A vegetation survey, on the plant community level of organization, was conducted on the Mfabeni swamp on the eastern shores of Lake St Lucia. The survey included both the sedge/grass swamp and the swamp forest. Mfabeni swamp is a peatland with peat up to 10m in depth. Except for limited studies in Lesotho and KwaZulu-Natal, this is a first vegetation survey on the plant community level of peatland vegetation in southern Africa. Total floristic composition and habitat information were recorded in 214 sample plots, fully referenced by GPS for GIS mapping. The data were captured in the TURBOVEG data base for vegetation data, classified using the TWINSPAN numerical classification algorithm and phytosociological tables were compiled using the MEGATAB computerized table management program. Fourteen plant communities were identified, characterized by diagnostic and dominant species, described, and the localities noted by GIS. The data were also processed by the PCOrd numerical ordination program and the axes of the resulting ordination diagrams were related to environmental conditions. This gave an indication of the environmental factors controlling the existence and distribution patterns of the different plant communities. An ordination was run on the habitat data collected to further illustrate the relationship between the plant communities and environmental variables. It seems that water depth, seasonality of the water depth and certain water chemical properties, such as pH conductivity and dissolved oxygen content of the water play an important role in determining floristic composition and therefore plant community type in the Mfabeni swamp.
Dissertation (MSc(Botany))--University of Pretoria, 2006.
Lange, A. Lucia; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B.(Pretoria : The Government Printer, 1980)
Cell cultures prepared from the spleen and mesenteric lymph nodes of affected kittens were subjected to histochemical and ultrastructural studies. Macrophages in the cultures contained lipid in the cytoplasm and the ...
Spurdle, Amanda B.; Whiley, Phillip J.; Thompson, Bryony; Feng, Bingjian; Healey, Sue; Brown, Melissa A.; Pettigrew, Christopher; Van Asperen, Christi J.; Ausems, Margreet G.E.M.; Kattentidt-Mouravieva, Anna A.; Van den Ouweland, Ans M.W.; Lindblom, Annika; Pigg, Maritta H.; Schmutzler, Rita K.; Engel, Christoph; Meindl, Alfons; Caputo, Sandrine; Sinilnikova, Olga M.; Lidereau, Rosette; Couch, Fergus J.; Guidugli, Lucia; Hansen, Thomas V.O.; Thomassen, Mads; Eccles, Diana M.; Tucker, Kathy; Benitez, Javier; Domchek, Susan M.; Toland, Amanda E.; Van Rensburg, Elizabeth J.; Wappenschmidt, Barbara; Borg, Ake; Vreeswijk, Maaike P.G.; Goldgar, David E.(BMJ Publishing Group Ltd, 2012-08)
BACKGROUND: Clinical classification of rare sequence changes identified in the breast cancer susceptibility genes BRCA1 and BRCA2 is essential for appropriate genetic counseling of individuals carrying these variants. We ...
In prokaryotes, genomic distance is a feature that in addition to coregulation affects coexpression.
Several observations, such as genomic clustering of highly coexpressed small
regulons, support the idea that coexpression ...