An ecological study on costal pine forest

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  • 海岸松林の生態学的研究
  • カイガン マツバヤシ ノ セイタイガクテキ ケンキュウ

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Abstract

1) The pine forest established on coastal sandy areas at Hamayoshida, Miyagi Pref. were investigated from the ecological standpoint.<br>2) Within the forest investigated eight communities were found occurring in zonation towards the interior. Pinus Thunbergii (“Kuromatsu”) communities with strand plants as undergrowths were found on the seaward parts, while P. densiflora (“Akamatsu”) communities with many inland plants on the interior parts. The zonal arrangement of the communities was accompanied by the zonal change of such properties of the soil as moisture, pH, Ca-and Cl-content etc. The maritime character of which weakened inwards. Accordingly, it may be said that these soil properties, as well as meteorological characters, control the structure of communities.<br>3) Some precise examples of water levels influencing greatly upon the structure of pine forests will be given as follows :<br>When the water level is higher than 25-35cm in summer, the pines are unable to grow, and when lower than 50cm, the normal types of forests appear. On the intermediate site occurred the forests with such hygrophytic undergrowths as sedges.<br>The inhibiting effect of underground water upon the establishment of pine forests seems to be accelerated by the increasing content of chlorids.

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