くじゆう火山の成層草原土壌および崩積森林土壌の花粉分析
COMPARATIVE POLLEN ANALYSES OF A STRATIFIED GRASSLAND SOIL AND A COLLUVIAL FOREST SOIL FROM THE KUZYU-VOLCANOES, MIDDLE KYUSYU, JAPAN

Masanori ARAKANE
1972 Nihon Seitai Gakkaishi  
The poilen 且ora is infiuenced by the present vegetation down to the limit of 10 cm from the surface iR s三 te I , alld 15L25 cm in site II , which are indicated by the presence of Cr γ ptomeria 三 ntroduced to this volcanic reg 三 〇 ロ by 皿 a ロ , The deposition of volcanic ash has made the habitat drier and exe 辻 ed an infiuence on 廿 le historical development of the plant − communities . 1[ 1ie vegeta 廿 on was anihilated at least twice in the past . 工 n site 工 ( grassland ) no progressive stage
more » ... ogressive stage deeper than the present one has been recognized . In site II ( co11uvial forest soil ) The Ulmion h 甲 changed to the present oak fofest d 曲 ydrated by the ash deposits. When the po 皿en spectra of the volcanic ash sois in the Kuzyil −・ volcanoes and the glacial depositS in Europe axe compared , which have occurred probablly conte 皿 pora 旦 eously , agood analogy is susceptible , and one can co 皿 clude that in Kuzy 負 the Ulmion has mudh dec血 ed against the prospec 廿 ng Pinion ・
doi:10.18960/seitai.22.5_205 fatcat:grhkjxz4sbbojppknm2eqap2oe