关键词: 密云水库, 板栗林, 养分元素, 生物循环

Abstract: The effectiveness of fishway is fundamental for evaluating the value of fishway construction and optimization. Monitoring the fishway is the key to judging the effectiveness of fishway. Here we introduced the specific contents of fishway effectiveness monitoring, including monitoring of upstream/downstream of dam fish resources, fishway entrance and exit monitoring, internal fishway monitoring, post-passage monitoring. Fishway effectiveness monitoring methods (fish trap, blocking method, electrofishing, video monitoring, hydroacoustic monitoring, and telemetry) were introduced in detail, with the strengths and weaknesses of which being analyzed. Future development of fishway effectiveness monitoring should include:  Further strengthening postpassage monitoring and fish physiology monitoring;  Continuously improving monitoring methods to enhance the accuracy of instruments and equipment in field;  Fishway effectiveness should be monitored continuously and standardized; and  The development of new, noninjury, accurate, and systematic monitoring methods.

Key words: Miyun reservoir, Castanea mollissima B1 forest, Nutrient elements, Bio-cycling