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Figure 7 | BMC Ecology

Figure 7

From: Scale-dependent effects of habitat area on species interaction networks: invasive species alter relationships

Figure 7

Relationship between forest area and network metrics for (a, b) number of interaction links, (c, d) connectance and (e, f) nestedness. Data for the radius with the highest correlation coefficients (Figure 6) regarding the effects of forest area are shown. Left (a, c, e) and right (b, d, f) figures are based on data including exotic species and excluding associations with exotics, respectively. Code numbers next to the circles indicate study site codes, which are provided in Table 1. Lines represent linear regressions: (a) number of interaction links (I), log(I) = 5.0660 – 1.52333*log(FA), r2 = 0.56, F1,5 = 6.32, p = 0.054; (b); log(I) = 2.8264 + 1.5556*log(FA), r2 = 0.59, F1,5 = 7.23, p = 0.043; (c) connectance (C), arcsin C = 0.4574 – 0.1231*log(FA), r2 = 0.34, F1,5 = 2.59, p = 0.169; (d) arcsin C = 0.4758 – 0.2245*log(FA), r2 = 0.53, F1,5 = 5.69, p = 0.063; (e) nestedness (NODF), arcsin N O D F / 100 = 0.5002 + 0.5195*log(FA), r2 = 0.53, F1,5 = 5.57, p = 0.065; (f), arcsin N O D F / 100 = 0.3963 + 0.2718*log(FA), r2 = 0.71, F1,5 = 12.1, p = 0.018.

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