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Global patterns of root turnover for terrestrial ecosystems

Gill R, RB Jackson
New Phytologist
Journal Volume/Pages: 

Root turnover is a critical component of ecosystem nutrient dynamics and carbon sequestration and is also an important sink for plant primary productivity. We tested global controls on root turnover across climatic gradients and for plant functional groups using a database of 190 published studies. Root turnover rates increased exponentially with mean annual temperature for fine roots of grasslands (r2=0.48) and forests (r2=0.17) and for total root biomass in shrublands (r2=0.55). Based on the best-fit exponential model, the Q10 for root turnover was 1.4 for forest small diameter roots (

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