摘要
Seagrasses are marine plants that form economically and ecologically important ecosystems in coastal seas around the world.Unlike seaweeds,another group of marine flora,seagrasses are flowering and seed-bearing plants.Globally,there are only 72 known species of seagrasses,distributed over six bioregions,spanning from the Temperate North Atlantic to the Temperate Southern Ocean[1].This contrasts with 295,383 species of terrestrial flowering plants[2]and 225,000 species of seaweeds known to science[3].