Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/38512
Share/Impact:
Título : Build-up mechanisms determining the topology of mutualistic networks
Autor : Guimarães, Paulo R., Machado, Glauco, Aguiar, Marcus A.M., Jordano, Pedro, Bascompte, Jordi, Pinheiro, Aluisio, Furtado dos Reis, Sergio
Palabras clave : Complex networks
Forbidden links
Mutualisms
Plant–animal interactions
Pollination
Seed dispersal
Small networks
Species richness
Fecha de publicación : Nov-2007
Editor: Elsevier
Citación : Journal of Theoretical Biology 249 (2007) 181–189
Resumen: The frequency distribution of the number of interactions per species (i.e., degree distribution) within plant–animal mutualistic assemblages often decays as a power-law with an exponential truncation. Such a truncation suggests that there are ecological factors limiting the frequency of supergeneralist species. However, it is not clear whether these patterns can emerge from intrinsic features of the interacting assemblages, such as differences between plant and animal species richness (richness ratio). Here, we show that high richness ratios often characterize plant–animal mutualisms. Then, we demonstrate that exponential truncations are expected in bipartite networks generated by a simple model that incorporates build-up mechanisms that lead to a high richness ratio. Our results provide a simple interpretation for the truncations commonly observed in the degree distributions of mutualistic networks that complements previous ones based on biological effects.
Versión del editor: http://www.sciencedirect.com/science/article/pii/S0022519307003797
URI : http://hdl.handle.net/10261/38512
DOI: 10.1016/j.jtbi.2007.08.004
Appears in Collections:(EBD) Artículos

Files in This Item:
File Description SizeFormat 
gui.doc2,1 MBMicrosoft WordView/Open
Show full item record
 
CSIC SFX LinksSFX Query


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