Local drivers of the structure of a tropical bird ‑ seed dispersal network

One of the major challenges in ecology is to understand the relative importance of neutral- and niche-based processes structuring species interactions within communities. The concept of neutral-based processes posits that network structure is a result of interactions between species based on their a...

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Otros Autores: Machado de Souza, Tiago, Pamplona Campos, Ricardo, Devoto, Mariano, Galarda Varassin, Isabela
Formato: Artículo
Lenguaje:Inglés
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Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2019machadodesouza.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
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245 1 0 |a Local drivers of the structure of a tropical bird ‑ seed dispersal network 
520 |a One of the major challenges in ecology is to understand the relative importance of neutral- and niche-based processes structuring species interactions within communities. The concept of neutral-based processes posits that network structure is a result of interactions between species based on their abundance. On the other hand, niche-based processes presume that network structure is shaped by constraints to interactions. Here, we evaluated the relative importance of neutral-based process, represented by species’ abundance (A) and fruit production (F) models, and niche-based process, represented by spatial overlap (S), temporal overlap (T) and morphological barrier (M) models, in shaping the structure of a bird-seed dispersal network from the Brazilian Atlantic Forest. We evaluated the ability of each model, singly or in combination, to predict the general structure [represented by connectance, nestedness (NODF), weight nestedness (WNODF), interaction evenness and complementary specialization] and microstructure of the network (i.e., the frequency of pairwise interactions). Only nestedness (both NODF and WNODF) was predicted by at least one model. NODF and WNODF were predicted by a neutral-based process (A), by a combination of niche-based processes (ST and STM) and by both neutral- and niche-based processes (AM). NODF was also predicted by F and FM model. Regarding microstructure, temporal overlap (T) was the most parsimonious model able to predict it. Our findings reveal that a combination of neutral- and niche-based processes is a good predictor of the general structure (NODF and WNODF) of the bird-seed dispersal network and a niche-based process is the best predictor of the network’s microstructure. 
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700 1 |a Machado de Souza, Tiago  |u Universidade Federal do Paraná. Departamento de Botânica. Laboratório de Interações e Biologia Reprodutiva. Centro Politécnico, Jardim das Américas. Curitiba, Brazil.  |u Universidade Federal do Paraná. Programa de Pós‑Graduação em Ecologia e Conservação. Centro Politécnico, Jardim das Américas. Curitiba, Brazil.  |u Mater Natura-Instituto de Estudos Ambientais. Curitiba, Brazil.  |u Instituto de Estudos Ambientais do Paraná (IEAP). Curitiba, Brazil.  |9 69202 
700 1 |a Pamplona Campos, Ricardo  |u Universidade Federal do Paraná. Departamento de Botânica. Laboratório de Interações e Biologia Reprodutiva. Centro Politécnico, Jardim das Américas. Curitiba, Brazil.  |9 69203 
700 1 |9 11883  |a Devoto, Mariano  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Recursos Naturales y Ambiente.Cátedra de Botánica General. Buenos Aires, Argentina.  |u CONICET - Universidad de Buenos Aires. Buenos Aires, Argentina. 
700 1 |a Galarda Varassin, Isabela  |u Universidade Federal do Paraná. Departamento de Botânica. Laboratório de Interações e Biologia Reprodutiva. Centro Politécnico, Jardim das Américas. Curitiba, Brazil.  |u Universidade Federal do Paraná. Programa de Pós‑Graduação em Ecologia e Conservação. Centro Politécnico, Jardim das Américas. Curitiba, Brazil.  |9 69204 
773 0 |t Oecologia  |w (AR-BaUFA)SECS000133  |g vol.189, no.2 (2019), p.421-433, grafs. 
856 |f 2019machadodesouza  |i En reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2019machadodesouza.pdf  |x ARTI201908 
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