Elevated CO2 lessens predation of Chrysopa sinica on Aphis gossypii
Elevated CO2 lessens predation of Chrysopa sinica on Aphis gossypii
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二氧化碳浓度升高会减少中华草蛉对棉蚜的捕食
DOI：
10.1111/j.1570-7458.2010.00979.x
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发表时间：
2010-05-01
影响因子：
1.9
通讯作者：
Ge, Feng
中科院分区：
文献类型：
--
作者：
Gao, Feng;Chen, Fajun;Ge, Feng
大多数关于大气CO2浓度升高对生物体影响的研究都集中在植物或食草动物的表现上。很少有报告研究的影响，捕食者的能力，在第三营养级。在本实验中，我们利用开顶式气室来量化CO2浓度升高对连续两代中国草蛉的生长、发育和捕食能力的影响，这些草蛉以棉蚜Aphis gossypii（格洛弗）（半翅目：蚜虫科）为食，棉蚜以棉花为饲养对象。（锦葵科），生长在升高的CO2（双环境与环境）。大气CO_2浓度升高，使幼虫发育历期缩短，蛹存活率降低，雌成虫体重下降。对幼虫各期存活率、雌成虫产卵量、卵孵化率和成虫寿命无显著影响。对三龄幼虫的捕食能力和整个幼虫期的捕食能力进行了测定。sinica取食A.在CO2浓度升高的环境中，棉蚜的生长量显著降低。第一代草蛉种群消耗的蚜虫数量在不同的CO2处理下没有显著变化;然而，随着CO2浓度的升高，第二代草蛉种群消耗的蚜虫数量显著减少。我们推测A. CO_2浓度升高时，棉蚜的捕食能力降低，可能成为一种更为严重的害虫。sinica在A.棉。
Most studies on the effects of elevated atmospheric CO2 on organisms have focused on the performance of plants or herbivores. Few reports have examined the impact on the ability of predators at the third trophic level. In this experiment, we made use of open‐top chambers to quantify the effects of elevated CO2 on growth, development, and predatory ability of two successive generations of Chinese lacewing, Chrysopa sinica (Tjeder) (Neuroptera: Chrysopidae), feeding on cotton aphids, Aphis gossypii (Glover) (Hemiptera: Aphididae), which were reared on cotton, Gossypium hirsutum L. (Malvaceae), grown under elevated CO2 (double ambient vs. ambient). Higher atmospheric CO2 concentrations reduced the duration of larval development and the survival rate of pupae, and caused decreased weight in adult female C. sinica, but had no significant effects on survival rate of each larval stage, female adult fecundity, egg hatch rate, or adult life span. The predatory ability of larvae in the third instar and the total larval stage of C. sinica that fed on A. gossypii were significantly lower in elevated CO2 environments. The number of aphids consumed by first‐generation lacewing population did not change significantly with different CO2 treatments; however, significantly fewer aphids were consumed by the second generation of the lacewing population with elevated CO2. We speculate that A. gossypii may become a more serious pest under an environment with elevated CO2 concentrations because of the reduced predatory ability of C. sinica on A. gossypii.