遷移からみた埋土種子集団の解析II : とくに二次遷移初期のブタクサ群落について

概要

論文の詳細を見る
As a pioneer stage in the secondary succession the Ambrosia elatior community (Figs. 1,2) is widely distributed in the Kanto District extending up to 1400m above the sea level. The most common main course of the early succession is the Ambrosia→Erigeron→Miscanthus→Pinus→Machilus-, Shiia-stages. The vegetation and the buried-seed population in the soil at the Ambrosia stage in the campus of the Chiba University were studied (Figs. 3,4). The buried-seeds were separated from the soil and litter by the method of using the K_2CO_3 solution as in the previous paper (NUMATA et al. 1964). The floristic composition of the Ambrosia stage is shown in Table 1 where the density/m^2 of Ambrosia is 156 and it is stratified with three modes as the height varies (Fig. 5). Digitaria and Setaria are distributed randomly like Ambrosia, but they are low in height (10〜16cm) under the stratified structure organized by the dominant Ambrosia. The floristic composition of the buried-seed populations in June and December is shown in Table 2. It is noticeable that the composition and the quantities of species in each month are not similar and there is a definite relation satisfying the law of geometrical progression between the number of seed-grains and the rank of species (Fig. 6). Here we discuss the buried-seed population under the concepts of GSP and SSP. The total number of buried-seeds at a time is called the"gross buried-seed population"(GSP) and the total number of seeds produced in one growing season of a seral stage, for instance the Ambrosia stage, is the"seral seed production" (SSP). A phenomenal SSP of the Ambrosia stage is about 16,500/1m^2×1cm soil.
日本生態学会の論文
1964-12-01

遷移からみた埋土種子集団の解析II : とくに二次遷移初期のブタクサ群落について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク