Extended Data Fig. 4: Effect of fine root traits on tree growth in the European Atlantic Network. | Nature

Extended Data Fig. 4: Effect of fine root traits on tree growth in the European Atlantic Network.

From: Widespread slow growth of acquisitive tree species

Extended Data Fig. 4

Fine roots are roots with a diameter ≤ 2 mm. Data are standardized to enable comparisons among sites (see Methods). For panels from a to h, the statistics of the regressions (level of confidence of the error band = 0.95) were: t = −1.3, +3.6, +9.6, −2.6, +0.7, −1.3, −5.2 and −3.6; df = 617 and n = 619 in all cases. Specific root length (SRL) results are presented in Extended Data Fig. 3. Original units: fine root content in carbon and nutrients (mg g−1), fine root dry matter content (g g−1), and fine root length density (cm−root cm−3−soil).

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