Effects of repeated salt pulses on ecosystem structure and functions in a stream mesocosm

Miguel Canedo-Arguelles, Mirco Bundschuh, Cayetano Gutierrez-Canovas, Ben KEFFORD, Narcís Prat, Rosa Trobajo, R Schäfer

    Research output: Contribution to journalArticle

    37 Citations (Scopus)

    Abstract

    Rivers and streams affected by mining activities often receive short-term sharp salinity increases due to watersoluble stockpiled materials being washed into receiving water bodies. We conducted a mesocosm study to explore the response of structural (diatomand streaminvertebrate communities) and functional descriptors (chlorophyll a concentration, fungal biomass and leaf decomposition) to repeated short salinity pulses (3 h of duration, with nominal electrical conductivities of 5, 10 and 15 mS cm-1), mimicking the exposure pattern occurring at salt-mine affected rivers. The experiment was conducted in 12 artificial flow-through stream systems over 16 days. The effect of the salt pulses on the ecosystem structure and functioning did not fully match most of our initial hypotheses, with the community response being weaker than predicted. The diatom community was, however, dominated by salt-tolerant species throughout the experiment, showing no consistent response to the treatment. The invertebrate response was associated with statistically significant changes in community structure (i.e. abundance of the different taxa) but no statistically significant changes in taxa richness. The salt pulses affected some functional descriptors of the ecosystem: fungal biomass exhibited a unimodal response to treatment magnitude, algal growth (i.e. chl a biomass) was hampered with increasing conductivity and leaf decomposition was significantly reduced in the high treatment.
    Original languageEnglish
    Pages (from-to)634-642
    Number of pages9
    JournalScience of the Total Environment
    Volume476-477
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    ecosystem structure
    mesocosm
    ecosystem function
    Ecosystems
    Biomass
    Salts
    salt
    Rivers
    Salt mines
    Decomposition
    biomass
    Chlorophyll
    decomposition
    salinity
    community response
    Experiments
    river
    electrical conductivity
    chlorophyll a
    community structure

    Cite this

    Canedo-Arguelles, M., Bundschuh, M., Gutierrez-Canovas, C., KEFFORD, B., Prat, N., Trobajo, R., & Schäfer, R. (2014). Effects of repeated salt pulses on ecosystem structure and functions in a stream mesocosm. Science of the Total Environment, 476-477, 634-642. https://doi.org/10.1016/j.scitotenv.2013.12.067
    Canedo-Arguelles, Miguel ; Bundschuh, Mirco ; Gutierrez-Canovas, Cayetano ; KEFFORD, Ben ; Prat, Narcís ; Trobajo, Rosa ; Schäfer, R. / Effects of repeated salt pulses on ecosystem structure and functions in a stream mesocosm. In: Science of the Total Environment. 2014 ; Vol. 476-477. pp. 634-642.
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    abstract = "Rivers and streams affected by mining activities often receive short-term sharp salinity increases due to watersoluble stockpiled materials being washed into receiving water bodies. We conducted a mesocosm study to explore the response of structural (diatomand streaminvertebrate communities) and functional descriptors (chlorophyll a concentration, fungal biomass and leaf decomposition) to repeated short salinity pulses (3 h of duration, with nominal electrical conductivities of 5, 10 and 15 mS cm-1), mimicking the exposure pattern occurring at salt-mine affected rivers. The experiment was conducted in 12 artificial flow-through stream systems over 16 days. The effect of the salt pulses on the ecosystem structure and functioning did not fully match most of our initial hypotheses, with the community response being weaker than predicted. The diatom community was, however, dominated by salt-tolerant species throughout the experiment, showing no consistent response to the treatment. The invertebrate response was associated with statistically significant changes in community structure (i.e. abundance of the different taxa) but no statistically significant changes in taxa richness. The salt pulses affected some functional descriptors of the ecosystem: fungal biomass exhibited a unimodal response to treatment magnitude, algal growth (i.e. chl a biomass) was hampered with increasing conductivity and leaf decomposition was significantly reduced in the high treatment.",
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    Canedo-Arguelles, M, Bundschuh, M, Gutierrez-Canovas, C, KEFFORD, B, Prat, N, Trobajo, R & Schäfer, R 2014, 'Effects of repeated salt pulses on ecosystem structure and functions in a stream mesocosm', Science of the Total Environment, vol. 476-477, pp. 634-642. https://doi.org/10.1016/j.scitotenv.2013.12.067

    Effects of repeated salt pulses on ecosystem structure and functions in a stream mesocosm. / Canedo-Arguelles, Miguel; Bundschuh, Mirco; Gutierrez-Canovas, Cayetano; KEFFORD, Ben; Prat, Narcís; Trobajo, Rosa; Schäfer, R.

    In: Science of the Total Environment, Vol. 476-477, 2014, p. 634-642.

    Research output: Contribution to journalArticle

    TY - JOUR

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    AU - Canedo-Arguelles, Miguel

    AU - Bundschuh, Mirco

    AU - Gutierrez-Canovas, Cayetano

    AU - KEFFORD, Ben

    AU - Prat, Narcís

    AU - Trobajo, Rosa

    AU - Schäfer, R

    PY - 2014

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    AB - Rivers and streams affected by mining activities often receive short-term sharp salinity increases due to watersoluble stockpiled materials being washed into receiving water bodies. We conducted a mesocosm study to explore the response of structural (diatomand streaminvertebrate communities) and functional descriptors (chlorophyll a concentration, fungal biomass and leaf decomposition) to repeated short salinity pulses (3 h of duration, with nominal electrical conductivities of 5, 10 and 15 mS cm-1), mimicking the exposure pattern occurring at salt-mine affected rivers. The experiment was conducted in 12 artificial flow-through stream systems over 16 days. The effect of the salt pulses on the ecosystem structure and functioning did not fully match most of our initial hypotheses, with the community response being weaker than predicted. The diatom community was, however, dominated by salt-tolerant species throughout the experiment, showing no consistent response to the treatment. The invertebrate response was associated with statistically significant changes in community structure (i.e. abundance of the different taxa) but no statistically significant changes in taxa richness. The salt pulses affected some functional descriptors of the ecosystem: fungal biomass exhibited a unimodal response to treatment magnitude, algal growth (i.e. chl a biomass) was hampered with increasing conductivity and leaf decomposition was significantly reduced in the high treatment.

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    KW - Ecosystem functioning

    KW - Pulse disturbances

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    DO - 10.1016/j.scitotenv.2013.12.067

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    JO - Science of the Total Environment

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    ER -