Table 2.

Comparison of nitrogen and phosphorus sources in broadleaved forests across latitude zones

Latitude zone	HiN	HiP	Atmospheric N*	Atmospheric P*	Bedrock weathered P**
Tropical	0.26 ± 0.04	0.022 ± 0.004	0.38 ± 0.08	0.005 ± 0.001	0.054 ± 0.019
Temperate	0.11 ± 0.02	0.009 ± 0.002	1.03 ± 0.14	0.004 ± 0.001	0.045 ± 0.015
Boreal	0.05 ± 0.02	0.003 ± 0.001	0.49 ± 0.12	0.003 ± 0.001	0.069 ± 0.037
Global mean	0.17 ± 0.02	0.014 ± 0.002	0.69 ± 0.08	0.005 ± 0.001	0.056 ± 0.012

^* Estimates derived from model by Brahney et al.⁵⁴.

^** Estimates derived from model by Hartmann et al.⁵⁵.

Net insect-mediated fluxes (H_i, g m⁻² y⁻¹) of nitrogen (N) and phosphorus (P) compared to other major ecosystem inputs of nutrients in 33 tropical, 32 temperate, and 9 boreal forest plots. Values represent means ± standard errors. Source data are provided as a Source Data file.