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      Oviposition of the invasive two-spotted leafhopper on an endemic tree: Effects of an alien weed, foliar pubescence, and habitat humidity

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          Abstract

          The two-spotted leafhopper, Sophonia rufofascia (Kuoh and Kuoh), is an exotic pest from South-East Asia that attacks a wide variety of plant species in Hawaii. Myrica faya Aiton is an aggressive exotic weed that displaces and excludes native plants in Hawaiian forests. It has been argued that because of the high nutritional quality of its foliage, M. faya might facilitate leafhopper invasion of native Hawaiian ecosystems that were originally dominated by the endemic tree Metrosideros polymorpha (Gaudichaud). In the present study, we quantified suitability of M. faya and M. polymorpha as ovipositional hosts for S. rufofascia. Overall, leafhoppers preferred to deposit their eggs into the foliage of M. faya. M. faya presence in the area did not affect leafhopper oviposition on M. polymorpha. Foliar pubescence provided good protection of hirsute morphotypes of M. polymorpha. At the same time, glabrous M. polymorpha morphotypes were quite suitable for leafhopper oviposition. There was no difference in the abundance of leafhopper eggs along a precipitation gradient. Our results confirm that invasion of native Hawaiian forests by the weed M. faya will facilitate their invasion by S. rufofascia. Because of the broad host range characteristic of the two-spotted leafhopper, this build-up may adversely affect a number of endemic plant species growing in native forests.

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          Biostatistical Analysis

          Designed for one/two-semester, junior/graduate-level courses in Biostatistics, Biometry, Quantitative Biology, or Statistics, the latest edition of this best-selling biostatistics text is both comprehensive and easy to read. It provides a broad and practical overview of the statistical analysis methods used by researchers to collect, summarize, analyze, and draw conclusions from biological research data. The Fourth Edition can serve as either an introduction to the discipline for beginning students or a comprehensive procedural reference for today's practitioners.
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            Biological Invasion by Myrica faya Alters Ecosystem Development in Hawaii.

            The exotic nitrogen-fixing tree Myrica faya invades young volcanic sites where the growth of native plants is limited by a lack of nitrogen. Myrica quadruples the amount of nitrogen entering certain sites and increases the overall biological availability of nitrogen, thereby altering the nature of ecosystem development after volcanic eruptions.
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              Biological Invasion by Myrica Faya in Hawai'i: Plant Demography, Nitrogen Fixation, Ecosystem Effects

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                Author and article information

                Journal
                J Insect Sci
                Journal of Insect Science
                University of Arizona Library
                1536-2442
                2004
                29 April 2004
                : 4
                : 13
                Affiliations
                [1 ]Department of Entomology, University of Hawaii, 3050 Maile Way, Honolulu, HI 96822
                [2 ]Kauai Agricultural Research Center, 7370 Kuamoo Rd., University of Hawaii, Kapaa, HI 96746
                [3 ]Present address: Department of Biological Sciences, University of Maine, 5722 Deering Hall, Orono, ME 04469
                [4 ]Present address: Hawaii State Department of Health, 4398-B Pua Loke St., Lihue, HI 96766
                [5 ] andrei.alyokhin@ 123456umit.maine.edu
                Article
                528873
                15861229
                4905a5ba-f0a2-495b-b0f8-5ce4a64c2af0
                Copyright © 2004. Open access; copyright is maintained by the authors.
                History
                : 7 January 2004
                : 23 March 2004
                Categories
                Articles

                Entomology
                myrica faya,exotic species,sophonia rufofascia,biological invasion,biotic facilitation,metrosideros polymorpha,oviposition

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