Soil Water Movement of a Mangrove Forest in Halmahera Island, East Indonesia.

概要

論文の詳細を見る
Soil water movement, salinity and redox potential of soil water and soil pH were studied in a well developed mangrove forest in Halmahera Is., East Indonesia. The study area was classified into four zones of dominant species, the Sonneratia alba (S), Hibiscus tiliaceus (H), the mixed stand of Rhizophora apiculata and Bruguiera gymnorrhiza (Ra-B), and Rhizophora stylosa, Nypa fruticans and Xylocarpus granatum (Rs-N) zones. The S zone was inundated by neap high tide. The Ra-B and Rs-N zones were inundated only the occasion of spring high tide. The H zone was not inundated. The soil water table was raised to ground surface when flooded. The level of water table was kept close to ground surface on the day of flood, but it was lowered down during the period of no flood. At the end of the period of no flood, the soil water level in the Rs-N zone was lowered to 70 cm below ground surface, while that in the Ra-B zone to 30 cm. Highly reductive condition appeared at 20 cm depth in the S and Ra-B zones. In the Rs-N zone, the condition was oxidative to slightly reductive even at 70 cm depth to some extent.When the soil was desiccated, acidity of the soil increased in the reductive soil of S and RaB zones. In the Rs-N zone, high acidity was observed only in deeper layer.
日本熱帯生態学会の論文