Section: Ecology
Topic: Ecology, Biology of interactions

Insect herbivory on urban trees: Complementary effects of tree neighbours and predation

10.24072/pcjournal.106 - Peer Community Journal, Volume 2 (2022), article no. e22.

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Insect herbivory is an important component of forest ecosystems functioning and can affect tree growth and survival. Tree diversity is known to influence insect herbivory in natural forest, with most studies reporting a decrease in herbivory with increasing tree diversity. Urban ecosystems, on the other hand, differ in many ways from the forest ecosystem and the drivers of insect herbivory in cities are still debated. We monitored 48 urban trees from five species – three native and two exotic – in three parks of Montreal (Canada) for leaf insect herbivory and predator activity on artificial larvae, and linked herbivory with both predation and tree diversity in the vicinity of focal trees. Leaf insect herbivory decreased with increasing tree diversity and with increasing predator attack rate. Our findings indicate that tree diversity is a key determinant of multitrophic interactions between trees, herbivores and predators in urban environments and that managing tree diversity could contribute to pest control in cities.

Published online:
DOI: 10.24072/pcjournal.106
Type: Research article
Stemmelen, Alex 1; Paquette, Alain 2; Benot, Marie-Lise 1; Kadiri, Yasmine 1; Jactel, Hervé 1; Castagneyrol, Bastien 1

1 BIOGECO, INRAE, Univ. Bordeaux – 33610 Cestas, France
2 Département des sciences biologiques, Centre d’étude de la forêt (CEF), Université du Québec à Montréal – Centre - Ville Station, P.O. Box 8888, Montréal, Qc H3C 3P8, Canada
License: CC-BY 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights
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Stemmelen, Alex; Paquette, Alain; Benot, Marie-Lise; Kadiri, Yasmine; Jactel, Hervé; Castagneyrol, Bastien. Insect herbivory on urban trees: Complementary effects of tree neighbours and predation. Peer Community Journal, Volume 2 (2022), article  no. e22. doi : 10.24072/pcjournal.106. https://peercommunityjournal.org/articles/10.24072/pcjournal.106/

Peer reviewed and recommended by PCI : 10.24072/pci.ecology.100061

Conflict of interest of the recommender and peer reviewers:
The recommender in charge of the evaluation of the article and the reviewers declared that they have no conflict of interest (as defined in the code of conduct of PCI) with the authors or with the content of the article.

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