Changes in epilithic biomasses and invertebrate community structure over a deposit metal concentration gradient in upland headwater streams

Katrina Ann Macintosh, David Griffiths

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Stream bed metal deposits affect the taxon richness, density and taxonomic diversity of primary and secondary producers by a variety of direct or indirect abiotic and biotic processes but little is known about the relative importance of these processes over a deposit metal concentration gradient. Inorganic matter (IM), algal, and non-photosynthetic detrital (NPD) dry biomasses were estimated for 10 monthly samples, between 2007 and 2008, from eight sites differing in deposit density. Invertebrate abundance, taxon richness and composition were also determined. Relations between these variables were investigated by canonical correspondence analysis (CCA), generalized estimating equation models and path analysis. The first CCA axis correlates with deposit density and invertebrate abundance, with lumbriculids and chironomids increasing in abundance with deposit density and all other taxa declining. Community structure changes significantly above a deposit density of approximately 8 mg cm-2, when algal biomass, invertebrate richness and diversity decline. Invertebrate richness and diversity were determined by direct effects of NPD biomass and indirect effects of IM. Algal biomass only had an effect on invertebrate abundance. Possible pH, oxygen, food and ecotoxicological effects of NPD biomass on the biota are discussed.
    LanguageEnglish
    JournalHydrobiologia
    VolumeIn pre
    DOIs
    Publication statusPublished - May 2015

    Fingerprint

    headwater
    community structure
    invertebrate
    metal
    biomass
    inorganic matter
    correspondence analysis
    stream bed
    path analysis
    biota
    oxygen
    food
    effect

    Keywords

    • Metal deposits • Invertebrate richness and composition • Algal biomass • Non-photosynthetic detrital biomass • Direct and indirect pathways

    Cite this

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    title = "Changes in epilithic biomasses and invertebrate community structure over a deposit metal concentration gradient in upland headwater streams",
    abstract = "Stream bed metal deposits affect the taxon richness, density and taxonomic diversity of primary and secondary producers by a variety of direct or indirect abiotic and biotic processes but little is known about the relative importance of these processes over a deposit metal concentration gradient. Inorganic matter (IM), algal, and non-photosynthetic detrital (NPD) dry biomasses were estimated for 10 monthly samples, between 2007 and 2008, from eight sites differing in deposit density. Invertebrate abundance, taxon richness and composition were also determined. Relations between these variables were investigated by canonical correspondence analysis (CCA), generalized estimating equation models and path analysis. The first CCA axis correlates with deposit density and invertebrate abundance, with lumbriculids and chironomids increasing in abundance with deposit density and all other taxa declining. Community structure changes significantly above a deposit density of approximately 8 mg cm-2, when algal biomass, invertebrate richness and diversity decline. Invertebrate richness and diversity were determined by direct effects of NPD biomass and indirect effects of IM. Algal biomass only had an effect on invertebrate abundance. Possible pH, oxygen, food and ecotoxicological effects of NPD biomass on the biota are discussed.",
    keywords = "Metal deposits • Invertebrate richness and composition • Algal biomass • Non-photosynthetic detrital biomass • Direct and indirect pathways",
    author = "Macintosh, {Katrina Ann} and David Griffiths",
    year = "2015",
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    volume = "In pre",
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    Changes in epilithic biomasses and invertebrate community structure over a deposit metal concentration gradient in upland headwater streams. / Macintosh, Katrina Ann; Griffiths, David.

    In: Hydrobiologia, Vol. In pre, 05.2015.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Changes in epilithic biomasses and invertebrate community structure over a deposit metal concentration gradient in upland headwater streams

    AU - Macintosh, Katrina Ann

    AU - Griffiths, David

    PY - 2015/5

    Y1 - 2015/5

    N2 - Stream bed metal deposits affect the taxon richness, density and taxonomic diversity of primary and secondary producers by a variety of direct or indirect abiotic and biotic processes but little is known about the relative importance of these processes over a deposit metal concentration gradient. Inorganic matter (IM), algal, and non-photosynthetic detrital (NPD) dry biomasses were estimated for 10 monthly samples, between 2007 and 2008, from eight sites differing in deposit density. Invertebrate abundance, taxon richness and composition were also determined. Relations between these variables were investigated by canonical correspondence analysis (CCA), generalized estimating equation models and path analysis. The first CCA axis correlates with deposit density and invertebrate abundance, with lumbriculids and chironomids increasing in abundance with deposit density and all other taxa declining. Community structure changes significantly above a deposit density of approximately 8 mg cm-2, when algal biomass, invertebrate richness and diversity decline. Invertebrate richness and diversity were determined by direct effects of NPD biomass and indirect effects of IM. Algal biomass only had an effect on invertebrate abundance. Possible pH, oxygen, food and ecotoxicological effects of NPD biomass on the biota are discussed.

    AB - Stream bed metal deposits affect the taxon richness, density and taxonomic diversity of primary and secondary producers by a variety of direct or indirect abiotic and biotic processes but little is known about the relative importance of these processes over a deposit metal concentration gradient. Inorganic matter (IM), algal, and non-photosynthetic detrital (NPD) dry biomasses were estimated for 10 monthly samples, between 2007 and 2008, from eight sites differing in deposit density. Invertebrate abundance, taxon richness and composition were also determined. Relations between these variables were investigated by canonical correspondence analysis (CCA), generalized estimating equation models and path analysis. The first CCA axis correlates with deposit density and invertebrate abundance, with lumbriculids and chironomids increasing in abundance with deposit density and all other taxa declining. Community structure changes significantly above a deposit density of approximately 8 mg cm-2, when algal biomass, invertebrate richness and diversity decline. Invertebrate richness and diversity were determined by direct effects of NPD biomass and indirect effects of IM. Algal biomass only had an effect on invertebrate abundance. Possible pH, oxygen, food and ecotoxicological effects of NPD biomass on the biota are discussed.

    KW - Metal deposits • Invertebrate richness and composition • Algal biomass • Non-photosynthetic detrital biomass • Direct and indirect pathways

    U2 - 10.1007/s10750-015-2323-0

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