Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/25247
Title: Endozoochory largely outweighs epizoochory in migrating passerines
Authors: Costa, Jose M. 
Ramos, Jaime A. 
da Silva, Luís P. 
Timoteo, Sergio 
Araujo, Pedro M. 
Felgueiras, Marsial S. 
Rosa, Antonio 
Matos, Claudia 
Encarnaçao, Paulo 
Tenreiro, Paulo Q. 
Heleno, Ruben 
Keywords: Long-Distance Dispersal; Seed Dispersal; Farmland Birds; Exotic Seeds; Feathers; Islands
Issue Date: 2014
Publisher: Nordic Society Oikos
Keywords: Long-Distance Dispersal; Seed Dispersal; Farmland Birds; Exotic Seeds; Feathers; Islands
Issue Date: 2014
Publisher: Nordic Society Oikos
Abstract: Fruits and seeds are critical food sources for many European passerines during the autumn migration, which in turn contribute to disperse seeds either internally, i.e. after ingestion (endozoochory), or externally, when seeds adhere to the body surface (epizoochory). Despite the recognized importance of birds as seed dispersers, the vast majority of studies focused on endozoochory while the external transport of seeds is frequently invoked as being potentially important, but remains largely unexplored. Th is is particularly important during the post-breeding migration of passerines, the most ubiquitous and diverse movement of potential seed carriers across Europe and into Africa, which coincides with the fruiting peak of many plant species (August – October). Our aim was to evaluate the role of migrating birds as potential long-distance seed dispersers, and comparing the prevalence of epizoochory and endozoochory during post-breeding migration. We sampled 926 wild birds in nine locations in Portugal, and retrieved 1833 seeds of 19 plant species dispersed internally and only three seeds externally attached to three birds ( Serinus serinus , Locustella naevia and Turdus merula ), showing an endozoochory prevalence 85 times higher than that of epizoochory. Migrating and non-migrating passerines dispersed seeds equally. While two of the seeds transported externally had specifi c adaptations to epizoochory, namely spines ( Torilis arvensis ) and hooks ( Galium aparine ), the third is a large seed from a fl eshy-fruited plant, Frangula alnus (i.e. typical endozoochorous syndrome). Th ese seeds were found on bird species with diff erent diets, but similar behaviour (ground foragers) and in similar habitats (open agro-ecosystems). Our results highlight the strong role of migrating passerines as potentially longdistance seed dispersers and show that, at least in the autumn, the prevalence of epizoochory is several orders of magnitude lower than that of endozoochory.
URI: http://hdl.handle.net/10316/25247
ISSN: 0908-8857
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
j.1600-048X.2013.00271.x.pdf329.17 kBAdobe PDFView/Open
Show full item record

Page view(s)

83
checked on Aug 21, 2019

Download(s)

39
checked on Aug 21, 2019

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.