Author Correction: Plant spatial patterns identify alternative ecosystem multifunctionality states in global drylands

Berdugo, Miguel; Kéfi, Sonia; Soliveres, Santiago; Maestre, Fernando T. (2018). Author Correction: Plant spatial patterns identify alternative ecosystem multifunctionality states in global drylands. Nature ecology & evolution, 2(3), pp. 574-576. Nature Publishing Group 10.1038/s41559-017-0382-5

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Correction to: Nature Ecology & Evolutionhttps://doi.org/10.1038/s41559-016-0003, published online 9 January 2017.

In the version of this Article originally published, the values of two of the functions used to calculate the multifunctionality index were incorrect. In particular, the values of phosphatase activity and inorganic phosphorus were a copy of total phosphorus and beta glucosidade activity, respectively, in the database due to translocation of columns in an intermediate step for the calculation of multifunctionality. This mistake results in the overall values of the multifunctionality index (which is calculated as the average of Z-score values of all functions) to be slightly different from those reported in the paper. The main changes resulting from using the correct dataset are: (i) there is less evidence for two multifunctionality states than previously shown, although this variable is still clearly bimodal, (ii) the two multifunctionality states co-occur over a shorter gradient of aridity values (0.75–0.80) than the ones shown in the original manuscript (0.60–0.80) and (iii) some of the relationships between functions shown in Fig. 3 have changed and now in the low-multifunctionality states there are more connections between functions. Despite these changes, the main results and conclusions from the original paper remained consistent after correcting our mistake. As stated and discussed in the original manuscript, there are two multifunctionality states in global drylands, the co-occurrence of which is preceded by an abrupt decrease of the power law range (PLR). Plant cover is the best predictor for linear changes in multifunctionality but only spatial patterns can detect shifts between these two multifunctionality states, which highlights the potential use of spatial patterns as early warning signals. Despite the changes observed in the relationships between some of the functions studied, the functions related to the C and N cycles exhibited fewer connections in high- than in low-multifunctionality states (as was originally discussed in the paper).

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