Growth responses of African savanna trees implicate atmospheric [CO2] as a driver of past and current changes in savanna tree cover.

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Exploring consensus in 21st century projections of climatically suitable areas for African vertebrates (2011, background): “In the case of grass-dominated savan-nas, the low levels of CO 2 that triggered their development during the last glacial are clearly being surpassed, with expected changes in tree cover (Bond et al. , 2003; Kgope et al. , 2010) and associated fauna (Sirami et al. , 2009).”
Savanna woody encroachment is widespread across three continents (2017, unknown): “functional types within them (but see (Hoffmann et al., 2000; Stokes et al., 2005; Kgope et al., 2010).”