scholarly journals The vegetation of the north-western Orange Free State, South Africa. 2. The D land type

Bothalia ◽  
1990 ◽  
Vol 20 (2) ◽  
pp. 241-248 ◽  
Author(s):  
M. S. Kooij ◽  
G. J. Bredenkamp
Keyword(s):  
Plant Communities ◽  
Environmental Gradients ◽  
Hierarchical Classification ◽  
Research Programme ◽  
Free State ◽  
Numerical Classification ◽  
Land Type ◽  
The North ◽  
Grassland Biome ◽  
North Western

As part of a research programme on the synthesis of the vegetation of the western Grassland Biome, the plant communities of the D land type of the north-western Orange Free State were investigated. The results of a numerical classification (TWINSPAN) of 59 reievés were refined by Braun-Blanquet procedures. The analyses revealed eight plant communities which may be grouped into two major communities. A hierarchical classification, description and ecological interpretation of the plant communities, and an ordination (DECORANA) with associated environmental gradients, are presented.

scholarly journals Classification of the vegetation of the B land type in the north-western Orange Free State

1990 ◽  
Vol 56 (3) ◽  
pp. 309-318 ◽  
Author(s):  
M.S. Kooij ◽  
G.J. Bredenkamp ◽  
G.K. Theron
Keyword(s):  
Free State ◽  
Land Type ◽  
The North ◽  
North Western

The vegetation of the northeastern Orange Free State, South Africa: physical environment and plant communities of the Ea land type

Bothalia ◽  
1993 ◽  
Vol 23 (1) ◽  
pp. 117-127 ◽  
Author(s):  
H. C. Eckhart ◽  
N. Van Rooyen ◽  
G. J. Bredenkamp
Keyword(s):  
South Africa ◽  
Plant Communities ◽  
Physical Environment ◽  
Environmental Gradients ◽  
Free State ◽  
Vegetation Types ◽  
Land Type ◽  
Twinspan Classification

The research was carried out in the Ea land type of the northeastern Orange Free State, with the objective of reclassifying and refining Acocks’s veld types. TWINSPAN classification results were further refined by Braun-Blanquet procedures. The 100 relev^s distributed over the Ea land type resulted in the recognition of four major vegetation types which may be divided into nine plant communities. The communities were hierarchically classified, described and ecologically interpreted. DECORANA ordination was used to determine vegetation/environmental gradients and relationships.

scholarly journals Die plantgemeenskappe van die Ba-landtipe in die Mooirivieropvanggebied, Transvaal

1991 ◽  
Vol 10 (2) ◽  
pp. 85-92 ◽  
Author(s):  
H. Bezuidenhout
Keyword(s):  
Nature Conservation ◽  
Plant Communities ◽  
Soil Type ◽  
Habitat Characteristics ◽  
Clear Distinction ◽  
Conservation Practices ◽  
Numerical Classification ◽  
Habitat Types ◽  
Land Type ◽  
Vegetation Gradients

The aim of this study was to identify, characterize and interpret ecologically, by using habitat characteristics, the major vege­tation units and their variations of the Ba land type. Six plant communities were successfully distinguished through applying a numerical classification (TWINSPAN) and Braun-Blanquet procedures. The plant communities could easily be correlated with specific habitat types. A clear distinction could be made between plant communities of the upland and lowland areas. Vegetation gradients and associated gradients in habitat were identified by using an ordination technique (DECORANA). The studv emphasized the importance of topography and soil type for the delimitation of management units for farming or nature conservation practices.

scholarly journals Plantegroeiklassifikasie van die A-landtipe van die Mooirivier - opvanggebied, Transvaal

1991 ◽  
Vol 10 (1) ◽  
pp. 4-10
Author(s):  
H. Bezuidenhout
Keyword(s):  
Nature Conservation ◽  
Plant Communities ◽  
Soil Type ◽  
Habitat Characteristics ◽  
Clear Distinction ◽  
Conservation Practices ◽  
Numerical Classification ◽  
Habitat Types ◽  
Land Type ◽  
Vegetation Gradients

The aim of this study was to identify, characterize and interpret ecologically, by using habitat characteristics, the major vege­tation units and their variations of the A land type. Five plant communities were successfully distinguished by applying a numerical classification and Braun-Blanquet procedures. The plant communities could easily be correlated with specific habitat types. A clear distinction could be made between plant communities of the upland and lowland areas. Vegetation gradients and associated gradients in habitat were identified by using an ordination technique. The study emphasized the importance of topography and soil type for the delimitation of management units for farming or nature conservation practices.

The vegetation of the north-western Orange Free State, South Africa. 1. Physical environment

Bothalia ◽  
1990 ◽  
Vol 20 (2) ◽  
pp. 233-240
Author(s):  
M. S. Kooij ◽  
G. J. Bredenkamp
Keyword(s):  
South Africa ◽  
Physical Environment ◽  
Vegetation Classification ◽  
Free State ◽  
The North ◽  
Contextual Framework ◽  
Land Types ◽  
North Western

The physiography, geology, soil, land types and climate of the north-western Orange Free State are described. The description provides a contextual framework for the subsequent vegetation classification.

scholarly journals The phytosociology and syntaxonomy of relatively low-altitude areas in the North-eastern Mountain Sourveld, in the eastern Transvaal escarpment region

Koedoe ◽  
1994 ◽  
Vol 37 (2) ◽  
Author(s):  
W.S. Matthews ◽  
G.J. Bredenkamp ◽  
N. Van Rooyen
Keyword(s):  
Random Sample ◽  
Plant Communities ◽  
Environmental Conditions ◽  
Hierarchical Classification ◽  
Soil Surface ◽  
The North ◽  
North Eastern ◽  
Low Altitude

An analysis of the vegetation of the relatively low altitude regions of the North-eastern Mountain Sourveld of the eastern Transvaal escarpment is presented. Releves were compiled in 53 stratified random sample plots. ATWINSPAN-classification, refined by Braun-Blanquet procedures, revealed seven plant communities. In the hierarchical classification one class, one alliance, four associations, four subassociations and two valiants are recognised. Formal syntaxonomic descriptions of the syntaxa are given. All communities are related to specific environmental conditions, of which geology, aspect, altitude and rockiness of the soil surface are the most important.

scholarly journals Vegetation of the rock habitats of the Sekhukhuneland Centre of Plan Endemism, South Africa

Bothalia ◽  
2003 ◽  
Vol 33 (2) ◽  
pp. 207-228
Author(s):  
S. J. Siebert ◽  
A. E. Van Wyk ◽  
G. J. Bredenkamp ◽  
F. Siebert
Keyword(s):  
Plant Communities ◽  
Land Use Planning ◽  
Environmental Gradients ◽  
Conservation Status ◽  
Hierarchical Classification ◽  
General Description ◽  
Conservation Areas ◽  
Twinspan Classification ◽  
New Syntaxa ◽  
Floristic Data

A hierarchical classification, description, and ecological and floristic interpretations are presented on the vegetation types of the ultramafic rock habitats of the Sekhukhuneland Centre of Plant Endemism. Relevés were compiled in 100 stratified random plots. A TWINSPAN classification, refined by Braun-Blanquet procedures, revealed 17 plant communities, which are classified into 13 associations belonging to four proposed alliances. Many new syntaxa are ecologically interpreted and described. For each syntaxon, the species richness, endemism and conservation status was determined. Much of the plant community distribution can be ascribed to specific habitat preference. The floristic and habitat information, proposed classification, general description and vegetation key are provided to aid future identification of conservation areas, land use planning and research. An ordination (DECORANA) based on floristic data confirmed potential relationships that could exist between the plant communities and associated habitats and environmental gradients.

scholarly journals An ecological study of the plant communities in the proposed Highveld National Park, in the peri-urban area of Potchefstroom, South Africa

Koedoe ◽  
2010 ◽  
Vol 52 (1) ◽  
Author(s):  
Mahlomola E. Daemane ◽  
Sarel S. Cilliers ◽  
Hugo Bezuidenhout
Keyword(s):  
South Africa ◽  
Plant Communities ◽  
National Park ◽  
Environmental Planning ◽  
Detrended Correspondence Analysis ◽  
Floristic Composition ◽  
North West ◽  
The North ◽  
High Conservation ◽  
Grassland Biome

The proposed Highveld National Park (HNP) is an area of high conservation value in South Africa, covering approximately 0.03% of the endangered Grassland Biome. The park is situated immediately adjacent to the town of Potchefstroom in the North-West Province. The objective of this study was to identify, classify, describe and map the plant communities in this park. Vegetation sampling was done by means of the Braun-Blanquet method and a total of 88 stratified random relevés were sampled. A numerical classification technique (TWINSPAN) was used and the results were refined by Braun-Blanquet procedures. The final results of the classification procedure were presented in the form of phytosociological tables and, thereafter, nine plant communities were described and mapped. A detrended correspondence analysis confirmed the presence of three structural vegetation units, namely woodland, shrubland and grassland. Differences in floristic composition in the three vegetation units were found to be influenced by environmental factors, such as surface rockiness and altitude. Incidences of harvesting trees for fuel, uncontrolled fires and overgrazing were found to have a significant effect on floristic and structural composition in the HNP. The ecological interpretation derived from this study can therefore be used as a tool for environmental planning and management of this grassland area.Conservation implications: Grasslands are amongst the most threatened and least conserved vegetation biomes in South Africa, with less than 1.3% currently being conserved. The HNP has significant value for biodiversity conservation and the protection of this area will contribute to the preservation of the highly threatened Highveld vegetation types. 

Middle-scale geobotanical mapping of the North-Western Cisbaikalia with regard to the evolutionary and dynamic vegetation trends

2015 ◽  
pp. 42-61
Author(s):  
E. E. Korolkova
Keyword(s):  
Plant Communities ◽  
Actual State ◽  
General Development ◽  
Structural Dynamic ◽  
Vegetation Map ◽  
Mapping Model ◽  
The North ◽  
Great Species ◽  
North Western ◽  
Coenotic Diversity

The problem of rational use of natural resources of the Cisbaikalia is related to the study of vegetation, assessment of its actual state, extent of disturbance, as well as the prediction of dynamic trends. The investigated territory of the North-Western Cisbaikalia lies within the area of contacts of several physiographic and biogeographical boundaries. Great species and coenotic diversity of vegetation associated with it. The present-day vegetation of the region was formed in the late Pliocene – early Quaternary periods. When studying the evolutionary transformation of plant communities palynological, palaeobotanical and radiocarbon methods are used. The diversity of plant communities and their dynamics were reflected on the middle-scale (1 : 500 000) vegetation map. In constructing the mapping model and the legend to the map the vegetation was classified on geographic, genetic and structural-dynamic principles developed by V.B. Sochava and his followers. The results revealed the main regularities of distribution and development of the vegetation of the North-Western Cisbaikalia, identified their disturbance and general development trends.

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