Tropical mosquito assemblages demonstrate 'Textbook' annual cycles

Donald Franklin, P WHELAN

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Background: Annual biological rhythms are often depicted as predictably cyclic, but quantitative evaluations are few and rarely both cyclic and constant among years. In the monsoon tropics, the intense seasonality of rainfall frequently drives fluctuations in the populations of short-lived aquatic organisms. However, it is unclear how predictably assemblage composition will fluctuate because the intensity, onset and cessation of the wet season varies greatly among years. Methodology/Principal Findings: Adult mosquitoes were sampled using EVS suction traps baited with carbon dioxide around swamplands adjacent to the city of Darwin in northern Australia. Eleven sites were sampled weekly for five years, and one site weekly for 24 years, the sample of c. 1.4 million mosquitoes yielding 63 species. Mosquito abundance, species richness and diversity fluctuated seasonally, species richness being highly predictable. Ordination of assemblage composition demonstrated striking annual cycles that varied little from year to year. The mosquito assemblage was temporally structured by a succession of species peaks in abundance. Conclusion/Significance: Ordination provided strong visual representation of annual rhythms in assemblage composition and the means to evaluate variability among years. Because most mosquitoes breed in shallow freshwater which fluctuates with rainfall, we did not anticipate such repeatability; we conclude that mosquito assemblage composition appears adapted to predictable elements of the rainfall. � 2009 Franklin, Whelan.
    Original languageEnglish
    Pages (from-to)e8296-
    JournalPLoS One
    Volume4
    Issue number12
    Publication statusPublished - 2009

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    Textbooks
    Culicidae
    Rain
    Chemical analysis
    Aquatic organisms
    rain
    Tropics
    species diversity
    Carbon Dioxide
    suction traps
    biological rhythms
    Aquatic Organisms
    Suction
    aquatic organisms
    Periodicity
    Fresh Water
    repeatability
    tropics
    wet season
    carbon dioxide

    Cite this

    Franklin, D., & WHELAN, P. (2009). Tropical mosquito assemblages demonstrate 'Textbook' annual cycles. PLoS One, 4(12), e8296-.
    Franklin, Donald ; WHELAN, P. / Tropical mosquito assemblages demonstrate 'Textbook' annual cycles. In: PLoS One. 2009 ; Vol. 4, No. 12. pp. e8296-.
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    abstract = "Background: Annual biological rhythms are often depicted as predictably cyclic, but quantitative evaluations are few and rarely both cyclic and constant among years. In the monsoon tropics, the intense seasonality of rainfall frequently drives fluctuations in the populations of short-lived aquatic organisms. However, it is unclear how predictably assemblage composition will fluctuate because the intensity, onset and cessation of the wet season varies greatly among years. Methodology/Principal Findings: Adult mosquitoes were sampled using EVS suction traps baited with carbon dioxide around swamplands adjacent to the city of Darwin in northern Australia. Eleven sites were sampled weekly for five years, and one site weekly for 24 years, the sample of c. 1.4 million mosquitoes yielding 63 species. Mosquito abundance, species richness and diversity fluctuated seasonally, species richness being highly predictable. Ordination of assemblage composition demonstrated striking annual cycles that varied little from year to year. The mosquito assemblage was temporally structured by a succession of species peaks in abundance. Conclusion/Significance: Ordination provided strong visual representation of annual rhythms in assemblage composition and the means to evaluate variability among years. Because most mosquitoes breed in shallow freshwater which fluctuates with rainfall, we did not anticipate such repeatability; we conclude that mosquito assemblage composition appears adapted to predictable elements of the rainfall. � 2009 Franklin, Whelan.",
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    Franklin, D & WHELAN, P 2009, 'Tropical mosquito assemblages demonstrate 'Textbook' annual cycles', PLoS One, vol. 4, no. 12, pp. e8296-.

    Tropical mosquito assemblages demonstrate 'Textbook' annual cycles. / Franklin, Donald; WHELAN, P.

    In: PLoS One, Vol. 4, No. 12, 2009, p. e8296-.

    Research output: Contribution to journalArticleResearchpeer-review

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    AU - WHELAN, P

    PY - 2009

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