アカモク群落内に設置した実験基質上の海藻植生

概要

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To understand the establishment process of Sargassum horneri stands, seasonal colonization and coverage of seaweeds on experimental substrata set in a S. horneri community were researched for about three years. The substrata(concrete plates : 50 × 50 × 5cm) were designed to have a similar height with that of natural substrata of S. horneri and set every two months from June 1998 to April 1999. During the experiment, total 42 seaweed species appeared on the substrata and six species among those became dominant(>25% coverage on any of the substrata). Ulva pertusa, Laurencia sp., Padina arborescens, Sargassum fusiforme and S. thunbergii became dominant mainly in the first year on different substrata set in different seasons, but their dominance was seasonal and temporary. In the second year, a number of young S. horneri plants succeeded to colonize and became the only dominant species forming mono-specific stands on all the substrata. Mass colonization and dominance of S. horneri also occurred in the third year. In this report, specific conditions of the habitat leading to the sustainable dominance of S. horneri were discussed, especially referring to the characteristics of the substrata.
日本水産工学会の論文
2006-02-20