Short-term seasonal habitat facilitation mediated by an insect herbivore

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• 作者：Jeffrey A. Harvey^a ; ^b ; ^{j.harvey@nioo.knaw.nl" class="auth_mail" title="E-mail the corresponding author} ; Paul J. Ode^c ; Miriama Malcicka^b ; Rieta Gols^d
• 关键词：Community ; Clubiona phragmitis ; Earwig ; Forficula auricularia ; Ecological interactions ; Porcellio scaber ; Spider ; Woodlice
• 刊名：Basic and Applied Ecology
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：17
• 期：5
• 页码：447-454
• 全文大小：1565 K

文摘

In nature some organisms may facilitate others by creating shelter or other niches that they use for variable periods. We describe a natural multitrophic-species complex in the Netherlands involving a plant, the common hogweed (Heracleum sphondylium) a specialist chewing herbivore, the parsnip webworm (Depressaria pastinacella) and various arthropods associated with them. Larvae of D. pastinacella feed on H. sphondylium seeds and, after they have finished feeding, chew holes in the hollow stems where they pupate. In some areas of the country almost 50% of plants are attacked by webworms. The holes are used by other arthropods to gain access to the stems including herbivores, omnivores, predators and decomposers. The duration of plant occupancy varies between 3 and 4 months, until the plants die. Plants without moth-produced holes were always free of other arthropods, whereas plants with holes, in addition to pupae (and/or mummified-parasitized webworm larvae), often contained many woodlice, earwigs and/or spiders. Earwigs and woodlice perform important ecological functions as predators (in orchards) and decomposers respectively. Our results show that the simple biological activity of one herbivore species can have at least short-term effects on the local arthropod community.