Mechanisms and effects of agro-pastoral system coupling in the Inner Mongolian ecotone PHENOLOGICAL CALENDAR OF STIPA KRYLOVII STEPPE IN INNER MONGOLIA, CHINA AND ITS CORRELATION WITH CLIMATIC VARIABLES Artemia population characteristics in different conditions, and environmental carrying capacity in small saline lakes in the Inner Mongolian desert DYNAMICS SIMULATION OF NET PRIMARY PRODUCTIVITY BY A SATELLITE DATA-DRIVEN CASA MODEL IN INNER MONGOLIAN TYPICAL STEPPE, CHINA