In Irisarri et al. (2012), The inter-annual CV of figure 7 was wrongly estimated for both Knapp and Smith (2001) and Bai et al. (2008). This mistake changed the interpretation of it in the Discussion section. The corrected figure and associated paragraph are given here. We would like to thank Dr. Alan Knapp for calling our attention to this error.
Fig 7. Relationship between ANPP inter-annual relative variation and mean ANPP for steppes and meadows of Patagonia and data for different biomes from the literature. Different biomes (Knapp & Smith 2001) ANPP CV = 0.46 × e(−0.003 × ANPP) R2: 0.68 (P < 0.05). Grassland and steppes (Bai et al. 2008) ANPP CV = 0.42 × e(−0.003 × ANPP) R2: 0.55 (P < 0.05). Patagonia (Jobbágy & Sala 2000; Buono et al. 2010 and our data): ANPP CV = 0.40 × e(−0.001 × ANPP) R2: 0.44 (P < 0.05).
The relationship between the interannual variation of ANPP and either the mean annual ANPP or the interannual variability of rainfall across sites is a key issue (Knapp & Smith 2001). The interannual relative variation of ANPP decreases exponentially with mean ANPP across different biomes (Knapp & Smith 2001), and grasslands and steppes of Mongolia (Bai et al. 2008). Meadows of Patagonia showed a similar pattern of variation, but with a slightly higher relative interannual variation than systems of the northern hemisphere (Knapp & Smith 2001 and our data, Fig. 7)
Irisarri, J.G.N., Oesterheld, M., Paruelo, J.M. & Texeira, M.A. 2012. Patterns and controls of above-ground net primary production in meadows of Patagonia. A remote sensing approach. Journal of Vegetation Science 23: 114–126.