Bushveld in the Dry Season
By late August the bushveld has surrendered most of its colour. The grass that stood waist-high in March now lies flattened and grey; the marula trees have shed their leaves; the smaller pans, full and brimming in February, have cracked open to the sun. A casual visitor might read all this as a kind of dying. Spend a week walking the fence lines and you start to read it differently — as the bushveld doing exactly what it has done every August for at least the last ten thousand years.
The Water Question
When the seasonal pans go, the animals don't. They redistribute. By the third week of August the herds have collapsed onto the two or three permanent waterholes that the reserve maintains through the dry months. A boundary that held twenty zebra in March will hold seventy in August. The same is true of buffalo, kudu, impala, and — following the herbivore concentrations as predictably as the dry season itself — the lion prides that work the same waterholes night after night. The result is a temporary, very local, dramatic increase in pressure on the woody vegetation around each pump. Management's job is to read the pressure early and either move it (by switching off one pump and opening another) or absorb it (by trusting that the rains, when they come, will lift the load).
Fire as a Tool
Fire in the southern reserves is no longer the enemy it was thought to be in the 1960s. The current management plan calls for three classes of burn:
- Cool early-winter burns through the mixed bushwillow, run in late May, to clear the previous summer's grass and stimulate spring growth.
- Hot late-winter burns on selected blocks of moribund grassland, run in early September just before the first rains, to reset the woody encroachment that has come up under the previous year's burn rotation.
- Suppression of any unplanned ignitions during the second half of September, when the fuel load is at its peak and a single lightning strike can take a whole sector.
The trick, every August, is judging whether the season is dry enough for the September block to hold or whether it has tipped into the kind of weather where any flame will run. The team makes that call in the second week of August, from a combination of fuel-moisture readings, the long-range rainfall outlook, and — quietly, off the record — a glance at the marula leaves.
Looking Back at 1992
The reserve still keeps the management logs from 1992, the year the rains failed entirely. By August of that year the senior warden was running daily counts at the boreholes and rationing pumped water to four hours a day. The records describe sable abandoning their traditional ranges and walking thirty kilometres to alternative water, kudu standing all night under the security lights of the field staff quarters, and elephant breaking the wire of the cattle camp at Sterkstroom three nights in a row. Compared to 1992, the present August is a comfortable one. But the comparison is the point: the 1992 logs are not a freak record — they are the bookend of what the bushveld is capable of doing if a season fails. The management plan is built around the assumption that a 1992 will happen again, not whether.
Closing
The dry season is the season in which the bushveld does its honest accounting. Everything alive in late August is what the system can actually support, in the season it is actually having, with the infrastructure it actually has. The rest will arrive with the rain.