Catálogo CEIBA de la Biblioteca Central de FAUBA


Vista normal Vista MARC Vista ISBD

Predicting the consequences of disperser extinction : richness matters the most when abundance is low

Colaborador(es): Rumeu, Beatriz. Centre for Functional Ecology, Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, 3000-456 Coimbra, Portugal - E-mail: bea.rumeu@gmail.com | Devoto, Mariano. Facultad de Agronomía, Universidad de Buenos Aires, Av. San Maríın 4453 C1417DSE Buenos Aires, Argentina | Traveset, Anna. Mediterranean Institute of Advanced Studies (CSIC-UIB), Terrestrial Ecology Group, C/Miquel Marqués 21, 07190-Esporles, Mallorca, Balearic Islands, Spain | Olesen, Jens M. Department of Bioscience, Aarhus University, DK-8000 Aarhus C, Denmark | Vargas, Pablo. Royal Botanical Garden Madrid (CSIC-RJB), Plaza de Murillo, 2, 28014 Madrid, Spain | Nogales, Manuel. Island Ecology and Evolution Research Group (CSIC-IPNA), 38206 La Laguna, Tenerife, Canary Islands, Spain | Heleno, Ruben. Centre for Functional Ecology, Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, 3000-456 Coimbra, Portugal.
ISSN: 1365-2435.Tipo de material: Recurso electrónico. Artículos y capítulos.Tema(s): BIODIVERSITY LOSS | BIOTIC HOMOGENIZATION | DEFAUNATION | DISPERSAL FAILURE | ECOLOGICAL NETWORKS | ECOSYSTEM FUNCTION | GALAPAGOS ISLANDS | MUTUALISM DISRUPTION | OCEANIC ISLANDS | SEED DISPERSAL SERVICE | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR En: Functional Ecology Vol.31, no.10 (2017), p.1910-1920, grafs., tbls.Resumen: 1. The ongoing biodiversity crisis entails the concomitant loss of species and the ecological services they provide. Global defaunation, and particularly the loss of frugivores, may negatively affect the seed dispersal of fleshy-fruited plant species, with predictable stronger impacts in simplified communities such as those on oceanic islands. However, logistical difficulties have hindered the experimental and theoretical need to disentangle the roles of species identity, richness (i.e. number of species) and abundance. Consequently, studies to date have focused exclusively on the loss of species richness leaving us largely ignorant regarding how species identity and abundance affect the loss of ecosystem functions. 2. Here, we applied a network approach to disentangle the effects of disperser abundance, richness and identity on the seed dispersal service provided by frugivores to the Galapagos plant community. 3. We found that both abundance and richness of the dispersers significantly affect the function of seed dispersal and that richness becomes increasingly important as disperser abundance declines. Extinction simulations revealed that the order of species loss has profound implications to the plant community. On the one hand, abundant generalist dispersers like the Galapagos lizards, can mitigate the loss of specialized dispersers. On the other hand, specific threats affecting key dispersers can lead to the rapid collapse of the community-level dispersal services. 4. Our results suggest that the identity of the disperser species lost can have a large effect on the number of plant species dispersed, and generalist species are essential to the persistence of the community dispersal service. Both abundance and species richness of seed dispersers are key and synergistic drivers of the number of plant species dispersed. Consequently, the coupled negative effect of population declines and species extinctions in frugivore assemblages may lead to an accelerated loss of the seed dispersal function.
Etiquetas de esta biblioteca: No hay etiquetas de esta biblioteca para este título. Ingresar para agregar etiquetas.
    valoración media: 0.0 (0 votos)

1. The ongoing biodiversity crisis entails the concomitant loss of species and the ecological services they provide.
Global defaunation, and particularly the loss of frugivores, may negatively affect the seed dispersal of fleshy-fruited plant species, with predictable stronger impacts in simplified communities such as those on oceanic islands.
However, logistical difficulties have hindered the experimental and theoretical need to disentangle the roles of species identity, richness (i.e. number of species) and abundance.
Consequently, studies to date have focused exclusively on the loss of species richness leaving us largely ignorant regarding how species identity and abundance affect the loss of ecosystem functions.
2. Here, we applied a network approach to disentangle the effects of disperser abundance, richness and identity on the seed dispersal service provided by frugivores to the Galapagos plant community.
3. We found that both abundance and richness of the dispersers significantly affect the function of seed dispersal and that richness becomes increasingly important as disperser abundance
declines. Extinction simulations revealed that the order of species loss has profound implications to the plant community.
On the one hand, abundant generalist dispersers like the Galapagos lizards, can mitigate the loss of specialized dispersers. On the other hand, specific threats affecting key dispersers can lead to the rapid collapse of the community-level dispersal services.
4. Our results suggest that the identity of the disperser species lost can have a large effect on the number of plant species dispersed, and generalist species are essential to the persistence of the community dispersal service.
Both abundance and species richness of seed dispersers are
key and synergistic drivers of the number of plant species dispersed. Consequently, the coupled negative effect of population declines and species extinctions in frugivore assemblages may lead to an accelerated loss of the seed dispersal function.

No hay comentarios para este ítem.

Ingresar a su cuenta para colocar un comentario.

Av. San Martín 4453 - 1417 – CABA – Argentina.
Sala de lectura de Planta Baja: bibliote@agro.uba.ar (54 11) 5287-0013
Referencia: referen@agro.uba.ar (54 11) 5287-0418
Hemeroteca: hemerote@agro.uba.ar (54 11) 5287-0218