【摘要】 在福寿螺[Pomacea canaliculata (Lamarck,1819)]分布地区调查的基础上,将亚洲地区福寿螺北缘地区分为“长江上游”(云南、四川、重庆)、“长江中游”(湖北)、“长江下游”(安徽、江苏、上海)及“韩国-日本”4个样本,获取每个样本内的年平均气温、1月平均气温、1月平均日最高气温及1月平均日最低气温数据。将福寿螺在原产地南美洲地区最南端分布地区的相应气温因子值(7月对应北半球的1月),假设为福寿螺对这些气温因子适应范围的临界低温理论值。分别比较亚洲福寿螺北缘分布地区样本气温因子平均值与假设临界低温理论值间的差异显著性,以及4个样本间的气温因子差异显著性。结果表明,福寿螺传播到其原产地之外的地区后,能适应比原产地更为恶劣的温度环境;不论与福寿螺原产地比较,还是福寿螺不同北缘分布地区间比较,结果均表明,在我国福寿螺当前北缘分布地区基础上,仍具备继续北移的空间。更多还原

【Abstract】 Based on the regional survey of apple snail [Pomacea canaliculata(Lamarck, 1819)], the northernmost distribution areas of apple snail invasion areas in Asia was divided into four samples, i.e. "upper Yangtze River"(Yunnan,Sichuan, Chongqing), "middle Yangtze River"(Hubei), "lower Yangtze River"(Anhui, Jiangsu, Shanghai) and "Korea-Japan". Data of annual average temperature, January average temperature, January average daily maximum temperature and January average daily minimum temperature of the four samples were obtained. The corresponding temperature factor values of the southernmost distribution area of apple snail origin area in South America(July corresponding to January in the Northern Hemisphere) were assumed to be the adaptive theoretical value of critical low-temperature(TVCLT). The differences between the mean value of temperature factor of the samples and the TVCLT were compared, and the differences among the four samples were also compared. The results showed that when apple snail was spread to areas outside its original area, it could adapt to the worse temperature environment than the original area, and there was still room to move northward on the basis of the current northern distribution areas of apple snail in China.更多还原