Thus, an increasing trend in these statistical indicators works as an early warning signal (EWS) of an impending critical transition (Brock and Carpenter 2010 ; Dakos et al. 2012 ).
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Thus, an increasing trend in these statistical indicators works as an early warning signal (EWS) of an impending critical transition (Brock and Carpenter 2010 ; Dakos et al. 2012 ).