Advanced phenology of higher trophic levels shifts aphid host plant preferences and performance
The abundance of insect herbivores, such as aphids, is mediated by interactions with higher and lower trophic levels. Bottom-up processes can affect the phloem sap quality that aphids depend on for food, while natural enemies exert top-down control to directly and indirectly impact the success of aphids. This research asks (1) how phenological change across trophic levels affects host plant quality and selection for aphids, and (2) what mechanisms drive the ability of aphids to distinguish between potential hosts. We used a tri-trophic system to investigate these questions. Ligusticum porteri ...
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