Biological diversity or biodiversity refers to the diversity, or variety, of
plants and animals and other living things on earth. There are many levels of
diversity-from DNA and genes to species, populations, ecosystems, and
communities. This diversity is the beauty of nature and is essential for the
survival of human beings. Life on Earth would not exist if its rich biodiversity
were severely altered. Species and the ecosystems in which they live are linked
together though the flows of energy and materials. A change in the life of one
species could ripple throughout an ecosystem, changing the life of many other
species, including humans. But due to