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内蒙古中部表土花粉研究
引用本文:宋长青.内蒙古中部表土花粉研究[J].Acta Botanica Sinica,1996,38(11):902-909.
作者姓名:宋长青
作者单位:中国林业科学院资源信息研究所!北京100091(王琫瑜),青海畜牧兽医学院草原系!西宁810003(宋长青),中国科学院植物研究所!北京100093(孙湘君)
基金项目:国家自然科学基金重大资助项目 !(项目编号 :4 92 91 1 0 0 )
摘    要: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

关 键 词:表土花粉  花粉组合  主成分分析  环境噪音

STUDY ON SURFACE POLLEN IN MIDDLE INNER MONGOLIA, CHINA
Authors:Wang Feng  yu
Abstract:The paper deals with features of pollen assemblages and their relationship to vegetation by comparing the results from surface pollen analysis with that from sample determination. It showed that Chenopodiaceae dominate with some Artemisia and a few Ephedra in steppe area. Although A/C (Artemisia/Chenopodiaceae) value was lower and more complicated than arid steppe area, it could reflect the humidity and the level of grass degeneration. The much more Pinus and Betula pollen percentage might be the main environmental noise source produced as statistical error. There were no obvious difference on pollen assemblage among the steppe types as Stipa gobica, S. krylovii, Peganum Achnatherum except Artemisia and Chenopodiaceae pollen. However, there were some difference among meadow steppe, viz. sparse Ulmus pumila and Salix tree, Aneurolepidium chinense and also the types like Salix flavida, Stipa gobica, S. krylovii, Peganum Achnatherum. Features of pollen assemblage in steppe degeneration and applications of PCA (principal component analysis) and method on surface pollen analysis were discussed.
Keywords:Surface pollen analysis  Pollen assemblage  Principal component analysis  Environmental noise
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