血吸虫病疫情与地理环境因子的多元相关分析——基于南昌县行政村的实证研究

SPATIAL AND TEMPORAL PATTERNS OF FISH ASSEMBLAGES IN THE RIVERS OF CHAOHU BASIN

探索鄱阳湖血吸虫病典型疫区的社会、经济、环境因子与血吸虫病疫情的相互关系及其相关程度。采用经典统计学中单相关、偏相关和复相关系数研究南昌县43个行政村血吸虫病感染人数与疫水接触指数、耕牛存栏数、行政村水域面积、行政村湖边边界长度和行政村到鄱阳湖边界的距离的内在联系和相互关系。所选5个因子与感染人数的简单相关系数都达到了0.05置信水平,固定疫水分布各因子计算疫水接触各因子与＂感染人数＂的偏相关系数,与固定疫水接触各因子计算疫水分布各因子与＂感染人数＂的偏相关系数,都小于简单相关系数,说明疫水分布因子与疫水接触因子具有内在关联;＂感染人数＂与所有5个因子的复相关系数为0.948,达到了0.005的极显著置信水平。所选的村级宏观因子都与血吸虫病疫情显著相关。

Based on the data collected from 66 sampling sites within the rivers of the Chaohu basin during April and October, 2013, the spatio-temporal variations in fish assemblages were examined in this study. Our results showed that fish species diversity did not vary among rivers and ecoregions but differed significantly across seasons and stream orders. Fish abundance collected in October was more than that in April. The highest species richness and fish abundance were observed in the second-order streams, significantly higher than that in the first-, third- and fourth-order streams. Fish assemblage structures showed significant difference across seasons and ecoregions, respectively, but did not differ significantly among rivers and stream orders. When looking at the sub-ecoregion scale, significant difference in fish assemblage structures was only observed between the West-southern Forest Sub-ecoregion and the other five sub- ecoregions, while that among the other five sub-ecoregions showed no significant variation. Zacco platypus and Ctenogobius spp. were more abundant and frequent in the West-southern Forest Sub-ecoregion, while Carassius auratus, Hemiculter leucisculus and Cyprinus carpio were more abundant and frequent in other sub-ecoregions.