The use of nutrients by plants is linked to a variety of processes that scale from individual leaves to ecosystems. Theory and observations support a scaling in plants between nutrient use and growth rate (Reich et al., 2006; Enquist et al., 2007), and nutrient turnover rates have measurable downstream effects on litter decomposition rates (Kobe et al., 2005; Kazakou et al., 2006; Parton et al., 2007) and ecosystem productivity (Garnier et al., 2004). These are in turn linked to population dynamics (Shipley et al., 2006) and regional biogeochemical cycling...

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