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Browsing by Author "Dean, W R J"

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Did the flora match the fauna? Acocks and historical changes in Karoo biota

Author: Dean, W R J ; Milton, S J Date: 2003 Years of observation in Karoo veld convinced JP Acocks that the perennial grasses that he occasionally encountered in barren Karoo landscapes were remnants of pre-colonial vegetation. He maintained that desertification, caused by overgrazing ... Read more
Evidence for induced pseudo-vivipary in Pennisetum setaceum (Fountain grass) invading a dry river, arid Karoo, South Africa

Author: Milton, S J ; Dean, W R J ; Rahlao, S J Date: 2008 We report the development of rootless plantlets in inflorescences of Pennisetum setaceum (Fountain grass) invasive in the Gamka River in the Karoo National Park, South Africa. The pseudo-vivipary appeared to have been induced by inundation ... Read more
Human response and adaptation to drought in the arid zone: lessons from southern Africa

Author: O'farrell, P J ; Anderson, P M L ; Milton, S J ; Dean, W R J Date: 2009 Human adaptation and response to drought is primarily through evasion or endurance. A review of historical agricultural practices in southern Africa demonstrates evidence of drought evasion response strategies in well-established transhumance ... Read more
Scaling up from site-based research to a national research and monitoring network: lessons from Tierberg Karoo Research Centre and other design considerations

Author: Dean, W R J ; Milton, S J ; O'Connor, T G ; Mills, A J Date: 2007 South Africa is in the process of setting up a national environmental observatory system (SAEON) to monitor and gain a predictive understanding of the effects of climate change and land use on biodiversity, carbon and nutrient fluxes, soils ... Read more c b
When to stay, when to go: trade-offs for southern African arid-zone birds in times of drought

Author: Dean, W R J ; Barnard, P ; Anderson, M D Date: 2009 Arid environments remind one of the punctuated equilibrium theory of evolution : they experience long periods of stasis and low productivity, interrupted with episodic rainfall which spurs reproduction and movement. Birds, as highly dispersive ... Read more

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Browsing by Author "Dean, W R J"

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