Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Current defined limits of maximum tree cover (as defined by Sankaran et al. [30]) (solid black line) across a rainfall gradient. Maximum tree cover in low-rainfall savannahs (MAP < 650 mm) is constrained by water availability. CO2 fertilization is expected to increase the maximum tree cover, for the same amount of rainfall, as well as increase the probability of reaching maximum woody cover.
