anchlLnai .1加 raki ,305 LaboratOt ッ げ Forest M 硼 age 〃昭 〃 , 勲 c 〃妙 げ Agr' culture 、 0 たayanTa σπか θ73" y, Oka アama 700 Synopsis The ro 匚 es of the disturbance regirnc in the dynarnics and stability of forest comrnunities are reviewed , and various types of mosaic structure are dassified acoording to this factoL A com ・ mun 呈 ty shows a mosaic structure 洫 clud 血 g mature phases when the rotation period of disturb − an exceeds both the retum interval and the maturation time of tho community . The

more »

... relatlve length of the former two factors in comparison to the maturation t三 me can be a m 鱒 or criter − ion of ◎ommunity stability , whi1e 伽 ctuation of b圭 omass , as an illdcx of stability, depends on the rate of disturbance relative to that of recovery . As a case study , the infiucnce of the disturba ロ ce regime on the stabn 三 ty of cool −temperate d iduous forest comrnunities in Japan is overviewed . The loss caused by a large typhoon may exceed the annual incremcnt of forest biomass ten − ・ fold or more , Further problems in the study of d重 st ロ rbance a皿 d forest regeneration are discuss − ed , with special emphasis given to the necessity for continuous study over a large area .