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Population- and Species-Based Variation of Webworm–Parasitoid Interactions in Hogweeds (Heracelum spp.) in the Netherlands
Environmental Entomology ( IF 1.7 ) Pub Date : 2020-05-27 , DOI: 10.1093/ee/nvaa052
Jeffrey A Harvey 1, 2 , Paul J Ode 3 , Rieta Gols 4
Affiliation  

Abstract In three Dutch populations of the native small hogweed (Heracleum sphondylium L. [Apiales: Apiaceae]), and one of the invasive giant hogweed (H. mantegazzianum Sommeier & Levier [Apiales: Apiaceae]), interactions between a specialist herbivore, the parsnip webworm (Depressaria radiella), and its associated parasitoids were compared during a single growing season. We found host plant species-related differences in the abundance of moth pupae, the specialist polyembryonic endoparasitoid, Copidosoma sosares, the specialist pupal parasitoid, Barichneumon heracliana, and a potential hyperparasitoid of C. sosares, Tyndaricus scaurus Walker (Hymenoptera: Encyrtidae). Adult D. radiella body mass was similar across the three small hogweed populations, but moths and their pupal parasitoid B. heracliana were smaller when developing on giant than on small hogweeds where the two plants grew in the same locality (Heteren). Mixed-sex and all-male broods of C. sosares were generally bigger than all-female broods. Furthermore, adult female C. sosares were larger than males and adult female mass differed among the three small hogweed populations. The frequency of pupal parasitism and hyperparasitism also varied in the different H. sphondylium populations.These results show that short-term (intra-seasonal) effects of plant population on multitrophic insects are variable among different species in a tightly linked food chain.

中文翻译:

荷兰猪草(Heracelum spp.)中基于种群和物种的蠕虫-寄生蜂相互作用的变化

摘要 在荷兰本土小猪草 (Heracleum sphondylium L. [Apiales: Apiaceae]) 和一种侵入性巨型猪草 (H. mantegazzianum Sommeier & Levier [Apiales: Apiaceae]) 的三个种群中,专家草食动物、欧洲防风网虫(Depressaria radiella)及其相关寄生蜂在一个生长季节进行了比较。我们发现了与寄主植物物种相关的蛾蛹、专业多胚内寄生物 Copidosoma sosares、专业蛹寄生物 Barichneumon heracliana 和 C. sosares 的潜在超寄生生物 Tyndaricus scaurus Walker(膜翅目:Encyrtidae)的差异。三个小型猪草种群的成年 D. radiella 体重相似,但飞蛾及其蛹寄生物 B. 与两种植物生长在同一地点(Heteren)的小型猪草相比,heracliana 在巨型猪草上发育时更小。C. sosares 的混合性别和全雄性育雏一般比全雌性育雏大。此外,成年雌性 C. sosares 大于雄性,并且在三个小猪草种群中成年雌性质量不同。蛹寄生和超寄生的频率在不同的 H. sphondylium 种群中也有所不同。这些结果表明,植物种群对多营养昆虫的短期(季节性)影响在紧密相连的食物链中的不同物种之间是不同的。sosares 比男性大,并且在三个小猪草种群中成年女性的质量不同。蛹寄生和超寄生的频率在不同的 H. sphondylium 种群中也有所不同。这些结果表明,植物种群对多营养昆虫的短期(季节性)影响在紧密相连的食物链中的不同物种之间是不同的。sosares 比男性大,并且在三个小猪草种群中成年女性的质量不同。蛹寄生和超寄生的频率在不同的 H. sphondylium 种群中也有所不同。这些结果表明,植物种群对多营养昆虫的短期(季节性)影响在紧密相连的食物链中的不同物种之间是不同的。
更新日期:2020-05-27
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