To investigate the continental-scale relationships between the diversity of microbial and invertebrate-based soil food webs, fertility and above-ground plant productivity at 289 sites and two soil depths, that is 0–10 and 20–30 cm, across Australia.
Type of Study:
Soil biodiversity, fertility and plant productivity are strongly positively related in surface soils. Conversely, in the deeper soil layer, the relationships between soil biodiversity, fertility and plant productivity weaken considerably, probably as a result of a reduction in biodiversity and fertility with depth.
One-way ANOVA, linear regression, structural equation modeling (SEM)
Response variable :
Soil fertility and diversity indices, normalized difference vegetation index (NDVI) as proxy of plant productivity. Mean annual temperature (MAT) and aridity index (AI).
Delgado‐Baquerizo, M., Powell, J. R., Hamonts, K., Reith, F., Mele, P., Brown, M. V., ... & Singh, B. K. (2017). Circular linkages between soil biodiversity, fertility and plant productivity are limited to topsoil at the continental scale. New Phyt, 215, 1186-1196.