摘要
借鉴地质趋势面和生态响应面的方法,考虑到中国北方特殊的气候与植被状况,进行了表土花粉丰度与气候参数(年均降水量和7月均温)之间的非线性函数方程即花粉-气候响应面模型的研究。并从实际出发,选择了分布较广、生态指示意义较大的松属(Pinus)、桦木属(Betula)、栎属(Quercus)和云杉属(Picea)等木本植物,依数据变换方式的不同,共采用了22种建模方案来建造它们的花粉-气候响应面模型。通过对模型方程进行质量检验,选择质量最优的建模方案建模,结果表明模型对数据拟合较好,可用于中国北方定量重建古环境的研究工作中。
The pollen-climatic response surface is one of non-linear function describing the way in which the abundance of taxa is dependent on the joint effects of two or more climatic variables. The non-linear relationship between the pollen percentage of four selected taxa, Pinus, Picea, Betula and Quercus with the mean July temperature and annual precipitation of the sites was produced based on 215 surface samples of which the interval between the sites was more than 3 km. The better function equation was chosen from 22 schemes that was made by transforming data so as to be applied in environmental reconstruction.
基金
国家自然科学基金资助项目
关键词
花粉
气候响应面模型
表土花粉
古气候学
Non-linear function, Pollen-climatic response surface, Surface pollen
