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. 2013 Nov 27;113(3):501–511. doi: 10.1093/aob/mct275

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