This lowland site is situated in a region regularly hit by drought and famine. The woody vegetation consists in an open Acacia-dominated woodland with much acacia regeneration following the crash in herbivory caused by the 1980s drought. The associated famine resulted in mass death and the graves, each planted with an Euphorbia tirucalli, have now turned into a substantial new woodland.
This lowland site near the town of Kobo is located
on a low-lying and flatish hill in the middle of a largeplain. The woodland is
extremely open and typically it is constituted of scattered trees, chiefly Acacia etbaica, with stands of varying
sizes of Opuntia ficus-indica. The
only closed stand of trees is the 1980s graveyard established as a consequence
of the famine and associated massive death toll. Each grave was planted with at
least one Euphorbia tirucalli and
this area now forms a monotypic stand roughly the area of a football pitch.
Some of these euphorbias are even planted before a person is buried, this is
carried out in order to reserve a space in the graveyard.
The other impact of that severe drought has been the
widespread regeneration of Acacia etbaica,
probably the result of seedling release from herbivory following the death of
most, if not all, livestock.
The surrounding countryside is pretty treeless apart
from the intricate agroforestry system existing around settlements, usually at
the base of small hills. The hedges (to height of 4 m) consist chiefly of the
evergreen Euphorbia tirucalli, this
small tree being easily vegetatively propagated.
The main recurrent history of this site is regular extreme drought inducing massive starvation and death of most livestock. The impact on human populations is clearly indicated by the masses of graves and associated planted trees resulting from the death of hundreds of people during the 1980s famine. Even without a major drought the local population is regularly confronted with severe shortages of water.
Its main value is as a potnetially well-stocked
closed canopy woodland in a landscape devoid of native woodland.
The
woodland around the church is very open and contains mainly Acacia etbaica with much planted Opuntia ficus-indica, this species is slowly
spreading. Note the extensive regeneration of Acacia etbaica in the foreground which is thought to have occurred
as a consequence of the 1980s drought and resulting decrease in herbivory.
Overgrazing and
excessive spread of Opuntia ficus-indica
are the two current potential threats.
Management
As one, and maybe two,
cohorts of Acacia etbaica has
successfully become established, the area, if not confronted with excessive
herbivory, will revert to an Acacia
woodland. However, from a conservation point of view it would essential to
either promote the regeneration of other native species or initiate a planting
programme.
Opuntia
ficus-indica
appears to be an essential plant to the local population, they extensively feed
on the fruit when available and the pads are used as cattle fodder. Therefore,
what is required is a management system which contains the spread of the
species rather than removing it from the churchyard.