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
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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]
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Authors | | Top |
- Haraguchi, A., correspondent
- Hasegawa, T.
- Iyobe, T.
- Nishijima, H.
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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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