"The term biodiversity is of recent origin; it was not until early 1990s that it appeared several times in varied reputed journals world over. Despite its increasing use in the present context, the term has remained remarkably vague and variously defined. Simply put, biodiversity can be defined as the variety of life on Earth at all levels: from genes to species to ecosystems - but more commonly biodiversity is referred to as the study of species. According to the Global Convention on Biological Diversity (CBD), signed in 1992 at the Earth Summit, biodiversity is the â€˜variability among all living organisms from all sources, including terrestrial, marine and other aquatic ecosystems and ecological complexes of which they are part, this includes diversity within species, between species and of ecosystemsâ€™. The diversity of nature is the result of an evolutionary process that started about two billion years ago. It is, however, being destroyed at an incredible speed, the rain forests are a case in point. The number of species endangered by human activities and the number of natural or semi natural habitats being destroyed, fragmented or changed are constantly growing, which destabilises ecosystems and cause the loss of vital resourc
India ranks among the top ten species-rich nations and shows high endemism. As per the 4th National Report on Biological Diversity (2009), Govt. of India, in India, so far over 91,200 species of animals and 45,500 species of plants have been documented in its ten biogeographic regions.