Senescence‐feeders: a new trophic sub‐guild of insect herbivores

White, T. C. R.

doi:10.1111/jen.12147

Cited by 33 publications

(41 citation statements)

References 90 publications

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“…In contrast to a previous study with cup moths on E. tereticornis grown under the combined effects of CO 2 and temperature (Murray et al 2013a), we did not observe significant interactive effects of [CO 2 ] and temperature on P. atomaria. These differences are possibly due to the analysis of mature leaves by Murray et al (2013a) as opposed to the flush leaves analysed here; this had been constrained by the scope of both studies addressing the relevant leaf tissue for insects with different feeding strategies, senescence and flush feeders (White 2014). …”

Section: Discussionmentioning

confidence: 98%

“…There is also a taxonomic bias in the assessment of climate change response studies; e.g., beetles (Coleoptera), the largest insect order, are under-represented (Stiling and Cornelissen 2007;Andrew et al 2013). There may be another bias in the representation of different feeding strategies, such as flush versus senescent leaf feeders (White 2014).…”

Section: Introductionmentioning

confidence: 99%

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Responses of leaf beetle larvae to elevated [CO2] and temperature depend on Eucalyptus species

et al. 2014

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It is essential to understand the combined effects of elevated [CO2] and temperature on insect herbivores when attempting to forecast climate change responses of diverse ecosystems. Plant species differ in foliar chemistry, and this may result in idiosyncratic plant-mediated responses of insect herbivores at elevated [CO2] and temperature. We measured the response of the eucalypt leaf beetle Paropsis atomaria (Coleoptera: Chrysomelidae) feeding on Eucalyptus tereticornis and Eucalyptus robusta. Seedlings were grown at ambient (400 µmol mol(-1)) or elevated (640 µmol mol(-1)) [CO2] and ambient (26/18 °C day/night) or elevated (ambient + 4 °C) temperature in a greenhouse for 7 months. Larvae fed on flush leaves from egg hatch to pupation while being directly exposed to these conditions. Elevated [CO2] reduced foliar [N] and [P], while it increased total nonstructural carbohydrates and the C:N ratio. Elevated temperature increased foliar [N] in E. robusta but not E. tereticornis. Plant-mediated effects of elevated [CO2] reduced female pupal weight and increased developmental time and leaf consumption. Larval survival at elevated [CO2] was impacted differently by the two host plant species; survival increased on E. robusta while it decreased on E. tereticornis. Elevated temperature accelerated larval development but did not impact other insect parameters. We did not detect a CO2 × temperature interaction, suggesting that elevated temperature as a combined direct and plant-mediated effect may not be able to ameliorate the negative plant-mediated effects of elevated [CO2] on insect herbivores. Our study highlighted host-plant-specific responses of insect herbivores to climate change factors that resulted in host-plant-specific survival.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Responses of leaf beetle larvae to elevated [CO2] and temperature depend on Eucalyptus species

et al. 2014

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“…The plant stress hypothesis (PSH) (White 1969(White , 1984 asserts that herbivore performance and populations increase on drought-stressed plants. However, studies have generated conflicting results, and the indirect effect of water-stress on herbivores may depend on the type of plant, type of damage, herbivore feeding guild and species, stress intensity and duration (Larsson 1989;Huberty and Denno 2004;White 2009White , 2014Tariq et al 2012).…”

Section: Introductionmentioning

confidence: 97%

Drought-induced acclimatization of a fast-growing plant decreases insect performance in leaf-chewing and sap-sucking guilds

Valim

Teixeira

Santos

et al. 2016

Arthropod-Plant Interactions

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An initial destabilization of functions triggered by drought stress in plants is followed by acclimatization and acquisition of tolerance; however, knowledge remains limited on drought-mediated changes in plant quality for herbivores. We tested whether a water-stressed fast-growing plant negatively affects host-specialist insects in both sap-sucking and leaf-chewing feeding guilds. Collards (Brassica oleracea var. acephala) were grown in wellwatered, slightly water-stressed and severely water-stressed conditions. Decreasing soil moisture adversely affected plant development, assessed as a reduction in leaf number and size, stomatal size and relative water content. Severely stressed plants had less fiber and glucosinolates; however, they showed more total nitrogen and lipids. Larval survival, pupal weight, reproductive rate (Ro) and rate of population growth (r) were lower when the leaf-chewing Plutella xylostella was reared with severely stressed collards. In multiple-choice tests, moths laid fewer eggs on leaf discs of collard that were exposed to drought. The fecundity of the sap-sucking Brevicoryne brassicae was higher and the development of alates was lower when insects were fed on plants kept in well-watered regime as compared to slight-stress and severe-stress. Despite higher nitrogen content and fewer glucosinolates, a higher level of leaf surface wax in severely stressed collards possibly decreased food quality for both herbivores. Thus, hostspecific herbivores of different guilds showed similar responses to drought-stressed, fast-growing plants. Waterstressed crops could discourage the attack of specialist insects, but the intensity of the stress that is required to achieve this effect will greatly reduce crop production, in terms of plant growth or foliage increment.

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“…hilaris was found more often overall on Br. Senescing plant tissues rapidly decline in quality by exporting nutrients (e.g., sugars and amino acids) to storage or reproductive tissues (Thomas 2013), and most herbivorous insects are incapable of utilizing senescing and senescent plant tissue (White 2015). However, preference was driven primarily by bolting Br.…”

Section: Discussionmentioning

confidence: 99%

Associational susceptibility of a native shrub induced by context‐dependent attraction of an invasive herbivore

2018

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Citation: Lillian, S., R. A. Redak, and M. P. Daugherty. 2018. Associational susceptibility of a native shrub induced by context-dependent attraction of an invasive herbivore. Ecosphere 9(10):Abstract. Indirect interactions among native and invasive species are notoriously difficult to predict.Here, we apply theory from trait-mediated indirect effects and plant-insect interactions to explain the outcomes of multiple invader interactions. The present study investigates the roles of herbivore preference and plant ontogeny in mediating associational effects among a southern California native shrub, Atriplex canescens, an invasive annual forb, Brassica tournefortii, and an invasive stink bug, Bagrada hilaris. Ba. hilaris have been observed to form dense aggregations on A. canescens in late spring following senescence of Br. tournefortii, with subsequent increased mortality of A. canescens. A manipulative experiment found Ba. hilaris recruited to A. canescens in approximately 70 times greater numbers when neighbored by Br. tournefortii than when alone. Ba. hilaris nymph production, while minimized experimentally, occurred only on Br. tournefortii, suggesting A. canescens is not of sufficient quality for Ba. hilaris reproduction. In greenhouse preference trials, Ba. hilaris exhibited an overall preference for Br. tournefortii over A. canescens; however, the magnitude of preference depended on ontogenetic stage of Br. tournefortii. Overall, our results suggest significant potential for associational susceptibility mediated by a combination of Ba. hilaris preference for reproductive Br. tournefortii, substantial aggregation of Ba. hilaris onto Br. tournefortii, and a marked decline in Ba. hilaris preference for Br. tournefortii with advancing ontogeny-triggering spillover onto neighboring plants. Our results demonstrate an important role for multiple invaders and phenologically driven trait changes in mediating associational susceptibility.

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Senescence‐feeders: a new trophic sub‐guild of insect herbivores

Cited by 33 publications

References 90 publications

Responses of leaf beetle larvae to elevated [CO2] and temperature depend on Eucalyptus species

Responses of leaf beetle larvae to elevated [CO2] and temperature depend on Eucalyptus species

Drought-induced acclimatization of a fast-growing plant decreases insect performance in leaf-chewing and sap-sucking guilds

Associational susceptibility of a native shrub induced by context‐dependent attraction of an invasive herbivore

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