We investigated the pH dependence of the elongation of and photosynthesis by Sphagnum squarrosum and S. girgensohnii in a coastal Picea glehnii peat mire in Cape Ochiishi, north-eastern Japan. S. squarrosum grew in the acidic centre of the P. glehnii forest and showed the highest photosynthetic rate at pH = 3.8. S. girgensohnii grew at the margin of the P. glehnii forest and showed the maximum photosynthetic rate at pH = 7.2. Both species showed maximum growth at pH = 3.8. S. squarrosum elongated even at pH = 8.8, whereas S. girgensohnii stopped elongation at pH = 7.2. Although the pH dependence of photosynthesis by the Sphagnum species corresponded well to their distribution along the pH gradient from the centre to the margin of the P. glehnii forest, their short-term photosynthetic activity did not predict their long-term growth.
This is a preview of subscription content,to check access.
Access this article
Andrus RE, Wagner DJ and Titus JE (1983) Vertical zonation of Sphagnum mosses along hummock-hollow gradients. Can J Bot 61: 3128-3139
Clymo RS and Hayward PM (1982) The ecology of Sphagnum. In: Smith AJE (ed.), Bryophyte Ecology. (pp. 229-289) Chapman and Hall, London, England
Giller KE and Wheeler BD (1988) Acidification and succession in a flood-plain mire in the Norfolk Broadland, U.K. J Ecol 76: 849-866
Harley PC, Tenhunen JD, Murray KJ and Beyers J (1989) Irradiance and temperature effects on photosynthesis of tussock tundra Sphagnum mosses from the foothills of the Philip Smith Mountains, Alaska. Oecologia 79: 251-259
Hayward PM and Clymo RS (1983) The growth of Sphagnum: experiments on, and simulation of, some effects of light flux and water-table depth. J Ecol 71: 845-863
Jeglum JK and He F (1995) Pattern and vegetation-environment relationships in a boreal forested wetland in northeastern Ontario. Can J Bot 73: 629-637
Maberly SC and Spence DHN (1983) Photosynthetic inorganic carbon use by freshwater plants. J Ecol 71: 705-724
Vitt DH and Chee W-L (1990) The relationships of vegetation to surface water chemistry and peat chemistry in fens of Alberta, Canada. Vegetatio 89: 87-106
Wallén B, Falkengren-Grerup U and Malmer N (1988) Biomass, productivity and relative rate of photosynthesis of Sphagnum at different water levels on a South Swedish peat bog. Holarctic Ecology 11: 70-76
Wilson KA and Fitter AH (1984) The role of phosphorus in vegetational differentiation in a small valley mire. J Ecol 72: 463-473
About this article
Cite this article
Haraguchi, A., Hasegawa, T., Iyobe, T. et al. The pH dependence of photosynthesis and elongation of Sphagnum squarrosum and S. girgensohnii in the Picea glehnii mire forest in Cape Ochiishi, north-eastern Japan. Aquatic Ecology 37, 101–104 (2003). https://doi.org/10.1023/A:1022130622499