MECHANISM OF ORGANIC SOIL SEDIMENTATION AND ITS EFFECT ON THE GROWTH OF SPARGANIUM ERECTUM IN THE LOTIC ENVIRONMENT
2007 Volume 13 Pages 213-218
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2007 Volume 13 Pages 213-218
MIkuri, Sparganium erectum, is an endangered species locally. Characteristics of annual growth pattern was observed in a small stream separately between above- and belowground biomass, and new and old shoots. Succeeding upward and downward material translocation was recognized from between above- and below ground biomass from spring to summer, and at the time of new shoot formation from summer to winter. Sparganium hibernates in submerged form, is transformed into emergent form in spring, then grows rapidly.
Many shoots collapse in June and December, then stuck the current in the community, declining the flow velocity. An amount of organic and inorganic sediments is accumulated in a short time on the bottom, producing nitrogen and phosphorus rich substrate there. Then, 53.9% of nitrogen is taken up by the plant, when growing. Presumably it is one of strategies to develop a community there.
