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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
Haraguchi, A.; Hasegawa, T.; Iyobe, T.; Nishijima, H. (2003). 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. Aquat. Ecol. 37(1): 101-104. https://dx.doi.org/10.1023/A:1022130622499
In: Aquatic Ecology. Springer: Dordrecht; London; Boston. ISSN 1386-2588; e-ISSN 1573-5125, more
Peer reviewed article  

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Keywords
    Disciplines > Chemistry > Soil science > Soil chemistry
    Ecological zonation
    Organic matter > Biogenic deposits > Organic sediments > Peat
    Properties > Chemical properties > P
    Properties > Sediment properties
    Soil chemistry
    Soil chemistry
    INW, Japan [Marine Regions]

Authors  Top 
  • Haraguchi, A., correspondent
  • Hasegawa, T.
  • Iyobe, T.
  • Nishijima, H.

Abstract
    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.

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