Before revision:  The model also reveals that the emerging power-law exponents  depend on the overall vegetation-cover density, in agreement with empirical observations , suggesting that environmental variability plays a key role in the formation of scale-free vegetation patterns.
After revision:  The model also reveals that the emerging power-law exponents fitting the tails of the probability distributions depend on the overall vegetation-cover density, in agreement with empirical observations , suggesting that environmental variability plays a key role in the formation of scale-free vegetation patterns.