Climate warming increases biological control agent impact on a non-target species.
Climate change may shift interactions of invasive plants, herbivorous insects and native plants, potentially affecting biological control efficacy and non-target effects on native species. Here, we show how climate warming affects impacts of a multivoltine introduced biocontrol beetle on the non-target native plant Alternanthera sessilis in China. In field surveys across a latitudinal gradient covering their full distributions, we found beetle damage on A. sessilis increased with rising temperature and plant life history changed from annual to perennial. Experiments showed that elevated temperature changed plant life history and increased insect overwintering, damage and impacts on seedling recruitment. These results suggest that warming can shift phenologies, increase non-target effect magnitude and increase non-target effect occurrence by beetle range expansion to additional areas where A. sessilis occurs. This study highlights the importance of understanding how climate change affects species interactions for future biological control of invasive species and conservation of native species.
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Institute/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, China; Department of Ecology and Evolutionary Biology, Rice University, Houston, TX, 77005, USA; Hubei Key Laboratory of Wetland Evolution& Ecological Restoration, Wuhan Botanical Institute/Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, China.
Xinmin
X
Lu
Evan
E
Siemann
Minyan
M
He
Hui
H
Wei
Xu
X
Shao
Jianqing
J
Ding
D027703:Amaranthaceae; D000818:Animals; D061046:Biological Control Agents; D002681:China; D057231:Climate Change; D001517:Coleoptera; D017753:Ecosystem; D060434:Herbivory; D058865:Introduced Species
D061046:Biological Control Agents
Biological control; climate change; exotic insect; life history; native plant; non-target effect; range expansion; warming