Comment on "Global resilience of tropical forest and savanna to critical transitions".
نویسندگان
چکیده
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.
منابع مشابه
Global resilience of tropical forest and savanna to critical transitions.
It has been suggested that tropical forest and savanna could represent alternative stable states, implying critical transitions at tipping points in response to altered climate or other drivers. So far, evidence for this idea has remained elusive, and integrated climate models assume smooth vegetation responses. We analyzed data on the distribution of tree cover in Africa, Australia, and South ...
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ورودعنوان ژورنال:
- Science
دوره 336 6081 شماره
صفحات -
تاریخ انتشار 2012