A synecological account of the Suikerbosrand Nature Reserve. I. The phytosociology of the Witwatersrand geological system

Bothalia ◽  
1978 ◽  
Vol 12 (3) ◽  
pp. 513-529 ◽  
Author(s):  
G. J. Bredenkamp
Keyword(s):  
Plant Communities ◽  
Soil Texture ◽  
Nature Reserve ◽  
Soil Depth ◽  
Soil Surface ◽  
Considerable Importance ◽  
Habitat Features ◽  
Habitat Factors ◽  
Species Groups ◽  
Natural Communities

The vegetation of the Witwatersrand System of the Suikerbosrand Nature Reserve is analysed and classified according to the Braun-Blanquet table method. Descriptions of the plant communities include habitat features, differentiating species groups, as well as prominent and less conspicuous species for the tree, shrub and herbaceous layers. The habitat factors that are associated with differences in vegetation are mainly altitude, aspect and rockiness of the soil surface, but soil depth, soil texture and slope are also factors of considerable importance. The classification results in very natural communities which represent different ecosystems.

A synecological account of the Suikerbosrand Nature Reserve. II. The phytosociology of the Ventersdorp Geological System

Bothalia ◽  
1980 ◽  
Vol 13 (1/2) ◽  
pp. 199-216 ◽  
Author(s):  
G. J. Bredenkamp ◽  
G. K. Theron
Keyword(s):  
Plant Communities ◽  
Soil Texture ◽  
Nature Reserve ◽  
Surface Soil ◽  
Soil Depth ◽  
Soil Surface ◽  
Habitat Features ◽  
Species Groups

The vegetation of the Ventersdorp Geological System of the Suikerbosrand Nature Reserve is analysed and classified according to the Braun-Blanquet method. Descriptions of the plant communities include description of habitat features, the identification of differentiating species groups as well as the listing of prominent and less conspicuous species for the tree, shrub and herbaceous layers. The habitat features that are associated with differences in vegetation include altitude, aspect, slope, rockiness of soil surface, soil depth and soil texture.

scholarly journals Vegetation of the Witbank Nature Reserve and its importance for conservation of threatened Rocky Highveld Grassland

Koedoe ◽  
1997 ◽  
Vol 40 (2) ◽  
Author(s):  
C.M. Smit ◽  
G.J. Bredenkamp ◽  
N. Van Rooyen ◽  
A.E. Van Wyk ◽  
J.M. Combrinck
Keyword(s):  
Soil Moisture ◽  
Plant Communities ◽  
Nature Reserve ◽  
Soil Depth ◽  
Floristic Composition ◽  
Diversity Indices ◽  
Moisture Gradient ◽  
Negative Effects ◽  
Soil Moisture Gradient ◽  
Great Escarpment

A vegetation survey of the Witbank Nature Reserve, comprising 847 hectares, was conducted. Phytosociological data were used to identify plant communities, as well as to determine alpha and beta diversities. Eleven plant communities were recognised, two of these are subdivided into sub- communities, resulting in 14 vegetation units. These communities represent four main vegetation types, namely grassland, woodland, wetland and disturbed vegetation. Grassland communities have the highest plant diversity and wetland vegetation the lowest. Floristic composition indicates that the vegetation of the Rocky Highveld Grassland has affinities to the grassland and savanna biomes and also to the Afromontane vegetation of the Great Escarpment. An ordination scatter diagram shows the distribution of the 14 plant communities or sub-communities along a soil moisture gradient, as well as along a soil depth/surface rock gradient. The sequence of communities along the soil moisture gradient is used for calculating beta-diversity indices. It is concluded that the relatively small size of the Witbank Nature Reserve is unlikely to have significant negative effects on the phytodiversity of the various plant communities. This nature reserve is therefore of considerable importance in conserving a representative sample of the Rocky Highveld Grassland.

A phyt osociological classification of the vegetation of the Jack Scott Nature Reserve*

Bothalia ◽  
1974 ◽  
Vol 11 (3) ◽  
pp. 329-347 ◽  
Author(s):  
B. J. Coetzee
Keyword(s):  
Soil Texture ◽  
Woody Plants ◽  
Nature Reserve ◽  
Floristic Composition ◽  
Climatic Variation ◽  
Slope Aspect ◽  
Management Units ◽  
Habitat Features ◽  
Table Method

The vegetation of the Jack Scott Nature Reserve in the Central Bankenveld Veld Type is classified chiefly by the Braun-Blanquet Table Method. Habitat features, physiognomy, total floristic composition, differentiating species, woody plants and prominent grasses and forbs are presented for each community. Characterizing habitat features, in order of importance for the communities, are: exposure, soil texture, geology, slope, aspect, degree of rockiness and previous ploughing. The classification correlates well with the major physiographic and climatic variation in the Reserve and generally does not cut across main physiognomic types. The communities are potentially homogeneous management units.

Cape Hangklip area. II. The vegetation*

Bothalia ◽  
1978 ◽  
Vol 12 (3) ◽  
pp. 441 ◽  
Author(s):  
C. Boucher
Keyword(s):  
Introduced Species ◽  
Plant Communities ◽  
Coastal Plain ◽  
Riparian Vegetation ◽  
Habitat Features ◽  
Table Method ◽  
Factors Influencing ◽  
Habitat Factors ◽  
Mountain Vegetation

Various habitat factors influencing the fynbos vegetation of the Cape Hangklip area, such as topography, geology, soil and climate and historical features, are outlined. Data collected at 250 sampling sites are ordered using the Braun-Blanquet table method. The vegetation is subdivided into three main categories, namely coastal plain vegetation, mountain vegetation and riparian vegetation. A total of 29 communities is distinguished and related to habitat features. Aggressive introduced species which have become naturalized in the area, are also listed. A map showing the distribution of the plant communities is included.

scholarly journals The phytosociology of the southern section of Borakalalo Nature Reserve, South Africa

Koedoe ◽  
1994 ◽  
Vol 37 (2) ◽  
Author(s):  
L.R. Brown ◽  
G.J. Bredenkamp
Keyword(s):  
South Africa ◽  
Plant Communities ◽  
Nature Reserve ◽  
Grazing Pressure ◽  
Conservation Areas ◽  
Factors Associated ◽  
Habitat Factors ◽  
Twinspan Classification ◽  
Southern Section ◽  
Phytosociological Study

As part of a vegetation survey programme for conservation areas in South Africa, the plant communities of the Borakalalo Nature Reserve were investigated. A TWINSPAN classification, refined by Braun-Blanquet procedures was used for a phytosociological study. The analysis resulted in five major plant communities, one with two subcommunities and one with four subcommunities and two variants. Habitat factors associated with differences in vegetation include topography, soil form and grazing pressure. Descriptions of the plant communities include diagnostic species as well as prominent and less conspicuous species of the tree, shrub, forb and grass strata. The classification provides the necessary delimitation of homogeneous areas which are considered necessary for veld management.

scholarly journals Urban nature conservation: vegetation of natural areas in the Potchefstroom municipal area, North West Province, South Africa

Koedoe ◽  
1999 ◽  
Vol 42 (1) ◽  
Author(s):  
S.S. Cilliers ◽  
E. Van Wyk ◽  
G.J. Bredenkamp
Keyword(s):  
South Africa ◽  
Plant Communities ◽  
Soil Depth ◽  
Research Programme ◽  
Soil Surface ◽  
Management Plan ◽  
Natural Areas ◽  
North West ◽  
The North ◽  
North West Province

This study on the natural and degraded natural vegetation of natural areas in the Potchefstroom Municipal Area, forms part of a research programme on spontaneous vegetation in urban open spaces in the North West Province, South Africa. Using a numerical classification technique (TWINSPAN) as a first approximation, the classification was refined by applying Braun-Blanquet procedures. The result is a phytosociological table from which 6 plant communities were recognised, which are subdivided in sub-communities and variants, resulting in 18 vegetation units. Some of these vegetation units are similar to communities described previously in natural areas. The presence of degraded natural communities suggests huge anthropogenic influences in certain areas. An ordination (DECORANA) scatter diagram shows the distribution of the plant communities along gradients which could be related to vegetation structure, altitude, soil depth, rockiness of soil surface, wetness or dryness of the habitat and number of introduced species. This study contributes to the compilation of a guideline for a conservation orientated management plan for the area, but also created a wealth of new knowledge of the reaction of indigenous plant species under disturbed conditions.

scholarly journals Dune vegetation and coastal thicket plant communities in threatened limestone fynbos of Andrew’s Field and Tsaba-Tsaba Nature Reserve, Struisbaai, Western Cape

Koedoe ◽  
2006 ◽  
Vol 49 (1) ◽  
Author(s):  
M.M. Zietsman ◽  
G.J. Bredenkamp
Keyword(s):  
Plant Communities ◽  
Nature Reserve ◽  
Floristic Composition ◽  
Soil Surface ◽  
Western Cape ◽  
Ammophila Arenaria ◽  
Dune Vegetation ◽  
Grassland Community ◽  
Shrub Community ◽  
Dune Grassland

The coastal thicket and dune vegetation of Andrew’s Field and Tsaba-Tsaba Nature Reserve was classified using Braun-Blanquet procedures and TWINSPAN. The vegetation was sampled using 74 randomly stratified sample plots. The floristic composition, cover- abundance of each species, and several environmental variables were recorded in each sample plot. Six plant communities were identified, namely, Rhus glauca - Euclea racemosa low to tall closed thicket community; Chrysanthemoides monilifera - Solanum africanum low closed dune shrub community; Chrysanthemoides monilifera - Ehrharta villosa var. maxima low to high closed dune shrub community; Ehrharta villosa var. maxima low to short closed dune grassland community; Ammophila arenaria low to short closed dune grassland community; and Arcthotheca populifolia - Thinopyrum distichum low to short open beach community. These were subdivided into eight subcommunities and four variants. All communities, sub-communities and variants were described and ecologically interpreted. The distribution of the communities, sub-communities and variants can mainly be ascribed to differences in landform, rockiness of the soil surface the degree of protection / exposure of the vegetation to the dominating winds of the area.

Classification of woody-shrub vegetation of the forest-steppe complex of Privolzhskaya Upland

2009 ◽  
pp. 27-53
Author(s):  
A. Yu. Kudryavtsev
Keyword(s):  
Plant Community ◽  
Plant Communities ◽  
Dominant Species ◽  
Large Scale ◽  
Nature Reserve ◽  
Vegetation Mapping ◽  
Vegetation Classification ◽  
Forest Steppe ◽  
Mapping Data

Diversity of plant communities in the nature reserve “Privolzhskaya Forest-Steppe”, Ostrovtsovsky area, is analyzed on the basis of the large-scale vegetation mapping data from 2000. The plant community classi­fication based on the Russian ecologic-phytocoenotic approach is carried out. 12 plant formations and 21 associations are distinguished according to dominant species and a combination of ecologic-phytocoenotic groups of species. A list of vegetation classification units as well as the characteristics of theshrub and woody communities are given in this paper.

LYSIMETERS WITH RAINFALL AND SOIL WATER CONTROL

1971 ◽  
Vol 2 (2) ◽  
pp. 79-92 ◽  
Author(s):  
K. J. KRISTENSEN ◽  
H. C. ASLYNG
Keyword(s):  
Soil Moisture Content ◽  
Soil Depth ◽  
Irrigation System ◽  
Drainage System ◽  
Soil Surface ◽  
Trickle Irrigation ◽  
Water Control ◽  
Radiation Equipment ◽  
Different Depths ◽  
Growth Experiments

The lysimeter installation described comprises 36 concrete tanks each with a soil surface of 4 m2. The installation is useful for plant growth experiments under natural conditions involving different treatment combined with various controlled water supplies. The ground installation is at least 20 cm below the soil surface and tillage can be done with field implements. The lysimeter tanks are provided with a drainage system which can drain the soil at the bottom (100 cm depth) to a tension of up to 100 cm. A constant ground-water table at less than 100 cm soil depth can also be maintained. The soil moisture content at different depths is determined from an underground tunnel by use of gamma radiation equipment in metal tubes horizontally installed in the soil. Rainfall is prevented by a movable glass roof automatically operated and controlled by a special rain sensor. Water is applied to the soil surface with a special trickle irrigation system consisting of a set of plastic tubes for each lysimeter tank and controlled from the tunnel. Fertilizers in controlled amount can be applied with the irrigation water.

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