Intra-tropical movements as a beneficial strategy for Palearctic migratory birds
Migratory birds often move significantly within their non-breeding range before returning to breed. It remains unresolved under which circumstances individuals relocate, whether movement patterns are consistent between populations and to what degree the individuals benefit from the intra-tropical mo...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Royal Society
2018-01-01
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| Series: | Royal Society Open Science |
| Subjects: | |
| Online Access: | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171675 |
| _version_ | 1818348599439785984 |
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| author | Jaroslav Koleček Steffen Hahn Tamara Emmenegger Petr Procházka |
| author_facet | Jaroslav Koleček Steffen Hahn Tamara Emmenegger Petr Procházka |
| author_sort | Jaroslav Koleček |
| collection | DOAJ |
| description | Migratory birds often move significantly within their non-breeding range before returning to breed. It remains unresolved under which circumstances individuals relocate, whether movement patterns are consistent between populations and to what degree the individuals benefit from the intra-tropical movement (ITM). We tracked adult great reed warblers Acrocephalus arundinaceus from a central and a southeastern European breeding population, which either stay at a single non-breeding site, or show ITM, i.e. move to a second site. We related ITM to the normalized difference vegetation index (NDVI) describing vegetation conditions and probably reflecting food abundance for these insectivorous birds. Three-quarters of birds showed ITM across the non-breeding range. We found no difference in range values and mean values of NDVI between the single non-breeding sites of stationary birds and the two sites of moving birds. The vegetation conditions were better at the second sites compared to the first sites during the period which moving birds spent at the first sites. Vegetation conditions further deteriorated at the first sites during the period the moving birds resided at their second sites. Our study provides evidence that birds probably benefit from improved conditions after ITM compared to the conditions at the sites from where they departed. |
| first_indexed | 2024-12-13T17:52:37Z |
| format | Article |
| id | doaj.art-cd9f32c3b633428d9f06c13bcff73e56 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-13T17:52:37Z |
| publishDate | 2018-01-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-cd9f32c3b633428d9f06c13bcff73e562022-12-21T23:36:27ZengThe Royal SocietyRoyal Society Open Science2054-57032018-01-015110.1098/rsos.171675171675Intra-tropical movements as a beneficial strategy for Palearctic migratory birdsJaroslav KolečekSteffen HahnTamara EmmeneggerPetr ProcházkaMigratory birds often move significantly within their non-breeding range before returning to breed. It remains unresolved under which circumstances individuals relocate, whether movement patterns are consistent between populations and to what degree the individuals benefit from the intra-tropical movement (ITM). We tracked adult great reed warblers Acrocephalus arundinaceus from a central and a southeastern European breeding population, which either stay at a single non-breeding site, or show ITM, i.e. move to a second site. We related ITM to the normalized difference vegetation index (NDVI) describing vegetation conditions and probably reflecting food abundance for these insectivorous birds. Three-quarters of birds showed ITM across the non-breeding range. We found no difference in range values and mean values of NDVI between the single non-breeding sites of stationary birds and the two sites of moving birds. The vegetation conditions were better at the second sites compared to the first sites during the period which moving birds spent at the first sites. Vegetation conditions further deteriorated at the first sites during the period the moving birds resided at their second sites. Our study provides evidence that birds probably benefit from improved conditions after ITM compared to the conditions at the sites from where they departed.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171675geolocatorhabitat deteriorationndvipasserinessub-saharan africavegetation conditions |
| spellingShingle | Jaroslav Koleček Steffen Hahn Tamara Emmenegger Petr Procházka Intra-tropical movements as a beneficial strategy for Palearctic migratory birds Royal Society Open Science geolocator habitat deterioration ndvi passerines sub-saharan africa vegetation conditions |
| title | Intra-tropical movements as a beneficial strategy for Palearctic migratory birds |
| title_full | Intra-tropical movements as a beneficial strategy for Palearctic migratory birds |
| title_fullStr | Intra-tropical movements as a beneficial strategy for Palearctic migratory birds |
| title_full_unstemmed | Intra-tropical movements as a beneficial strategy for Palearctic migratory birds |
| title_short | Intra-tropical movements as a beneficial strategy for Palearctic migratory birds |
| title_sort | intra tropical movements as a beneficial strategy for palearctic migratory birds |
| topic | geolocator habitat deterioration ndvi passerines sub-saharan africa vegetation conditions |
| url | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171675 |
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