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Título : Reciprocal specialization in ecological networks
Autor : Joppa, Lucas N., Bascompte, Jordi, Montoya, José M., Solé, Ricard V., Sanderson, Jim, Pimm, Stuart L.
Palabras clave : Ecological network
food web
null model
trophic level
Fecha de publicación : Sep-2009
Editor: Blackwell Publishing
Resumen: Theories suggest that food webs might consist of groups of species forming ‘blocks’, ‘compartments’ or ‘guilds’. We consider ecological networks – subsets of complete food webs – involving species at adjacent trophic levels. Reciprocal specializations occur when (say) a pollinator (or group of pollinators) specializes on a particular flower species (or group of such species) and vice versa. Such specializations tend to group species into guilds. We characterize the level of reciprocal specialization for both antagonistic interactions – particularly parasitoids and their hosts – and mutualistic ones – such as insects and the flowers that they pollinate. We also examine whether trophic patterns might be ‘palimpsests’ – that is, there might be reciprocal specialization within taxonomically related species within a network, but these might be obscured when these relationships are combined. Reciprocal specializations are rare in all these systems when tested against the most conservative null model.
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DOI: 10.1111/j.1461-0248.2009.01341.x
Citación : Ecology Letters, (2009) 12: 961–969
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