Table 1.
Summary statistics of reduced major axis regression analyses of log10-transformed data for above- and below-ground standing biomass (MA and MB; original units = kg d. wt plant−1) and annual growth rate relationships (GA and GB; original units = kg d. wt plant−1 year−1)
| αPred. |
αRMA ± s.e |
95 % CI |
Log βRMA ± s.e |
95 % CI |
n |
r2 |
F |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Across entire database (0·0000003 ≤ MA ≤ 2723 kg d. wt; 0·0000003 kg d. wt ≤ MR ≤ 462·5 kg d. wt) | ||||||||||||||||
| MB vs. MA | 3/4–1 | 0·941 ± 0·01 | 0·930–0·946 | −0·517 ± 0·01 | −0·548 to −0·499 | 1406 | 0·974 | 53071 | ||||||||
| MB vs. MS | 1·0 | 0·924 ± 0·01 | 0·900–0·921 | −0·386 ± 0·01 | −0·391 to −0·361 | 878 | 0·975 | 34784 | ||||||||
| MB vs. ML | 4/3 | 1·172 ± 0·01 | 1·154–1·184 | 0·438 ± 0·02 | 0·410 to 0·484 | 847 | 0·963 | 21796 | ||||||||
| GB vs. GA | 1·0 | 0·946 ± 0·01 | 0·930–0·962 | −0·678 ± 0·02 | −0·709 to −0·647 | 406 | 0·970 | 12927 | ||||||||
| GB vs. GS | 1·0 | 0·853 ± 0·01 | 0·835–0·869 | −0·464 ± 0·02 | −0·501 to −0·427 | 406 | 0·961 | 10012 | ||||||||
| GB vs. GL | 1·0 | 0·956 ± 0·01 | 0·937–0·974 | −0·303 ± 0·02 | −0·341 to −0·264 | 426 | 0·960 | 10210 | ||||||||
| Across new data set (0·0000003 ≤ MA ≤ 6·70 kg d. wt; 0·0000003 kg d. wt ≤ MR ≤ 27·3 kg d. wt) | ||||||||||||||||
| MB vs. MA | 1·0 | 0·955 ± 0·01 | 0·934–0·974 | −0·614 ± 0·03 | −0·675 to −0·355 | 1061 | 0·883 | 8025 | ||||||||
| MB vs. MS | 1·0 | 1·016 ± 0·02 | 0·976–1·056 | −0·332 ± 0·06 | −0·447 to −0·216 | 532 | 0·839 | 2765 | ||||||||
| MB vs. ML | 1·0 | 1·058 ± 0·01 | 1·027–1·090 | −0·054 ± 0·05 | −0·144 to 0·037 | 504 | 0·891 | 4083 | ||||||||
| GB vs. GA | 1·0 | 0·965 ± 0·02 | 0·920–1·010 | −0·569 ± 0·06 | −0·684 to −0·454 | 201 | 0·901 | 1812 | ||||||||
| GB vs. GS | 1·0 | 0·906 ± 0·03 | 0·848–0·954 | −0·398 ± 0·08 | −0·558 to −0·238 | 201 | 0·841 | 1052 | ||||||||
| GB vs. GL | 1·0 | 0·982 ± 0·02 | 0·935–1·022 | −0·326 ± 0·06 | −0·443 to −0·209 | 201 | 0·901 | 1999 | ||||||||
| Across Cannell (1982) data set (0·00126 ≤ MA ≤ 2723 kg d. wt; 0·00043 kg d. wt ≤ MR ≤ 462·5 kg d. wt) | ||||||||||||||||
| MB vs. MA | 3/4–1 | 0·924 ± 0·01 | 0·900–0·947 | −0·429 ± 0·02 | −0·475 to −0·383 | 345 | 0·944 | 5786 | ||||||||
| MB vs. MS | 1·0 | 0·893 ± 0·01 | 0·871–0·917 | −0·338 ± 0·02 | −0·381 to −0·294 | 346 | 0·944 | 5806 | ||||||||
| MB vs. ML | 4/3 | 1·195 ± 0·02 | 1·116–1·274 | 0·598 ± 0·03 | 0·539 to 0·657 | 343 | 0·724 | 876 | ||||||||
| GB vs. GA | 1·0 | 1·019 ± 0·02 | 0·965–1·066 | −0·747 ± 0·02 | −0·794 to −0·700 | 205 | 0·884 | 1549 | ||||||||
| GB vs. GS | 1·0 | 0·972 ± 0·02 | 0·936–1·009 | −0·535 ± 0·02 | −0·564 to −0·505 | 205 | 0·932 | 2771 | ||||||||
| GB vs. GL | 1·0 | 0·926 ± 0·03 | 0·926–1·078 | −0·278 ± 0·02 | −0·325 to −0·230 | 205 | 0·768 | 671 | ||||||||
In each case, P < 0·0001.
αPred. = predicted scaling exponent.