Planthoppers
Their Ecology and Management
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Predator hunting mode influences patterns of prey use from grazing and epigeic food webs
Multichannel omnivory by generalist predators, especially the use of both grazing and epigeic prey, has the potential to increase predator abundance and decrease herbivore populations. However, predator use of...
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Toward a mechanistic understanding of competition in vascular-feeding herbivores: an empirical test of the sink competition hypothesis
Recent evidence suggests that competitive interactions among herbivores are mostly indirect and mediated by plant responses to herbivory. Most studies, however, emphasize chewing insects and secondary chemistr...
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Article
Effects of Plant Vascular Architecture on Aboveground–Belowground-Induced Responses to Foliar and Root Herbivores on Nicotiana tabacum
Herbivores induce systemic changes in plant traits, and the strength of these induced responses is often associated with the degree of vascular connectivity that links damaged and undamaged plant tissues. Alth...
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Article
Leafhopper-induced plant resistance enhances predation risk in a phytophagous beetle
Many herbivores elicit biochemical, physiological, or morphological changes in their host plants that render them more resistant to co-occurring herbivores. Yet, despite the large number of studies that invest...
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Consequences of nitrogen and phosphorus limitation for the performance of two planthoppers with divergent life-history strategies
Phytophagous insects have a much higher nitrogen and phosphorus content than their host plants, an elemental mismatch that places inherent constraints on meeting nutritional requirements. Although nitrogen lim...
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Spatial refuge from intraguild predation: implications for prey suppression and trophic cascades
The ability of predators to elicit a trophic cascade with positive impacts on primary productivity may depend on the complexity of the habitat where the players interact. In structurally-simple habitats, troph...
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Trade-off in investment between dispersal and ingestion capability in phytophagous insects and its ecological implications
In population ecology, dispersal plays a fundamental role, but is potentially costly. Traditionally, studies of phenotypic trade-offs involving dispersal focus on resource allocation differences between flight...
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Chapter
Multiple Predator Interactions and Food-Web Connectance: Implications for Biological Control
The use of single versus multiple natural enemies in biological control remains controversial, largely due to the possibility for antagonistic interactions among predators (e.g., intraguild predation and canni...
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Article
Sap-feeding Insect Communities as Indicators of Habitat Fragmentation and Nutrient Subsidies
Upland salt marsh vegetation is particularly prone to habitat fragmentation and nutrient run-off due to coastal development and nearby agriculture. By examining how communities of sap-feeding insects respond t...
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Article
Predator diversity dampens trophic cascades
Food web complexity is thought to weaken the strength of terrestrial trophic cascades1,2,3 in which strong impacts of natural enemies on herbivores cascade to influence primary production indirectly4. Predator di...
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Article
Responses of invertebrate natural enemies to complex-structured habitats: a meta-analytical synthesis
The structural complexity of habitats has been espoused as an important factor influencing natural-enemy abundance and food-web dynamics in invertebrate-based communities, but a rigorous synthesis of published...
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Article
Seasonal shift from bottom-up to top-down impact in phytophagous insect populations
Although many studies now examine how multiple factors influence the dynamics of herbivore populations, few studies explicitly attempt to document where and when each is important and how they vary and interac...
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Article
Nutritional constraints in terrestrial and freshwater food webs
Biological and environmental contrasts between aquatic and terrestrial systems have hindered analyses of community and ecosystem structure across Earth's diverse habitats. Ecological stoichiometry1,2 provides an ...
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Article
Interspecific variation in the escape responses of aphids: effect on risk of predation from foliar-foraging and ground-foraging predators
A series of laboratory experiments was conducted to determine the effect of interspecific differences on prey defensive behavior on the susceptibility of two aphid species (Acyrthosiphon pisum and A. kondoi) to ...
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Chapter
Life-History Strategies and the Genetic Structure of Phytophagous Insect Populations
Spatial variation in selection creates the potential for local adaptation, but the realization of this potential is governed by the balance between selection and the countering effects of both genetic drift an...
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Chapter
Dispersal and Adaptive Deme Formation in Sedentary Coccoid Insects
Reproductive isolation of populations may eventually lead to genetic differentiation as gene pools are altered by localized selective factors and drift. The spatial structuring of genetic differentiation depen...
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Article
The influence of plant species on attraction and host acceptance inCotesia glomerata (Hymenoptera: Braconidae)
Females of the larval parasitoidCotesia glomerata (L.) use plant-associated cues to locate their lepidopteran host,Pieris rapae L. In this study we investigated the influence of four host plant species,Brassica o...
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Article
Influence of Prokelisia Planthoppers on Amino Acid Composition and Growth of Spartina alterniflora
The effects of feeding by the planthopper Prokelisia dolus on its hostSpartina alterniflorawere examined under conditions of both high and low plant-nitrogen subsidy. Phloem feeding by P. dolus reduced the concen...
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The evolution of dispersal polymorphisms in insects: The influence of habitats, host plants and mates
Wing-dimorphic, delphacid planthoppers were used to test hypotheses concerning the effects of habitat persistence and architectural complexity on the occurrence of dispersal. For reasons concerning both the du...
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