English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/22509
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Frugivory and seed dispersal by the lizard Gallotia galloti (Lacertidae in a xeric habitat of the Canary Islands

AutorValido, Alfredo ; Nogales, Manuel
Fecha de publicación1994
EditorWiley-Blackwell
CitaciónOikos 70: 403-411 (1994)
Journal of Applied Polymer Science
ResumenThe relationship between an endemic lizard (Gallotia galloti) and plants with fleshy fruits was examined in a xeric habitat on the island of Tenerife, Canary Islands. An analysis of 441 droppings collected in May 1991, showed that fruits are an important item in the diet of this amnivorous lizard; 92% and 56% of droppings contained fruits from two different areas. Fruits of seven plant species were found in the droppings: Ruhia fruticosa, Neochamalea pulverulenta, Withania aristata, Lyrium untricatum, Atriplex semibaccata, Opuntia dillenii and Scilla et haemorrhoidalis. The number of fruit species consumed at each area by G. galloti was related to their availability. Seed viability did not differ between control seeds and seeds from the droppings, except for N. pulverulenta and L. intricatum, where viability was higher in control seeds. The gut passage of seeds significantly reduced the germination of R. fruticosa and N. pulverulenta, increased that of W. aristata while no differences were found for the rest. Gallotia galloti preferred rocky and grassy sites with less open fround and more shrubcover (>50 cm in height). This should produce a non-random seed shadow in the habitats, potentially affecting the distribution of species with fleshy fruits. Omnivorous lizards on islands can actas important seed disperses over short distances for plant species with fleshy fruits, actively influencing both their relative abundance and vegetation structure in serie habitats.
URIhttp://hdl.handle.net/10261/22509
ISSN0021-8995
Aparece en las colecciones: (IPNA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
OKS-1994-70-403.pdf389,67 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.