| Title: | Synergistic effects of insect herbivory and changing climate on plant volatile emissions in the subarctic tundra |
| Author(s): | Rieksta J; Li T; Michelsen A; Rinnan R; |
| Address: | "Terrestrial Ecology Section, Department of Biology, University of Copenhagen, Copenhagen, Denmark. Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen K, Denmark. Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China" |
| ISSN/ISBN: | 1365-2486 (Electronic) 1354-1013 (Print) 1354-1013 (Linking) |
| Abstract: | "Climate change increases the insect abundance, especially in Arctic ecosystems. Insect herbivory also significantly increases plant emissions of volatile organic compounds (VOCs), which are highly reactive in the atmosphere and play a crucial role in atmospheric chemistry and physics. However, it is unclear how the effects of insect herbivory on VOC emissions interact with climatic changes, such as warming and increased cloudiness. We assessed how experimental manipulations of temperature and light availability in subarctic tundra, that had been maintained for 30 years at the time of the measurements, affect the VOC emissions from a widespread dwarf birch (Betula nana) when subjected to herbivory by local geometrid moth larvae, the autumnal moth (Epirrita autumnata) and the winter moth (Operophtera brumata). Warming and insect herbivory on B. nana stimulated VOC emission rates and altered the VOC blend. The herbivory-induced increase in sesquiterpene and homoterpene emissions were climate-treatment-dependent. Many herbivory-associated VOCs were more strongly induced in the shading treatment than in other treatments. We showed generally enhanced tundra VOC emissions upon insect herbivory and synergistic effects on the emissions of some VOC groups in a changing climate, which can have positive feedbacks on cloud formation. Furthermore, the acclimation of plants to long-term climate treatments affects VOC emissions and strongly interacts with plant responses to herbivory. Such acclimation complicates predictions of how climate change, together with interacting biotic stresses, affects VOC emissions in the high latitudes" |
| Keywords: | Animals Betula Climate Change Ecosystem *Herbivory Insecta Tundra *Volatile Organic Compounds biotic stress dwarf birch ecosystem-atmosphere interactions geometrid moth insect herbivory subarctic volatile organic compounds; |
| Notes: | "MedlineRieksta, Jolanta Li, Tao Michelsen, Anders Rinnan, Riikka eng England 2021/06/30 Glob Chang Biol. 2021 Oct; 27(20):5030-5042. doi: 10.1111/gcb.15773. Epub 2021 Jul 17" |
