff6ebc2d72d400a8ffdfb2b0c0e754e2022-12-21T19:13:01ZengBMCBMC Evolutionary Biology1471-21482018-07-011811910.1186/s12862-018-1222-1Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes)Jan Christian Habel0Martin Husemann1Werner Ulrich2Terrestrial Ecology Research Group, Department of Ecology and Ecosystem Management, Technische Universität MünchenCentrum für Naturkunde, Universität HamburgDepartment of Ecology and Biogeography, Nicolaus Copernicus University in ToruńAbstract Background Spatial isolation, diverging environmental conditions and social structures may lead to the differentiation of various traits, e.g. molecules, morphology and behaviour. Bird calls may provide important information on effects of geographic isolation and may reflect diverging ecological conditions related to altitude. Furthermore, bird calls are strongly shaped by the social behaviour of species. The Kenyan endemic bird Hinde’s Babbler, Turdoides hindei, is a cooperative breeder existing in distinct family groups. The species occurs in five isolated population groups at different altitudes across its distribution range in south-eastern Kenya. With this model species we test for potential effects of geographic isolation, diverging altitudes, and social structures. We recorded and analysed contact and alarm calls of T. hindei, including its entire distribution range and all existing population groups. Results Our data show significant differentiation of call characteristics among population groups across the species’ distribution range. This differentiation is correlated with geographical distance, but also with altitude. We also found strong call differentiation among neighbouring family groups. Call differentiation of contact calls was comparatively high in comparison to alarm calls, which showed a lower degree of divergence. Conclusion Our data show that call differentiation is governed by geographic isolation as well as altitude. Diverging degrees of call differentiation in contact and alarm calls suggests that both call types are under different selective pressures. Alarm calls are required to be understood by all members of the species across the entire distribution range and thus call differentiation is lower. In contrast, contact calls are more specific and differ even among neighbouring families supporting the maintenance of distinct bird families and groups.http://link.springer.com/article/10.1186/s12862-018-1222-1AltitudeGeographic isolationEnvironmental conditionsSocial structuresBirdsCooperative breeder |
| spellingShingle | Jan Christian Habel Martin Husemann Werner Ulrich Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes) BMC Evolutionary Biology Altitude Geographic isolation Environmental conditions Social structures Birds Cooperative breeder |
| title | Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes) |
| title_full | Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes) |
| title_fullStr | Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes) |
| title_full_unstemmed | Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes) |
| title_short | Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes) |
| title_sort | evolution of contact and alarm calls in the kenyan endemic hinde s babbler aves passeriformes |
| topic | Altitude Geographic isolation Environmental conditions Social structures Birds Cooperative breeder |
| url | http://link.springer.com/article/10.1186/s12862-018-1222-1 |
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