Table 1.
EMS analysis conducted for soft‐sediment benthic invertebrate metacommunity, for all sites (n = 285) and finer spatial extent longitudinal groupings (Long 1–3, each n = 95). Coherence: the number of embedded absences (Abs) significance (P), relative to a simulated null matrix (Mean) and its standard deviation (SD). Bold denotes significant coherence (<0.05), a prerequisite to consider turnover and boundary clumping. Turnover: the number of species replacements (Repl) its significance (P) relative to simulated null matrices (Mean) and its standard deviation (SD). Boundary clumping: based on the Morisita's index (index) and its significance using a chi‐squared test
| Coherence | Turnover | Boundary clumping | Metacommunity pattern | df | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Abs | P | Mean | SD | Repl | P | Mean | SD | Morisita's index | P | ||||||
| CA 1 | |||||||||||||||
| All sites | 5640 | 0.198 | 6216 | 447.6 | 765412 | 0.381 | 605739 | 182100.7 | 4.697 | 0.000 | Random | 37 | |||
| Long 1 | 1132 | 0.000 | 1628 | 116.2 | + | 121682 | 0.062 | 78939 | 22920.6 | + | 2.580 | 0.000 | >1 | Quasi‐Clementsian | 31 |
| Long 2 | 1037 | 0.000 | 1577 | 148.2 | + | 96276 | 0.334 | 74780 | 22231.7 | + | 2.556 | 0.000 | >1 | Quasi‐Clementsian | 32 |
| Long 3 | 1015 | 0.118 | 1196 | 115.7 | 53597 | 0.301 | 40444 | 12711.5 | 3.850 | 0.000 | Random | 25 | |||
| CA 2 | |||||||||||||||
| All sites | 4593 | 0.000 | 6249 | 467.4 | + | 758403 | 0.372 | 595119 | 182932.0 | + | 2.910 | 0.000 | >1 | Quasi‐Clementsian | 37 |
| Long 1 | 1358 | 0.014 | 1634 | 112.5 | + | 80987 | 0.859 | 76944 | 22837.5 | + | 4.234 | 0.000 | >1 | Quasi‐Clementsian | 31 |
| Long 2 | 1039 | 0.000 | 1572 | 148.1 | + | 74807 | 0.974 | 75557 | 23112.9 | − | 3.304 | 0.000 | >1 | Quasi‐nested clumped species loss | 32 |
| Long 3 | 1021 | 0.129 | 1197 | 116.0 | 50966 | 0.365 | 39886 | 12221.6 | 2.430 | 0.000 | Random | 25 | |||