Species-specific plant-mediated effects between herbivores converge at high damage intensity

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dc.citation.articleNumbere3647en_US
dc.citation.issueNumber5en_US
dc.citation.journalTitleEcologyen_US
dc.citation.volumeNumber103en_US
dc.contributor.authorWan, Jinlongen_US
dc.contributor.authorYi, Jiahuien_US
dc.contributor.authorTao, Zhibinen_US
dc.contributor.authorRen, Zhikunen_US
dc.contributor.authorOtieno, Evans O.en_US
dc.contributor.authorTian, Baoliangen_US
dc.contributor.authorDing, Jianqingen_US
dc.contributor.authorSiemann, Evanen_US
dc.contributor.authorErb, Matthiasen_US
dc.contributor.authorHuang, Weien_US
dc.date.accessioned2022-06-08T15:58:49Zen_US
dc.date.available2022-06-08T15:58:49Zen_US
dc.date.issued2022en_US
dc.description.abstractPlants are often exposed to multiple herbivores and densities of these attackers (or corresponding damage intensities) often fluctuate greatly in the field. Plant-mediated interactions vary among herbivore species and with changing feeding intensity, but little is known about how herbivore identity and density interact to determine plant responses and herbivore fitness. Here, we investigated this question using Triadica sebifera (tallow) and two common and abundant specialist insect herbivores, Bikasha collaris (flea beetle) and Heterapoderopsis bicallosicollis (weevil). By manipulating densities of leaf-feeding adults of these two herbivore species, we tested how variations in the intensity of leaf damage caused by flea beetle or weevil adults affected the performance of root-feeding flea beetle larvae and evaluated the potential of induced tallow root traits to predict flea beetle larval performance. We found that weevil adults consistently decreased the survival of flea beetle larvae with increasing leaf damage intensities. In contrast, conspecific flea beetle adults increased their larval survival at low damage then decreased larval survival at high damage, resulting in a unimodal pattern. Chemical analyses showed that increasing leaf damage from weevil adults linearly decreased root carbohydrates and increased root tannin, whereas flea beetle adults had opposite effects as weevil adults at low damage and similar effects as them at high damage. Furthermore, across all feeding treatments, flea beetle larval survival correlated positively with concentrations of carbohydrates and negatively with concentration of tannin, suggesting that root primary and secondary metabolism might underlie the observed effects on flea beetle larvae. Our study demonstrates that herbivore identity and density interact to determine systemic plant responses and plant-mediated effects on herbivores. In particular, effects are species-specific at low densities, but converge at high densities. These findings emphasize the importance of considering herbivore identity and density simultaneously when investigating factors driving plant-mediated interactions between herbivores, which advances our understanding of the structure and composition of herbivore communities and terrestrial food webs.en_US
dc.identifier.citationWan, Jinlong, Yi, Jiahui, Tao, Zhibin, et al.. "Species-specific plant-mediated effects between herbivores converge at high damage intensity." <i>Ecology,</i> 103, no. 5 (2022) Wiley: https://doi.org/10.1002/ecy.3647.en_US
dc.identifier.digitalEcology-2022-Wanen_US
dc.identifier.doihttps://doi.org/10.1002/ecy.3647en_US
dc.identifier.urihttps://hdl.handle.net/1911/112449en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleSpecies-specific plant-mediated effects between herbivores converge at high damage intensityen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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