Regeneration responses of Phragmites australis(Cav.)Trin. and P. japonica Steud. to above-ground organs loss

Abstract

Phragmites australis(Cav.)Trin. and P. japonica Steud. communities were mowed at different heights in order to examine their regeneration response to above ground organs loss as one of the disturbance in waterfront(mowing at the ground level as high disturbance, mowing at 1/2 heights of plant height as low disturbance). Regardless of high and/or low disturbances, number of regenerated culms was approximately same in both species communities. However, it was indicated that P. australis and P. japonica suffered from more large stress further than low disturbance by high disturbance, because C/F ratio was higher and TNC content in rhizome was lower by high disturbance in both species communities. P. japonica communities, however, regenerated creeping culms vigor ously and seemed to form new-other communities by the culms under high disturbance.