Summary of the statistical results obtained by the Kruskal-Wallis and Kramer (Nemenyi) tests on the effect of the substrata type on the root system morphology of <i>Posidonia oceanica</i> (n = 5).

The numbers in bold indicate significant effects (p < 0.01). S: sand treatment, S+P: sand+pebble treatment, P: pebble treatment and F: fibreglass treatment.加粗数字代表具有统计学显著性的效应（p < 0.01）。S：砂石处理组，S+P：砂石+砾石处理组，P：砾石处理组，F：玻璃纤维处理组。