Ref ID : 3238
Hada Yoshine; [Studies on Bog Lakes II. Floating Islet Formation from the False Bottom]. Jap.J.Limnol. 7(2):64-67, 1937
Reprint
In File
Notes
The writer observed that floating islets were derived from parts of the false bottom in one of many bog lakes in the Sphagnum-swamp of Kritappu on the eastern Pacific coast of Hokkaido. In the bog lake, in which floating islets were found, are observed several water plants whose stems are creeping over the false bottom, that is, thence, usually suspended independently in water 30-50 cm in depth, while the true bottom is 1.0-1.5 m in depth. The false bottom of this bog lake is well developed and becomes firm. On account of the action of decomposition gases accumulated under the false bottom, parts of it are risen to the water surface as floating islets. The colour of the false bottom is dark brown, but floating islets have the black surface, on which a few plants sometimes grow. The influence of the false bottom upon the water temperature was not observed at the time of the research made in December, 1936.