cambiar la visibilidad
Buscar en resultados:

Seleccionar todo    Deseleccionar todos
 |   | 
  Grabar Enlaces
Autor (up) Gómez, J.M.; García, D.; Zamora, R. url  openurl
  Título Impact of vertebrate acorn- and seedling-predators on a Mediterranean Quercus pyrenaica forest Tipo Journal Article
  Año 2003 Publicación Forest Ecology and Management Abreviaturas de la publicación  
  Volumen 180 Issue 1-3 Páginas 125-134  
  Palabras clave Forest regeneration; Mediterranean mountains; Postdispersal seed predation; Quercus pyrenaica; Seedling predation; Seedling recruitment  
  Resumen We have experimentally investigated the impact of biotic factors, acting at the seed and seedling stages, on a Quercus pyrenaica forest in the Sierra Nevada mountains (SE Spain). We monitored the natural establishment of the oak for 3 years in two forest plots and two shrubland plots, by counting seedlings and juveniles. In addition, we established several experiments in these plots to examine acorn and seedling survival, while also considering the microhabitat effect on survival probability. Dispersed acorns were quickly consumed by several species of predators, particularly wild boar (Sus scrofa) and woodmouse (Apodemus sylvaticus). Less than 4% of the experimental acorns survived to produce seedlings, even when they were buried 4 cm in soil, simulating caches. No effect of microhabitat was found on predation, and thus no safe site appears to exist for Q. pyrenaica acorns in the study area. Some 98% of the 1000 experimental seedlings were killed by herbivores, notably woodmice, wild boar, and domestic and wild ungulates. Seedling survival varied spatially, being significantly higher under shrubs (4%) than in any other microhabitat (less than 0.5%). Both acorn and seedling survival were much lower in the shrublands than in the forests. In shrubland plots, the main agent of seedling mortality was trampling by domestic ungulates foraging in herds. This study suggests that the regeneration of Q. pyrenaica forests in Mediterranean mountains can be limited by herbivores acting at several life-history stages.  
  Autor corporativo Tesis  
  Editorial Lugar de publicación Editor  
  Idioma Idioma del resumen Título Original  
  Editor de la Serie Título de la serie Título abreviado de la serie  
  Tomo (volumen) dentro de la serie Issue dentro de la Serie Edición  
  ISSN 0378-1127 ISBN Medio  
  Area OBSERVATORIO; ECOSISTEMAS Expedición Conferencia  
  Notas Robledales Confirmado no  
  Número de llamada UGR-CEAMA @ ajpelu @ Número de serie 1054  
Enlace permanente a la presente acta
Seleccionar todo    Deseleccionar todos
 |   | 

Save Citations:
Export Records: