| Abstract |
Bush encroachment has been reported to be a problem in the extensive grazing systems in the savannas of Namibia since the 1970's . However, little data is available in the Namibian context on the degree and spread of bush encroachment other than anecdotal evidence. The find of old photographs from 1956 by Prof Vo lk, associated with some relevé data from that time, triggered this research into the long term dynamics of the Thornbush Savanna of Central Namibia. A long term biodiversity observ atory was established in 2001, and this is resurveyed annually. This ground based survey of floristic biodiversity is since 2016 supplemented by high resolution aerial surveys of the observatory using drones. |
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