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- van der Merwe, Helga; Milton, Suzanne J
- African journal of range & forage science 2019 v.36 no.1 pp. 61-66
- Osteospermum; canopy; climate change; deserts; grazing; herbivores; livestock; plant growth; ranching; rangelands; shrubs; ungulates; wildlife
- ... Growth studies of long-lived shrubs are uncommon. In semi-arid rangelands, livestock and wildlife grazing influence growth processes and may interact with changing climate. Tierberg-LTER, excluded from livestock since 1987, and two adjacent ranches allowed for a comparative growth study of three shrub species (Osteospermum sinuatum – palatable, Pteronia empetrifolia – moderately palatable, and P. ...
- Nghalipo, Elise; Joubert, Dave; Throop, Heather; Groengroeft, Alexander
- African journal of range & forage science 2019 v.36 no.1 pp. 9-16
- Miocene epoch; calcium; canopy; ecosystems; fire history; magnesium; mineralization; phosphorus; potassium; savanna woodlands; savannas; sodium; soil nutrients; soil organic carbon; soil sampling; statistical analysis; total nitrogen; trees; uncertainty; volatilization; Namibia
- ... Fire is an integral part of savanna ecosystems that has shaped these systems since the Miocene. Substantial uncertainty about fire effects in semi-arid ecosystems exists. Fire may affect ecosystem productivity directly through nutrient volatilisation, increased mineralisation and altering organic matter quantity, and indirectly through altering vegetation structure. We explored the effects of fire ...