1. The author investigated on the flora of Yongzong island especially on the point of view of the sociological studies.
2. The author could distinguish kinds of the plant formation in this island (1). Seaside plant formation (2). Mountain plant foruation.
3. The seaside plant formation could be subdivided as follows:
(1) Association of Triglochin maritimum L_INNE.
(2). Association of Suaeda japonica M_AKINO.
(3). Association of Scirpus triquetr L_INNE.
(4). Association of Phragmites prosturatus M_AKINO.
(5). Association of Zoysia japonica S_TEUDEL.
(6). Association of Zoysia sinica H_ANCE var. tenuis N_AKAI ex Y_AMAMOTO.
(7). Association Of Carex pumila T_HUBERG.
(8). Association of Rosa rugosa T_HUNBERG.
(9). Association of Pinus Thunbergii P_ARLTOR.
(1), (2), (3), (4), (5) associations can grow under the high tide, so when the high tide comes they soaked in the sea water.
4. The mountain plant formation can be subdivided as follows:
(1). Association of Quercus aliena B_LUME and Platycarya strobilacea S_IEBOLD & Z_UCCARINI.
(2). Association of Quercus acutissima C_ARRUTHERS and Platycarya strobilacea S_IEBOLD & Z_UCCARINI.
(3). Association of Robinia Pseudoeacia L_INNE and Platycarya strobilacea S_IEBOLD & Z_UCCARINI.
5. The plants at the abandoned mine regions are replacing by the association of Robonia Pseudacaci L_INNE and Platucarya strobilacea S_IEBOLD & Z_UCCARINI.
6. Generally I can find that soil which is developed by the seaside plant formation under sea water (when high tide comes, they soaked in the sea water) is over the pH 8.0, so it shows strong alkaline.
But the sandy soil behind the tide line shows near the neutral in spite of the same seaside plant formation.
In the case of mountain plant formation the soil where they drveloped show near the pH 6.0, so it is acidity.
|