Bird-flower visitation networks in the Galápagos unveil a widespread interaction release
© 2015 Macmillan Publishers Limited. Owing to food scarcity and to the high densities that vertebrates often reach on islands, typical insect-and seed-eaters widen their feeding niche and interact with a greater fraction of species than their mainland counterparts. This phenomenon, coined here 'interaction release', has been previously reported for single species but never for an entire community. During 4 years, we gathered data on bird-flower visitation on 12 Galápagos islands. We show that all sampled land birds exploit floral resources and act as potential pollinators across the entire archipelago, in all major habitats and all year round. Although species and link composition varies among islands, strong interaction release takes place on all islands, making their bird-flower network highly generalized. Interaction release is crucial to the survival of native birds but simultaneously threatens the unique biodiversity of this archipelago, as the birds also visit invading plants, likely facilitating their integration into pristine native communities.
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Nature Publishing Group
2015-03-10
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Online Access: | http://hdl.handle.net/10261/125757 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100007406 |
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dig-ipna-es-10261-1257572020-05-21T12:16:21Z Bird-flower visitation networks in the Galápagos unveil a widespread interaction release Traveset, Anna Olesen, Jens M. Nogales, Manuel Vargas, Pablo Jaramillo, Patricia Antolín, Elena Trigo, María del Mar Heleno, Rubén H. Ministerio de Economía y Competitividad (España) Fundación BBVA © 2015 Macmillan Publishers Limited. Owing to food scarcity and to the high densities that vertebrates often reach on islands, typical insect-and seed-eaters widen their feeding niche and interact with a greater fraction of species than their mainland counterparts. This phenomenon, coined here 'interaction release', has been previously reported for single species but never for an entire community. During 4 years, we gathered data on bird-flower visitation on 12 Galápagos islands. We show that all sampled land birds exploit floral resources and act as potential pollinators across the entire archipelago, in all major habitats and all year round. Although species and link composition varies among islands, strong interaction release takes place on all islands, making their bird-flower network highly generalized. Interaction release is crucial to the survival of native birds but simultaneously threatens the unique biodiversity of this archipelago, as the birds also visit invading plants, likely facilitating their integration into pristine native communities. We thank the BBVA foundation for financing the expeditions and research in Galápagos as well as the Charles Darwin Foundation and Galápagos National Park for logistic support. This manuscript is part of the project CGL2013-44386-P financed by the Ministerio de Hacienda y Competitividad of the Spanish Government Peer Reviewed 2015-11-25T13:20:58Z 2015-11-25T13:20:58Z 2015-03-10 2015-11-25T13:20:58Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1038/ncomms7376 issn: 2041-1723 Nature Communications 6(10 march): 6376 (2015) http://hdl.handle.net/10261/125757 10.1038/ncomms7376 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100007406 Postprint http://dx.doi.org/10.1038/ncomms7376 Sí open Nature Publishing Group |
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© 2015 Macmillan Publishers Limited. Owing to food scarcity and to the high densities that vertebrates often reach on islands, typical insect-and seed-eaters widen their feeding niche and interact with a greater fraction of species than their mainland counterparts. This phenomenon, coined here 'interaction release', has been previously reported for single species but never for an entire community. During 4 years, we gathered data on bird-flower visitation on 12 Galápagos islands. We show that all sampled land birds exploit floral resources and act as potential pollinators across the entire archipelago, in all major habitats and all year round. Although species and link composition varies among islands, strong interaction release takes place on all islands, making their bird-flower network highly generalized. Interaction release is crucial to the survival of native birds but simultaneously threatens the unique biodiversity of this archipelago, as the birds also visit invading plants, likely facilitating their integration into pristine native communities. |
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Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Traveset, Anna Olesen, Jens M. Nogales, Manuel Vargas, Pablo Jaramillo, Patricia Antolín, Elena Trigo, María del Mar Heleno, Rubén H. |
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artículo |
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Traveset, Anna Olesen, Jens M. Nogales, Manuel Vargas, Pablo Jaramillo, Patricia Antolín, Elena Trigo, María del Mar Heleno, Rubén H. |
spellingShingle |
Traveset, Anna Olesen, Jens M. Nogales, Manuel Vargas, Pablo Jaramillo, Patricia Antolín, Elena Trigo, María del Mar Heleno, Rubén H. Bird-flower visitation networks in the Galápagos unveil a widespread interaction release |
author_sort |
Traveset, Anna |
title |
Bird-flower visitation networks in the Galápagos unveil a widespread interaction release |
title_short |
Bird-flower visitation networks in the Galápagos unveil a widespread interaction release |
title_full |
Bird-flower visitation networks in the Galápagos unveil a widespread interaction release |
title_fullStr |
Bird-flower visitation networks in the Galápagos unveil a widespread interaction release |
title_full_unstemmed |
Bird-flower visitation networks in the Galápagos unveil a widespread interaction release |
title_sort |
bird-flower visitation networks in the galápagos unveil a widespread interaction release |
publisher |
Nature Publishing Group |
publishDate |
2015-03-10 |
url |
http://hdl.handle.net/10261/125757 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/100007406 |
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