中国蜱类不同宿主类型的主成份分析和聚类分析

Principal Component and Cluster Analysis for Different Host Types of Chinese Ticks

中国分布的蜱类宿主涉及爬行纲、鸟纲、哺乳纲等3纲20目,约130余种。主成份分析结果表明,9个主成份的累积贡献率仅达到70%以上,进一步的因子载荷分析发现只有极少数蜱类具有宿主特异性;聚类分析结果与其大致相同。因此,中国多数蜱类无明显的宿主特异性,宿主的生态特异性决定了蜱类的分布和宿主范围。

About 130 species of the tick hosts were classified into 20 orders from 3 classes, Reptilia, Aves and Mammalia in China. The result of principal component analysis showed that the accumulated contribution ratio of the first 9 principal components was only a bit more than 70%. Furthermore, the factor loadings analysis suggested that only very few species of ticks had host specificity, which was also confirmed by the clustering analysis. Thus, most of ticks in China do not show significant host specificity. The distribution and hosts of ticks are decided by ecological specificity of tick host.