Effects of habitat characteristics and trophic level on the structure of plant-frugivore networks.

Species specialisation (d'), network specialisation (H2'), interaction diversity and robustness of plant-frugivore networks (n = 9) in relation to fruit abundance, fruiting plant species richness, canopy cover (%) and trophic level (plant vs. frugivore). To investigate effects on species specialization, trophic level was nested within plot in a linear mixed effect model; effects on all other dependent variables were analysed using linear models. Given are R2, t and P values, if applicable. Note: all significant or marginally significant P values are highlighted in bold.