摘要
根据表土花粉分析和植被样方调查 ,燕山地区各植被带的表土孢粉组合在总体面貌上代表了植被组成 ,但孢粉组合不等于植被组成 ,而影响其差异的原因是孢粉保存、孢粉产量、外来孢粉和孢粉鉴定。表土花粉的代表性因种属不同而差异颇大 ,乔木植物花粉中松 (Pinus)、桦 (Betula)、胡桃 (Juglans)和栗 (Castanea)具超代表性 ,而栎(Quercus)、鹅尔枥 (Carpinus)和杨 (Populus)具低代表性 ;灌木植物花粉中花椒属 (Zanthoxylum)具超代表性 ,蔷薇科和榛 (Corylus)多具低代表性 ;草本植物花粉中蒿 (Artemisia)、藜科、香蒲 (Typha)、唇形科、蓼科、毛茛科、伞形科和唐松草 (Thalictrum)具超代表性 ,禾本科、虎耳草科、草 (Humulus)、莎草科、豆科、石竹科和旋花科等具低代表性。同一花粉在不同的植被带中其R值也有一定的差异 ,一般地说在远离主要花粉源的植被带中 ,该花粉的R值偏低 。
This study explored the quantitative relationship between pollen in the surface soil and vegetation in the Yanshan area. Data were collected from the region between about 39°00′-40°50′ N and between 117°10′-119°50′ E from 2 082 m elevation in the Yanshan Mountains to 0 m at the seashore of the Bohai Sea. The samples of pollen in the surface soil were collected from 53 locations at about 100 m elevational intervals in Yanshan Mountainous area and at about 20 km level intervals in the plain between Yanshan mountain and Bohai Sea seashore. At the same time of pollen sampling in the surface soil, investigation of the vegetation was also done. Then, R value (representation of pollen) was calculated with pollen percentage and vegetation investigation. According to sampling of pollen in surface soil and vegetation investigation, the relationship between soil surface pollen and modern vegetation was quantitatively analyzed. Results showed that the surface pollen assemblages of all vegetation zones in Yanshan area basically represent vegetation composition, but the pollen assemblages are not equal to the vegetation composition. This is due to the influences of pollen preservation, pollen production, foreign pollen and pollen identification. The representation of pollen in surface soil is very different in families and genera. The tree pollens such as Pinus, Betula, Juglans and Castanea are over_represented, but Quercus, Carpinus and Populus are under_represented; the shrub pollen such as Zanthoxylum is over_represented, Rosaceae and Corylus are under_represented; the herb pollens such as Artemisia, Chenopodiaceae, Typha, Labiatae, Polygonaceae, Ranunculaceae, Umbelliferae and Thalictrum are over_represented, while others such as Gramineae, Saxifragaceae, Humulus, Cyperaceae, Leguminosae, Caryophyllaceae and Convolvulaceae are under_represented. The same pollen in different vegetation zones has different R value. Generally, R value of the pollen in the vegetation zones far away from the main pollen sources is lower than that in the places of main pollen sources. The change of R value is also influenced by pollen preservation, pollen production, and foreign pollen.
出处
《植物生态学报》
CAS
CSCD
北大核心
2003年第6期804-809,共6页
Chinese Journal of Plant Ecology
基金
国家自然科学基金重点项目 ( 90 10 2 0 0 9)
国家自然科学基金项目 ( 4 0 1710 95 )
河北省自然科学基金项目 ( 4 0 2 615 )
国家博士后基金 ( 2 0 0 3 0 3 3 2 5 3 )
