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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science, Ltd
    Freshwater biology 41 (1999), S. 0 
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 1. The effects of solar radiation on bacterial and fungal growth on aquatic macrophyte detritus were studied in a microcosm experiment. Senescent leaves of Phragmites australis were incubated for 63 days in shallow water in the shade under photosynthetically active radiation (PAR) together with ultraviolet radiation, or under filters removing either ultraviolet B (UVB) or both UVB and ultraviolet A (UVA).2. Bacterial abundance and bacterial 3H-leucine incorporation in the water were measured, together with α- and β-D-glucosidase activity. In addition, bacterial abundance and fungal biomass associated with the litter were measured.3. The results indicate that both PAR and UVA affect the micro-organisms involved in the decomposition of leaf litter. The α/β-D-glucosidase activity ratio was less than one in irradiated and more than one in shaded microcosms, suggesting a change in the substrate dissolved organic matter composition towards more β- than α-glycosidic linkages as a result of solar radiation.4. Microcosms receiving UVB displayed a significantly higher β-D-glucosidase activity than shaded microcosms, and those exposed to PAR or PAR + UVA, demonstrating the potential importance of UVB radiation.5. The free-living bacteria tended to be dominated by filamentous forms in microcosms subject to solar radiation, especially PAR, and attached microbial communities showed a greater tendency to be dominated by bacteria in irradiated microcosms than in shaded microcosms.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical Systematics and Ecology 22 (1994), S. 13-23 
    ISSN: 0305-1978
    Keywords: SDS-PAGE ; Stress protein ; genetic variability ; heavy metal ; isoenzyme electrophoresis ; phosphoglucomutase ; phosphoglucose-isomerase ; resistance ; soil pollution
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 415 (2002), S. 861-862 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Dissolved organic matter in the oceans represents one of the biosphere's principal stores of organic carbon. A large proportion of this matter is drained from the continents — particularly from northern peatlands, which contain 20% of the global soil carbon. Freeman et al. have suggested ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Water, air & soil pollution 47 (1989), S. 189-215 
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Ecological and physiological effects of heavy metals on terrestrial organisms are reviewed, considering evidence from both laboratory and field studies. Problems concerning how to define heavy-metal exposure and to assess the sensitivity of field biota to heavy metals are discussed. Mechanisms of heavy-metal tolerance are considered including avoidance, exclusion, immobilization and excretion, as well biochemical mechanisms including enzymatic change. The taxonomy of heavy-metal tolerance and problems concerning tolerance and ecological performance are discussed briefly. Efforts are made to compare the relative sensitivity of various groups, including bacteria, fungi, bryophytes, lichens, vascular plants and soil invertebrates. An emphasis is placed on organisms of temperate forest ecosystems, particularly coniferous forests.
    Type of Medium: Electronic Resource
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  • 5
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    In:  EPIC3Marine ecology-progress series, 191, pp. 1-18
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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