Observatorio de I+D+i UPM

Memorias de investigación
Ponencias en congresos:
Floaters buffer the extinction risk of bird populations in fragmented habitats
Año:2015
Áreas de investigación
  • Biología vegetal, animal y ecología,
  • Zoología aplicada,
  • Etología animal,
  • Biología ambiental,
  • Biología de poblaciones,
  • Causas y mecanismos de la pérdida de biodiversidad,
  • Gestión de ecosistemas,
  • Conservación de la naturaleza
Datos
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
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Hugo Robles Díez (Universidad de A Coruña)
  • Autor: Carlos Ciudad Trilla (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Ecología y Gestión Forestal Sostenible
  • Departamento: Sistemas y Recursos Naturales
S2i 2022 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)