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Responses of three generations of a xylem-feeding insect, Neophilaenus lineatus (Homoptera), to elevated CO2.

Brooks, G. L. and Whittaker, J. B. (1999) Responses of three generations of a xylem-feeding insect, Neophilaenus lineatus (Homoptera), to elevated CO2. Global Change Biology, 5 (4). pp. 395-401. ISSN 1354-1013

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Abstract

A population of the xylem-feeding spittlebug, Neophilaenus lineatus, on blocks of natural vegetation transferred to large hemispherical chambers was studied over two generations with continuous exposure to elevated CO2 (600 ppm). The third generation was transferred from the blocks to potted Juncus squarrosus to enable measurements of fecundity. The principal food plant throughout was Juncus squarrosus. Survival of the nymphs was reduced by more than 20% in elevated CO2 relative to ambient (350 ppm) in both years of the main experiment. Elevated CO2 also delayed development by one or more nymphal instars in each year. Fecundity was not significantly affected. The C/N ratio of whole Juncus leaves was increased in elevated CO2 and the transpiration rates of the plants were reduced. These changes may have been responsible for the effect of elevated CO2 on spittlebug performance. However, other factors such as plant architecture and microclimate may also be important.

Item Type: Article
Journal or Publication Title: Global Change Biology
Uncontrolled Keywords: development • elevated carbon dioxide • herbivory • insect • survival • xylem feeding
Subjects: Q Science > QH Natural history > QH301 Biology
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 10926
Deposited By: Mr Richard Ingham
Deposited On: 28 Jul 2008 09:16
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2013 16:00
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/10926

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