부산대학교 도서관

Aeolian sediment transport processes are sensitive to dryland ecosystem change and can contribute to the transition of savannah grasslands to shrub-invaded and shrub-dominated states (Okin, Gillette, & Herrick, [21]; Ravi, Breshears, Huxman, & D'Odorico, [26]). Increasing shrub density within savannah grassland sites appeared to increase I z i SB 0 sb from phase A1 (0.06 ± 0.27 m) to A2 (0.12 ± 0.24 m), while reducing grass cover within bush-invaded savannah sites appeared to reduce I z i SB 0 sb from phase B1 (0.14 ± 0.15 m) to B2 (0.08 ± 0.14 m). DISCUSSION Dryland ecosystem change, including shrub invasion of savannah grasslands, can alter landscape aerodynamics and accelerate aeolian sediment transport (Ravi et al., [26]). Elucidating whether aeolian processes are a driver of ecosystem change is necessary for understanding the dynamics and feedbacks of bush encroachment and herbaceous species losses in the Kalahari, as well as other drylands, at the systems level (e.g., Stringer et al., [29]). [Extracted from the article]