Harvesting Forests
As the forest products are commercial in nature, they have a global,
commercial potential; they are on the increase, as well. Japan and the West
European countries import timber products in very large quantities. Timber
industry is likely to grow, according to the experts, to 6 billion trees from
the present 3 billion trees. In the developed countries, 200 million tonnes of
wood pulp is produced. As the literacy is increasing in the developing
countries, there is greater use of newsprint. In countries like Brazil and
India, the use of newsprint has already doubled.
As hard wood is required for industrial purposes, it is mostly obtained
from the tropical forests. Wood is exported in great quantities from the
Southeast Asian countries. In these countries, more than half the trees in the
forests have been felled for this purpose. Only in recent times, the
Governments of these countries have taken efforts towards preventing the
destruction of the forests.
Shrinking Forests
Twelve million hectares of forests are being cut every year, for use by
human beings. The area of annual forest destruction is estimated at an area
which is as big as the United Kingdom. The fast declining forests have brought
in changes in the functions of ecosystems. A forest being destroyed for meeting
the needs of the humankind can be replaced in about 10 years. On the contrary,
the areas of deforestation used by humans for agriculture and settlements usher
in changes in the ecosystem configurations.
Problems. If the
vegetation systems at the watershed areas
are destroyed, they give rise to several problems. As long as the forests
in these areas survive, the waters of the rivers could be pure and clear. But
as we destroy the forests in these areas, there could be floods and droughts in
the low reaches. Furthermore, as a result of soil erosion along the slopes,
there is siltation in the floodplains.
With the
siltation, dams where hydroelectricity is produced and fishing are greatly
affected.
With the destruction of tropical forests, the climate is also impacted
upon. The forest ecosystems of the Amazon absorb most of the solar radiation.
As it is destroyed, progressively, the area is heated up by the radiation which
in turn heats the atmosphere; this affects the atmospheric equilibrium. This is
thus a reason for global warming.
Forest Management. Tropical and temperate ecosystems consist of different biomes. As such, the managerial strategies must differ
as well. To protect the ecosystems, the following strategies are being
followed: Renewal of the watershed, social forestry and sustainable systems.
Renewal of the Watershed. Several countries of the world have come to realise the importance of the forests. In response, they have
begun to renew the forests of the watersheds. But such efforts are a few and at
small scales. It is expected that such strategies would become widespread.
Social Forestry. Internationally, such forests have been welcomed in several countries. The governments of
these countries motivate their people to grow social forestry to meet the needs
of fuelwood. In India, in the several states of the Union, school children grow
trees under this programme.
Sustainable System. Agro-forests have become in many places sustaining systems. In these forests, crops and trees are grown
side by side. Unutilised forest areas and the field edges have now become
important resources for increasing crop productivity. Particular tree varieties
help fix nitrogen in the soil. As a consequence, lands of low quality are
turned into lands that could be utilised for cropping.
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