Table 4.
Summary statistics of ordinary least squares (OLS) and reduced major axis (RMA) regression analysis of the relationship between log10-transformed data of final shoot (Y) and root biomass (X) for six species
| OLS analyses |
RMA analyses |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| αOLS | r2 | OLS model error | Mean log Y | s.d. log Y | Mean log X | s.d. log X | n | α s.e. | β s.e. | αRMA | 95 % CI | log10 βRMA | 95 % CI | |||
| E. oxyrrhynchum | 1·056 | 0·801 | 0·715 | –0·552 | 0·247 | –1·576 | 0·209 | 60 | 0·472 | 0·836 | 1·179 | 0·708 | 1·651 | 1·307 | –0·332 | 2·945 |
| H. pulchella | 1·102 | 0·966 | 0·121 | 0·644 | 0·244 | –0·607 | 0·217 | 60 | 0·190 | 0·134 | 1·121 | 0·931 | 1·311 | 1·324 | 1·062 | 1·587 |
| A. linifolium | 1·153 | 0·867 | 0·213 | –1·441 | 0·181 | –2·222 | 0·146 | 50 | 0·338 | 1·005 | 1·238 | 0·900 | 1·577 | 1·310 | –0·660 | 3·280 |
| C. arenarius | 1·047 | 0·791 | 1·011 | 0·132 | 0·287 | –1·152 | 0·243 | 60 | 0·520 | 0·634 | 1·177 | 0·657 | 1·697 | 1·488 | 0·246 | 2·730 |
| S. ruthenica | 0·990 | 0·858 | 0·213 | 0·970 | 0·323 | –0·421 | 0·303 | 60 | 0·214 | 0·103 | 1·068 | 0·854 | 1·282 | 1·419 | 1·218 | 1·620 |
| H. ulicinia | 0·836 | 0·728 | 0·789 | 0·879 | 0·243 | –0·610 | 0·248 | 50 | 0·499 | 0·336 | 0·980 | 0·481 | 1·480 | 1·476 | 0·818 | 2·135 |
| All ephemerals | 1·270 | 0·993 | 0·924 | –0·391 | 0·876 | –1·427 | 0·687 | 170 | 0·175 | 0·170 | 1·275 | 1·100 | 1·449 | 1·428 | 1·094 | 1·762 |
| All annuals | 1·099 | 0·907 | 3·620 | 0·647 | 0·479 | –0·734 | 0·415 | 170 | 0·445 | 0·297 | 1·154 | 0·709 | 1·600 | 1·495 | 0·912 | 2·077 |
| All species | 1·300 | 0·971 | 7·420 | 0·128 | 0·876 | –1·081 | 0·664 | 340 | 0·356 | 0·282 | 1·319 | 0·963 | 1·675 | 1·553 | 1·000 | 2·107 |