Research Progress on Degradation Factors and Restoration Technologies of Seagrass Beds

Seagrass is a kind of higher flowering plant, as one of the main primary producers of shallow sea waters, seagrass can be accumulated in a large area to form seagrass beds, seagrass bed ecosystems have high biomass and productivity, and coral reef ecosystems and mangrove ecosystems are called three typical marine ecosystems, seagrass beds have important ecological functions, in sediment capture, wind breaking, water quality, carbon sequestration and other important roles.However, since the 80s of the 20th century, due to the influence of natural factors and human factors, seagrass beds are in a state of continuous decline, and about 110km 2 of seagrass beds in the world are degraded every year, and nearly 1/3 of the grass beds have disappeared according to current statistics.In this paper, the main restoration technologies of seagrass beds, including habitat method, seed method and transplantation method, are summarized, and the advantages and disadvantages of various methods are compared, in order to provide some reference suggestions for seagrass restoration.