Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Host plant species"”.
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MATERNAL EFFECTS AND SEXUAL SELECTION IN THE HELICONIA BUG, LEPTOSCELIS TRICOLOR (HEMIPTERA: COREIDAE)
… Females heliconia bugs lay eggs on several species of heliconia plants in Panama and Costa Rica. Host plant species choice by mothers largely determines the natal environment that offspring will experience due to the limited mobility of juveniles. Insects that emerged on one species of …
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MATERNAL EFFECTS AND SEXUAL SELECTION IN THE HELICONIA BUG, LEPTOSCELIS TRICOLOR (HEMIPTERA: COREIDAE)
… Females heliconia bugs lay eggs on several species of heliconia plants in Panama and Costa Rica. Host plant species choice by mothers largely determines the natal environment that offspring will experience due to the limited mobility of juveniles. Insects that emerged on one species of …
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Enhancing the weaver ant, <i>Oecophylla smaragdina</i> (Hymenoptera: Formicidae), for biological control of a shoot borer, <i>Hypsipyla robusta</i> (Lepidoptera: Pyralidae), in Malaysian mahogany plantations
… conserve ant colonies redistributed to mahogany plantations have not yet been developed. The effect of food supplementation and host plant species preference of the weaver ant, <i>Oecophylla smaragdina</i> F., was evaluated in a series of field studies. A simple model was developed to estimate …
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Multitrophic Interactions in a Prairie Insect Community: Ecology, Behavior, and Conservation
… of their original pre-settlement area. The plant communities of this ecosystem are relatively well known and appreciated, but little is known of the biology of most insects that are endemic to prairie ecosystems of North America, with the exception of large and conspicuous species. In …
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Coevolution of Heliconius spp. and Passiflora spp. : a phylogenetic comparison
… established and compared. The phylogeny for 14 species ofHeliconiinae from Costa Rica was based on combined sequence data from rRNA ITS 2 and partial EF-1a gene regions. For the Passifloraceae, 17 host plant species were utilized to establish a phylogeny based on tRNALeucine and ITS 1/5.8S1 ITS …
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Patterns of association in a co-introduced insect herbivore and parasitoid wasp
Species within trophic networks that experience a range expansion can lead to populations of coevolved species re-associating in some areas, not associating in others, or creating novel associations with native species at one or more trophic level(s). Although most studies have focused …
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Integrating Above and Belowground Components of Biodiversity across Spatial Scales: The Role of Host Plants in the Distribution of Arbuscular Mycorrhizal Fungi
… Mycorrhizal (AM) fungi are a group of obligate plant root endosymbionts, which form associations with an estimated two thirds of terrestrial plant species. Their extra-radical mycelium extends throughout the soil and absorbs nutrients that are transferred to their host plant in exchange for a …
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THE IMPACT OF FOREST SUCCESSIONAL STATUS ON COMMUNITY STRUCTURE OF NEOTROPICAL CERAMBYCID BEETLES
… forest of Costa Rica, thirty-nine trees in five plant families (Fabaceae, Lecythidaceae, Malvaceae, Moraceae, and Sapotaceae) were sampled in a mosaic of old growth and secondary forest. They yielded 3545 cerambycid individuals in 49 species. Species richness was almost identical in old growth …
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Analysis of the Potential for Diazotrophic Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis
… production. Inoculation of bioenergy crops with plant growth promoting endophytes has the potential to reduce the fertilizer inputs through the enhancement of biological nitrogen fixation. While nitrogen fixing (diazotrophic) endophytes colonize many wild plants, these natural relationships may …
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Are Weevils Picky Eaters? Community Structure and Host Specificity of Neotropical Saproxylic Beetles (Coleoptera: Curculionidae)
… to other decomposers. Understanding beetle host preferences and patterns of community assembly is critical for their conservation, and for predicting which species might become invasive. This project aims to investigate the ecological and host specificity, as well as the community …
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Host Plant and Spatial Influences on the Natural Enemy Community Structure of a Host Specific Insect Herbivore
… (Hymenoptera: Cynipidae) on the leaves of its host plants across the gall former's geographic range while controlling for spatial autocorrelation among sample sites. Belonocnema treatae exhibits regional host plant specialization across the southern US on three live oak species, Quercus …
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The role of emerging hosts in the North American emerald ash borer invasion: Implications for natural enemy-free space
… killing stressed trees. In North America, EAB’s host range has expanded to include healthy trees of every Fraxinus species encountered, most recently Oregon ash (F. latifolia). Successful EAB development has also been reported on two non-ash hosts: white fringetree (Chionanthus virginicus) and …
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Drosophila suzukii (Matsumura) (Diptera: Drosphilidae): Risk Assessment For An Invasive Vinegar Fly In Virginia Vineyards
… to utilize a wide range of cultivated and wild host plants. A host plant survey was conducted at four vineyards in the Piedmont Region of Virginia to identify hosts used by D. suzukii around vineyards. The seasonal availability of host plants and adult emergence from them were tracked. Six host …
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Holocene palaeohydrology from testate amoebae analysis: developing a model for British peatlands
… the responses of individual testate amoebae species to environmental variables on ombrotrophic mires, since the peatland-climate link makes these habitats the one of the most useful in palaeoclimate reconstructions. 163 samples of modern testate amoebae faunas were obtained from 9 …
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Host plant associations of two cochineal insect species, Dactylopius ceylonicus and D. opuntiae (Dactylopiidae: Hemiptera), on the invasive cactus species Opuntia monacantha, O. ficus-indica and a possible hybrid cactus, in South Africa
Several cochineal species have been used with great success for biological control of invasive cactus species, both in South Africa and elsewhere. Although most cochineal species are oligophagous, they are all exclusively associated with opuntioid cacti and therefore pose minimal risk of non-target …
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Composition, spatial abundance, co-occurrence and host preference of mistletoes in the Central highland savanna of Namibia
Aerial parasitic plants, commonly called mistletoes, are a polyphyletic group of organisms with a common evolutionary ancestor. This study was aimed at determining composition, spatial abundance within hosts, co-occurrence and host preference of mistletoes in the central highland savannas. The …
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Interplay between selenium hyperaccumulator plants and their microbiome
The plant microbiome includes all microorganisms that occur on the plant root (rhizosphere) and shoot (phyllosphere) or inside plants (endosphere). Many of these microbes benefit their host by promoting growth, helping acquire nutrients or by alleviating biotic or abiotic stress. In addition to its …
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Effect of Arbuscular mycorrhizal fungi and plant growth-promoting rhizobacteria on glomalin production
… However, other soil microorganisms such as plant growth-promoting rhizobacteria (PGPR) that interact with AMF could indirectly influence glomalin production. The objectives of this study were to determine the effects of AMF and PGPR interactions on glomalin production and identify possible …