Fortin M, Mauffette Y, Albert P J
Groupe de recherche en écologie forestière (GREF), Université du Québec à Montréal, C.P. 8888 Succ. A, Montréal, QC, Canada.
Environ Pollut. 1997;97(3):303-9. doi: 10.1016/s0269-7491(97)00079-1.
The effects of exposure of sugar maple (Acer saccharum Marsh.) to ozone on the entire larval stage of a native insect have not been previously investigated. This study reports the effects of sugar maple seedlings exposed to different ozone concentrations on the relative performance and the feeding preference of the forest tent caterpillar (Malacosoma disstria Hbn.). Three-year-old seedlings were set in nine open-top field chambers in the spring of 1992 and 1993. Three ozone concentrations were generated: charcoal-filtered ambient air (0x), ambient air (1x) and three times ambient air (3x). In 1992, female and male larval development time did not differ among ozone treatments. In 1993, female larvae reared on 3x developed faster than those on 0x and 1x, while male larvae were not affected. Ozone treatments did not influence pupal weights except for males in 1993 where pupae reared on 0x were heavier than 1x but did not differ from 3x. Larval and pupal survival rates were not affected by ozone in either year. Finally, 4th and 5th instar larvae showed a significant feeding preference for 3x foliage in 1993 but not in 1992. The response of the forest tent caterpillar to ozone exposed seedlings varied between years and could be more sensitive to annual climatic variations than ozone.
此前尚未研究过糖枫（糖槭）暴露于臭氧环境对一种本地昆虫整个幼虫阶段的影响。本研究报告了糖枫幼苗暴露于不同臭氧浓度下对森林天幕毛虫（Malacosoma disstria Hbn.）相对生长性能和取食偏好的影响。1992年和1993年春季，将三年生幼苗放置在九个开放式田间试验箱中。设置了三种臭氧浓度：经活性炭过滤的环境空气（0倍）、环境空气（1倍）和三倍环境空气（3倍）。1992年，不同臭氧处理间雌雄幼虫的发育时间没有差异。1993年，在3倍臭氧浓度环境中饲养的雌幼虫比在0倍和1倍环境中的发育更快，而雄幼虫不受影响。除了1993年的雄虫外，臭氧处理对蛹重没有影响，1993年在0倍臭氧浓度环境中饲养的雄蛹比在1倍环境中的重，但与3倍环境中的没有差异。两年中幼虫和蛹的存活率均未受臭氧影响。最后，1993年4龄和5龄幼虫对3倍臭氧浓度处理的叶片表现出显著的取食偏好，但1992年没有。森林天幕毛虫对暴露于臭氧环境下的幼苗的反应因年份而异，可能对年度气候变化比臭氧更敏感。
