Extreme streams: Species persistence and genomic change in montane insect populations across a flooding gradient

N.L. Poff, E.I. Larson, P.E. Salerno, S.G. Morton, B.C. Kondratieff, A.S. Flecker, K.R. Zamudio, W.C. Funk

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    The ecological and evolutionary consequences of extreme events are poorly understood. Here, we tested predictions about species persistence and population genomic change in aquatic insects in 14 Colorado mountain streams across a hydrological disturbance gradient caused by a one in 500-year rainfall event. Taxa persistence ranged from 39 to 77% across sites and declined with increasing disturbance in relation to species’ resistance and resilience traits. For taxa with mobile larvae and terrestrial adult stages present at the time of the flood, average persistence was 84% compared to 25% for immobile taxa that lacked terrestrial adults. For two of six species analysed, genomic diversity (allelic richness) declined after the event. For one species it greatly expanded, suggesting resilience via re-colonisation from upstream populations. Thus, while resistance and resilience traits can explain species persistence to extreme disturbance, population genomic change varies among species, challenging generalisations about evolutionary responses to extreme events at landscape scales.
    Original languageEnglish
    JournalEcology Letters
    DOIs
    Publication statusPublished - 2018

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    genomics
    persistence
    flooding
    insect
    insects
    aquatic insects
    mountains
    extreme event
    rain
    disturbance
    prediction
    larvae
    mountain stream
    recolonization
    larva
    rainfall

    Cite this

    Poff, N. L., Larson, E. I., Salerno, P. E., Morton, S. G., Kondratieff, B. C., Flecker, A. S., ... Funk, W. C. (2018). Extreme streams: Species persistence and genomic change in montane insect populations across a flooding gradient. Ecology Letters. https://doi.org/10.1111/ele.12918
    Poff, N.L. ; Larson, E.I. ; Salerno, P.E. ; Morton, S.G. ; Kondratieff, B.C. ; Flecker, A.S. ; Zamudio, K.R. ; Funk, W.C. / Extreme streams: Species persistence and genomic change in montane insect populations across a flooding gradient. In: Ecology Letters. 2018.
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    abstract = "The ecological and evolutionary consequences of extreme events are poorly understood. Here, we tested predictions about species persistence and population genomic change in aquatic insects in 14 Colorado mountain streams across a hydrological disturbance gradient caused by a one in 500-year rainfall event. Taxa persistence ranged from 39 to 77{\%} across sites and declined with increasing disturbance in relation to species’ resistance and resilience traits. For taxa with mobile larvae and terrestrial adult stages present at the time of the flood, average persistence was 84{\%} compared to 25{\%} for immobile taxa that lacked terrestrial adults. For two of six species analysed, genomic diversity (allelic richness) declined after the event. For one species it greatly expanded, suggesting resilience via re-colonisation from upstream populations. Thus, while resistance and resilience traits can explain species persistence to extreme disturbance, population genomic change varies among species, challenging generalisations about evolutionary responses to extreme events at landscape scales.",
    author = "N.L. Poff and E.I. Larson and P.E. Salerno and S.G. Morton and B.C. Kondratieff and A.S. Flecker and K.R. Zamudio and W.C. Funk",
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    Poff, NL, Larson, EI, Salerno, PE, Morton, SG, Kondratieff, BC, Flecker, AS, Zamudio, KR & Funk, WC 2018, 'Extreme streams: Species persistence and genomic change in montane insect populations across a flooding gradient', Ecology Letters. https://doi.org/10.1111/ele.12918

    Extreme streams: Species persistence and genomic change in montane insect populations across a flooding gradient. / Poff, N.L.; Larson, E.I.; Salerno, P.E.; Morton, S.G.; Kondratieff, B.C.; Flecker, A.S.; Zamudio, K.R.; Funk, W.C.

    In: Ecology Letters, 2018.

    Research output: Contribution to journalArticle

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    T1 - Extreme streams: Species persistence and genomic change in montane insect populations across a flooding gradient

    AU - Poff, N.L.

    AU - Larson, E.I.

    AU - Salerno, P.E.

    AU - Morton, S.G.

    AU - Kondratieff, B.C.

    AU - Flecker, A.S.

    AU - Zamudio, K.R.

    AU - Funk, W.C.

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    AB - The ecological and evolutionary consequences of extreme events are poorly understood. Here, we tested predictions about species persistence and population genomic change in aquatic insects in 14 Colorado mountain streams across a hydrological disturbance gradient caused by a one in 500-year rainfall event. Taxa persistence ranged from 39 to 77% across sites and declined with increasing disturbance in relation to species’ resistance and resilience traits. For taxa with mobile larvae and terrestrial adult stages present at the time of the flood, average persistence was 84% compared to 25% for immobile taxa that lacked terrestrial adults. For two of six species analysed, genomic diversity (allelic richness) declined after the event. For one species it greatly expanded, suggesting resilience via re-colonisation from upstream populations. Thus, while resistance and resilience traits can explain species persistence to extreme disturbance, population genomic change varies among species, challenging generalisations about evolutionary responses to extreme events at landscape scales.

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