LAUSR

The implementation of value assessments and analysis of the effectiveness of protection of different types of threatened and endangered species has become a key issue in biodiversity research. Current research into threatened and endangered species focuses on defining the level of endangerment and determining the priority of protection, and it is subject to problems, such as cross⁃management of different protection levels, lack of value assessment methods, and repetitive calculations. In this study, the number of different endangered species in Xiamen was determined using the IUCN endangered grade and the list of endemic species in China. Based on this, the emergy / GDP ratio was used to estimate the number of threatened and endangered species in Xiamen City. According to the collected, summarized, and analyzed