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  • 1
    Electronic Resource
    Electronic Resource
    Interactions between tree roots, mycorrhizas, a saprotrophic fungus and the decomposition of organic substrates in a microcosm (1987)
    Springer
    Biology and fertility of soils 4 (1987), S. 145-150 
    Details
    ISSN: 1432-0789
    Keywords: Mycorrhizas ; Saprotrophic fungi ; Interactions ; Decomposition ; Microcosms ; Mycena galopus ; Suillus luteus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A microcosm technique has been used to evaluate the effects of tree seedling root systems, their mycorrhizas and a saprotrophic basidiomycete fungus and their interactions in the decomposition of organic substrates. The component elements were added to the experimental system in a factorially designed experiment of increasing complexity. Roots and mycorrhizas significantly enhance the rate of decomposition of the substrates. The mycorrhizal fungus Suillus luteus was the most active decomposer of all substrates. This root-induced enhancement of decomposition was suppressed in the presence of the saprotroph, Mycena galopus. Plant growth was influenced by the substrate, in that the nitrogen-containing substrates, hide powder and chitin, promoted greater growth than the pure carbohydrate, cotton. Presence of the saprotroph, Mycena galopus significantly enhanced tree growth. The data are discussed in relation to previous studies on the influence of roots and their mycorrhizas on decomposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256988
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Long-term study of litter decomposition on a Pennine peat bog: which regression? (1997)
    Springer
    Oecologia 113 (1997), S. 94-103 
    Details
    ISSN: 1432-1939
    Keywords: Key words Litter decomposition ; Long-term ; Regression models ; Moorland ; Variability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract It is estimated that in the northern hemisphere one-third of the world pool of soil carbon is contained in peat resulting from an incomplete decomposition of plant remains. The time course for the decomposition of the predominant plant litters on a Pennine moorland in northern England is reported for a study extending over 23 years. Spatial variation of the weight remaining of decomposing litters increased with time. This experimental study gave an age for the upper layers of the bog and a curve for long-term decay based on direct observation rather than inferred from profile samples or from short-term observations. It showed that short-term observations can give misleading results in the long term, with a variety of litters with differing early decay rates ultimately making a similar contribution to accumulation. Spatial variation of the weight remaining of the decomposing litters increased with time, so that variation within micro-environments, or within apparantly uniform substrates, may contribute significantly to organic matter accumulation. An asymptotic curve best described the long-term course of decomposition leading to the accumulation of peat. The use of the model for the three litter types, Calluna vulgaris, Eriophorum vaginatum and Rubus chamaemorus, is described and the implication of the results for modelling of organic matter accumulation are then discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420050357
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Axenic cultivation of an Enchytraeid worm, Cognettia sphagnetorum (1977)
    Springer
    Oecologia 31 (1977), S. 251-254 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Treatment with an antibiotic mixture of penicillin, streptomycin and framycetin freed approximately 60% of individuals of the enchytraeid worm, C. sphagnetorum from living microorganisms and caused no deleterious behavioural changes. Fungi accounted for half of the remaining contamination. Feeding experiments showed that living microorganisms are not an essential requirement for the worm since treated worms grew as well, or slightly better than untreated worms, on both sterile irradiated and non-sterile foods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00346925
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    Paper (German National Licenses)
    Fulltext
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