Seed dispersal networks in the Galápagos and the consequences of alien plant invasions

Alien plants are a growing threat to the Galápagos unique biota. We evaluated the impact of alien plants on eight seed dispersal networks from two islands of the archipelago. Nearly 10 000 intact seeds from 58 species were recovered from the droppings of 18 bird and reptile dispersers. The most disp...

Descripción completa

Detalles Bibliográficos
Autores: Heleno, Rubén H., Olesen, Jens M., Nogales, Manuel, Vargas, Pablo, Traveset, Anna
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/110941
Acceso en línea:http://hdl.handle.net/10261/110941
Access Level:acceso abierto
Palabra clave:Mutualistic interactions
Frugivory
Oceanic islands
Ornithochory
Saurochory
Exotics
id ES_a9158fed550bdeda3f2db0872a2e03ee
oai_identifier_str oai:digital.csic.es:10261/110941
network_acronym_str ES
network_name_str España
repository_id_str
spelling Seed dispersal networks in the Galápagos and the consequences of alien plant invasionsHeleno, Rubén H.Olesen, Jens M.Nogales, ManuelVargas, PabloTraveset, AnnaMutualistic interactionsFrugivoryOceanic islandsOrnithochorySaurochoryExoticsAlien plants are a growing threat to the Galápagos unique biota. We evaluated the impact of alien plants on eight seed dispersal networks from two islands of the archipelago. Nearly 10 000 intact seeds from 58 species were recovered from the droppings of 18 bird and reptile dispersers. The most dispersed invaders were Lantana camara, Rubus niveus and Psidium guajava, the latter two likely benefiting from an asynchronous fruit production with most native plants, which facilitate their consumption and spread. Lava lizards dispersed the seeds of 27 species, being the most important dispersers, followed by small ground finch, two mockingbirds, the giant tortoise and two insectivorous birds. Most animals dispersed alien seeds, but these formed a relatively small proportion of the interactions. Nevertheless, the integration of aliens was higher in the island that has been invaded for longest, suggesting a time-lag between alien plant introductions and their impacts on seed dispersal networks. Alien plants become more specialized with advancing invasion, favouring more simplified plant and disperser communities. However, only habitat type significantly affected the overall network structure. Alien plants were dispersed via two pathways: dryfruited plants were preferentially dispersed by finches, while fleshy fruited species were mostly dispersed by other birds and reptiles. © 2012 The Author(s) Published by the Royal Society. All rights reserved.We are grateful to the Fundacio´n BBVA (Spain) for financing this project and to the Charles Darwin Foundation and the Gala´pagos National Park (Ecuador) for crucial logistical support in the archipelagoPeer ReviewedRoyal Society (Great Britain)Fundación BBVACharles Darwin FoundationParque Nacional GalápagosFundación BBVA2015201520132015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/110941reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1098/rspb.2012.2112info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1109412026-05-22T06:33:51Z
dc.title.none.fl_str_mv Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
title Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
spellingShingle Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
Heleno, Rubén H.
Mutualistic interactions
Frugivory
Oceanic islands
Ornithochory
Saurochory
Exotics
title_short Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
title_full Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
title_fullStr Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
title_full_unstemmed Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
title_sort Seed dispersal networks in the Galápagos and the consequences of alien plant invasions
dc.creator.none.fl_str_mv Heleno, Rubén H.
Olesen, Jens M.
Nogales, Manuel
Vargas, Pablo
Traveset, Anna
author Heleno, Rubén H.
author_facet Heleno, Rubén H.
Olesen, Jens M.
Nogales, Manuel
Vargas, Pablo
Traveset, Anna
author_role author
author2 Olesen, Jens M.
Nogales, Manuel
Vargas, Pablo
Traveset, Anna
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Fundación BBVA
Charles Darwin Foundation
Parque Nacional Galápagos
Fundación BBVA
dc.subject.none.fl_str_mv Mutualistic interactions
Frugivory
Oceanic islands
Ornithochory
Saurochory
Exotics
topic Mutualistic interactions
Frugivory
Oceanic islands
Ornithochory
Saurochory
Exotics
description Alien plants are a growing threat to the Galápagos unique biota. We evaluated the impact of alien plants on eight seed dispersal networks from two islands of the archipelago. Nearly 10 000 intact seeds from 58 species were recovered from the droppings of 18 bird and reptile dispersers. The most dispersed invaders were Lantana camara, Rubus niveus and Psidium guajava, the latter two likely benefiting from an asynchronous fruit production with most native plants, which facilitate their consumption and spread. Lava lizards dispersed the seeds of 27 species, being the most important dispersers, followed by small ground finch, two mockingbirds, the giant tortoise and two insectivorous birds. Most animals dispersed alien seeds, but these formed a relatively small proportion of the interactions. Nevertheless, the integration of aliens was higher in the island that has been invaded for longest, suggesting a time-lag between alien plant introductions and their impacts on seed dispersal networks. Alien plants become more specialized with advancing invasion, favouring more simplified plant and disperser communities. However, only habitat type significantly affected the overall network structure. Alien plants were dispersed via two pathways: dryfruited plants were preferentially dispersed by finches, while fleshy fruited species were mostly dispersed by other birds and reptiles. © 2012 The Author(s) Published by the Royal Society. All rights reserved.
publishDate 2013
dc.date.none.fl_str_mv 2013
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/110941
url http://hdl.handle.net/10261/110941
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1098/rspb.2012.2112
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Royal Society (Great Britain)
publisher.none.fl_str_mv Royal Society (Great Britain)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869415972426743808
score 15,811543

Similares en LA Referencia