A quantitative method for assessing lake ecosystem health Aquatic ecological integrity assessment of four large lakes in the middle-to-lower reaches of the Yangtze River, China Beneficiary analysis and ecological production function to measure lake ecosystem services for decision-making in China Reconstructions and simulations of nutrient evolution in Poyang Lake over the past 300 years Valuation of changes of ecosystem services of Tai Lake in recent 10 years Principles and approach for lake ecological restoration