Effects of Elevated CO2 Concentration on Parasitism and Offspring Fitness of Aphidius ervi

doi:10.11924/j.issn.1000-6850.casb2022-0955

Abstract

Abstract:

The objective of this paper was to study the effects of elevated CO₂ concentration on parasitism and offspring fitness of Aphidius ervi. Aphidius ervi were continuously cultured three generations in artificial climate chamber at 24℃ and CO₂ concentrations of 380 μL/L, 550 μL/L and 750 μL/L respectively. The results showed that the parasitism rate, eclosion rate, female proportion, and adult longevity of Aphidius ervi significantly decreased, while no significant effect on the developmental duration as the concentration of CO₂increases. The generation factor had also no significant effect on the developmental duration of the Aphidius ervi. Furthermore, the longevity of the Aphidius ervi significantly reduced as CO₂ concentration increased. No significant differences in the parasitism rate, the eclosion rate, the female proportion, developmental duration, and adult longevity were observed between generations of the Aphidius ervi. Our results suggested that the parasitic effects of the Aphidius ervi was reduced by elevated CO₂ levels. Therefore, it is speculated that the control effect of the Aphidius ervi on the pea aphid will decrease with the increase of atmospheric CO₂concentration.

Key words: Aphidius ervi, inclusive fitness, different CO₂ concentration, effect of parasitism, Acyrthosiphon pisum

YANG Zeyuan, ZHANG Kexin, LIU Changzhong. Effects of Elevated CO₂ Concentration on Parasitism and Offspring Fitness of Aphidius ervi[J]. Chinese Agricultural Science Bulletin, 2023, 39(33): 134-139.

Figures/Tables 6

References 21

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世代	CO₂浓度/(μL/L)	寄生率/%	羽化率/%	雌性比/%
F₁	380	63.43±2.99Aa	98.24±1.65Aa	55.03±1.40Aa
	550	60.00±2.31Aa	96.65±2.00Aa	51.91±1.51Ab
	750	54.00±1.63Ab	91.00±2.00Ab	45.90±1.75Ac
F₂	380	64.00±2.31Aa	97.74±1.55Aa	55.70±1.22Aa
	550	59.43±2.23Ab	96.58±2.07Aa	52.23±1.95Aa
	750	53.43±2.23Ac	90.34±2.14Ab	46.16±1.39Aa
F₃	380	63.71±3.15Aa	97.72±1.56Aa	54.33±0.72Aa
	550	59.71±1.80Aa	95.71±1.64Aa	52.22±1.29Aa
	750	53.14±1.95Ab	90.35±1.85Ab	45.78±1.85Ab

世代	CO₂浓度/(μL/L)	寄生率/%	羽化率/%	雌性比/%
F₁	380	63.43±2.99Aa	98.24±1.65Aa	55.03±1.40Aa
	550	60.00±2.31Aa	96.65±2.00Aa	51.91±1.51Ab
	750	54.00±1.63Ab	91.00±2.00Ab	45.90±1.75Ac
F₂	380	64.00±2.31Aa	97.74±1.55Aa	55.70±1.22Aa
	550	59.43±2.23Ab	96.58±2.07Aa	52.23±1.95Aa
	750	53.43±2.23Ac	90.34±2.14Ab	46.16±1.39Aa
F₃	380	63.71±3.15Aa	97.72±1.56Aa	54.33±0.72Aa
	550	59.71±1.80Aa	95.71±1.64Aa	52.22±1.29Aa
	750	53.14±1.95Ab	90.35±1.85Ab	45.78±1.85Ab

变量	CO₂浓度		世代		CO₂浓度和世代
变量	F-value	P	F-value	P	F-value	P
寄生率	F(2,54)=101.40	P<0.01	F(2,54)=0.0814	P=0.9219	F(4,54)=0.19	P=0.9447
羽化率	F(2,54)=92.33	P<0.01	F(2,54)=0.7709	P=0.4676	F(4,54)=0.13	P=0.9689
雌性比	F(2,54)=202.30	P<0.01	F(2,54)=0.8591	P=0.4292	F(4,54)=0.41	P=0.7971

变量	CO₂浓度		世代		CO₂浓度和世代
变量	F-value	P	F-value	P	F-value	P
寄生率	F(2,54)=101.40	P<0.01	F(2,54)=0.0814	P=0.9219	F(4,54)=0.19	P=0.9447
羽化率	F(2,54)=92.33	P<0.01	F(2,54)=0.7709	P=0.4676	F(4,54)=0.13	P=0.9689
雌性比	F(2,54)=202.30	P<0.01	F(2,54)=0.8591	P=0.4292	F(4,54)=0.41	P=0.7971

世代	CO₂浓度/(μL/L)	雌性&雄性	雌性	雄性
F₁	380	10.75±0.57Bb	10.86±0.56Aa	10.61±0.55Bb
	550	10.97±0.55Aa	10.98±0.65ABa	10.94±0.42Aa
	750	10.85±0.74Aab	10.89±0.96Aa	10.81±0.47Aab
F₂	380	10.93±0.48Aa	10.95±0.61Aa	10.90±0.22Aa
	550	10.97±0.47Aa	11.07±0.49Aa	10.86±0.43Aa
	750	10.81±0.70Aa	10.88±0.85Aa	10.76±0.54Aa
F₃	380	11.02±0.56Aa	11.03±0.56Aa	11.00±0.57Aa
	550	10.77±0.45Bb	10.79±0.36Ba	10.75±0.54Ab
	750	10.81±0.67Ab	10.88±0.67Aa	10.75±0.68Ab

Effects of Elevated CO₂ Concentration on Parasitism and Offspring Fitness of Aphidius ervi

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变量	性别	CO₂浓度		世代		CO₂浓度和世代
变量	性别	F-value	P	F-value	P	F-value	P
发育历期/d	雌性&雄性	F(2,1730)=3.30	P=0.0381	F(2,1730)=1.20	P=0.2983	F(4,1730)=9.30	P<0.01
	雌性	F(2,879)=0.84	P=0.4335	F(2,879)=0.93	P=0.3958	F(4,879)=3.10	P=0.0162
	雄性	F(2,834)=2.00	P=0.1356	F(2,834)=0.91	P=0.4041	F(4,834)=9.20	P<0.01

世代	CO₂浓度/(μL/L)	雌性&雄性	雌性	雄性
F₁	380	1.89±0.23Aa	1.75±0.18Aa	2.04±0.17Aa
	550	1.61±0.23Ab	1.50±0.13Ab	1.72±0.24Ab
	750	1.23±0.15Ac	1.13±0.08Ac	1.35±0.16Ac
F₂	380	1.89±0.23Aa	1.74±0.16Aa	2.04±0.19Aa
	550	1.61±0.21Ab	1.49±0.16Ab	1.72±0.19Ab
	750	1.23±0.23Ac	1.13±0.22Ac	1.33±0.20Ac
F₃	380	1.89±0.56Aa	1.74±0.18Aa	2.03±0.15Aa
	550	1.65±0.28Ab	1.50±0.25Ab	1.72±0.22Ab
	750	1.24±0.17Ac	1.13±0.09Ac	1.33±0.13Ac

变量	性别	CO₂浓度		世代		CO₂浓度和世代
变量	性别	F-value	P	F-value	P	F-value	P
寿命/d	雌性&雄性	F(2,1251)=959	P<0.01	F(2,1251)=0.59	P=0.5560>0.05	F(4,1251)=0.58	P=0.6755>0.05
	雌性	F(2,621)=707	P<0.01	F(2,621)=0.01	P=0.9886>0.05	F(4,621)=0.12	P=0.9768>0.05
	雄性	F(2,621)=738	P<0.01	F(2,621)=0.13	P=0.8771>0.05	F(4,621)=0.06	P=0.9941>0.05

变量	性别	CO₂浓度		世代		CO₂浓度和世代
变量	性别	F-value	P	F-value	P	F-value	P
寿命/d	雌性&雄性	F(2,1251)=959	P<0.01	F(2,1251)=0.59	P=0.5560>0.05	F(4,1251)=0.58	P=0.6755>0.05
	雌性	F(2,621)=707	P<0.01	F(2,621)=0.01	P=0.9886>0.05	F(4,621)=0.12	P=0.9768>0.05
	雄性	F(2,621)=738	P<0.01	F(2,621)=0.13	P=0.8771>0.05	F(4,621)=0.06	P=0.9941>0.05