Biodiversity is under serious threat as a result of human activities. The main threats as like population growth, resource consumption, climate change and global warming, habitat conversion and urbanisation, over-exploitation of natural resources, invasive alien species and environmental degradation. Overgrazing, Overharvesting of Selected Species, Pollution, Toxic Discharges, Habitat Alteration, Competition, Narrow Geographical Area, Disease and Parasites, Habitat Aridification, Modification Homogenization of Ecosystems, Natural Disasters, Deforestation, Soil Erosion are other most important threats to biodiversity. Biodiversity provides essential goods for human welfare like as food, fibre, that’s most important. Plant diversity and the many ecosystem services that it provides are a key factor determining human well-being. Biodiversity is losses has-direct and indirect negative effect on living organism. Over the next few decades, as monoculture yields continue to decelerate or decline for many crops, and as demand for ecosystem services continues to rise, diversification could become an essential tool for sustaining development and ecosystem services.