Christian Körner is Professor emeritus from the University of Basel, Switzerland, and got his academic training in Innsbruck, Austria. His involvement in this book arises from his expertise in alpine plant life and alpine treeline research with an emphasis on global comparisons, on which he published two Springer books. Körner is a member of several academies of science and a foreign honorary member of the Ecological Society of America. He founded and chaired the Global Mountain Biodiversity Assessment for 15 years. He published more than 300 scientific articles and is one of the most highly cited authors in plant ecology. His many visits to the Caucasus date back to 1979, in 2014 he was awarded a Dr. h.c. from Ilia University, Tbilisi, Georgia. George Nakhutsrishvili is an Emeritus Professor at Ilia State University, Tbilisi, Georgia, as well as the Head of Department of Plant Systematics and Geography at Tbilisi Institute of Botany. He is a member of the Georgian and Austrian Academies of Sciences. He also serves as the Focal Point of the Caucasus Plant Red List Authority, IUCN.  He has previously worked as the Director of Tbilisi Institute of Botany for 25 years. His research interest is primarily in studies of alpine plant diversity and ecology, phytosociology, and plant Red Listing. He has published more than 200 papers and completed work on 12 books. Otar Abdaladze is a Professor of Ecology at Ilia State University, Tbilisi, Georgia. He also serves as the director of Alpine Ecosystems Research Program in the Institute of Ecology of this university. He has previously worked as Deputy Director and Head of the Department of Ecology of Alpine Plant Vegetation of Tbilisi Institute of Botany. His research interest is primarily in plant functional ecology and diversity. He has published about 70 papers and four books. He serves as a member of the editorial board of the scientific journal Applied Ecology and Environmental Research. Ketevan Batsatsashhvili is an Associate Professor of Botany at Ilia State University, Tbilisi, Georgia. She also serves as the Programme Officer of the Caucasus Plant Red List Authority, IUCN.  She has previously worked as a Researcher at Tbilisi Institute of Botany and Ivane Javakhishvili State University of Tbilisi. Her research interest is primarily in studies of plant and lichen diversity and Red Listing, ethnobotany and ethnolichenology. She has published about 25 papers and completed work on chapters of two books. Eva Spehn is coordinating the Global Mountain Biodiversity Assessment (GMBA), a core project of Future Earth in Switzerland, since its start in 2000. She received her PhD in plant ecology at the University of Basel with Prof. Körner. Several joint GMBA research projects with the co-editors got her involved in this book, on mountain biodiversity in the Caucasus, on georeferenced biodiversity databases,and on effects of land use change on alpine biodiversity and ecosystem functions in the Caucasus. She has published 30 scientific articles and edited 3 books and several special journal issues on Mountain Biodiversity.