HOTANI, Mass Extinction - It's all becos of humans. Humans nabhaeko bhae kati ramro huntyo ni ta, sabai prani bachthe ni. Land use change patterns like , for eg., rampant deforestation has lead to fragmentation of landscapes and the resultant loss of biodiversity at local and global scale. When human induced land use changes effect combines with possible future climate change scenarios like global warming effect(increase in greenhouse gases like CO2), then their combined synergistic effect will increases the rate of biodiversity loss. Pisces readi these books: Peters and Lovejoy (1989) Global Warming and Biodiversity. Yale Press. R. DeFries, G. Asner and some other guy (2004) Ecosystems and use change. AGU Monograph.[this book just came out]