|
Descripción
|
|
|---|---|
| In a world subjected to increasing human impacts on biodiversity, understanding how populations persist under severe fragmentation conditions is a hot research theme in ecology and conservation biology. Simulation studies suggest that floaters (non-breeding but sexually mature individuals) may buffer avian populations from extinction by replacing the lost breeders, but there are no empirical studies that assess this hypothesis in fragmented habitats. We addressed this issue in a fragmented landscape occupied by middle spotted woodpeckers (Dendrocopos medius) in NW Spain (2000-2014). The number of occupied patches was relatively stable (15-24 of 101 patches annually) because extinction was balanced by recolonization. After controlling for population size and habitat quality, local populations in patches with floaters were 8 times less likely to become extinct in subsequent years than populations in patches without floaters. Some floaters replaced the lost breeders, suggesting than floaters may constitute pools of non-territorial individuals that enhance population persistence by promoting population turnover. In addition to a preference for large and high quality patches, floaters were more likely to occupy high-populated patches, which may suggest that a lack of conspecific cues necessary for floater settlement and population turnover is behind the decline of small populations in fragmented habitats. | |
|
Internacional
|
Si |
|
Nombre congreso
|
10th Conference of the European Ornithologist''s Union |
|
Tipo de participación
|
960 |
|
Lugar del congreso
|
Badajoz |
|
Revisores
|
Si |
|
ISBN o ISSN
|
000-0000-0000-0-0 |
|
DOI
|
|
|
Fecha inicio congreso
|
24/08/2015 |
|
Fecha fin congreso
|
28/08/2015 |
|
Desde la página
|
175 |
|
Hasta la página
|
175 |
|
Título de las actas
|
10th Conference of the European Ornithologist''s Union |