Biological integrity Lakes 2 Water quality 2 Ammonia 1 Aquatic life use 1 Biochemical oxygen demand 1 Biological conditions 1 Biological integrity index 1 Biomonitoring 1 Chemical attributes 1 Chemical conditions 1 China 1 Dissolved oxygen 1 Drought 1 Dry and wet 1 Dry periods 1 Ecological systems 1 Ecosystem health assessment 1 Ecosystems 1 Fish 1 Fish-based indices 1 Gehu Lake 1 Geophysics 1 Health 1 Hydrological period 1 Ibis ibis 1 Index of Biotic Integrity 1 Index of biotic integrity 1 Integrity indices 1 Jiangsu 1