Measurement of volatile terpene emissions in 70 dominant vascular plant species in Hawaii: Aliens emit more than natives

Joan Llusià, Josep Peñuelas, Jordi Sardans, Susan M. Owen, Ülo Niinemets

    Research output: Contribution to journalArticleResearchpeer-review

    33 Citations (Scopus)

    Abstract

    Aim Alien plant invasion is prominent in the Hawaiian Islands. There are many factors involved in invader success. To date, there is a general lack of information about one of them, which we aim to study here: the terpene emission capacity of both Hawaiian native and alien plants.Location Oahu (Hawaii).Methods We screened 35 alien and 35 native dominant plant species on Oahu Island for monoterpene emissions. The emission rates were measured from field-grown plants under standardized conditions of temperature and quantum flux density in the laboratory.Results The emission rates of total terpenes ranged from 0 μg g-1 h-1 to 55 μg g-1 h-1, and altogether 15 different terpenes were emitted in detectable amounts by the overall set of species. A phylogenetic signal was observed for total terpene emissions. Total terpene emission rates were higher in aliens than in native species (12.8 ± 2.0 vs. 7.6 ± 1.9 μg g-1 h-1, respectively).Main conclusions The greater terpene emission capacity may confer protection against multiple stresses and may partly account for the success of the invasive species, and may make invasive species more competitive in response to new global change-driven combined stresses. These results are consistent with aliens coming from very diverse ecosystems with generally higher biotic and abiotic stress pressures, and having higher nutrient concentrations. On the contrary, these results are not consistent with the 'excess carbon' hypotheses. These results indicate changes in vegetation terpene emissions brought about by alien plant invasions. © 2010 Blackwell Publishing Ltd.
    Original languageEnglish
    Pages (from-to)863-874
    JournalGlobal Ecology and Biogeography
    Volume19
    Issue number6
    DOIs
    Publication statusPublished - 1 Nov 2010

    Keywords

    • α-pinene
    • Alien species
    • Hawaiian Islands
    • Monoterpenes
    • Nitrogen
    • Phosphorus
    • Sesquiterpenes
    • Species invasions
    • Terpene emission

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