The replacement of Stenonema spp. By Caenis diminuta walker as the numerical dominant in the mayfly assemblage of a thermally-stressed stream

LeRoy POFF, R.A. Matthews

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Mayfly community structures in a thermally-stressed, previously thermally-stressed and an undisturbed stream were compared based on nymphal colonization of leaf packs incubated over a 48 d period from December 1982 to February 1983. Temperatures ranged from 7–31C in the thermally-stressed stream and from 4–12C in the other two streams. Accumulated degree days (>0C) were 734, 340 and 322 for the thermally-stressed, post-stressed and undisturbed streams, respectively. Stenonema spp. numerically dominated the mayfly fauna over the sampling period in the undisturbed (70%) and post-stressed (98%) streams, but was replaced by Caenis diminuta Walker (88%) in the stream receiving thermal effluent from a nuclear production reactor. Caenis diminuta is tolerant of rapidly fluctuating (Delta;T > 11C/hr) and high temperatures (possibly up to 40C).
    Original languageEnglish
    Pages (from-to)19-26
    Number of pages8
    JournalJournal of Freshwater Ecology
    Volume3
    Issue number1
    DOIs
    Publication statusPublished - 1985

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    Caenis
    mayfly
    Ephemeroptera
    replacement
    heat sums
    effluents
    temperature
    community structure
    colonization
    fauna
    effluent
    heat
    sampling

    Cite this

    @article{fe29d24eddfa4b2795437e2e49da2851,
    title = "The replacement of Stenonema spp. By Caenis diminuta walker as the numerical dominant in the mayfly assemblage of a thermally-stressed stream",
    abstract = "Mayfly community structures in a thermally-stressed, previously thermally-stressed and an undisturbed stream were compared based on nymphal colonization of leaf packs incubated over a 48 d period from December 1982 to February 1983. Temperatures ranged from 7–31C in the thermally-stressed stream and from 4–12C in the other two streams. Accumulated degree days (>0C) were 734, 340 and 322 for the thermally-stressed, post-stressed and undisturbed streams, respectively. Stenonema spp. numerically dominated the mayfly fauna over the sampling period in the undisturbed (70{\%}) and post-stressed (98{\%}) streams, but was replaced by Caenis diminuta Walker (88{\%}) in the stream receiving thermal effluent from a nuclear production reactor. Caenis diminuta is tolerant of rapidly fluctuating (Delta;T > 11C/hr) and high temperatures (possibly up to 40C).",
    author = "LeRoy POFF and R.A. Matthews",
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    year = "1985",
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    The replacement of Stenonema spp. By Caenis diminuta walker as the numerical dominant in the mayfly assemblage of a thermally-stressed stream. / POFF, LeRoy; Matthews, R.A.

    In: Journal of Freshwater Ecology, Vol. 3, No. 1, 1985, p. 19-26.

    Research output: Contribution to journalArticle

    TY - JOUR

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    AU - POFF, LeRoy

    AU - Matthews, R.A.

    N1 - cited By 2

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    N2 - Mayfly community structures in a thermally-stressed, previously thermally-stressed and an undisturbed stream were compared based on nymphal colonization of leaf packs incubated over a 48 d period from December 1982 to February 1983. Temperatures ranged from 7–31C in the thermally-stressed stream and from 4–12C in the other two streams. Accumulated degree days (>0C) were 734, 340 and 322 for the thermally-stressed, post-stressed and undisturbed streams, respectively. Stenonema spp. numerically dominated the mayfly fauna over the sampling period in the undisturbed (70%) and post-stressed (98%) streams, but was replaced by Caenis diminuta Walker (88%) in the stream receiving thermal effluent from a nuclear production reactor. Caenis diminuta is tolerant of rapidly fluctuating (Delta;T > 11C/hr) and high temperatures (possibly up to 40C).

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