Abstract: Seagrass is a kind of monocotyledonous plants growing in shallow coastal area and playing an important role in maintaining offshore ecological balance. It has been proved that heavy metals can impose various effects on seagrass. This paper summarized the research advances about the impacts of heavy metals on seagrass from the aspects of (1) accumulation characteristics of heavy metals in se
agrass and related affecting factors, (2) impacts of heavy metals on physiological and ecological characteristics, especially photosynthetic efficiency of seagrass, and (3) physiological and biochemical adaption mechanisms of seagrass under heavy metals contamination. Further research directions were suggested, including (1) differences in heavy metals absorption capacity of seagrass leaf and root, (2) synergistic and antagonistic effects of various heavy metals, (3) acute and chronic toxicity of various heavy metals, and (4) toxicity mechanisms of heavy metals on seagrass.

Key words: Abamectin, Soil, Microbial degradation, Dominant bacteria, Crude enzyme