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Rodung des Regenwaldes
there are more species of plants and animals in tropical rain forests than in all the rest of the worlds ecosystems combined.
about 70% of all plant species in these forests are trees.
rain forests are now being cleared at an ever-increasing rate world-wide because of commercial timber cutting and the agricultural needs of expanding populations.
this large-scale destruction is leading to the greatest number of plant and animal extinctions ever experienced on earth.
it is also resulting in increasing levels of carbon dioxide in the atmosphere, because of the burning and decay of the felled trees and the removal of rain forest plants as users of carbon dioxide (during photosynthesis).
tropical rain forests are characteristic of central Africa and the Amazon watershed
plant growth is profuse and because the fall and regrowth of leaves occur gradually throughout each year, the forest is always active.
tree species are highly diverse but usually have smooth, straight trunks and large, simple leaves
large vines are common, but the tangled growth of a jungle occurs only where the normal forest area has been abused or at a rivers edge
temperate evergreen forests are found in the subtropical regions of North America and the Caribbean islands that have a warm maritime climate. The type is best developed along the Gulf Coast and in the Florida Everglades. The characteristic trees are live oak, magnolia, palms and bromeliads.
temperate rain forests, with broad-leaved evergreen trees, are common on Mediterranean coasts. Rainfall may be low, but the ocean-cooled air is moisture laden, and fogs are frequent. In the United States the temperate West Coast rain forests are dominated by hemlock, cedar, spruce, fir and redwood.
tropical rain forests are situated between the 10th degree of the northern and southern latitude.
most of the animals are insects.
a coral reef depicts the counterpart among the marine biospheres.
most of the animals which are living in the forests are living up in the trees.
medical substances can be gained from the forests.
it would take several hundred years until the forests would have recovered to its original state.
nearly 100.000 km2 disappear annually.
Rodung des Regenwaldes
Autoren: Klasse 11-3 (97/98), teacher Christine Hartmann, Web: Mathias Schönmann
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