Influence of landfill gas on the microdistribution of grass establishment through natural colonization

Douglas H. Trotter, John A. Cooke

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Many revegetated landfills have poor cover including bare areas where plants do not grow. This study, on the Bisasar Road Landfill site in South Africa, assessed grass species preferences to microhabitat conditions in a mosaic of patches of well-established grassed areas and bare, nonvegetated areas. Factors, including soil CO2, CH4, O2, nutrients, and other general soil conditions, were measured in relation to species distribution and grass biomass in the field. Cynodon dactylon was the dominant grass in the established grass areas but was less abundant in the areas bordering the bare areas where Paspalum paspalodes and Sporobolus africanus were common. A number of soil factors measured were significantly correlated with grass biomass and these included Mg, Ca, Zn, Mn, K, temperature, moisture, and CO2. However, a laboratory bioassay using the growth of C. dactylon with soils removed from the landfill indicated that there were no differences in the soils from the bare areas and those that supported high plant biomass. Thus, no nutrient deficiency or chemical toxicity was inherent in the soil in the laboratory. The results of the field investigation and bioassay indicated that soil CO2 as a result of landfill gas infiltration into the root zone was probably the main factor causing bare areas on the landfill where no grass species could colonize and grow and that C. dactylon was more sensitive to elevated soil CO2 than other grass species such as P. paspalodes and S. africanus.

    Original languageEnglish
    Pages (from-to)303-310
    Number of pages8
    JournalEnvironmental Management
    Volume35
    Issue number3
    DOIs
    Publication statusPublished - Mar 2005

    Fingerprint

    Land fill
    colonization
    Gases
    grass
    Soils
    landfill
    soil
    Biomass
    Bioassay
    bioassay
    biomass
    Nutrients
    nutrient
    landfill gas
    microhabitat
    rhizosphere
    Infiltration
    infiltration
    Toxicity
    moisture

    All Science Journal Classification (ASJC) codes

    • Environmental Science(all)
    • Environmental Chemistry

    Cite this

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    abstract = "Many revegetated landfills have poor cover including bare areas where plants do not grow. This study, on the Bisasar Road Landfill site in South Africa, assessed grass species preferences to microhabitat conditions in a mosaic of patches of well-established grassed areas and bare, nonvegetated areas. Factors, including soil CO2, CH4, O2, nutrients, and other general soil conditions, were measured in relation to species distribution and grass biomass in the field. Cynodon dactylon was the dominant grass in the established grass areas but was less abundant in the areas bordering the bare areas where Paspalum paspalodes and Sporobolus africanus were common. A number of soil factors measured were significantly correlated with grass biomass and these included Mg, Ca, Zn, Mn, K, temperature, moisture, and CO2. However, a laboratory bioassay using the growth of C. dactylon with soils removed from the landfill indicated that there were no differences in the soils from the bare areas and those that supported high plant biomass. Thus, no nutrient deficiency or chemical toxicity was inherent in the soil in the laboratory. The results of the field investigation and bioassay indicated that soil CO2 as a result of landfill gas infiltration into the root zone was probably the main factor causing bare areas on the landfill where no grass species could colonize and grow and that C. dactylon was more sensitive to elevated soil CO2 than other grass species such as P. paspalodes and S. africanus.",
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    Influence of landfill gas on the microdistribution of grass establishment through natural colonization. / Trotter, Douglas H.; Cooke, John A.

    In: Environmental Management, Vol. 35, No. 3, 03.2005, p. 303-310.

    Research output: Contribution to journalArticle

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