Figure 5. The effect of network types and disturbance on specialisation of ant-plant interactions as measured using four different specialisation indices. (a) H2’ network specialisation. (b) Standardised effects size of deviation of observed H2’ from that generated using a null model (H2’ z-score). (c) Degree of ant specialisation on plants in terms of plant partner phylogenetic relatedness (dsi*ants). (d) Degree of plant specialisation on ants in terms of ant partner phylogenetic relatedness (dsi*plants). Different letters indicate significant differences in specificity between network types or levels of disturbance, although note that for panel (a) there is also a significant interaction involving interaction type (See Fig 4a), and so the main effect should be interpreted with caution.