Abstract: Bohai Bay coast is one of the most important habitats for migratory shorebirds along the East AsiaAustralasian Flyway. However, the habitats are facing severe degradation and loss due to human activities. Assessing habitat suitability and identifying key areas are of great importance for the biodiversity conservation. We evaluated habitat suitability of Bohai Bay coasts in 2000 and 2015 with MaxEnt model based on the datasets including shorebirds occurrence data and environmental factors. The results showed that land use/cover, NDVI, mean annual temperature and aspect were the main factors affecting the distribution of shorebirds. Shorebirds mainly distributed at the coastal wetlands of southern Tangshan and Tianjin. From 2000 to 2015, the area of suitable habitats for shorebirds varied among different regions. The increments of suitable habitats were mainly located in southern Tianjin and southeastern Shandong, while the decrements were mainly located in Fengnan and Huanghua of Hebei, and Ninghe County of Tianjin. By identifying the distribution range of suitable habitats of shorebirds in the Bohai Bay, our results provide supports for shorebirds conservation and habitat management.

Key words: clone, exponential fertilization, chlorophyll fluorescence.