Comparative analysis on seagrass biomass and coverage before
and after the tsunami revealed that the seagrass bed in K3 was
more severely affected by the tsunami than the seagrass bed in K2
(Nakaoka et al., 2007). Changes in sediment composition were also
different between K2 and K3 and between nonvegetated and seagrass-
vegetated areas of K2. The difference between sites may be
due to the different types of disturbance caused by the tsunami. At
K3, the bed was buried more than 50 cm, whereas at K2, the bed
was only partly eroded (Nakaoka et al., 2007). More importantly,
the presence of seagrasses may buffer changes in sediment
composition at K2 because no significant temporal variation was
found in the median diameter of the seagrass-vegetated site.
Comparative analysis on seagrass biomass and coverage beforeand after the tsunami revealed that the seagrass bed in K3 wasmore severely affected by the tsunami than the seagrass bed in K2(Nakaoka et al., 2007). Changes in sediment composition were alsodifferent between K2 and K3 and between nonvegetated and seagrass-vegetated areas of K2. The difference between sites may bedue to the different types of disturbance caused by the tsunami. AtK3, the bed was buried more than 50 cm, whereas at K2, the bedwas only partly eroded (Nakaoka et al., 2007). More importantly,the presence of seagrasses may buffer changes in sedimentcomposition at K2 because no significant temporal variation wasfound in the median diameter of the seagrass-vegetated site.
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