Why is it possible for a low − level peatland plants community, Menyanthes trifoliata − Phragmites australis community, to establish itself on a high − level peatland, Ozegahara mire : Effects of microtopography and peat deposition on the growth and distribution of marsh plants communities

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Other Title
  • 高位泥炭地の尾瀬ヶ原になぜ低位泥炭地のヨシ−ミツガシワ群落が成立できるのか : 微地形・泥炭堆積過程が湿原植物群落の生育，分布に及ぼす影響
  • 高位泥炭地の尾瀬ヶ原になぜ低位泥炭地のヨシ-ミツガシワ群落が成立できるのか : 微地形・泥炭堆積過程が湿原植物群落の生育,分布に及ぼす影響
  • コウイ デイタンチ ノ オゼガハラ ニ ナゼ テイイ デイタンチ ノ ヨシ-ミツガシワ グンラク ガ セイリツ デキル ノ カ : ビチケイ ・ デイタン タイセキ カテイ ガ シツゲン ショクブツ グンラク ノ セイイク,ブンプ ニ オヨボス エイキョウ

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Abstract

We investigated the microtopography of Ozegahara mire and the environment in which bog plants grow there. Peat was collected by a peat sampler from representative microtopography and the peat deposition process was compared. In Ozegahara mire, Menyanthes trifoliata community, Caltha palustris var. nipponica community and Phragmites australis − Menyanthes trifoliata community, which are indicators of low − level peatlands, grow in shallow pond pools and on the floodplains of rivers flowing in from the mountains. This site was an environment with low peat deposition conditions over intermediate and high peat layers. The thickness of the peat layer was relatively shallow in the patterned fen of Minami-shimotashiro, reaching the clay layer at around 300 cm in depth. At Nakatashiro, the peat layer was not disturbed and did not reach the clay layer even after reaching 600 cm in depth, while the peat layer reached the clay layer after about 500 cm in depth, and the peat and clay layers were interlayered at deeper levels. These results indicate that bog plants do not necessarily depend on the peat layer for their growth, but depend on the growth environment established by changes in the microtopography after peat deposition. The microtopography of Ozegahara mire is likely to have been formed at the same time at each site, and the main factor of peat formation depends on the blanket bog type.

Journal

  • 低温科学

    低温科学 80 251-267, 2022-03-31

    低温科学第80巻編集委員会

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