不同地理种群短额负蝗对环境温度的适应性

【目的】本研究旨在探明短额负蝗Atractomorpha sinensis不同地理种群对环境温度响应的适应性差异。【方法】以大豆叶片为食物饲养，在恒温16, 20, 24, 28和32℃, 相对湿度70%，光周期16L∶8D条件下，系统观测陕西延安、河南郑州、四川成都、云南曲靖和广东广州5个短额负蝗地理种群的生长发育过程，比较不同地理种群各虫态的发育历期、发育速率及发育起点温度和有效积温的差异性，分析种群生物学指标与栖息地环境温度的相关性。【结果】不同种群短额负蝗发育速率均随着温度升高而加快，但在16℃下成都和广州种群不能完成世代发育。随着不同种群栖息地纬度和海拔升高，其

Adaptability of different geographical populations of Atractomorpha sinensis (Orthoptera: Pyrgomorphidae) to environmental temperature

【Aim】 This study aims to ascertain the adaptability of different geographical populations of Atractomorpha sinensis in response to environmental temperature. 【Methods】By using soybean leaves as the food source, we observed the growth and development process of various developmental stages of five geographical populations of A. sinensis from Yan′an, Shaanxi (YA), Zhengzhou, Henan (ZZ), Chengdu, Sichuan (CD), Qujing, Yunnan (QJ) and Guangzhou, Guangdong (GZ) under the conditions of different constant temperatures (16, 20, 24, 28 and 32℃), RH 70% and a photoperiod of 16L∶8D, evaluated the variations in the developmental duration, developmental rates, developmental threshold temperatures and effective accumulated temperatures of different geographical populations, and analyzed the acorrelation between population biological indices and habitat environmental temperature. 【Results】 The developmental rate of different geographical populations of A. sinensis increased with the increase in temperature. However, the CD and GZ populations could not complete their generation at 16℃. As the habitat latitude and altitude increased, the developmental threshold temperatures of generation and various developmental stages of the populations gradually decreased, while their effective accumulated temperatures exhibited an increasing trend. The developmental threshold temperatures of the GZ, QJ, CD, ZZ and YA populations were 15.61, 10.76, 14.93, 11.46 and 10.51℃, respectively. The developmental threshold temperatures of generation of the GZ and CD populations were significantly higher than those of the other populations. The effective accumulated temperature of the GZ, QJ, CD, ZZ and YA populations were 828.41, 1 482.94, 963.13, 1 295.80, and 1 430.98 degree-days, respectively. The effective accumulated temperatures of the QJ and YA populations were significantly higher than those of the other populations. The temperature 24℃ is the optimal environmental temperature for the five geographical populations. The effective accumulated temperature of each developmental stage of different geographical populations is significantly negatively correlated with the annual average temperature of their habitats, while the developmental threshold temperature is significantly positively correlated with the annual average temperature of their habitats. 【Conclusion】 The results suggest that there exist differences in the adaptability of different geographical populations of A. sinensis to environmental temperature, and their adaptability to low environmental temperature increases with the increase in habitat latitude and altitude, while that to high environmental temperature show the opposite trend.