Table 1. Differences in the survival of four floodplain meadow species among five age groups.
species | family | micro-habitat | EIV m | chisq | df | p | survival differences | ||||
---|---|---|---|---|---|---|---|---|---|---|---|
age2 | age4 | age6 | age8 | noFl | |||||||
Sanguisorba officinalis L. | Rosaceae | wet | 7 ~ | 31.5 | 4 | <0.001 | a | a | b | c | b |
Sanguisorba minor Scop. | Rosaceae | dry | 3 | 94.5 | 4 | <0.001 | a | b | c | d | c |
Veronica maritima L. | Plantaginaceae | wet | 8 ~ | 0.0 | 4 | 1 | a | a | a | a | a |
Veronica teucrium L. | Plantaginaceae | dry | 3 | 66.2 | 4 | <0.001 | ab | a | c | b | c |
Differences were tested using a Wilcoxon-Mann-Whitney test (chi-square statistic), and subsequently, each paired combination was tested using a log-rank test with scores of Sun [50] for interval censored data (Z statistic). Four groups differed in seedling age at start of flooding period (age2-age8) and one group was the unflooded control (noFl). EIV m, Ellenberg indicator value for moisture;
~, indicator for alternating moisture conditions (F value, Ellenberg et al. [47]); chisq, chi-square value; df, degrees of freedom; p, error probability; p values < 0.05 are in bold; survival differences, significant differences (p < 0.05) in survival of plants between age groups according to log-rank test; for each species-seedling age combination: n = 20.