Table 2 Results of the co-occurrence analysis aimed at identifying the transitions between two colonizing communities.

In italics the transitions identified by the probabilistic analysis. In bold, the transitions identified in the field; * = the transitions that were not identified by the qualitative ecological assessment in the field; += the transitions that were not identified by the statistical analysis). Observed transitions = the number of times the transitions were observed; Observed co-occurrence = the number of times the two communities listed in the column ‘Transitions’ were found in the same site; Expected co-occurrence = the number of times two communities were expected to be found together according to combinatorics; p = p-value that expresses the null expectation to find together the two communities a number of times equal or higher than the expected co-occurrence; Weight = interaction strength between the two communities, computed as: (Observed co-occurrence − Expected co-occurrence)/ min(N1, N2), with N1 and N2 being, respectively, the number of sites where the two target communities were found.

Search