Spatial and temporal influences of in-stream factors on the chemistry and epilithic biomasses of upland stream metal deposits

Katrina A Macintosh, David Griffiths

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    1 Citation (Scopus)

    Abstract

    The density and composition of stream bed metal deposits are affected by physical, chemical and biological processes. In this paper we investigate the importance of these processes and their relation to algal and non-photosynthetic detrital (NPD) biomass in a set of upland streams in Northern Ireland. Deposit density and Fe, Mn, Al and P concentrations varied with stream pH across sites but not seasonally. No effects of stream bed erosion or photoreduction were detected on deposit densities. Seasonal variation in stream water metal concentrations was correlated with rainfall. NPD biomass was a significant predictor of both spatial and seasonal variation in deposit concentrations. There were strong, non-linear, relations between NPD biomass and deposit metal concentrations, with Fe and Mn becoming relatively more important and algal biomass declining above threshold deposit/NPD densities. The results suggest that NPD biomass influences deposit density and reduces the biomass of photosynthetic autotrophs above a threshold deposit density.
    LanguageEnglish
    JournalAquatic Sciences
    Volume76 (3)
    Issue numberpp. 33
    DOIs
    Publication statusPublished - 2014

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    metal
    biomass
    stream bed
    seasonal variation
    chemical process
    biological processes
    spatial variation
    erosion
    rainfall
    water

    Cite this

    @article{41c57a16fc3741e5a2ecd6a4bf79b15f,
    title = "Spatial and temporal influences of in-stream factors on the chemistry and epilithic biomasses of upland stream metal deposits",
    abstract = "The density and composition of stream bed metal deposits are affected by physical, chemical and biological processes. In this paper we investigate the importance of these processes and their relation to algal and non-photosynthetic detrital (NPD) biomass in a set of upland streams in Northern Ireland. Deposit density and Fe, Mn, Al and P concentrations varied with stream pH across sites but not seasonally. No effects of stream bed erosion or photoreduction were detected on deposit densities. Seasonal variation in stream water metal concentrations was correlated with rainfall. NPD biomass was a significant predictor of both spatial and seasonal variation in deposit concentrations. There were strong, non-linear, relations between NPD biomass and deposit metal concentrations, with Fe and Mn becoming relatively more important and algal biomass declining above threshold deposit/NPD densities. The results suggest that NPD biomass influences deposit density and reduces the biomass of photosynthetic autotrophs above a threshold deposit density.",
    author = "Macintosh, {Katrina A} and David Griffiths",
    year = "2014",
    doi = "10.1007/s00027-014-0338-7",
    language = "English",
    volume = "76 (3)",
    journal = "Aquatic Sciences",
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    Spatial and temporal influences of in-stream factors on the chemistry and epilithic biomasses of upland stream metal deposits. / Macintosh, Katrina A; Griffiths, David.

    In: Aquatic Sciences, Vol. 76 (3), No. pp. 33, 2014.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Spatial and temporal influences of in-stream factors on the chemistry and epilithic biomasses of upland stream metal deposits

    AU - Macintosh, Katrina A

    AU - Griffiths, David

    PY - 2014

    Y1 - 2014

    N2 - The density and composition of stream bed metal deposits are affected by physical, chemical and biological processes. In this paper we investigate the importance of these processes and their relation to algal and non-photosynthetic detrital (NPD) biomass in a set of upland streams in Northern Ireland. Deposit density and Fe, Mn, Al and P concentrations varied with stream pH across sites but not seasonally. No effects of stream bed erosion or photoreduction were detected on deposit densities. Seasonal variation in stream water metal concentrations was correlated with rainfall. NPD biomass was a significant predictor of both spatial and seasonal variation in deposit concentrations. There were strong, non-linear, relations between NPD biomass and deposit metal concentrations, with Fe and Mn becoming relatively more important and algal biomass declining above threshold deposit/NPD densities. The results suggest that NPD biomass influences deposit density and reduces the biomass of photosynthetic autotrophs above a threshold deposit density.

    AB - The density and composition of stream bed metal deposits are affected by physical, chemical and biological processes. In this paper we investigate the importance of these processes and their relation to algal and non-photosynthetic detrital (NPD) biomass in a set of upland streams in Northern Ireland. Deposit density and Fe, Mn, Al and P concentrations varied with stream pH across sites but not seasonally. No effects of stream bed erosion or photoreduction were detected on deposit densities. Seasonal variation in stream water metal concentrations was correlated with rainfall. NPD biomass was a significant predictor of both spatial and seasonal variation in deposit concentrations. There were strong, non-linear, relations between NPD biomass and deposit metal concentrations, with Fe and Mn becoming relatively more important and algal biomass declining above threshold deposit/NPD densities. The results suggest that NPD biomass influences deposit density and reduces the biomass of photosynthetic autotrophs above a threshold deposit density.

    U2 - 10.1007/s00027-014-0338-7

    DO - 10.1007/s00027-014-0338-7

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    VL - 76 (3)

    JO - Aquatic Sciences

    T2 - Aquatic Sciences

    JF - Aquatic Sciences

    SN - 1015-1621

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