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Forest Ecosystems
Fig. 2 | Forest Ecosystems

Fig. 2

From: Topography modulates effects of nitrogen deposition on microbial resource limitation in a nitrogen-saturated subtropical forest

Fig. 2

Changes of enzymatic stoichiometry indexes after two years of N addition. (a) Vector length and (b) BG/AP are two indicators of microbial C limitation. High vector length or BG/AP means greater C limitation. (c) BG/(LAP + NAG) and (d) RC:N – TERC:N are two indicators of microbial N limiation. High BG/(LAP + NAG) means lower N limitation, while higher RC:N – TERC:N means higher N limitation. (e) Vactor angle and (f) RC:P – TERC:P are two indictors of microbial P limitation. Greater vector angle indicates greater P limitation when vector angles > 45°; higher RC:P – TERC:P means higher P limitation. CT: control; LN: low-N addition; HN: high-N addition. Error bars denote the standard error (n = 3). Different letters indicate significant difference (P < 0.05) between treatments. The asterisks indicate significant different between RC:N – TERC:N (or RC:P – TERC:P) and zero

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