Table 1.
Scaling of leaf biomass and carbohydrate TNC pools
| Groups | Lathyrus niger | Trifolium montanum | Filipendula vulgaris | Geranium sanguineum | Potentilla erecta | Angelica sylvestris | Clematis recta | Salvia pratensis | Selinum carvifolia | |
|---|---|---|---|---|---|---|---|---|---|---|
| Correlation (β) | JM | 1.40* | 1.05* | 1.45* | 1.09** | 1.02* | 0.64** | 0.84 | 0.94 | 0.62** |
| JU | 2.69† | 1.76* | 1.02† | 1.38 | -1.82 | 1.14** | 0.93** | 1.53 | 0.68 | |
| OM | 1.19 | 1.14† | -1.59 | 1.87* | 1.44** | 0.86* | 1.82 | 1.92† | 1.26* | |
| OU | 1.84* | 0.93** | 1.09 | 0.67 | 0.88† | 0.67** | 0.46 | –1.20 | 0.93* | |
| CS ≠ 1 (LRS) | 17.34** | 5.47 | 4.25 | 8.14† | 5.18 | 6.70 | 5.98 | 7.15 | 5.93 | |
| Difference of individual slopes from 1 (r) | JM | 0.39 | 0.06 | 0.44 | 0.14 | 0.03 | –0.57† | –0.17 | –0.06 | –0.57† |
| JU | 0.81** | 0.64* | 0.03 | 0.32 | 0.53 | 0.25 | –0.12 | 0.43 | –0.39 | |
| OM | 0.19 | 0.15 | 0.45 | 0.66* | 0.53 | -0.21 | 0.59† | 0.63* | 0.28 | |
| OU | 0.65* | –0.12 | 0.10 | –0.38 | –0.16 | –0.56† | –0.73 | 0.18 | –0.09 | |
| Common slope (β) | 1.70 | 1.14 | 1.26 | 1.21† | 1.21 | 0.83 | 0.98 | 1.39 | 0.82 | |
| JM | – | – | – | AB | – | – | – | – | – | |
| JU | – | – | – | AB | – | – | – | – | – | |
| OM | – | – | – | A | – | – | – | – | – | |
| OU | – | – | – | B | – | – | – | – | – | |
| Shifts in elevation (Wald statistic) | 43.57** | 31.05** | 21.40** | 68.36 | 36.99** | 6.84† | 18.09** | 14.53** | 33.81** | |
| JM | A | A | A | A | A | AB | A | AB | A | |
| JU | A | A | A | A | A | A | A | A | A | |
| OM | B | B | B | B | B | B | B | BD | B | |
| OU | B | B | B | B | C | AB | A | CD | B | |
| Test for shift along the common slope (Wald statistic) | 28.3** | 12.86** | 19.53** | 0.58 | 0.40 | 9.90* | 25.54** | 2.64 | 4.55 | |
| JM | A | A | A | – | – | A | A | – | – | |
| JU | A | A | AB | – | – | A | A | – | – | |
| OM | B | B | C | – | – | AB | B | – | – | |
| OU | A | AB | CB | – | – | B | C | – | – |
Correlation: slopes of individual lines fitted using the standardized major axis approach. Difference of slope from one: statistical tests determining whether the slopes of individual lines differ from β = 1; note that only correlations with P < 0.1 were tested. Common slope: statistical tests determining whether the slopes for individual groups differ from the common slope followed by a post-hoc test in case they differ. Shifts in elevation: tests for plants with a common slope testing whether the groups shift in elevation (i.e. shift along the y-axis) followed by a post-hoc test in case they differ. Test for shifts along the common slope: tests for plants with a common slope testing whether the groups shift along the common slope. Groups: JM, June mown; JU, June unmown; OM, October mown; OU. October unmown.
Groups with the same letters in post-hoc tests do not significantly differ.
CS, common slope; LRS, likelihood ratio statistic; r, sample correlation between residuals and fitted values.
† P < 0.1; *0.05> P >0.01; **P < 0.01.