Abstract: The interactions between seagrasses and herbivores are important factors influencing the structure and function of seagrass ecosystem. This paper reviewed the research advance of plantherbivore interactions in seagrass bed, focusing on the following several aspects: 1) the defense of seagrass to herbivores: resistance and tolerance; 2) the adaptation of herbivores to seagrass’s defense, such as compensation feeding; and 3) the positive interactions between seagrass and herbivores including: herbivores could regulate and control seagrass community composition, structure and the epiphytes growing on seagrass leaves, and increase seagrass’s tolerance to eutrophication; the seagrass bed could also provide shelters for herbivores. Some important aspects for further study on the seagrassherbivore relationship were suggested: the effects of nutritional quality and chemical defenses on the consumption patterns of diverse types of herbivores; the effects of herbivores on plant chemistry, morphology, reproductive biology and species composition, and the effects of both direct and indirect interactions among plants and herbivores. Strengthening the research on the seagrassherbivore interactions in seagrass bed will benefit us to further understand the seagrass ecosystem, which, therefore, could provide better ecosystem services.

Key words: nitrogen, Coffea arabica, rewatering, yield, water and nitrogen productivity, drought stress, regression analysis.