1995 Fiscal Year Final Research Report Summary

Water chemistry and conservation of Sphagnum bog

Research Project

Project/Area Number	05454613
Research Category	Grant-in-Aid for General Scientific Research (B)
Allocation Type	Single-year Grants
Research Field	環境保全
Research Institution	KYOTO UNIVERSITY
Principal Investigator	TABATA Hideo Kyoto Univ., Center for Ecol.Res., Associate Prof., 生態学研究センター, 助教授 (20025373)
Co-Investigator(Kenkyū-buntansha)	SHIBASAKA Mineo Okayama Univ., Res.Inst.Bioresour., Instructor, 資源生物科学研究所, 助手 (60226165) FUJITA Noboru Kyoto Univ., Center for Ecol.Res., Instructor, 生態学研究センター, 助手 (50093307) TANAKA Ayumi Kyoto Univ., Faculty of Science, Lecturer, 理学部, 講師 (10197402)
Project Period (FY)	1993 – 1995
Keywords	Sphagnum bog / Water chemistry / pH / Electric conductivity / Phosphate / Precipitation / Oligotrophy / Eutrophication
Research Abstract	Sphagnum cuspidatum, acarpet species in pools, and S.palustre, a hummock-building species, in a bog on a floating peat mat in Mizorogaike Pond, Kyoto were cultured in artificial buffer solution and natural mire water to investigate relations between Sphagnum growth and water chemistry. The tow Sphagnum species were dead at high pH more than 5.9 in 10 mM Tris-MES buffer. In the case of natural water culture, Sphagnum could survive even at pH 6 under conditions of low electric conductivity less than 50 muS/cm, 25 C.Sphagnum has ability to release protons and could make acid around it under conditions of low electric conductivity because of its low buffer capacity Sphagnum was susceptible to phosphate in addition to high pH.In Mizorogaike pond, precipitation itself and waters flowing to the pond after precipitation from the catchment area where natural vegetation was preserved were oligotrophic enough for healthy growth of Sphagnum. On the other hand, waters incoming from the urban-developed catchment area where buildings and roads were constructed were injurious to Sphagnum as the result of eutrophication of rain in the catchment area. It is firstly important for the conservation of Sphagnum bogs to keep natural vegetation in all catchment areas. When catchment area has already developed, the inflow of polluted waters into Sphagnum bog must be stopped. It is also prohibited to introduce river water and ground water to Sphagnum bogs.