The relationship between species’ traits and their functional roles
None of the bird traits that we investigated were significantly related to the functional roles of species in the network structure (Fig.5). The relationships between the network parameters and fruit traits showed that only fruit color had significant effects on species strength (Pearson correlation coefficient: r=0.666, P =0.013) (Fig.6), and the species strength of plants with black fruits (2.69±1.25) was significantly greater than that of plants with red fruits (0.358±0.057). Thus, only fruit color could explain species strength; that is, plants with black fruits had greater species strength.
Fig.5 Correlation matrix between network parameters and bird traits
Fig.6 Correlation matrix between network parameters and plant traits