摘要
在神衣架巴山冷杉林中,冷杉花粉数量与其植物盖度接近。在林外,冷杉花粉数量迅速下降,至10km以外则仅有个别出现。用在表土中所取R值对化石花粉组合谱进行了校正。说明现代的巴山冷杉林乃是由栎—桦林演变而来,时间约在300—400BP。
For the porpose of studying the relationship between Abies pollen rain and its plant, surface samples were picked up from inside and outside of the Abies fragesii forest in the Shennonjia Mt., named Dashennongjia. Pollen percentages, R-values and pollen infux were estimated. The results of analysis show that, inside the forest, the quantity of the Abies pollen
is comparable to the density of the plant, while outside the forest, the pollen falls down rapi-dly to 10% at 1 km from the forest, less than 5% at 2 kms and only very few beyond 10 kms.
The dispersal patterns of Abies, Picea and Pinus are disfferent.
Pollen samples for analysis of Abies vegetation history were collected from a soil profile
in the Abies forest. The pollen percentages at each level are corrected by using the R-values,
worked out from the surface samples. And the pollen influx were estimated. The pollen dia-.grams reveals that the Abies forest was developed from Quercus-Betula forest, which was about
300-400 years ago.
出处
《地理学报》
EI
CSSCI
CSCD
北大核心
1991年第2期186-194,共9页
Acta Geographica Sinica
基金
中国科学院自然科学基金资助课题
关键词
冷杉林
花粉
植物
森林
植被
Abies fargesii pollen
R-value
Pollen dispersal
Forest succession
