scholarly journals Vachellia (Acacia) karroo Communities in South Africa: An Overview

2018 ◽  
Author(s):  
Mamokete Dingaan ◽  
Pieter J. du Preez
Keyword(s):  
South Africa ◽  
Acacia Karroo

scholarly journals The role of flowering plant species in the survival of blackflies (Diptera: Simuliidae) along the lower Orange River, South Africa

Koedoe ◽  
2001 ◽  
Vol 44 (2) ◽  
Author(s):  
E. Myburgh ◽  
H. Bezuidenhout ◽  
E.M. Neville
Keyword(s):  
South Africa ◽  
Plant Species ◽  
Environmental Conditions ◽  
National Park ◽  
Flowering Plant ◽  
Limiting Factor ◽  
Acacia Karroo ◽  
Ziziphus Mucronata ◽  
Flowering Plant Species

This study is an investigation of the role that plants play in the survival of adult blackflies by providing shelter and carbohydrate food. A detailed phenological study of the 29 most abundant plant species in the Augrabies Falls National Park showed that throughout the year the percentage of plant species flowering was remarkably constant. It is therefore unlikely that the availability of carbohydrates would limit adult Simulium survival at any time of the year. Blackflies were recorded feeding on the flowers of Pappea capensis. Acacia karroo, A. mellifera, Tamarix usneoides, Ziziphus mucronata, Scholia afra and Sisyndite spartea. An additional survey showed that another 64 plant species flowered throughout the year, and these can be regarded as potential carbohydrate sources. Blackflies were observed sheltering in dense shrubs and trees that provide protection against predation and harsh environmental conditions. This study suggests that vegetated drainage lines are the means by which adult blackflies survive dispersal away from the river. It is concluded that carbohydrate scarcity cannot be considered a limiting factor to adult blackfly survival along the lower Orange River.

scholarly journals Five New Species of the Botryosphaeriaceae from Acacia Karroo in South Africa

2012 ◽  
Vol 33 (3) ◽  
pp. 245-266 ◽  
Author(s):  
Fahimeh Jami ◽  
Bernard Slippers ◽  
Marieka J. Wingfield ◽  
Mike Gryzenhout
Keyword(s):  
South Africa ◽  
New Species ◽  
Acacia Karroo

scholarly journals Dune vegetation dynamics from 1937 to 1976 in the Mlalazi-Richards Bay area of Natal, South Africa

Bothalia ◽  
1983 ◽  
Vol 14 (3/4) ◽  
pp. 661-667 ◽  
Author(s):  
P. J. Weisser ◽  
R. Müller
Keyword(s):  
South Africa ◽  
Vegetation Cover ◽  
Vegetation Dynamics ◽  
Forest Plantations ◽  
Vegetation Changes ◽  
Dune Vegetation ◽  
Forest Habitat ◽  
Acacia Karroo ◽  
Bay Area ◽  
Richards Bay

Dune vegetation changes were studied qualitatively with the aid of air photos taken in 1937, 1957 and 1976.Results were transferred to 1:10 000 scale maps. In 1937 roughly 80% of the dune forest habitat was occupied by planted fields and post cultivation serai stages such as Secondary Grasslands and Dwarf Shrubland, Secondary Scrub and Acacia karroo Woodland. In three areas, the vegetation cover had been completely destroyed and drift sands had formed. In the 1950’s the trend of vegetation degradation was changed by the implementation of an afforestation programme by the Department of Forestry. The 1976 air photos indicate that the post cultivation serai stages of 1937 had been largely replaced by forest plantations. In secondary, unafforested areas the vegetation is evolving rapidly towards a Secondary Dune Forest.

scholarly journals Temporal and spatial variation of Botryosphaeriaceae associated with Acacia karroo in South Africa

2015 ◽  
Vol 15 ◽  
pp. 51-62 ◽  
Author(s):  
Fahimeh Jami ◽  
Bernard Slippers ◽  
Michael J. Wingfield ◽  
Mattheus T. Loots ◽  
Marieka Gryzenhout
Keyword(s):  
South Africa ◽  
Spatial Variation ◽  
Temporal And Spatial Variation ◽  
Acacia Karroo ◽  
Temporal And Spatial
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