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.

The grasslands and wetlands of the Sekhukhuneland Centre of Plant Endemism, South Africa

Bothalia ◽  
2002 ◽  
Vol 32 (2) ◽  
pp. 211-231 ◽  
Author(s):  
S. J. Siebert ◽  
A. E. Van Wyk ◽  
G. J. Bredenkamp ◽  
F. Du Plessis
Keyword(s):  
Land Use Planning ◽  
Environmental Gradients ◽  
Conservation Status ◽  
Hierarchical Classification ◽  
Community Diversity ◽  
General Description ◽  
Twinspan Classification ◽  
New Syntaxa ◽  
Floristic Data ◽  
Plant Endemism

A hierarchical classification, description, and ecological and floristic interpretations are presented on the vegetation types of the grasslands and wetlands of the Sekhukhuneland Centre of Plant Endemism. Relevés were compiled in 74 stratified random plots. A TWINSPAN classification, refined by Braun-Blanquet procedures, revealed eight associations. 11 subassociations and four variants. Many new syntaxa are described and ecologically interpreted. For each syntaxon. the species richness, endemism and conservation status was determined. 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 further research. An ordination (DECORANA). based on floristic data, confirmed the relationships that exist between plant communities and associated habitats and environmental gradients. Much of the plant community diversity and distribution can be ascribed to a heterogeneous environment, predominantly determined by soil moisture.

scholarly journals Semi-arid savanna of the Potlake Nature Reserve and surrounding areas in Sekhukhuneland, South Africa

Koedoe ◽  
2003 ◽  
Vol 46 (1) ◽  
Author(s):  
S.J. Siebert ◽  
M. Matthee ◽  
A.E. Van Wyk
Keyword(s):  
Plant Community ◽  
Plant Communities ◽  
Land Use Planning ◽  
Environmental Gradients ◽  
Conservation Status ◽  
Hierarchical Classification ◽  
General Description ◽  
Surrounding Areas ◽  
Floristic Data ◽  
Semi Arid

A hierarchical classification, description, and ecological and floristic interpretations are presented on the vegetation types of the semi-arid northern savanna of the Sekhukhuneland Centre of Plant Endemism. Relevés were compiled in 47 stratified random plots. A TWINSPAN classification, refined by Braun-Blanquet procedures, revealed eight plant communities, classified as four associations, one of which is subdivided into five sub-associations. For each plant community, the floristic richness, endemism and conservation status was determined. Much of the plant community distribution can be ascribed to environmental factors and anthropogenic disturbance. An ordination (DECORANA), based on floristic data, showed environmental gradients that possibly exist between plant communities and associated habitats. The floristic information, proposed classification, general description and vegetation key, can be used for the identification and monitoring of protected areas, land-use planning, and further conservation research.

scholarly journals Plant communities of the forests, woodlands and thickets in northern KwaZulu-Natal

Koedoe ◽  
1997 ◽  
Vol 40 (1) ◽  
Author(s):  
H.C. Eckhardt ◽  
N. Van Rooyen ◽  
G.J. Bredenkamp
Keyword(s):  
Species Richness ◽  
Random Sample ◽  
Plant Communities ◽  
Environmental Gradients ◽  
Woody Vegetation ◽  
Kwazulu Natal ◽  
Twinspan Classification ◽  
Floristic Data

An analysis of the woody vegetation of northern KwaZulu-Natal is presented. Releves were compiled in 102 stratified random sample plots. A TWINSPAN classification, refined by Braun-Blanquet procedures, revealed 24 plant communities, also referred to as vegetation units. For each of these vegetation units, the species richness was determined. Four associations were identified which have a conservation importance. An ordination (DECORANA), based on floristic data, revealed the position of the syntaxa on environmental gradients.

scholarly journals The phytosociology of the De Rust section of the Mountain Zebra National Park, Eastern Cape

Koedoe ◽  
2000 ◽  
Vol 43 (1) ◽  
Author(s):  
L.R. Brown ◽  
H. Bezuidenhout
Keyword(s):  
South Africa ◽  
Plant Communities ◽  
National Park ◽  
Eastern Cape ◽  
Vegetation Survey ◽  
Conservation Areas ◽  
Vegetation Map ◽  
Diagnostic Species ◽  
Twinspan Classification

As part of a vegetation survey programme for conservation areas in South Africa, the plant communities of the De Rust section of the Mountain Zebra National Park were investigated. From a TWINSPAN classification, refined by Braun-Blanquet procedures, 14 plant communities, which can be placed into six major groups, were identified. A clas- sification and description of these communities, as well as a vegetation map are presented. Associated gradients in habitat were identified by using an ordination algorithm (DECORANA). The diagnostic species as well as the prominent and less conspicuous species of the tree, shrub, herb and grass strata are outlined.

scholarly journals The phytosociology of the northern section of the Borakalalo Nature Reserve

Koedoe ◽  
1996 ◽  
Vol 39 (1) ◽  
Author(s):  
L.R. Brown ◽  
G.J. Bredenkamp ◽  
N. Van Rooyen
Keyword(s):  
Plant Communities ◽  
Wildlife Management ◽  
Nature Reserve ◽  
Hierarchical Classification ◽  
Management Programme ◽  
Vegetation Map ◽  
Diagnostic Species ◽  
Twinspan Classification ◽  
Ecological Basis

After classifications and descriptions of the southern and western sections of the Borakalalo Nature Reserve were published, a study on the phytosociology of the northern part was initiated. The study is aimed at providing an ecological basis for establishing an efficient wildlife management programme for the reserve. From a TWINSPAN classification, refined by Braun-Blanquet procedures, 15 plant communities, which can be grouped into six major plant communities, were identified. Descriptions of the various plant communities, include diagnostic species, prominent species and less conspicuous species of the tree, shrub, forb and grass strata. A hierarchical classification, description of the plant communities and a vegetation map are presented.

A preliminary floristic classification of southern and northern Victoria Land vegetation, continental Antarctica

2008 ◽  
Vol 20 (6) ◽  
pp. 553-562 ◽  
Author(s):  
Nicoletta Cannone ◽  
Rodney Seppelt
Keyword(s):  
Plant Communities ◽  
Environmental Gradients ◽  
Similarity Index ◽  
Hierarchical Classification ◽  
Principal Component ◽  
Floristic Composition ◽  
New Classification ◽  
Victoria Land ◽  
Continental Antarctica

AbstractThis paper proposes a new objectively-generated vegetation classification for southern and northern Victoria Land (continental Antarctica) based on the floristic composition of the plant communities. The new classification aims to integrate the existing physiognomic classification of the cryptogamic Antarctic tundra, provide useful data on floristic composition and distribution of the vegetation occurring in southern and northern Victoria Land, and develop a suitable tool allowing easy comparison of syntaxa from different locations. Field data from 26 sites along a latitudinal gradient (72°–77°S) were analysed by a hierarchical classification integrated with multivariate statistics, including indirect ecological information (Principal Component Analysis). Similarity of the identified groups was assessed through the Jaccard similarity index. The new classification is compatible with previous ones and is widely applicable to Victoria Land and includes previous classification. This standardized approach relates plant communities to their floristic composition and provides a basis for relating vegetation composition to environmental gradients and to patterns of vegetation dynamics and succession which are still poorly understood in Antarctica.

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 The phytosociology of the western section of Borakalalo Nature Reserve

Koedoe ◽  
1995 ◽  
Vol 38 (2) ◽  
Author(s):  
L.R. Brown ◽  
G.J. Bredenkamp ◽  
N. Van Rooyen
Keyword(s):  
South Africa ◽  
Plant Communities ◽  
Nature Reserve ◽  
Vegetation Survey ◽  
Conservation Areas ◽  
Vegetation Map ◽  
Diagnostic Species ◽  
Twinspan Classification

As part of a vegetation survey programme for conservation areas in South Africa, the plant communities of the western section of the Borakalalo Nature Reserve were investigated. From a TWINSPAN classification, refined by Braun-Blanquet procedures, 19 plant communities, which can be grouped into eleven major groups, were identified. A classification and description of these communities, some of which have a karoo affinity, are presented. The diagnostic species, as well as the prominent and less conspicu- ous species of the tree, shrub, herb and grass strata are outlined. A vegetation map is included.

Threatened Limestone Fynbos plant communities of Andrew’s Field and Tsaba-Tsaba Nature Reserve, Western Cape

Bothalia ◽  
2007 ◽  
Vol 37 (1) ◽  
pp. 89-102
Author(s):  
M. M. Zietsman ◽  
G. J. Bredenkamp
Keyword(s):  
Plant Communities ◽  
Endemic Species ◽  
Nature Reserve ◽  
Environmental Gradients ◽  
Floristic Composition ◽  
Cape Floristic Region ◽  
Western Cape ◽  
Data Set ◽  
Floristic Data ◽  
The Relationship

The vegetation of inland plains and hills of the Andrew’s Field and Tsaba-Tsaba Nature Reserve, Bredasdorp District, Western Cape was classified using TWINSPAN and Braun-Blanquet procedures. The resulting four plant communities and nine subcommunities were described and interpreted ecologically. The vegetation was sampled using 97 randomly stratified plots. The floristic composition, Braun-Blanquet cover-abundance of each species, and various environmental variables were recorded in each sample plot. The relationship between the vegetation units and the associated environmental gradients was confirmed by ordination, using the DECORANA computer program, applied to the floristic data set. The conservation priority of each vegetation unit was determined by taking the occurrence of Red Data List species, limestone endemic species and Cape Floristic Region endemic species into consideration. TTie distribution of the plant communities can mainly be ascribed to differences in the clay/sand content of the soil and the degree of exposure of the vegetation to the dominating winds (southeastern and northwestern) of the area.

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.

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