茂原八積低層湿原における生態学的研究 : 植生の分布を規制する物理的, 化学的要因

概要

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The ecosystem in the Mobara-Yatsumi marsh was found to be mainly controlled by the following factors : mean water level, fluctuation of water level, thickness of muck layers and DO of surface water. Of these, mean water level was effective independently, while fluctuation of water level, thickness of muck layers and DO were closely correlated with each other. Among the correlated factors, the most rudimentary factor appeared to be the fluctuation of water level. The successional process was estimated from the relationship between environmental factors and vegetation types. In the process of succession, two types were supposed, i.e., the reed swamp→grassy meadow→grass-forb meadow→alder thicket type, and the reed swamp→tussock meadow→alder thicket type. The former occurred conditions of large fluctuation of water level and underdevelopment of muck layers, but the latter occurred in areas where small fluctuation of water level and thick mucks were observed. The oxidation-reduction potential of soil in the tussock meadow was lower than that in the grassy meadow and the grass-forb meadow. In the process of succession, the tussock meadow maintained the stable phase due to the anaerobic condition of the soil.
日本生態学会の論文
1984-06-30