Bezemer T Martijn, Jones T Hefin, Knight Kevin J
NERC Centre for Population Biology, Imperial College at Silwood Park, Ascot, Berkshire, SL5 7PY, UK e-mail:
Oecologia. 1998 Aug;116(1-2):128-135. doi: 10.1007/s004420050571.
Model terrestrial ecosystems were set-up in the Ecotron controlled environment facility. The effects of elevated CO (ambient + 200 [Formula: see text]mol/mol) and temperature (ambient + 2.0°C) on plant chemistry, the abundance of the peach potato aphid Myzus persicae, and on the performance of one of its parasitoids Aphidius matricariae, were studied. Total above-ground plant biomass at the end of the experiment was not affected by elevated atmospheric CO, nor were foliar nitrogen and carbon concentrations. Elevated temperature decreased final plant biomass while leaf nitrogen concentrations increased. Aphid abundance was enhanced by both the␣CO and temperature treatment. Parasitism rates remained unchanged in elevated CO, but showed an increasing trend in conditions of elevated temperature. Our results suggest that M. persicae, an important pest of many crops, might increase its abundance under conditions of climate change.
在生态otron控制环境设施中建立了模拟陆地生态系统。研究了高浓度二氧化碳（环境浓度 + 200 μmol/mol）和温度升高（环境温度 + 2.0°C）对植物化学组成、桃蚜Myzus persicae的数量及其一种寄生蜂Aphidius matricariae的寄生表现的影响。实验结束时地上部植物总生物量不受大气二氧化碳浓度升高的影响，叶片氮和碳浓度也不受影响。温度升高降低了最终植物生物量，而叶片氮浓度增加。二氧化碳浓度升高和温度处理均增加了蚜虫数量。在二氧化碳浓度升高时寄生率保持不变，但在温度升高的条件下呈上升趋势。我们的结果表明，桃蚜作为许多作物的重要害虫，在气候变化条件下可能会增加其数量。
