Conservation

For up-to-date news, activities and calendar of events please visit www.crocodileriverreserve.co.za  

This biodiversity stewardship project aims to provide formal conservation protection for the area of the Rhenosterspruit Nature Conservancy, and beyond. 

* - * - * - * - * - * - *

Egoli Granite Grassland - what is it?

There has been much excitement about Egoli Granite Grassland (EGG) and the opportunity for formal conservation that has opened up in the RNC.  But what is EGG?  Where does it grow? What makes it special?

Egoli Granite Grassland occurs ONLY in Gauteng, and less than 32% of this vegetation type remains untransformed.

The province has a target to conserve and protect 25% of the EGG - clearly with limited EGG left, almost all that remains is special.

The grassland biome has a Rocky Highveld Grassland as a transitional vegetation type between grasslands of the high inland plateau and the bushveld of the lower plateau and is typical of altitudes between 1 500m and 1 600m.

Egoli Granite Grassland is characterised by a high species richness with a patchy dominance of various grass species, and a large variety of forbs (broad leafed herbaceous plant, other than grass), representing a climax or close to climax condition.

During disturbance events, the dominant grass appears to be composed of the secondary species, Hyparrhenia hirta (common thatching grass). The climax of this vegetation type would have been typical to woodland or open savanna dominated by woody species if it were not for the regulatory role fires played upon it.

This is a grassland that is characterized by the presence of:

Themeda triandra,

Tristachya leucothrix,

Setaria sphacelata,

Monocymbium ceresiiforme,

Melinis repens,

Hyparrhenia hirta,

Heteropogon contortus,

Eragrostis racemosa,

Eragrostis curvula,

Eragrostis chloromelas,

Eragrostis capensis,

Digitaria monodactyla,

Cynodon dactylon,

Aristida congesta,

Aristida canescens,

Acalypha angustata,

Acalypha peduncularis,

Becium obovatum,

Crabbea hirsuta,

Cyanotis speciosa,

Dicoma anomala,

Helichrysum rugulosum,

Justicia anagalloides,

Kohautia amatymbica,

Nidorella hottentotica,

Pentanisia prunellioides,

Pseudognaphalium luteo-album,

Senecio venosus and

Cheilanthes hirta