00924nas a2200133 4500008004100000245009000041210006900131300001000200490000800210520047400218100001800692700002300710856005700733 2012 eng d00aComment on "Global Resilience of Tropical Forest and Savanna to Critical Transitions"0 aComment on Global Resilience of Tropical Forest and Savanna to C a541 -0 v3363 a
Hirota et al. (Reports, 14 October 2011, p. 232) used spatial data to show that grasslands, savannas, and forests represent opposing stable states. Reanalyzing their data and drawing from temporal studies, we argue that spatial analyses underestimate the bistability of grasslands and savannas due to limitations of substituting space for time. We propose that temporal and spatial data are needed to predict critical transitions between grasslands and savannas.
1 aRatajczak, Z.1 aNippert, Jesse, B. uhttp://science.sciencemag.org/content/336/6081/541.3