The original settlers of
Madagascar probably came by boat from the Polynesia or from
Africa only two thousand years ago, bringing with them a
destructing farming technique. This technique is known as
tavy, a farmer cuts a portion of the forest and then
burns it and then plants crops. Large areas of forest where are
transformed into wastelands, upon which nothing can grow.
Sadly, much of Madagascar has
been destroyed, by the gradual action of small farmers and
herdsmen. Human populations have grown long beyond the point at
which these activities can be practiced without permanent
destruction. As the forest is destroyed, so is the habitat for
Madagascar's unique plant and animal species. The loss of
habitat due to deforestation is the biggest single threat to
Madagascar's wildlife. Although the exact extent of forest loss
is not known with certainty, only 10 percent of Madagascar's
forests remain. Also, recent estimates suggest that 1-2 percent
of Madagascar's remaining forests are destroyed each year, and
that a staggering 80-90 percent of Madagascar's land area burns
each year.
Although much of the forest
destruction may have come about at the hand of the small farmer
or herdsman, the causes of environmental degradation are deeply
rooted in social, economic, political and historical factors.
Madagascar is one of the world's poorest nations, with a per
capita income of approximately $240 per year. About 80 percent
of the population are subsistence farmers, many of whom depend
entirely on "natural capital" to support their way of life. Yet
this way of life is time-limited: as the forest is destroyed so
tavy must also end. At the moment, however, many farmers
continue to practice traditional slash and burn agriculture
because it is their culture, and because they know no other way
and have no other means to survive.
Rural people depend on the
forest in other ways, and in so doing, pose other threats to
this tremendously important resource. In the rainforest, nearby
dwellers may use several hundred species of plants and animals
for food, shelter, firewood, medicines, fiber, resin,
construction, household implements and clothing. Sometimes, as
in the case of the most sought-after species, over-collection or
over-hunting is now leading to depletion and local extinction of
precious biological and natural resources. Indeed, the
extinction of several large-bodied lemur species and of the
elephant bird (a member of the ostrich family that weighed up to
half a ton) within the past several thousand years may have been
due at least in part to over-hunting by the early human
inhabitants of Madagascar.