Ecological Review 1996 23: 189-199.

Growth and production of sphagnum mosses from Takadayachi Moor in Hakkoda Mountains Northeast Japan 2. - Growth in length measured with a point level method.

Akira Shiraishi, Yoshio Ino, Atsushi Kume, and Yukira Mochida.

SUMMARY
1) The elongation rate of the shoots of Sphagnum papillosum, S. nemoreum and S. tenellum was measured in 1990 and 1991 on Takadayachi raised bog in northeast Japan.
2) The elongation rate was measured with a point level method. We thought this method would cause very small damage by touching the shoots. The mean rate at 100 points in 9 cm x 9 cm area was measured.
3) The elongation rate in 1991 was 13 - 16 mm per a season in Sphagnum papillosum, 10 - 13 mm in S. nemoreum and 3 - 7 mm in S. tenellum. The elongation rate in 1990 and 1991 differed among three species. The rate of S. papillosum in 1990 was higher than that in 1991 but it was contrary in S. nemoreum.
4) Shoot density was measured with cylinders, 50 mm in height and 50 or 82 mm in diameter.
5) Growth rate of shoots in dry matter was calculated 44 - 104 g m^-2 year^-1 in S. papillosum, 70 - 249 m^-2 year^-1 in S. nemoreum and 141 - 297 g m^-2 year^-1 in S. tenellum populations.