Biogeochemical processes, climate and land use changes in karst critical zones
Karst is a highly special geomorphology mainly consisting of limestone and dolomite, which is scattered in many areas worldwide, but continuously and widely distributed in southern America, the Mediterranean, and southwestern China. Such dissolutional landforms, caves, and aquifers on soluble rocks create the most beautiful landscapes and tourist resorts, but this fragile landscape also results in many environmental disasters, such as water pollution, drought, and rocky desertification, thereby creating many severe social problems. To rehabilitate the degraded land, we must explore the factors triggering such degradation in geology, hydrology, ecology and human activities. Among them, carbonate-soil-water-CO2-organism interaction in karst critical zones under climate and land-use changes is fundamental and crucial. The proposed symposium aims to investigate carbon, water and nitrogen cycles as well as their interactions with climate change and land use modifications in karst critical zones worldwide. To fully reveal biogeochemical processes of key elements in hydrosphere, lithosphere, pedosphere, atmosphere and biosphere, field surveys, experiments and modellings in multi-discipline and multi-scale from sites, watersheds, catchments to regional and global spatial scales and from daily, annual to decadal and millennial temporal scales are all essential and welcome. Incorporating scientific researches into policy-making and land management is also the focus of the symposium.
Shijie Wang, Junhua Yan, Zaihua Liu and Jian Ni