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采用花粉百分含量分析和主成分分析方法对内蒙古中部表土花粉与植被的关系进行了对比研究 ,探讨了草原花粉组合的特点及其形成原因。研究发现 ,草原区表土花粉以藜科和蒿属 ( Artemisia)为主 ,并以前者占优势地位 ,麻黄属 ( Ephedra)亦较常见。草原区植被的 A/C(蒿属 /藜科 )值较干旱区草原植被为低 ,分布规律也较干旱区复杂 ,但仍能反应干旱程度的差别 ,而且还反映了草原植被的退化程度。松属 ( Pinus)和桦属 ( Betula)的花粉在个别样品中占有较大比例 ,是环境噪音 (指外源性的、超代表性的花粉 )的主要来源。不同植被类型在花粉组合上各有特点 ,可以从花粉百分含量的数量特征上进行区分。在研究中还发现草原区的严重退化在花粉组合上具有明显表现
Pollen content analysis and principal component analysis were used to study the relationship between surface pollen and vegetation in central Inner Mongolia, and the characteristics of pollen assemblages in the grassland and the reasons for their formation were discussed. The study found that the surface pollen in the grassland area is dominated by Chenopodiaceae and Artemisia, and the former is dominant. Ephedra is also common. The value of A / C (Artemisia / Chenopodiaceae) in grassland area is lower than that in arid area, and its distribution is more complicated than that in arid area. However, it still reflects the difference of drought degree and reflects the degree of degradation of grassland vegetation. Pollen of Pinus and Betula occupy a large proportion of individual samples and are the major source of environmental noise (exogenous, super-representative pollen). Different types of vegetation have their own characteristics in the pollen assemblage, which can be distinguished from the quantitative characteristics of pollen percentage. In the study, it was also found that the serious degradation of grassland area had obvious manifestations in pollen assemblages