DAY-NIGHT REVERSION IN THE HORIZONTAL DISTRIBUTIONS OF DISSOLVED OXYGEN CONTENT AND PH IN A SARGASSUM FOREST
DAY-NIGHT REVERSION IN THE HORIZONTAL DISTRIBUTIONS OF DISSOLVED OXYGEN CONTENT AND PH IN A SARGASSUM FOREST
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DOI：
10.1007/bf02108884
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发表时间：
1989-01-01
期刊：
影响因子：
--
通讯作者：
KOMATSU T
中科院分区：
文献类型：
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作者：
KOMATSU T
本文研究了若狭湾侧的一个小海湾中海藻林对光照度、溶解氧含量和pH值分布的影响。1982年6月在海藻生长旺盛的季节和1982年8月在海藻生长缓慢的季节，观测了光照度、溶解氧含量、水密度和pH的空间分布。对溶解氧含量、水密度和pH值进行了昼夜观测。在海藻生长旺盛的季节，当太阳位于天空最高点时，海藻林内的海面照度值下降到不足40%。密度分层发生在每一个观察。溶解氧含量和pH值的空间分布格局相似。其水平分布从白天到夜间呈相反的变化趋势，表现为两种类型：（1）白天海岸高值，上层近海高值;（2）夜间海岸低值，海岸高值。中午光照度、夜间溶解氧含量和pH值的分布规律与海藻林藻类密度的垂直分布规律一致。溶解氧在白天各观测点均处于过饱和状态，而在夜间，分别在6月和8月的林下部分和沿着底部溶解氧处于欠饱和状态。这些空间分布带来的过程进行了讨论。
This paper examines the influence of a Sargassum forest on distributions of illuminance, dissolved oxygen content and pH in a small cove facing Wakasa Bay. Spatial distributions of illuminance, dissolved oxygen content, water density and pH were observed for June 1982 during the season of luxuriant seaweed growth, and for August 1982 during the season of little growth. Observations of dissoved oxygen content, water density and pH were made during the day and at night. The values of illuminance at the sea surface were decreased to less than 40% inside the Sargassum forest when the sun was highest in the sky during the season of luxuriant growth. Density stratification occurred during every observation. Disolved oxygen content and pH showed similar patterns of spatial distribution. Their horizontal distributions reversed from day to night, and consisted of two types: (1) higher values inshore and higher values offshore in the upper layer during the day with (2) lower values inshore and higher values shore at night. Distributions of illuminance about noon, and dissolved oxygen content and pH at night showed patterns corresponding to the vertical distribution of algal density of the Sargassum forest. Dissolved oxygen was supersaturated at every observation point during the daytime, but at night it was undersaturated in the lower part of the forest or along the bottom in June and August, respectively. Processes that brought about these spatial distributions are discussed.