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Ecological Processes
Fig. 4 | Ecological Processes

Fig. 4

From: Symbiotic mycorrhizal types affect patterns of tree aboveground and belowground C allocation in Northeast China

Fig. 4

Structure equation models (SEM) showing the effects of MAP, MAT, species richness (including AM-associated tree species richness, EM-associated tree species richness, and total species richness), and nitrogen deposition on the ratio of aboveground C storage to belowground C storage. A AM-RAB, the ratio of AM-associated tree aboveground C storage to belowground C storage; B EM-RAB, the ratio of EM-associated tree aboveground C storage to belowground C storage. The yellow line indicates a significant positive correlation, the blue line indicates a significant negative correlation, and the dotted line indicates a non-significant correlation. Arrow width is proportional to the strength of the relationship. Numbers adjacent to arrows denote standardized path coefficients. Significant levels are: *, p < 0.05; **, p < 0.01; ***, p < 0.001

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