Landscape configuration of an Amazonian island-like ecosystem drives population structure and genetic diversity of a habitat-specialist bird
Abstract Context Amazonian white-sand ecosystems(campinas)are open vegetation patches which form a natural island-like system in a matrix of tropical rainforest. Due to their clear distinction from the surrounding matrix, the spatial characteristics ofcampinapatches may affect the genetic diversity and composition of their specialized organisms such as the small and endemic passerineElaenia ruficeps.Objectives Here, we estimate the relative contribution of the current extension, configuration and geographical context ofcampinapatches to the patterns of genetic diversity and population structure ofE. ruficeps.Methods We sampled individuals ofE. ruficepsfrom three landscapes in Central Amazonia with contrastingcampinaspatial distribution, from landscapes with large and connected patches to landscapes with small and isolated patches. We estimate population structure, genetic diversity, and contemporary and historical migration within and among the three landscapes and used landscape metrics as predictor variables. Furthermore, we estimate genetic isolation by distance and resistance among individuals sampled within landscapes.Results We identified three genetically distinct populations with asymmetrical gene flow among landscapes and a decreasing migration rate with distance. Within each landscape, we found low genetic differentiation without genetic isolation by distance nor by resistance. In contrast, we found differentiation and spatial correlation between landscapes.Conclusions Our results uncover population dynamics ofE. ruficepsthrough time. Together with previous studies, this suggests that both regional context and landscape structure shape the connectivity among populations ofcampinaspecialist birds, and that Amazonian landscapes, together with their associated biota, have responded to recent climatic changes..
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Preprint| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
bioRxiv.org - (2022) vom: 09. Dez. Zur Gesamtaufnahme - year:2022 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ritter, Camila D. [VerfasserIn] |
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| doi: |
10.1101/2020.12.25.424395 |
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| PPN (Katalog-ID): |
XBI019592892 |
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| 100 | 1 | |a Ritter, Camila D. |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Landscape configuration of an Amazonian island-like ecosystem drives population structure and genetic diversity of a habitat-specialist bird |
| 264 | 1 | |c 2022 | |
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| 520 | |a Abstract Context Amazonian white-sand ecosystems(campinas)are open vegetation patches which form a natural island-like system in a matrix of tropical rainforest. Due to their clear distinction from the surrounding matrix, the spatial characteristics ofcampinapatches may affect the genetic diversity and composition of their specialized organisms such as the small and endemic passerineElaenia ruficeps.Objectives Here, we estimate the relative contribution of the current extension, configuration and geographical context ofcampinapatches to the patterns of genetic diversity and population structure ofE. ruficeps.Methods We sampled individuals ofE. ruficepsfrom three landscapes in Central Amazonia with contrastingcampinaspatial distribution, from landscapes with large and connected patches to landscapes with small and isolated patches. We estimate population structure, genetic diversity, and contemporary and historical migration within and among the three landscapes and used landscape metrics as predictor variables. Furthermore, we estimate genetic isolation by distance and resistance among individuals sampled within landscapes.Results We identified three genetically distinct populations with asymmetrical gene flow among landscapes and a decreasing migration rate with distance. Within each landscape, we found low genetic differentiation without genetic isolation by distance nor by resistance. In contrast, we found differentiation and spatial correlation between landscapes.Conclusions Our results uncover population dynamics ofE. ruficepsthrough time. Together with previous studies, this suggests that both regional context and landscape structure shape the connectivity among populations ofcampinaspecialist birds, and that Amazonian landscapes, together with their associated biota, have responded to recent climatic changes. | ||
| 650 | 4 | |a Biology |7 (dpeaa)DE-84 | |
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| 700 | 1 | |a Ribas, Camila C. |e verfasserin |4 aut | |
| 700 | 1 | |a Menger, Juliana |e verfasserin |4 aut | |
| 700 | 1 | |a Borges, Sergio H. |e verfasserin |4 aut | |
| 700 | 1 | |a Bacon, Christine D. |e verfasserin |4 aut | |
| 700 | 1 | |a Metzger, Jean P. |e verfasserin |4 aut | |
| 700 | 1 | |a Bates, John |e verfasserin |4 aut | |
| 700 | 1 | |a Cornelius, Cintia |e verfasserin |4 aut | |
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