潮間帯の海藻植生における極相とその査定

概要

論文の詳細を見る
A recently proposed criterion for determining climax in intertidal algal vegetation is confirmed by the comparison of an additional 25 adequately old algal vegetations which are considered as being at the climax stage. As a modification of the previous conclusion that more than 3-4 years were required, now it appears that 7 years are sufficient to attain the climax stage. Climax vegetation bearing one of the annuals, viz. Ulva pertusa, as a dominant, is common in the southern Hokkaido area, especially in sheltered conditions such as where protected by breakwaters. Thus, it appears the current concept of a climax vegetation as "one in which perennials dominate" should be transformed into "vegetation in which certain algae, having the ability to contimuously occupy the habitat, dominate". Frequent reproduction of Ulva pertusa in the temperate areas in Japan and of some species of the Cyanophyceae in tropical and subtropical areas, is considered to support their position as dominants in such climax vegetations. Finally, stability in intertidal climax vegetation is discussed and it is suggested that there is some ability to reduce algal invasion not only from within the same belt-like vegetation but from the belt above as well.
日本生態学会の論文
1977-03-31